1
|
Paddy EN, Afolabi OOD, Sohail M. Exploring toilet plume bioaerosol exposure dynamics in public toilets using a Design of Experiments approach. Sci Rep 2024; 14:10665. [PMID: 38724540 PMCID: PMC11082142 DOI: 10.1038/s41598-024-61039-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/30/2024] [Indexed: 05/12/2024] Open
Abstract
Bioaerosols generated during toilet flushing can contribute to the spread of airborne pathogens and cross-contamination in indoor environments. This presents an increased risk of fomite-mediated or aerosol disease transmission. This study systematically investigated the factors contributing to increased bioaerosol exposure following toilet flushing and developed an empirical model for predicting the exposure-relevant bioaerosol concentration. Air in a toilet cubicle was sampled by impaction after seeding with Clostridium difficile spores. Design of Experiments (DoE) main effects screening and full factorial design approaches were then employed to investigate the significant factors that heighten the risk of exposure to bioaerosols post-flush. Our findings reveal that the inoculated bacterial concentration (C), time elapsed after flushing (t), lateral distance (d), and mechanical ventilation (v) are significant predictors of bioaerosol concentration, with p-values < 0.05. The interaction term, C × d showed a marked increase in bioaerosol concentration up to 232 CFU/m3 at the closest proximity and highest pathogen load. The interplay of C and t (C × t) demonstrated a time-dependent attenuation of bioaerosol viability, with concentrations peaking at 241 CFU/m3 immediately post-flush and notably diminishing over time. The lateral distance and time post-flush (d × t) interaction also revealed a gradual decrease in bioaerosol concentration, highlighting the effectiveness of spatial and temporal dilution in mitigating bioaerosol exposure risks. Furthermore, there is an immediate rise in relative humidity levels post-flush, impacting the air quality in the toilet environment. This study not only advances our understanding of exposure pathways in determining bioaerosol exposure, but also offers pivotal insights for designing targeted interventions to reduce bioaerosol exposure. Recommendations include designing public toilets with antimicrobial surfaces, optimizing ventilation, and initiating timely disinfection protocols to prioritise surfaces closest to the toilet bowl during peak exposure periods, thereby promoting healthier indoor environments and safeguarding public health in high-traffic toilet settings.
Collapse
Affiliation(s)
- Elizabeth N Paddy
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, Leicestershire, UK.
| | - Oluwasola O D Afolabi
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, Leicestershire, UK
| | - M Sohail
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, Leicestershire, UK
| |
Collapse
|
2
|
Murtaza G, Shah SSA, Mumtaz A, Chotana GA, Nafady A, Wahab MA, Sohail M. Efficient Adsorption of Methylene Blue Using a Hierarchically Structured Metal-Organic Framework Derived from Layered Double Hydroxide. ACS Omega 2024; 9:16334-16345. [PMID: 38617612 PMCID: PMC11007713 DOI: 10.1021/acsomega.3c10524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/09/2024] [Accepted: 03/12/2024] [Indexed: 04/16/2024]
Abstract
The growing concerns about environmental pollution, particularly water pollution, are causing an increasing alarm in modern society. One promising approach to address this issue involves engineering existing materials to enhance their effectiveness. A one-step solvothermal reconstruction approach was used to build an eco-friendly two-dimensional (2D) AlNiZn-LDH/BDC MOF composite. The characterizations confirm the formation of a metal-organic framework (MOF) at the layered double hydroxide (LDH) surface. The resulting synthesized material, 2D AlNiZn-LDH/BDC MOF, demonstrated remarkable efficacy in decontaminating methylene blue (MB), a model cationic dye found in water systems. The removal performance of 2D AlNiZn-LDH/BDC MOF was significantly higher than that of pristine 2D AlNiZn-LDH. This improvement shows the potential to increase the adsorption capabilities of nanoporous LDH materials by incorporating organic ligands and integrating meso-/microporosity through MOF formation on their surfaces. Furthermore, their kinetic, isothermal, and thermodynamic studies elucidated the adsorption behavior of this composite material. The results of synthesized MOF showed excellent removal efficiency (92.27%) of 10 ppm of MB aqueous solution as compared to pristine LDH. Additionally, the as-synthesized adsorbent could be regenerated for six successive cycles. This method holds promise for the synthesis of novel and highly effective materials to combat water pollution, laying the groundwork for potential advancements in diverse applications.
Collapse
Affiliation(s)
- Ghulam Murtaza
- Department
of Chemistry, National University of Sciences
and Technology, H-12, Islamabad 44000, Pakistan
| | - Syed Shoaib Ahmad Shah
- Department
of Chemistry, National University of Sciences
and Technology, H-12, Islamabad 44000, Pakistan
| | - Asad Mumtaz
- Department
of Chemistry, National University of Sciences
and Technology, H-12, Islamabad 44000, Pakistan
| | - Ghayoor Abbas Chotana
- Department
of Chemistry and Chemical Engineering, Syed Babar Ali School of Science
and Engineering, Lahore University of Management
Sciences, Lahore 54792, Pakistan
| | - Ayman Nafady
- Chemistry
Department, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Md A. Wahab
- Energy
and Process Engineering Laboratory, School of Mechanical, Medical
and Process Engineering, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Manzar Sohail
- Department
of Chemistry, National University of Sciences
and Technology, H-12, Islamabad 44000, Pakistan
| |
Collapse
|
3
|
Ghaffar RA, Zulfiqar S, Hassan HU, Fadladdin YAJ, Sohail M, Kabir M, Raza MA, Rafiq N, Abdel-Aziz MFA, Garedaghi Y, Hasan I, Arai T. New record of Philometra species from the marine edible fish Terapon jarbua collected from the Sindh, Arabian Sea, Pakistan. BRAZ J BIOL 2024; 84:e281415. [PMID: 38511782 DOI: 10.1590/1519-6984.281415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/15/2024] [Indexed: 03/22/2024] Open
Abstract
Diseases in fish due to helminth parasites, especially Philometra species, are the primary worry in aquaculture. Philometra are responsible for health problem in fishes they directly affect fish growth and population parameters. A comprehensive survey was conducted involving the examination of the marine fish species Terapon jarbua, gathered from the coastal waters of Sindh, Pakistan In this research different Philometra species from marine fish Terapon jarbua during 2021 and 2022. Philometra nematodes, belonging to the family Philometridae, are common parasitic organisms inhabiting both marine and freshwater environments. Their prevalence, particularly when existing in high numbers within host organisms, can lead to severe and potentially lethal consequences. Employing light microscopy techniques, diverse species of Philometra were identified, including Philometra teraponi, P. jarbuai, P. arabiai, P. karachii, and P. awarii, localized primarily within the ovaries of the host fish. A total of 140 fish samples were examined and 76 were infected. The intensity of infected fish was 54.28%. The identification process encompassed meticulous analysis of crucial parameters, such as body size, esophagus length, positioning of the nerve ring, dimensions of the ventriculus, and ligament size. Intriguingly, the parasites were found in varying contexts; while some were free within the ovaries, others were embedded within tissues, inducing severe muscular dystrophy. This research presents novel findings of Philometra nematodes in the marine waters of Pakistan, extending their host and geographical distribution records. Future studies are needed to better evaluate and describe the dynamics and the epidemiology of Philometra infection in wild and cultured fish species.
Collapse
Affiliation(s)
- R A Ghaffar
- University of Karachi, Department of Zoology, Karachi, Pakistan
| | - S Zulfiqar
- University of Karachi, Department of Zoology, Karachi, Pakistan
| | - H Ul Hassan
- University of Karachi, Department of Zoology, Karachi, Pakistan
- Government of Pakistan, Ministry of National Food Security and Research, Fisheries Development Board, Islamabad, Pakistan
| | - Y A J Fadladdin
- King Abdulaziz University, Faculty of Sciences, Department of Biological Sciences, Jeddah, Saudi Arabia
| | - M Sohail
- Government Postgraduate College Sahiwal, Department of Biology, Sahiwal, Pakistan
| | - M Kabir
- Thal University Bhakkar (University of Sargodha, Ex-Sub-Campus Bhakkar), Department of Biological Sciences, Bhakkar, Punjab, Pakistan
| | - M A Raza
- Government Postgraduate College Satellite Town, Department of Biology, Gujranwala, Pakistan
| | - N Rafiq
- Abdul Wali Khan University Mardan, Department of Zoology, Khyber Pakhtunkhwa, Pakistan
| | - M F A Abdel-Aziz
- Arish University, Faculty of Aquaculture and Marine Fisheries, Department of Aquaculture and Biotechnology, Al-Arish , Egypt
| | - Y Garedaghi
- Islamic Azad University Tabriz Branch, Faculty of Veterinary Medicine, Department of Parasitology, Tabriz Medical Sciences, Tabriz, Iran
| | - I Hasan
- University of Insubria, Department of Biotechnology and Life Sciences, Varese, Italy
| | - T Arai
- Universiti Brunei Darussalam, Faculty of Science, Environmental and Life Sciences Programme, Gadong, Brunei
| |
Collapse
|
4
|
Tabassum J, Baig N, Sohail M, Nafady A, Shah SSA, Ul-Hamid A, Tsiakaras P. Novel and efficient Bi-doped CoTe nano-solar evaporators embedded on leno weave cotton gauze for efficient solar-driven desalination. J Colloid Interface Sci 2024; 658:758-771. [PMID: 38150932 DOI: 10.1016/j.jcis.2023.12.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 12/11/2023] [Accepted: 12/13/2023] [Indexed: 12/29/2023]
Abstract
Solar-driven desalination is considered an alternative to the conventional desalination due to its nearly zero carbon footprint and ease of operating in remote areas. Water can be purified wherever sunlight is available, providing a viable solution to water shortage. Metal chalcogenide-based materials are revolutionary for solar evaporators due to their excellent photothermal conversion efficiency, facile synthesis methods, stability, and low cost. Herein we present a prototype Bi-doped CoTe nano-solar evaporator embedded on leno weave cotton gauze (Bi/CoTe@CG) using the sonication process. The nano-solar evaporator was synthesized using a simple hydrothermal approach to provide an opportunity to scale up. The as designed solar evaporator consisting of 5 % Bi/CoTe@CG showed an excellent water flux of 2.38 kg m-2 h-1 upon one sun radiation (1 kW m-2), considered among the highest literature-reported values. The introduced solar evaporator showed excellent solar efficiency of 96.7 %, good stability, and reusability for five cycles of one hour. The best doping ratio of Bi in CoTe was obtained as Bi0.5Co9.5Te with a contact angle of 11.9° in powder form. The hydrophilic nature of the designed solar-evaporator increased the water interaction with the embedded nano-solar evaporator, which helps the transfer of the heat to nearby water molecules, break their hydrogen bonding and increase the evaporation rate. The ion concentration, of the desalinated pure water collected using Bi/CoTe@CG, decreased by many orders of magnitude and it is far below the limit of WHO standards for Na+ and K+. Thus, a self-floating Bi-doped CoTe nano-solar evaporator deposited on cotton gauze (CG) is an excellent solar evaporator for seawater desalination. The proposed solar evaporator is another step towards introducing environmentally friendly desalination methods.
Collapse
Affiliation(s)
- Javeria Tabassum
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad 44000, Pakistan
| | - Nadeem Baig
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad 44000, Pakistan.
| | - Ayman Nafady
- Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Syed Shoaib Ahmad Shah
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad 44000, Pakistan
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Panagiotis Tsiakaras
- Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, 38834 Volos, Greece.
| |
Collapse
|
5
|
Shah SSA, Sohail M, Murtza G, Waseem A, Rehman AU, Hussain I, Bashir MS, Alarfaji SS, Hassan AM, Nazir MA, Javed MS, Najam T. Recent trends in wastewater treatment by using metal-organic frameworks (MOFs) and their composites: A critical view-point. Chemosphere 2024; 349:140729. [PMID: 37989439 DOI: 10.1016/j.chemosphere.2023.140729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/26/2023] [Accepted: 11/13/2023] [Indexed: 11/23/2023]
Abstract
Respecting the basic need of clean and safe water on earth for every individual, it is necessary to take auspicious steps for waste-water treatment. Recently, metal-organic frameworks (MOFs) are considered as promising material because of their intrinsic features including the porosity and high surface area. Further, structural tunability of MOFs by following the principles of reticular chemistry, the MOFs can be functionalized for the high adsorption performance as well as adsorptive removal of target materials. However, there are still some major concerns associated with MOFs limiting their commercialization as promising adsorbents for waste-water treatment. The cost, toxicity and regenerability are the major issues to be addressed for MOFs to get insightful results. In this article, we have concise the current strategies to enhance the adsorption capacity of MOFs during the water-treatment for the removal of toxic dyes, pharmaceuticals, and heavy metals. Further, we have also discussed the role of metallic nodes, linkers and associated functional groups for effective removal of toxic water pollutants. In addition to conformist overview, we have critically analyzed the MOFs as adsorbents in terms of toxicity, cost and regenerability. These factors are utmost important to address before commercialization of MOFs as adsorbents for water-treatment. Finally, some future perspectives are discussed to give directions for potential research.
Collapse
Affiliation(s)
- Syed Shoaib Ahmad Shah
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Ghulam Murtza
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Amir Waseem
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
| | - Aziz Ur Rehman
- Institute of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Iftikhar Hussain
- Department of Mechanical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong
| | - Muhammad Sohail Bashir
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, Anhui, 230601, China
| | - Saleh S Alarfaji
- Department of Chemistry, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia
| | - Ahmed M Hassan
- Faculty of Engineering and Technology, Future University in Egypt, New Cairo, 11835, Egypt
| | - Muhammad Altaf Nazir
- Institute of Chemistry, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan.
| | - Muhammad Sufyan Javed
- School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China.
| | - Tayyaba Najam
- College of Chemistry and Environmental Sciences, Shenzhen University, Shenzhen, 518060, Guangdong, China.
| |
Collapse
|
6
|
Tahir N, Altaf A, Baig N, Nafady A, Ul-Hamid A, Shah SSA, Tsiakaras P, Sohail M. Engineering Mn-Doped CdS Thin Films Through Chemical Bath Deposition for High-Performance Photoelectrochemical Water Splitting. Chem Asian J 2024:e202301100. [PMID: 38275189 DOI: 10.1002/asia.202301100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/23/2024] [Accepted: 01/24/2024] [Indexed: 01/27/2024]
Abstract
Doping conventional materials with a second element is an exciting strategy for enhancing catalytic performance via electronic structure modifications. Herein, Mn-doped CdS thin films were successfully synthesized with the aid of the chemical bath deposition (CBD) by varying the pH value (8, 10, and 12) and the surfactant amount (20, 40, 60 mg). Different morphologies like nano-cubes, nanoflakes, nano-worms, and nanosheets were obtained under different deposition conditions. The optimized Mn-doped CdS synthesized at pH=8 exhibited better photoelectrochemical (PEC) performance for oxygen evolution reaction (OER) than pure CdS films, with a maximum photocurrent density of 300 μA/cm2 at an external potential of 0.5 V, under sunlight illumination. The observed performance is attributed to the successful Mn doping, porosity, high surface area, and nanosphere morphology.
Collapse
Affiliation(s)
- Nimrah Tahir
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Amna Altaf
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Nadeem Baig
- Interdisciplinary Research Centre for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Ayman Nafady
- Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Syed Shoaib Ahmad Shah
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Panagiotis Tsiakaras
- Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, 38834, Volos, Greece
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| |
Collapse
|
7
|
Hassan A, Komal Zafar H, Shahid Ashraf R, Arfan M, Rezaul Karim M, Wahab MA, Sohail M. Ferrocene-Boosted Nickel Sulfide Nanoarchitecture for Enhanced Alkaline Water Splitting. Chem Asian J 2024:e202301051. [PMID: 38216532 DOI: 10.1002/asia.202301051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 01/10/2024] [Accepted: 01/12/2024] [Indexed: 01/14/2024]
Abstract
Enhanced electrocatalysts that are cost-effective, durable, and derived from abundant resources are imperative for developing efficient and sustainable electrochemical water-splitting systems to produce hydrogen. Therefore, the design and development of non-noble-based catalysts with more environmentally sustainable alternatives in efficient alkaline electrolyzers are important. This work reports ferrocene (Fc)-incorporated nickel sulfide nanostructured electrocatalysts (Fc-NiS) using a one-step facile solvothermal method for water-splitting reactions. Fc-NiS exhibited exceptional electrocatalytic activity under highly alkaline conditions, evident from its peak current density of 345 mA cm-2 , surpassing the 153 mA cm-2 achieved by the pristine nickel sulfide (NiS) catalysts. Introducing ferrocene enhances electrical conductivity and facilitates charge transfer during water-splitting reactions, owing to the inclusion of iron metal. Fc-NiS exhibits a very small overpotential of 290 mV at 10 mA cm-2 and a Tafel slope of 50.46 mV dec-1 , indicating its superior charge transfer characteristics for the three-electron transfer process involved in water splitting. This outstanding electrocatalytic performance is due to the synergistic effects embedded within the nanoscale architecture of Fc-NiS. Furthermore, the Fc-NiS catalyst also shows a stable response for the water-splitting reactions. It maintains a steady current density with an 87% retention rate for 25 hours of continuous operation, indicating its robustness and potential for prolonged electrolysis processes.
Collapse
Affiliation(s)
- Abeera Hassan
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Hafiza Komal Zafar
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Raja Shahid Ashraf
- Department of Chemistry, Government College University, Katchery Road, Lahore, 54000, Pakistan
| | - Muhammad Arfan
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Mohammad Rezaul Karim
- Department of Mechanical Engineering, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - Md A Wahab
- Energy and Process Engineering Laboratory, School of Mechanical, Medical, and Process Engineering, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD, 4000, Australia
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| |
Collapse
|
8
|
Shoaib Ahmad Shah S, Altaf Nazir M, Mahmood A, Sohail M, Ur Rehman A, Khurram Tufail M, Najam T, Sufyan Javed M, Eldin SM, Rezaur Rahman M, Rahman MM. Synthesis of Electrical Conductive Metal-Organic Frameworks for Electrochemical Applications. CHEM REC 2024; 24:e202300141. [PMID: 37724006 DOI: 10.1002/tcr.202300141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 08/29/2023] [Indexed: 09/20/2023]
Abstract
Electrical conductivity is very important property of nanomaterials for using wide range of applications especially energy applications. Metal-organic frameworks (MOFs) are notorious for their low electrical conductivity and less considered for usage in pristine forms. However, the advantages of high surface area, porosity and confined catalytic active sites motivated researchers to improve the conductivity of MOFs. Therefore, 2D electrical conductive MOFs (ECMOF) have been widely synthesized by developing the effective synthetic strategies. In this article, we have summarized the recent trends in developing the 2D ECMOFs, following the summary of potential applications in the various fields with future perspectives.
Collapse
Affiliation(s)
- Syed Shoaib Ahmad Shah
- Department of Chemistry, School of natural sciences, National University of sciences and technology, 44000, Islamabad, Pakistan
| | - Muhammad Altaf Nazir
- Institute of Chemistry, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Azhar Mahmood
- Department of Chemistry, School of natural sciences, National University of sciences and technology, 44000, Islamabad, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of natural sciences, National University of sciences and technology, 44000, Islamabad, Pakistan
| | - Aziz Ur Rehman
- Institute of Chemistry, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | | | - Tayyaba Najam
- Institute of Chemistry, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Muhammad Sufyan Javed
- School of Physical Sciences and Technology, Lanzhou University, 730000, Lanzhou, China
| | - Sayed M Eldin
- Faculty of Engineering and Technology, Future University in Egypt, New Cairo, 11835, Egypt
| | - Md Rezaur Rahman
- Department of Chemical Engineering and Energy Sustainability, Faculty of Engineering, Universiti Malaysia Sarawak, 94300, Kota Samarahan, Sarawak, Malaysia
| | - Mohammed M Rahman
- Center of Excellence for Advanced Materials Research (CEAMR) &, Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| |
Collapse
|
9
|
Komal Zafar H, Zainab S, Masood M, Sohail M, Shoaib Ahmad Shah S, Karim MR, O'Mullane A, Ostrikov KK, Will G, Wahab MA. Recent Advances on Nitrogen-Doped Porous Carbons Towards Electrochemical Supercapacitor Applications. CHEM REC 2024; 24:e202300161. [PMID: 37582638 DOI: 10.1002/tcr.202300161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 07/19/2023] [Indexed: 08/17/2023]
Abstract
Due to ever-increasing global energy demands and dwindling resources, there is a growing need to develop materials that can fulfil the World's pressing energy requirements. Electrochemical energy storage devices have gained significant interest due to their exceptional storage properties, where the electrode material is a crucial determinant of device performance. Hence, it is essential to develop 3-D hierarchical materials at low cost with precisely controlled porosity and composition to achieve high energy storage capabilities. After presenting the brief updates on porous carbons (PCs), then this review will focus on the nitrogen (N) doped porous carbon materials (NPC) for electrochemical supercapacitors as the NPCs play a vital role in supercapacitor applications in the field of energy storage. Therefore, this review highlights recent advances in NPCs, including developments in the synthesis of NPCs that have created new methods for controlling their morphology, composition, and pore structure, which can significantly enhance their electrochemical performance. The investigated N-doped materials a wide range of specific surface areas, ranging from 181.5 to 3709 m2 g-1 , signifies a substantial increase in the available electrochemically active surface area, which is crucial for efficient energy storage. Moreover, these materials display notable specific capacitance values, ranging from 58.7 to 754.4 F g-1 , highlighting their remarkable capability to effectively store electrical energy. The outstanding electrochemical performance of these materials is attributed to the synergy between heteroatoms, particularly N, and the carbon framework in N-doped porous carbons. This synergy brings about several beneficial effects including, enhanced pseudo-capacitance, improved electrical conductivity, and increased electrochemically active surface area. As a result, these materials emerge as promising candidates for high-performance supercapacitor electrodes. The challenges and outlook in NPCs for supercapacitor applications are also presented. Overall, this review will provide valuable insights for researchers in electrochemical energy storage and offers a basis for fabricating highly effective and feasible supercapacitor electrodes.
Collapse
Affiliation(s)
- Hafiza Komal Zafar
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Sara Zainab
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Maria Masood
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Syed Shoaib Ahmad Shah
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad, 44000, Pakistan
| | - Mohammad R Karim
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), College of Engineering, King Saud University, P. O. Box 800, Riyadh, 11421, Saudi Arabia
- K.A. CARE Energy Research and Innovation Center, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Anthony O'Mullane
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry and Physics and Centre for Materials Science, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Geoffrey Will
- Energy and Process Engineering Laboratory, School of Mechanical, Medical and Process Engineering, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Md A Wahab
- Energy and Process Engineering Laboratory, School of Mechanical, Medical and Process Engineering, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| |
Collapse
|
10
|
Hassan HU, Mawa Z, Ahmad N, Zulfiqar T, Sohail M, Ahmad H, Yaqoob H, Bilal M, Rahman MA, Ullah N, Hossain MY, Habib A, Arai T. Size at sexual maturity estimation for 36 species captured by bottom and mid-water trawls from the marine habitat of Balochistan and Sindh in the Arabian Sea, Pakistan, using maximum length (Lmax) and logistic (L50) models. BRAZ J BIOL 2024; 84:e262603. [DOI: 10.1590/1519-6984.262603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 06/16/2022] [Indexed: 11/21/2022] Open
Abstract
Abstract The aim of this study was to estimate the size at first sexual maturity (Lm) for 36 species belonging to 24 families from the marine habitat of Balochistan and Sindh in Arabian Sea, Pakistan through maximum length based an empirical and logistic model using commercial catch during June 2020 to May 2021. Individual total length (TL) was noted up to 0.1 cm using measuring broad. The Lm was calculated using two formulae; (i) log (Lm) = - 0.1246 + 0.9924 * log (Lmax) for Elasmobranchs and (ii) log (Lm) = -0.1189 + 0.9157* log (Lmax) for ray-finned fishes. The minimum Lm was recorded as 10.27 cm TL for Caranx malabaricus and 108.38 cm TL for Isurus oxyrinchus, respectively. Around Lm with 58.33% species were ranges from 19.00 cm to 25.00 cm TL. This study was estimated 16 newly Lm which is globally absent and rest 20 Lm are absent in the Arabian Sea (Pakistan coastal habitats). Therefore, the results will be helpful for the sustainable management and conservation of these marine fishes through the establishment of mesh size of trawl nets based on the size at sexual maturity (Lm).
Collapse
Affiliation(s)
- H. U. Hassan
- University of Karachi, Pakistan; Ministry of National Food Security and Research Fisheries, Pakistan
| | - Z. Mawa
- University of Rajshahi, Bangladesh
| | | | | | - M. Sohail
- Government Postgraduate College Sahiwal, Pakistan
| | | | | | - M. Bilal
- Government College University Lahore, Pakistan
| | | | - N. Ullah
- University of Malakand, Pakistan
| | | | - A. Habib
- Universiti Malaysia Terengganu, Malaysia
| | - T. Arai
- Universiti Brunei Darussalam, Brunei Darussalam
| |
Collapse
|
11
|
Khurram Tufail M, Ahmed A, Rafiq M, Asif Nawaz M, Shoaib Ahmad Shah S, Sohail M, Sufyan Javed M, Najam T, Althomali RH, Rahman MM. Chemistry Aspects and Designing Strategies of Flexible Materials for High-Performance Flexible Lithium-Ion Batteries. CHEM REC 2024; 24:e202300155. [PMID: 37435960 DOI: 10.1002/tcr.202300155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/15/2023] [Indexed: 07/13/2023]
Abstract
In recent years, flexible and wearable electronics such as smart cards, smart fabrics, bio-sensors, soft robotics, and internet-linked electronics have impacted our lives. In order to meet the requirements of more flexible and adaptable paradigm shifts, wearable products may need to be seamlessly integrated. A great deal of effort has been made in the last two decades to develop flexible lithium-ion batteries (FLIBs). The selection of suitable flexible materials is important for the development of flexible electrolytes self-supported and supported electrodes. This review is focused on the critical discussion of the factors that evaluate the flexibility of the materials and their potential path toward achieving the FLIBs. Following this analysis, we present how to evaluate the flexibility of the battery materials and FLIBs. We describe the chemistry of carbon-based materials, covalent-organic frameworks (COFs), metal-organic frameworks (MOFs), and MXene-based materials and their flexible cell design that represented excellent electrochemical performances during bending. Furthermore, the application of state-of-the-art solid polymer and solid electrolytes to accelerate the development of FLIBs is introduced. Analyzing the contributions and developments of different countries has also been highlighted in the past decade. In addition, the prospects and potential of flexible materials and their engineering are also discussed, providing the roadmap for further developments in this fast-evolving field of FLIB research.
Collapse
Affiliation(s)
- Muhammad Khurram Tufail
- College of Materials Science and Engineering, College of Physics, Qingdao University, Qingdao, 266071, P. R. China
| | - Adeel Ahmed
- College of Materials Science and Engineering, College of Physics, Qingdao University, Qingdao, 266071, P. R. China
| | - Muhammad Rafiq
- College of Materials Science and Engineering, College of Physics, Qingdao University, Qingdao, 266071, P. R. China
| | | | - Syed Shoaib Ahmad Shah
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | | | - Tayyaba Najam
- Institute of Chemistry, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Raed H Althomali
- Department of Chemistry, College of Art and Science, Prince Sattam bin Abdulaziz University, Wadi Al-Dawasir, 11991, Saudi Arabia
| | - Mohammed M Rahman
- Center of Excellence for Advanced Materials Research (CEAMR) & Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| |
Collapse
|
12
|
Altaf A, Sohail M, Altaf M, Nafady A, Sher M, Wahab MA. Enhanced Electrocatalytic Activity of Amorphized LaCoO 3 for Oxygen Evolution Reaction. Chem Asian J 2023:e202300870. [PMID: 37943100 DOI: 10.1002/asia.202300870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 11/05/2023] [Accepted: 11/05/2023] [Indexed: 11/10/2023]
Abstract
Amorphous inorganic perovskites have attracted significant attention as efficient electrocatalysts due to their unique structural flexibility and good catalytic activity. In particular, the disordered structure and a surface rich in defects such as oxygen vacancies can contribute to the superior electrocatalytic activity of amorphous oxides compared to their crystalline counterpart. In this work, we report the synthesis of LaCoO3 , followed by an amorphization process through urea reduction with tailored modifications. The as-synthesized catalysts were thoroughly tested for their performance in oxygen evolution reaction (OER), Remarkably, the amorphous LaCoO3 synthesized at 450 °C (referred to as LCO-4) exhibits excellent OER catalytic activity. At an overpotential of 310 mV, it achieved a current density of 10 mA/cm-2 , exceedingly fast to 1 A/cm-2 at an overpotential of only 460 mV. Moreover, LCO-4 exhibited several advantageous features compared to pristine LaCoO3 and LaCoO3 amorphized at other two temperatures (350 °C, LCO-3, and 550 °C, LCO-5). The amorphized LCO-4 catalyst showed a higher electrochemically active surface area, a key factor in boosting catalytic performance. Additionally, LCO-4 demonstrated the lowest Tafel slope of 70 mVdec-1 , further highlighting its exceptional OER activity. Furthermore, the long-term stability of LCO-4 is notably superior than pristine LaCoO3 (LCO-P) and the other amorphized samples (LCO-3 and LCO-5). The enhanced catalytic activity of LCO-4 can be attributed to its unique disordered structure, small crystallite size, and higher concentration of oxygen vacancies in the final catalyst.
Collapse
Affiliation(s)
- Amna Altaf
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Muhammad Altaf
- Department of Chemistry, Government College University, Lahore, 54000, Pakistan
| | - Ayman Nafady
- Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Muhammad Sher
- Department of Chemistry, Allama Iqbal Open University, H-8, Islamabad, 44000, Pakistan
| | - Md A Wahab
- Energy and Process Engineering Laboratory, School of Mechanical, Medical and Process Engineering, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD, 4000, Australia
| |
Collapse
|
13
|
Fiaz M, Sohail M, Nafady A, Will G, Wahab MA. A facile two-step hydrothermal preparation of 2D/2D heterostructure of Bi 2WO 6/WS 2 for the efficient photodegradation of methylene blue under sunlight. Environ Res 2023; 234:116550. [PMID: 37437862 DOI: 10.1016/j.envres.2023.116550] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/26/2023] [Accepted: 07/02/2023] [Indexed: 07/14/2023]
Abstract
A facile two-step hydrothermal method was successfully used to prepare a photocatalyst Bi2WO6/WS2 heterojunction for methyl blue (MB) photodegradation. Fabricated photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray analysis (EDX), and X-ray photoelectron spectroscopy (XPS). Band gap measurements were carried out by diffuse reflectance spectroscopy (DRS). Results indicated that the prepared heterostructure photocatalyst has increased visible light absorption. Photocatalytic performance was evaluated under sunlight irradiation for methylene blue (MB) degradation as a model dye. Variations in pH (4-10), amount of catalyst (0.025-0.1 g/L), and initial MB concentrations (5-20 ppm) were carried out, whereas all prepared catalysts were used to conduct the tests with a visible spectrophotometer. Degradation activity improved with the pH increase; the optimum pH was approximately 8. Catalyst concentration is directly related to degradation efficiency and reached 93.56% with 0.075 g of the catalyst. Among tested catalysts, 0.01 Bi2WO6/WS2 has exhibited the highest activity and a degradation efficiency of 99.0% in 40 min (min) for MB. MB photodegradation follows pseudo-first-order kinetics, and obtained values of kapp were 0.0482 min-1, 0.0337 min-1, 0.0205 min-1, and 0.0087 min-1 for initial concentrations of 5 ppm, 10 ppm, 15 ppm, and 20 ppm, respectively. The catalyst was reused for six cycles with a negligible decrease in the degradation activity. Heterostructure 0.01 Bi2WO6/WS2 has exhibited a photocurrent density of 16 μA cm-2, significantly higher than 2.0 and 4.5 μA cm-2 for the pristine WS2 and Bi2WO6, respectively. The findings from these investigations may serve as a crucial stepping stone towards the remediation of polluted water facilitated by implementing such highly efficient photocatalysts.
Collapse
Affiliation(s)
- Muhammad Fiaz
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, 44000, Pakistan.
| | - Ayman Nafady
- Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Geoffrey Will
- Energy and Process Engineering Laboratory, School of Mechanical, Medical and Process Engineering, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia
| | - Md A Wahab
- Energy and Process Engineering Laboratory, School of Mechanical, Medical and Process Engineering, Faculty of Science, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD 4000, Australia.
| |
Collapse
|
14
|
Bilal M, Altaf A, Bint-E-Khalid E, Zafar HK, Tahir N, Nafady A, Wahab MA, Shah SSA, Najam T, Sohail M. NiCo 2O 4 nano-needles as an efficient electro-catalyst for simultaneous water splitting and dye degradation. RSC Adv 2023; 13:23547-23557. [PMID: 37555091 PMCID: PMC10404933 DOI: 10.1039/d3ra03012a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 07/11/2023] [Indexed: 08/10/2023] Open
Abstract
Developing an efficient and non-precious bifunctional catalyst capable of performing water splitting and organic effluent degradation in wastewater is a great challenge. This article reports an efficient bifunctional nanocatalyst based on NiCo2O4, synthesized using a simple one-pot co-precipitation method. We optimized the synthesis conditions by varying the synthesis pH and sodium dodecyl sulfate (SDS) concentrations. The prepared catalyst exhibited excellent catalytic activity for the electrochemical oxygen evolution reaction (OER) and simultaneous methylene blue (MB) dye degradation. Among the catalysts, the catalyst synthesized using 1 g SDS as a surfactant at 100 °C provided the highest current density (658 mA cm-2), lower onset potential (1.34 V vs. RHE), lower overpotential (170 mV @ 10 mA cm-2), and smallest Tafel slope (90 mV dec-1) value. Furthermore, the OH˙ radicals produced during the OER electrochemically degraded the MB to 90% within 2 hours. The stability test conducted at 20 mA cm-2 showed almost negligible loss of the electrochemical response for OER, with 99% retention of the original response. These results strongly suggest that this catalyst is a promising candidate for addressing the challenges of wastewater treatment and energy generation.
Collapse
Affiliation(s)
- Muhammad Bilal
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology Islamabad 44000 Pakistan
| | - Amna Altaf
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology Islamabad 44000 Pakistan
| | - Ehmen Bint-E-Khalid
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology Islamabad 44000 Pakistan
| | - Hafiza Komal Zafar
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology Islamabad 44000 Pakistan
| | - Nimrah Tahir
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology Islamabad 44000 Pakistan
| | - Ayman Nafady
- Chemistry Department, College of Science, King Saud University Riyadh 11451 Saudi Arabia
| | - Md A Wahab
- Energy and Process Engineering Laboratory, School of Mechanical, Medical and Process Engineering, Faculty of Science, Queensland University of Technology (QUT) 2 George Street Brisbane QLD 4000 Australia
| | - Syed Shoaib Ahmad Shah
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology Islamabad 44000 Pakistan
| | - Tayyaba Najam
- Institute of Chemistry, The Islamia University of Bahawalpur 63100 Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology Islamabad 44000 Pakistan
| |
Collapse
|
15
|
Komal N, Mansoor MA, Mazhar M, Sohail M, Malik Z, Anis-ur-Rehman M. Effect of (Sm, In) Doping on the Electrical and Thermal Properties of Sb 2Te 3 Microstructures. ACS Omega 2023; 8:9797-9806. [PMID: 36969434 PMCID: PMC10034840 DOI: 10.1021/acsomega.2c05859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 12/09/2022] [Indexed: 06/18/2023]
Abstract
Doped Sb2Te3 narrow-band-gap semiconductors have been attracting considerable attention for different electronic and thermoelectric applications. Trivalent samarium (Sm)- and indium (In)-doped Sb2Te3 microstructures have been synthesized by the economical solvothermal method. Powder X-ray diffraction (PXRD) was used to verify the synthesis of single-phase doped and undoped Sb2Te3 and doping of Sm and In within the crystal lattice of Sb2Te3. Further, the morphology, structure elucidation, and stability have been investigated systematically by scanning electron microscopy (SEM), Raman analysis, and thermogravimetric analysis (TGA). These analyses verified the successful synthesis of hexagonal undoped Sb2Te3 (AT) and (Sm, In)-doped Sb2Te3 (SAT, IAT) microstructures. Moreover, the comparison of dielectric parameters, including dielectric constant, dielectric loss, and tan loss of AT, SAT, and IAT, was done in detail. An increment in the electrical conductivities, both AC and DC, from 1.92 × 10-4 to 4.9 × 10-3 Ω-1 m-1 and a decrease in thermal conductivity (0.68-0.60 W m-1 K-1) were observed due to the doping by trivalent (Sm, In) dopants. According to our best knowledge, the synthesis and dielectric properties of (Sm, In)-doped and undoped Sb2Te3 in comparison with their electrical properties and thermal conductivity have not been reported earlier. This implies that appropriate doping with (Sm, In) in Sb2Te3 is promising to enhance the electronic and thermoelectric behavior.
Collapse
Affiliation(s)
- Nitasha Komal
- Department
of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad44000, Pakistan
| | - Muhammad Adil Mansoor
- Department
of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad44000, Pakistan
| | - Muhammad Mazhar
- Department
of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad44000, Pakistan
| | - Manzar Sohail
- Department
of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad44000, Pakistan
| | - Zahida Malik
- Department
of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), H-12, Islamabad44000, Pakistan
| | - Muhammad Anis-ur-Rehman
- Applied
Thermal Physics Laboratory, Department of Physics, COMSATS University Islamabad, Islamabad44000, Pakistan
| |
Collapse
|
16
|
Paddy EN, Afolabi OOD, Sohail M. Toilet plume bioaerosols in health care and hospitality settings: A systematic review. Am J Infect Control 2023; 51:324-333. [PMID: 35870658 DOI: 10.1016/j.ajic.2022.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 07/07/2022] [Accepted: 07/08/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND The spread of some respiratory and gastro-intestinal infections has been linked to the exposure to infectious bioaerosols released after toilet flushing. This represents a health hazard and infection risk for immunocompromised patients, health workers and the public, particularly within the health care and hospitality settings. This systematic review provides current knowledge and identifies gaps in the evidence regarding toilet plume bioaerosols and the potential contributory role in spreading infections in health care and hospitality settings. METHODS The PRISMA guidelines were used. Searches were run in PubMed, Scopus, and Google Scholar from 1950 to 30th June 2021. Searches of global and regional reports and updates from relevant international and governmental organizations were also conducted. RESULTS AND CONCLUSION The search yielded 712 results, and 37 studies were finally selected for this review. There is a lack of national and international bioaerosol sampling and exposure standards for health care and hospitality settings. Toilet plume bioaerosols are complex in nature, thus, measured bioaerosol concentrations in these settings depend on many variables and may differ for every pathogen responsible for a particular infectious disease. The contact and airborne transmission risks posed by toilet plume bioaerosols also remain unquantified. They are an important pathway that can increase the exposure to enteric and airborne pathogens. Hence, quantitative risk assessment and related research are needed to investigate these transmission risks.
Collapse
Affiliation(s)
- Elizabeth N Paddy
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, Leicestershire, United Kingdom.
| | - Oluwasola O D Afolabi
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, Leicestershire, United Kingdom
| | - M Sohail
- School of Architecture, Building and Civil Engineering, Loughborough University, Loughborough, Leicestershire, United Kingdom
| |
Collapse
|
17
|
Shah SSA, Khan NA, Imran M, Rashid M, Tufail MK, Rehman AU, Balkourani G, Sohail M, Najam T, Tsiakaras P. Recent Advances in Transition Metal Tellurides (TMTs) and Phosphides (TMPs) for Hydrogen Evolution Electrocatalysis. Membranes (Basel) 2023; 13:113. [PMID: 36676920 PMCID: PMC9863077 DOI: 10.3390/membranes13010113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/03/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
The hydrogen evolution reaction (HER) is a developing and promising technology to deliver clean energy using renewable sources. Presently, electrocatalytic water (H2O) splitting is one of the low-cost, affordable, and reliable industrial-scale effective hydrogen (H2) production methods. Nevertheless, the most active platinum (Pt) metal-based catalysts for the HER are subject to high cost and substandard stability. Therefore, a highly efficient, low-cost, and stable HER electrocatalyst is urgently desired to substitute Pt-based catalysts. Due to their low cost, outstanding stability, low overpotential, strong electronic interactions, excellent conductivity, more active sites, and abundance, transition metal tellurides (TMTs) and transition metal phosphides (TMPs) have emerged as promising electrocatalysts. This brief review focuses on the progress made over the past decade in the use of TMTs and TMPs for efficient green hydrogen production. Combining experimental and theoretical results, a detailed summary of their development is described. This review article aspires to provide the state-of-the-art guidelines and strategies for the design and development of new highly performing electrocatalysts for the upcoming energy conversion and storage electrochemical technologies.
Collapse
Affiliation(s)
- Syed Shoaib Ahmad Shah
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan
| | - Naseem Ahmad Khan
- Institute of Chemistry, the Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Muhammad Imran
- Institute of Chemistry, the Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Muhammad Rashid
- Institute of Chemistry, the Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | | | - Aziz ur Rehman
- Institute of Chemistry, the Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Georgia Balkourani
- Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, 38834 Volos, Greece
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan
| | - Tayyaba Najam
- Institute of Chemistry, the Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Panagiotis Tsiakaras
- Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, 38834 Volos, Greece
- Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes, Institute of High Temperature Electrochemistry, RAS, 20 Akademicheskaya Str., Yekaterinburg 620990, Russia
- Laboratory of Materials and Devices for Electrochemical Power Engineering, Institute of Chemical Engineering, Ural Federal University, 19 Mira Str., Yekaterinburg 620002, Russia
| |
Collapse
|
18
|
Sim SK, Myo N, Sohail M. Team-based self-directed learning enhanced students' learning experience in undergraduate surgical teaching. Med J Malaysia 2023; 78:61-67. [PMID: 36715193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
INTRODUCTION To evaluate the effectiveness of team-based self-directed learning (SDL) in the teaching of the undergraduate Year 5 surgical posting. MATERIALS AND METHODS A quasi-experimental study was conducted to develop and administer a team-based SDL versus a conventional SDL to teach undergraduate surgical topics. One hundred and seventy-four medical students who underwent the Year 5 surgical posting were recruited. They were assigned to two groups receiving either the teambased SDL or the conventional SDL. Pre- and post-SDL assessments were conducted to determine students' understanding of selected surgical topics. A selfadministered questionnaire was used to collect student feedback on the team-based SDL. RESULTS The team-based SDL group scored significantly higher than the conventional SDL group in the post-SDL assessment (74.70 ± 6.81 vs. 63.77 ± 4.18, t = -12.72, p < 0.01). The students agreed that the team-based SDL method facilitated their learning process. CONCLUSION The study demonstrated that the use of a teambased SDL is an effective learning strategy for teaching the Year 5 surgical posting. This method encouraged peer discussion and promoted teamwork in completing task assignments to achieve the learning objectives.
Collapse
Affiliation(s)
- S K Sim
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Department of Surgery, Kota Samarahan, Sarawak, Malaysia.
| | - N Myo
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Department of Surgery, Kota Samarahan, Sarawak, Malaysia
| | - M Sohail
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Department of Surgery, Kota Samarahan, Sarawak, Malaysia
| |
Collapse
|
19
|
Sharif MN, Taufiq S, Sohail M, Abbas SR. Tuberculosis detection from raw sputum samples using Au-electroplated screen-printed electrodes as E-DNA sensor. Front Chem 2022; 10:1046930. [DOI: 10.3389/fchem.2022.1046930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 10/31/2022] [Indexed: 11/22/2022] Open
Abstract
Tuberculosis (TB) remains a leading cause of death globally, especially in underdeveloped nations. The main impediment to TB eradication is a lack of efficient diagnostic tools for disease diagnosis. In this work, label free and ultrasensitive electrochemical DNA biosensor for detecting Mycobacterium tuberculosis has been developed based on the electrodeposition of gold nanoparticles on the surface of carbon screen-printed carbon electrode (Zensors) for signal amplification. Particularly, screen-printed electrodes were modified by electrochemical deposition of Au to enhance the conductivity and facilitate the immobilization of ssDNA probes via Au-S bonds. The electrochemically modified SPEs were characterized using Scanning electron microscopy/Energy Dispersive X-Ray Analysis (SEM/EDX) and X-Ray Diffraction (XRD). Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques were used to investigate the DNA hybridization between single-stranded (ssDNA) probe and target DNA (tDNA). Under the ideal conditions, DPV exhibited a correlation coefficient R2 = 0.97, when analyzed with different tDNA concentrations. The proposed DNA biosensor exhibits a good detection range from 2 to 10 nm with a low detection limit of 1.91 nm, as well as high selectivity that, under ideal conditions, distinguishes non-complementary DNA from perfectly matched tDNA. By eliminating the need for DNA purification, this work paves the path for creating disposable biosensors capable of detecting DNA from raw sputum samples.
Collapse
|
20
|
Zeb W, Altaf A, Aamir M, Baig N, Baig I, Nafady A, Sharif M, Sher M, Sohail M. Enhanced photoelectrochemical performance of P-doped g‑C3N4/Zn0.5Cd0.5S heterojunction photocathode for water splitting. Journal of Saudi Chemical Society 2022. [DOI: 10.1016/j.jscs.2022.101542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
|
21
|
Altaf A, Hassan S, Pejcic B, Baig N, Hussain Z, Sohail M. Recent progress in the design, synthesis and applications of chiral metal-organic frameworks. Front Chem 2022; 10:1014248. [PMID: 36277340 PMCID: PMC9581262 DOI: 10.3389/fchem.2022.1014248] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/16/2022] [Indexed: 11/13/2022] Open
Abstract
Chiral Metal-Organic Frameworks (CMOFs) are unique crystalline and porous class of materials which is composed of organic linkers and metal ions. CMOFs surpass traditional organic and inorganic porous materials because of their tunable shape, size, functional diversity, and selectivity. Specific applications of CMOFs may be exploited by introducing desired functional groups. CMOFs have chiral recognition abilities, making them unique for chiral compound synthesis and separation. The CMOFs can be synthesized through different approaches. Two main approaches have been discussed, i.e., direct and indirect synthesis. Synthetic strategies play an essential role in getting desired properties in MOFs. CMOFs find potential applications in adsorption, asymmetric catalysis, luminescence, degradation, and enantioselective separation. The MOFs’ porosity, stability, and reusability make them an attractive material for these applications. The plethora of applications of CMOFs have motivated chemists to synthesize novel MOFs and number of MOFs have been ever-escalating. Herein, the synthetic methods of CMOFs and their various applications have been discussed.
Collapse
Affiliation(s)
- Amna Altaf
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, Pakistan
| | - Sadia Hassan
- Department of Biomedical Engineering and Sciences, School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, Islamabad, Pakistan
| | - Bobby Pejcic
- CSIRO Mineral Resources, Australian Resources Research Centre, Kensington, CA, Australia
| | - Nadeem Baig
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| | - Zakir Hussain
- Department of Materials Engineering, School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad, Pakistan
- *Correspondence: Manzar Sohail,
| |
Collapse
|
22
|
Aimir M, Nasser A, Rokayah J, Hardin M, Sohail M. The sensitivity and specificity of methylene blue dye as a single agent in sentinel lymph node biopsy for early breast cancer. Med J Malaysia 2022; 77:552-557. [PMID: 36169065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
INTRODUCTION Axillary lymph node dissection (ALND), although associated with significant morbidity, has been the standard procedure for axillary staging for breast cancer in many hospitals in Malaysia. The limited resources for radioisotope tracer and nuclear medicine service, coupled with insufficient number of trained surgeons, have been the major obstacles to perform sentinel lymph node biopsy (SLNB). MATERIALS AND METHODS This study looks into the application of 1% methylene blue dye (MBD) as a single agent for SLNB and observes the outcome and any associated complication. Thirty-four patients with early breast cancer were enrolled. Two millilitres (ml) of 1% MBD was diluted with saline to a total volume of 5 ml. After induction of general anaesthesia, 3 ml of the diluted 1% MBD is injected subdermally at the upper outer quadrant of the breast followed by 5 minutes of massage. Sentinel nodes are identified as blue nodes or lymph nodes with a blue-stained lymphatic channel and were surgically removed. All patients then underwent tumour excision, either mastectomy or breast-conserving surgery, and ALND. The sentinel nodes were categorized to positive or negative for metastases and were compared with axillary lymph nodes for diagnostic value assessment. RESULTS Identification rate of sentinel nodes was 91.2%. The mean number of removed sentinel nodes was 2 (SD=1) and the mean number of axillary nodes was 16 (SD=6). Sentinel node metastasis was found in 13 (41.9%) cases. There were two false-negative cases, resulting in a sensitivity of 86.7% (95%CI: 62.1-96.3). The negative predictive value of sentinel nodes to predict axillary metastasis was 88.9% (95%CI: 67.2- 96.9). There were no complications observed. CONCLUSION Although inferior to the standard dual-tracer technique, the usage of MBD as a single agent in SLNB for early breast cancer still offers favourable accuracy and identification rate. With continuous training and improved surgeons experience, performing SLNB with blue dye alone is feasible in order to reduce the risks and morbidities associated with ALND.
Collapse
Affiliation(s)
- M Aimir
- Sarawak General Hospital, Department of Surgery, Kuching, Sarawak, Malaysia.
| | - A Nasser
- International Islamic University Malaysia, Kulliyyah of Medicine, Department of Surgery, Kuantan, Pahang, Malaysia
| | - J Rokayah
- Sarawak General Hospital, Department of Surgery, Kuching, Sarawak, Malaysia
| | - M Hardin
- Sarawak General Hospital, Department of Surgery, Kuching, Sarawak, Malaysia
| | - M Sohail
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia
| |
Collapse
|
23
|
Zahid M, Ismail A, Sohail M, Zhu Y. Improving selective hydrogenation of carbonyls bond in α, β-unsaturated aldehydes over Pt nanoparticles encaged within the amines-functionalized MIL-101-NH 2. J Colloid Interface Sci 2022; 628:141-152. [PMID: 35987153 DOI: 10.1016/j.jcis.2022.08.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/02/2022] [Accepted: 08/10/2022] [Indexed: 10/15/2022]
Abstract
The high selectivity in the hydrogenation reactions of α, β-unsaturated aldehydes is always a demanding task. Precious Pt-based catalysts play a pivotal role in selective catalytic hydrogenation of α, β-unsaturated aldehydes, but controlling the selectivity is still a great challenge. Herein, the Pt nanoparticles were encaged within the mesopores of amines (-NH2) functionalized MOFs via polyol reduction method as an efficient approach to enhance the selectivity of desired carbonyls bond reduction. The as-prepared 3-Pt/MOF-NH2(x) catalysts retained the inherent properties of MOF-NH2(x) supports such as crystallinity, surface area, pore texture, and surface acidity. Remarkably, the amines modified MOFs supported Pt-based catalysts (3-Pt/MOF-NH2(x)) improved the selective hydrogenation of carbonyls (CO) bond in cinnamaldehyde (CAL) and Furfural (FFL) with a higher selectivity (≥80 %) under mild conditions as compared to other reported catalysts. The improved catalytic performance for the selective hydrogenation of carbonyls (CO) bond is credited to the nitrogen (N) heteroatom of the amines group existing in the skeleton of MOFs and somewhat to the steric effect induced by mesopores of MOFs. The N heteroatom not only helps in the high uniform dispersion and stabilization of small-sized Pt nanoparticles (≈2nm) but also adjust the electron movement (electronic density) via synergistic effect resulting from the N to the vacant d-orbital of active Pt nanoparticles confined within MOFs, leading to more new interfacial electrophilic and nucleophilic sites, which are beneficial for selective hydrogenation of CO bond. Besides, the steric effect induced by mesopores of MOFs, encaging Pt nanoparticles, can also enhance the selective adsorption of the CO bond to interact with the catalyst active sites, resulting in higher selective hydrogenation of CO bond.
Collapse
Affiliation(s)
- Muhammad Zahid
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China; Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan
| | - Ahmed Ismail
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan.
| | - Yujun Zhu
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin 150080, China.
| |
Collapse
|
24
|
Iftikhar S, Aslam S, Duran H, Çitoğlu S, Kirchhoff K, Lieberwirth I, Sohail M, Yameen B. Poly(3‐hexylthiophene) stabilized ultrafine nickel oxide nanoparticles as superior electrocatalyst for oxygen evolution reaction: Catalyst design through synergistic combination of
π
‐conjugated polymers and metal‐based nanoparticles. J Appl Polym Sci 2022. [DOI: 10.1002/app.52636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sunniya Iftikhar
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering (SBASSE) Lahore University of Management Sciences (LUMS) Lahore Pakistan
| | - Saba Aslam
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering (SBASSE) Lahore University of Management Sciences (LUMS) Lahore Pakistan
| | - Hatice Duran
- Department of Materials Science & Nanotechnology Engineering TOBB University of Economics and Technology Ankara Turkey
| | - Senem Çitoğlu
- Department of Materials Science & Nanotechnology Engineering TOBB University of Economics and Technology Ankara Turkey
| | | | | | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences (SNS) National University of Sciences and Technology (NUST) Islamabad Pakistan
| | - Basit Yameen
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering (SBASSE) Lahore University of Management Sciences (LUMS) Lahore Pakistan
| |
Collapse
|
25
|
Christie M, Love C, Hanna I, Thomas G, Greenspon A, Chen S, Sanders M, Bauer C, Christopherson M, Balaji V, Skulsky S, Sohail M. Pre-clinical evaluation of a third generation absorbable antibacterial envelope. Europace 2022. [DOI: 10.1093/europace/euac053.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Private company. Main funding source(s): Medtronic
Background
An absorbable antibacterial envelope (TYRX), which stabilizes cardiac implantable electronic devices (CIEDs) was shown to significantly reduce infections in a large randomized controlled trial (WRAP-IT). A 3rd generation envelope (T3) is being developed to improve the implanter experience and enable smoother device insertion with a redesigned, multifilament mesh, an enhanced form factor, and identical polymer coating and antibiotic concentrations as the currently available 2nd generation envelope (T2).
Purpose
To compare drug elution profiles of T3 vs T2 and evaluate the efficacy of T3 against bacteria commonly known to be associated with CIED infections.
Methods
The T3 drug elution profile was assessed in vitro by evaluating the amount of each drug, minocycline and rifampin, released at a given timepoint using an accelerated dissolution method. For comparative analysis with T2, elution curve equivalency was based on similarity factor values (f2) of ≥50 per FDA guidance. An in vivo elution study was also conducted (per the Principles of Laboratory Animal Care [NIH Publication no. 85-23 revised 1985]) to ensure drug concentrations met the minimal inhibitory concentration (MIC) through 7 days. Substantial equivalence was defined as rifampin and minocycline concentrations above MIC at 2hr post-implant and sustained through 7 days. In a further animal model, 12 pockets were created in 6 rabbits, for CIED insertion with and without T3 envelopes, to evaluate efficacy against gram+ and gram- bacteria. At day 7, implant sites were evaluated for signs of infection via macroscopic observations and microbial recovery procedures. A Fisher’s Exact Test was used for comparisons.
Results
The T3 envelope showed a similar elution profile to T2 in vitro (Figure) with f2 >50 (range 76-84). In the in vivo assessment, the T3 envelope eluted both antibiotics above the MIC at 2hr post-implant with sustained elution through 7 days, consistent with historical T2 performance. Further bacterial challenge studies in vivo showed a statistically significant reduction (p<0.05) in infections with 0/6 infected pockets in the CIED + T3 group vs 6/6 infected pockets in the CIED only group consistent with T2 performance (Table).
Conclusion
The 3rd generation absorbable antibacterial envelope demonstrated equivalent pre-clinical performance compared to the 2nd generation envelope as antibiotic elution curves were equivalent, elution was sustained at concentrations above MIC for 7 days, and infection rates were significantly reduced compared to no envelope. These results suggest equivalent clinical performance could be expected with the newly designed envelope.
Collapse
Affiliation(s)
- M Christie
- 1Medtronic Inc., Melissa Christie, United States of America
| | - C Love
- The Johns Hopkins Hospital, Baltimore, United States of America
| | - I Hanna
- Brookwood Baptist Health Centers, Birmingham, United States of America
| | - G Thomas
- Weill Cornell Medical College, Pelham, United States of America
| | - A Greenspon
- Thomas Jefferson University Hospital, Elkins Park, United States of America
| | - S Chen
- 1Medtronic Inc., Melissa Christie, United States of America
| | - M Sanders
- 1Medtronic Inc., Melissa Christie, United States of America
| | - C Bauer
- 1Medtronic Inc., Melissa Christie, United States of America
| | | | - V Balaji
- 1Medtronic Inc., Melissa Christie, United States of America
| | - S Skulsky
- 1Medtronic Inc., Melissa Christie, United States of America
| | - M Sohail
- Baylor College of Medicine, Houston, United States of America
| |
Collapse
|
26
|
Qadeer N, Jabeen N, Khan LU, Sohail M, Zaheer M, Vaqas M, Kanwal A, Sajid F, Qamar S, Akhter Z. Hydrothermal synthesis and characterization of transition metal (Mn/Fe/Cu) co-doped cerium oxide-based nano-additives for potential use in the reduction of exhaust emission from spark ignition engines. RSC Adv 2022; 12:15564-15574. [PMID: 35685173 PMCID: PMC9125985 DOI: 10.1039/d2ra01954j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 05/17/2022] [Indexed: 11/21/2022] Open
Abstract
The goal of this work was to synthesize new cerium oxide-based nano-additives to minimise emissions from spark ignition (SI) engines fueled with gasoline blends, such as carbon monoxide (CO), unburned hydrocarbons (HC) and oxides of nitrogen (NOx). To investigate the effect of transition metal dopants on their respective catalytic oxidation activity, nano-sized CeO2 catalysts co-doped with Mn, Fe, Cu and Ag ions were successfully produced by a simple hydrothermal technique. The synthesis of nano-catalysts with cubic fluorite geometry was confirmed by XRD data. The addition of transition metal ions to the CeO2 lattice increased the concentration of structural defects like oxygen vacancies and Ce3+ ions, which are advantageous for the catalytic oxidation reaction, as also supported by XAFS and RAMAN analysis. Further, nano-gasoline fuel emission parameters are measured and compared to straight gasoline fuel. The results demonstrated that harmful exhaust pollutants such as CO, HC and NOx were significantly reduced. The high surface area, better redox characteristics and presence of additional oxygen vacancy sites or Ce3+ ions have been linked to the improved catalytic performance of the synthesized catalyst. Illustrating the synthesis of doped and undoped CeO2 nanomaterial and its potential application as a promising catalyst for additives to minimize emissions from spark ignition (SI) engines fueled with gasoline blends.![]()
Collapse
Affiliation(s)
- Nazish Qadeer
- Department of Chemistry, Quaid-i-Azam University (QAU) Islamabad 45320 Pakistan
| | - Naila Jabeen
- Nano Sciences and Technology Division, National Centre for Physics QAU Campus, Shahdara Valley Road, P.O. Box 2141 Islamabad 44000 Pakistan
| | - Latif U Khan
- Synchrotron-Light for Experimental Science and Applications in the Middle East (SESAME) P.O. Box 7 Allan 19252 Jordan
| | - Manzar Sohail
- School of Natural Sciences, National University of Sciences and Technology (NUST) H-12 Islamabad Pakistan
| | - Muhammad Zaheer
- SBA School of Science and Engineering, Lahore University of Management Sciences (LUMS) Pakistan
| | | | - Afia Kanwal
- Department of Chemistry, Quaid-i-Azam University (QAU) Islamabad 45320 Pakistan
| | - Fatima Sajid
- Department of Chemistry, Quaid-i-Azam University (QAU) Islamabad 45320 Pakistan
| | - Samina Qamar
- Department of Chemistry, Quaid-i-Azam University (QAU) Islamabad 45320 Pakistan
| | - Zareen Akhter
- Department of Chemistry, Quaid-i-Azam University (QAU) Islamabad 45320 Pakistan
| |
Collapse
|
27
|
Arif D, Hussain Z, Abbasi AD, Sohail M. Ag Functionalized In2O3 Derived From MIL-68(In) as an Efficient Electrochemical Glucose Sensor. Front Chem 2022; 10:906031. [PMID: 35615318 PMCID: PMC9124854 DOI: 10.3389/fchem.2022.906031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 04/19/2022] [Indexed: 11/13/2022] Open
Abstract
In this study, Ag@In2O3 modified nickel foam (NF) was reported for its role as a non-enzymatic glucose sensor. Ag@In2O3 was prepared by a simple two-step method; preparation of a metal-organic framework (MOF) MIL-68(In) by solvothermal method, entrapment of Ag + by adding AgNO3 then drying it for 2 h to complete the entrapment process and subsequent calcination at 650°C for 3 h. The Ag@In2O3 modified NF was employed as a non-enzymatic glucose sensor to determine glucose concentrations in an alkaline medium. Two linear ranges were obtained from Ag@In2O3 modified electrode, i.e., 10 μM to 0.8 mM and 0.8–2.16 mM with a sensitivity of 3.31 mA mM−1 cm−2 and 1.51 mA mM−1 cm−2 respectively, with a detection limit of 0.49 µM. Ag@In2O3 modified NF exhibited high selectivity for glucose, among other interfering agents.
Collapse
Affiliation(s)
- Dooa Arif
- Department of Materials Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Zakir Hussain
- Department of Materials Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
- *Correspondence: Zakir Hussain,
| | - Amna Didar Abbasi
- Department of Materials Engineering, School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| |
Collapse
|
28
|
Rehan K, Asma M, Misawa T, Ito T, Sokolov A, Sher M, Tirmizi SA, Sohail M. Synthesis, characterization, and magnetic / electrochemical properties of Wells-Dawson polyoxometalate containing Ni (II) counter-ion. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132331] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
29
|
Sohail M, Chua RHB, Sim SK, Nik Azim NA. Jejunal gastrointestinal stromal tumour masquerading as an ovarian cancer: A case report. Med J Malaysia 2022; 77:125-127. [PMID: 35087013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A 60-year-old lady presented with lower abdominal discomfort and a huge palpable intra-abdominal mass for 4 months, with significant weight loss over half a year. Transvaginal ultrasonography and computed tomography (CT) abdomen showed a large right solid cystic mass likely ovarian in origin. The CA-125 was raised. With the provisional diagnosis of ovarian cancer patient underwent laparotomy at Hospital Umum Sarawak, Malaysia. However intraoperative findings showed that uterus and both ovaries were normal. The tumour was arising from the jejunum and adherent to the dome of the urinary bladder and right broad ligament. The tumour was resected and final diagnosis was jejunal gastrointestinal stromal tumour (GIST). We described this case which was misinterpreted as an ovarian cancer.
Collapse
Affiliation(s)
- M Sohail
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia.
| | - R H B Chua
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia
| | - S K Sim
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia
| | - N A Nik Azim
- Hospital Umum Sarawak, Department of surgery, Jalan Hospital Kuching, Sarawak, Malaysia
| |
Collapse
|
30
|
Murugesan K, Alenad AM, Alshammari AS, Sohail M, Jagadeesh RV. Reductive N-alkylation of primary amides using nickel-nanoparticles. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
31
|
Iram S, Mahmood A, Ehsan MF, Mumtaz A, Sohail M, Sitara E, Mushtaq S, Malik MA, Fatima SA, Shaheen R, Ahmad NM, Malik SN. Impedance Spectroscopy Analysis of PbSe Nanostructures Deposited by Aerosol Assisted Chemical Vapor Deposition Approach. Nanomaterials (Basel) 2021; 11:2817. [PMID: 34835581 PMCID: PMC8622599 DOI: 10.3390/nano11112817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 11/17/2022]
Abstract
This research endeavor aimed to synthesize the lead (II) diphenyldiselenophosphinate complex and its use to obtain lead selenide nanostructured depositions and further the impedance spectroscopic analysis of these obtained PbSe nanostructures, to determine their roles in the electronics industry. The aerosol-assisted chemical vapor deposition technique was used to provide lead selenide deposition by decomposition of the complex at different temperatures using the glass substrates. The obtained films were revealed to be a pure cubic phase PbSe, as confirmed by X-ray diffraction analysis. SEM and TEM micrographs demonstrated three-dimensionally grown interlocked or aggregated nanocubes of the obtained PbSe. Characteristic dielectric measurements and the impedance spectroscopy analysis at room temperature were executed to evaluate PbSe properties over the frequency range of 100 Hz-5 MHz. The dielectric constant and dielectric loss gave similar trends, along with altering frequency, which was well explained by the Koops theory and Maxwell-Wagner theory. The effective short-range translational carrier hopping gave rise to an overdue remarkable increase in ac conductivity (σac) on the frequency increase. Fitting of a complex impedance plot was carried out with an equivalent circuit model (Rg Cg) (Rgb Qgb Cgb), which proved that grains, as well as grain boundaries, are responsible for the relaxation processes. The asymmetric depressed semicircle with the center lower to the impedance real axis provided a clear explanation of non-Debye dielectric behavior.
Collapse
Affiliation(s)
- Sadia Iram
- School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan; (S.I.); (M.F.E.); (A.M.); (M.S.); (E.S.); (S.M.)
- Department of Materials, University of Manchester, Manchester M13 9PL, UK;
| | - Azhar Mahmood
- School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan; (S.I.); (M.F.E.); (A.M.); (M.S.); (E.S.); (S.M.)
| | - Muhammad Fahad Ehsan
- School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan; (S.I.); (M.F.E.); (A.M.); (M.S.); (E.S.); (S.M.)
| | - Asad Mumtaz
- School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan; (S.I.); (M.F.E.); (A.M.); (M.S.); (E.S.); (S.M.)
| | - Manzar Sohail
- School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan; (S.I.); (M.F.E.); (A.M.); (M.S.); (E.S.); (S.M.)
| | - Effat Sitara
- School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan; (S.I.); (M.F.E.); (A.M.); (M.S.); (E.S.); (S.M.)
| | - Shehla Mushtaq
- School of Natural Sciences, National University of Sciences and Technology, Islamabad 44000, Pakistan; (S.I.); (M.F.E.); (A.M.); (M.S.); (E.S.); (S.M.)
| | | | - Syeda Arooj Fatima
- Central Diagnostic Laboratory, Physics Division, PINSTECH, P.O. Nilore., Islamabad 45500, Pakistan; (S.A.F.); (R.S.)
| | - Rubina Shaheen
- Central Diagnostic Laboratory, Physics Division, PINSTECH, P.O. Nilore., Islamabad 45500, Pakistan; (S.A.F.); (R.S.)
| | - Nasir Mahmood Ahmad
- Department of Materials Engineering, School of Chemical and Materials Engineering (SCME)-National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan; (N.M.A.); (S.N.M.)
| | - Sajid Nawaz Malik
- Department of Materials Engineering, School of Chemical and Materials Engineering (SCME)-National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan; (N.M.A.); (S.N.M.)
| |
Collapse
|
32
|
Oelsner W, Sohail M, Shreenath A, Kessler S, Philips G, Hyde J. P-134 Social determinants of health are risk factors for early onset colorectal cancer in Appalachia. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
33
|
Bagabas AA, Alsawalha M, Taha KK, Albaid A, Sohail M, Alqahtani M, Alrasheed R, Alqarn A, Ashamari B, Parkin IP. High Surface Area of Polyhedral Chromia and Hexagonal Chromium Sulfide by the Thermolysis of Cyclohexylammonium Hexaisothiocyanatochromate(III) Sesquihydrate. ChemistrySelect 2021. [DOI: 10.1002/slct.202100624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Abdulaziz A. Bagabas
- National Petrochemical Technology Center (NPTC) Materials Science Research Institute (MSRI) King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086 Riyadh 11442 Saudi Arabia
| | - Murad Alsawalha
- Department of Chemical & Process Engineering Technology Industrial Chemistry Major Jubail Industrial College Jubail Industrial City, P. O. Box 10099 31961 Saudi Arabia
| | - Kamal K. Taha
- Department of Chemistry & Industrial Chemistry College of Applied & Industrial Sciences University of Bahri Khartoum Sudan
| | - Abdelhamid Albaid
- Department of Physics Faculty of Science University of Ha'il P. O. Box 2440 Ha'il 81451 Saudi Arabia
| | - Manzar Sohail
- Department of Chemistry School of Natural Sciences National University of Science and Technology, H-12 Islamabad 44000 Pakistan
| | - Mahdi Alqahtani
- National Petrochemical Technology Center (NPTC) Materials Science Research Institute (MSRI) King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086 Riyadh 11442 Saudi Arabia
| | - Rasheed Alrasheed
- National Petrochemical Technology Center (NPTC) Materials Science Research Institute (MSRI) King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086 Riyadh 11442 Saudi Arabia
| | - Abdulaziz Alqarn
- National Petrochemical Technology Center (NPTC) Materials Science Research Institute (MSRI) King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086 Riyadh 11442 Saudi Arabia
| | - Bandar Ashamari
- National Petrochemical Technology Center (NPTC) Materials Science Research Institute (MSRI) King Abdulaziz City for Science and Technology (KACST), P. O. Box 6086 Riyadh 11442 Saudi Arabia
| | - Ivan P. Parkin
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ United Kingdom
| |
Collapse
|
34
|
Butt AS, Baig N, Khan M, Ul‐Hamid A, Sher M, Altaf M, Sohail M. HfO
2
‐CoO nanoparticles for electrochemical dopamine sensing. Electrochemical Science Adv 2021. [DOI: 10.1002/elsa.202100013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Abdul Samad Butt
- Department of Chemistry, School of Natural Sciences National University of Sciences and Technology Islamabad Pakistan
| | - Nadeem Baig
- Interdisciplinary Research Center for Membranes and Water Security King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia
| | - Munezza Khan
- School of Materials Sciences & Engineering Nanyang Technological University Singapore Singapore
| | - Anwar Ul‐Hamid
- Core Research Facilities King Fahd University of Petroleum and Minerals Dhahran Saudi Arabia
| | - Muhammad Sher
- Department of Chemistry Allama Iqbal Open University Islamabad Pakistan
| | - Muhammad Altaf
- Department of Chemistry Government College University Lahore Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences National University of Sciences and Technology Islamabad Pakistan
| |
Collapse
|
35
|
Sohail M, Loke SN, Sim SK, Nik Azim NA. Right ureteric reconstruction with vascularised interpositional appendix graft in retroperitoneal leiomyosarcoma. Med J Malaysia 2021; 76:432-435. [PMID: 34031348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We present here a case of a 66-year-old lady who was diagnosed with right iliac fossa retroperitoneal leiomyosarcoma at Hospital Umum Sarawak. The challenge in this case was the extension of tumour with the involvement of her right ureter causing proximal hydroureter and hydronephrosis. After resection of tumour en-block with the involved segment of ureter, it was not possible to repair the ureteric defect directly. We used interpositional vascularized appendix graft to repair this large (7 cm) ureteric defect. We describe here this uncommon technique of ureter reconstruction.
Collapse
Affiliation(s)
- M Sohail
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia.
| | - S N Loke
- Sarawak General Hospital, Department of Surgery, Sarawak, Malaysia
| | - S K Sim
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia
| | - N A Nik Azim
- Sarawak General Hospital, Department of Surgery, Sarawak, Malaysia
| |
Collapse
|
36
|
Bukhari SAB, Nasir H, Pan L, Tasawar M, Sohail M, Shahbaz M, Gul F, Sitara E. Supramolecular assemblies of carbon nanocoils and tetraphenylporphyrin derivatives for sensing of catechol and hydroquinone in aqueous solution. Sci Rep 2021; 11:5044. [PMID: 33658569 PMCID: PMC7930085 DOI: 10.1038/s41598-021-84294-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 02/15/2021] [Indexed: 12/22/2022] Open
Abstract
Non-enzymatic electrochemical detection of catechol (CC) and hydroquinone (HQ), the xenobiotic pollutants, was carried out at the surface of novel carbon nanocoils/zinc-tetraphenylporphyrin (CNCs/Zn-TPP) nanocomposite supported on glassy carbon electrode. The synergistic effect of chemoresponsive activity of Zn-TPP and a large surface area and electron transfer ability of CNCs lead to efficient detection of CC and HQ. The nanocomposite was characterized by using FT-IR, UV/vis. spectrophotometer, SEM and energy dispersive X-ray spectroscopy (EDS). Cyclic voltammetry, differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy were used for the electrochemical studies. CNCs/Zn-TPP/GCE nanosensor displayed a limit of detection (LOD), limit of quantification (LOQ) and sensitivity for catechol as 0.9 µM, 3.1 µM and 0.48 µA µM-1 cm-2, respectively in a concentration range of 25-1500 µM. Similarly, a linear trend in the concentration of hydroquinone detection was observed between 25 and 1500 µM with an LOD, LOQ and sensitivity of 1.5 µM, 5.1 µM and 0.35 µA µM-1 cm-2, respectively. DPV of binary mixture pictured well resolved peaks with anodic peak potential difference, ∆Epa(CC-HQ), of 110 mV showing efficient sensing of CC and HQ. The developed nanosensor exhibits stability for up to 30 days, better selectivity and good repeatability for eight measurements (4.5% for CC and 5.4% for HQ).
Collapse
Affiliation(s)
- Syeda Aqsa Batool Bukhari
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, H-12, Pakistan
| | - Habib Nasir
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, H-12, Pakistan.
| | - Lujun Pan
- School of Physics, Dalian University of Technology, Dalian, China
| | - Mehroz Tasawar
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, H-12, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, H-12, Pakistan
| | - Muhammad Shahbaz
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, H-12, Pakistan
| | - Fareha Gul
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, H-12, Pakistan
| | - Effat Sitara
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), Islamabad, H-12, Pakistan
| |
Collapse
|
37
|
Razzaque S, Khan MD, Aamir M, Sohail M, Bhoyate S, Gupta RK, Sher M, Akhtar J, Revaprasadu N. Selective Synthesis of Bismuth or Bismuth Selenide Nanosheets from a Metal Organic Precursor: Investigation of their Catalytic Performance for Water Splitting. Inorg Chem 2021; 60:1449-1461. [PMID: 33464045 PMCID: PMC8716079 DOI: 10.1021/acs.inorgchem.0c02668] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Indexed: 11/30/2022]
Abstract
The development of cost-effective, functional materials that can be efficiently used for sustainable energy generation is highly desirable. Herein, a new molecular precursor of bismuth (tris(selenobenzoato)bismuth(III), [Bi(SeOCPh)3]), has been used to prepare selectively Bi or Bi2Se3 nanosheets via a colloidal route by the judicious control of the reaction parameters. The Bi formation mechanism was investigated, and it was observed that the trioctylphosphine (TOP) plays a crucial role in the formation of Bi. Employing the vapor deposition method resulted in the formation of exclusively Bi2Se3 films at different temperatures. The synthesized nanomaterials and films were characterized by p-XRD, TEM, Raman, SEM, EDX, AFM, XPS, and UV-vis spectroscopy. A minimum sheet thickness of 3.6 nm (i.e., a thickness of 8-9 layers) was observed for bismuth, whereas a thickness of 4 nm (i.e., a thickness of 4 layers) was observed for Bi2Se3 nanosheets. XPS showed surface oxidation of both materials and indicated an uncapped surface of Bi, whereas Bi2Se3 had a capping layer of oleylamine, resulting in reduced surface oxidation. The potential of Bi and Bi2Se3 nanosheets was tested for overall water-splitting application. The OER and HER catalytic performances of Bi2Se3 indicate overpotentials of 385 mV at 10 mA cm-2 and 220 mV, with Tafel slopes of 122 and 178 mV dec-1, respectively. In comparison, Bi showed a much lower OER activity (506 mV at 10 mA cm-2) but a slightly better HER (214 mV at 10 mA cm-2) performance. Similarly, Bi2Se3 nanosheets were observed to exhibit cathodic photocurrent in photoelectrocatalytic activity, which indicated their p-type behavior.
Collapse
Affiliation(s)
- Shumaila Razzaque
- Key
Laboratory of Material Chemistry for Energy Conversion and Storage,
Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Luoyu Road No. 1037, Wuhan 430074, China
| | - Malik Dilshad Khan
- Institute
of Physical Chemistry, Polish Academy of
Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
- Department
of Chemistry, University of Zululand, Private Bag X1001, Kwa-Dlangezwa 3880, South Africa
| | - Muhammad Aamir
- Department
of Chemistry, Materials Laboratory, Mirpur
University of Science & Technology (MUST), Mirpur 10250, AJK, Pakistan
| | - Manzar Sohail
- Department
of Chemistry, School of Natural Sciences, National University of Science and Technology, H-12, Islamabad 46000, Pakistan
| | - Sanket Bhoyate
- Department
of Chemistry, Pittsburg State University, Pittsburg, Kansas 66762, United States
| | - Ram K. Gupta
- Department
of Chemistry, Pittsburg State University, Pittsburg, Kansas 66762, United States
| | - Muhammad Sher
- Department
of Chemistry, Allama Iqbal Open University, Islamabad 44000, Pakistan
| | - Javeed Akhtar
- Department
of Chemistry, Materials Laboratory, Mirpur
University of Science & Technology (MUST), Mirpur 10250, AJK, Pakistan
| | - Neerish Revaprasadu
- Department
of Chemistry, University of Zululand, Private Bag X1001, Kwa-Dlangezwa 3880, South Africa
| |
Collapse
|
38
|
Mehmood A, Ur‐Rehman Z, Altaf M, Ashraf RS, Sohail M, Isab AA. NiRu0.3Se Nanoparticles In Situ Grown on Reduced Graphene: Synthesis and Electrocatalytic Activity in the Oxygen Evolution Reaction. ChemistrySelect 2021. [DOI: 10.1002/slct.202003711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Adeel Mehmood
- Department of Chemistry Government College University Lahore 54000 Pakistan
| | - Zia Ur‐Rehman
- Department of Chemistry Government College University Lahore 54000 Pakistan
| | - Muhammad Altaf
- Department of Chemistry Government College University Lahore 54000 Pakistan
| | - Raja Shahid Ashraf
- Department of Chemistry Government College University Lahore 54000 Pakistan
| | - Manzar Sohail
- Department of Chemistry School of Natural Sciences National University of Sciences and Technology Islamabad 44000 Pakistan
| | - Anvarhusein A. Isab
- Chemistry Department King Fahd University of Petroleum and Mineral Dhahran 31261 Saudi Arabia
| |
Collapse
|
39
|
Khan S, Sohail M, Han C, Khan JA, Khan HM, Dionysiou DD. Degradation of highly chlorinated pesticide, lindane, in water using UV/persulfate: kinetics and mechanism, toxicity evaluation, and synergism by H 2O 2. J Hazard Mater 2021; 402:123558. [PMID: 32759000 DOI: 10.1016/j.jhazmat.2020.123558] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 07/13/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
Sulfate radical-advanced oxidation processes (SR-AOPs) are emerging technologies for decomposing organic pollutants in water. This study investigated the efficiency of UV/persulfate (UV/S2O82-) process to degrade lindane in water, showing 93.2% lindane removal ([lindane]0 = 3.43 μM, [S2O82-]0 = 100 μM) at a UV fluence of 720 mJ/cm2. The lindane degradation followed first order kinetics and mechanistic studies suggested H-abstraction by SO4•- and Cl removal via C-Cl bond cleavage by UV-C light. Toxicity assessment using ECOSAR program showed toxicity gradually decreased and eventually no significant toxicity remained when all by-products vanished at high UV dose. Removal efficiency of lindane decreased from 93.2% to 38.4, 45.5, 56.0, 84.3 and 88.6%, by adding 1.0 mg/L humic acid or 1.0 mM CO32-, HCO3-, Cl- or SO42-, respectively. Coupling of H2O2 with UV/S2O82- showed a significant synergistic effect with 99.0% lindane removal at a UV fluence of 600 mJ/cm2, using [S2O82-]0 = [H2O2]0 = 50 μM while UV/H2O2 resulted in only 36.6% lindane removal ([lindane]0 = 3.43 μM, [H2O2]0 = 100 μM) at a UV fluence of 720 mJ/cm2. The results indicate that SR-AOP has potential for consideration as a remedial technology to treat persistent chlorinated pesticides such as lindane in contaminated water.
Collapse
Affiliation(s)
- Sanaullah Khan
- Department of Chemistry, Women University, Swabi, 23430, Pakistan; Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan; Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, Ohio, 45221-0012, USA
| | - M Sohail
- Institute of Chemical Sciences, University of Swat, Swat, 19130, Pakistan
| | - Changseok Han
- Department of Environmental Engineering, INHA University, Incheon, 22212, Republic of Korea
| | - Javed Ali Khan
- Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan
| | - Hasan M Khan
- Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, Ohio, 45221-0012, USA.
| |
Collapse
|
40
|
Sitara E, Nasir H, Mumtaz A, Ehsan MF, Sohail M, Iram S, Bukhari SAB. Efficient Photoelectrochemical Water Splitting by Tailoring MoS 2/CoTe Heterojunction in a Photoelectrochemical Cell. Nanomaterials (Basel) 2020; 10:E2341. [PMID: 33255862 PMCID: PMC7760392 DOI: 10.3390/nano10122341] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 01/27/2023]
Abstract
Solar energy conversion through photoelectrochemical water splitting (PEC) is an upcoming promising technique. MoS2/CoTe heterostructures were successfully prepared and utilized for PEC studies. MoS2 and CoTe were prepared by a hydrothermal method which were then ultrasonicated with wt. % ratios of 1:3, 1:1 and 3:1 to prepare MoS2/CoTe (1:3), MoS2/CoTe (1:1) and MoS2/CoTe (3:1) heterostructure, respectively. The pure materials and heterostructures were characterized by XRD, UV-vis-DRS, SEM, XPS, PL and Raman spectroscopy. Photoelectrochemical measurements were carried out by linear sweep voltammetry and electrochemical impedance spectroscopic measurements. A maximum photocurrent density of 2.791 mA/cm2 was observed for the MoS2/CoTe (1:1) heterojunction which is about 11 times higher than the pristine MoS2. This current density was obtained at an applied bias of 0.62 V vs. Ag/AgCl (1.23 V vs. RHE) under the light intensity of 100 mW/cm2 of AM 1.5G illumination. The enhanced photocurrent density may be attributed to the efficient electron-hole pair separation. The solar to hydrogen conversion efficiency was found to be 0.84% for 1:1 MoS2/CoTe, signifying the efficient formation of the p-n junction. This study offers a novel heterojunction photocatalyst, for PEC water splitting.
Collapse
Affiliation(s)
| | - Habib Nasir
- School of Natural Sciences, National University of Sciences and Technology, H-12, Islamabad 44000, Pakistan; (E.S.); (A.M.); (M.F.E.); (M.S.); (S.I.); (S.A.B.B.)
| | | | | | | | | | | |
Collapse
|
41
|
Arif D, Hussain Z, Sohail M, Liaqat MA, Khan MA, Noor T. A Non-enzymatic Electrochemical Sensor for Glucose Detection Based on Ag@TiO 2@ Metal-Organic Framework (ZIF-67) Nanocomposite. Front Chem 2020; 8:573510. [PMID: 33195063 PMCID: PMC7593784 DOI: 10.3389/fchem.2020.573510] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/12/2020] [Indexed: 11/21/2022] Open
Abstract
This work presents the preparation of an efficient and sensitive glucose sensor for the detection of glucose in an alkaline media. The glucose sensor is composed of a metal organic framework (MOF) composite comprising Ag@TiO2 nanoparticles. The hybrid of Ag@TiO2 encapsulated in ZIF-67 was synthesized by the solvothermal method and applied onto a glassy carbon electrode (GCE) for the non-enzymatic sensing of glucose. The porosity of ZIF-67 was favorable for the unhindered diffusion and entrapment of glucose and its cavities served as reaction vessels. The electrochemical behavior of Ag@TiO2@ZIF-67 showed amplified results when compared with that of Ag@TiO2 and ZIF-67. Cyclic tests toward the oxidation of glucose has demonstrated excellent stability of a MOF-based hybrid sensor. The sensor based on Ag@TiO2@ZIF-67 showed high sensitivity of 0.788 μAμM−1cm−2 with a linear concentration range of 48 μM−1 mM and a response time of 5 s with an excellent detection limit of 0.99 μM (S/N = 3).
Collapse
Affiliation(s)
- Dooa Arif
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Zakir Hussain
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Muhammad Arman Liaqat
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Muzamil Ahmad Khan
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Tayyaba Noor
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| |
Collapse
|
42
|
Batool S, Liaqat U, Hussain Z, Sohail M. Synthesis, Characterization and Process Optimization of Bone Whitlockite. Nanomaterials (Basel) 2020; 10:E1856. [PMID: 32957429 PMCID: PMC7559027 DOI: 10.3390/nano10091856] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/20/2020] [Accepted: 08/20/2020] [Indexed: 12/14/2022]
Abstract
Whitlockite, being the second most abundant bio-mineral in living bone, finds huge applications in tissue regeneration and implants and its synthesis into its pure form has remained a challenge. Although precipitation of whitlockite phase has been reported recently in many publications, effects of various parameters to control such phase as well as conditions for the bulk preparation of this extremely important bio-mineral have not been investigated so far. In this work, we report the precipitation of pure whitlockite phase using common precursors. As reported in the literature, whitlockite is stable in a narrow pH range, therefore; optimization of pH for the stabilization of whitlockite phase has been investigated. Additionally, in order to narrow down the optimum conditions for the whitlockite precipitation, effect of temperature and heating conditions has also been studied. The obtained solids were characterized using powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). From PXRD analysis, it was observed that heating the precursor's mixture at 100 °C with subsequent aging at the optimized pH resulted in the precipitation of pure whitlockite phase. These results were further confirmed by TGA, SEM and Raman spectroscopy analysis and it was confirmed that the conditions reported here favor whitlockite precipitation without formation of any secondary phase. These reaction conditions were further confirmed by changing all the parameters like aging, heating time, feed rate of precursors one by one. From PXRD analysis of these samples, it was concluded that not only pH but temperature, heating time, aging time and feed rate effect simultaneously on the precipitation of pure whitlockite phase and a subtle change in any of these parameters could lead to the formation of undesired stable secondary calcium phosphate phases.
Collapse
Affiliation(s)
- Sadaf Batool
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Sector H-12, 44000 Islamabad, Pakistan; (S.B.); (U.L.)
| | - Usman Liaqat
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Sector H-12, 44000 Islamabad, Pakistan; (S.B.); (U.L.)
| | - Zakir Hussain
- School of Chemical and Materials Engineering (SCME), National University of Sciences & Technology (NUST), Sector H-12, 44000 Islamabad, Pakistan; (S.B.); (U.L.)
| | - Manzar Sohail
- Department of Chemistry, School of Natural Sciences (SNS), National University of Sciences & Technology (NUST), Sector H-12, 44000 Islamabad, Pakistan;
| |
Collapse
|
43
|
Rehan K, Asma M, McMillen CD, Sokolov A, Sohail M, Sher M, Shafique MA, Bukhari N, Tirmizi SA. Synthesis, structure, and properties of the multinuclear cobalt core POM Na14[Co3O(H2O)(A-α-PW9O34)2]·~29.5H2O. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
44
|
Sohail M, Alyson T, Sim SK, Nik Azim NA. Intestinal knotting: A case report and brief literature review. Med J Malaysia 2020; 75:606-608. [PMID: 32918439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Ileo-ileal knotting is a rare cause of intestinal obstruction. In this condition, one bowel loop makes a knot with an adjacent bowel loop, resulting in mechanical obstruction and even gangrene of the bowel. We present a case of a young girl with ileo-ileal knotting resulting in a closed-loop obstruction and gangrene of the small bowel loop. This is a difficult condition to diagnose; a high index of suspicion and early surgical intervention are essential to reduce morbidity and mortality.
Collapse
Affiliation(s)
- M Sohail
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia.
| | - T Alyson
- Sarawak General Hospital, Department of Surgery, Jalan Hospital, Kuching, Sarawak, Malaysia
| | - S K Sim
- Universiti Malaysia Sarawak, Faculty of Medicine and Health Sciences, Kota Samarahan, Sarawak, Malaysia
| | - N A Nik Azim
- Sarawak General Hospital, Department of Surgery, Jalan Hospital, Kuching, Sarawak, Malaysia
| |
Collapse
|
45
|
Zafar A, Ahmad KS, Jaffri SB, Sohail M. Physical vapor deposition of SnS:PbS-dithiocarbamate chalcogenide semiconductor thin films: elucidation of optoelectronic and electrochemical features. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1799371] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Aimen Zafar
- Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, Pakistan
| | - Khuram Shahzad Ahmad
- Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, Pakistan
| | - Shaan Bibi Jaffri
- Department of Environmental Sciences, Fatima Jinnah Women University, Rawalpindi, Pakistan
| | - Manzar Sohail
- School of Natural Science, National University of Sciences and Technology (NUST), Islamabad, Pakistan
| |
Collapse
|
46
|
Zahra T, Ahmad KS, Thomas AG, Zequine C, Gupta RK, Malik MA, Sohail M. Phyto-inspired and scalable approach for the synthesis of PdO-2Mn 2O 3: a nano-material for application in water splitting electro-catalysis. RSC Adv 2020; 10:29961-29974. [PMID: 35518230 PMCID: PMC9056303 DOI: 10.1039/d0ra04571c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 07/11/2020] [Indexed: 12/23/2022] Open
Abstract
A modified co-precipitation method has been used for the synthesis of a PdO-2Mn2O3 nanocomposite as an efficient electrode material for the electro-catalytic oxygen evolution (OER) and hydrogen evolution reaction (HER). Palladium acetate and manganese acetate in molar ratio 1 : 4 were dissolved in water, and 10 ml of an aqueous solution of phyto-compounds was slowly added until completion of precipitation. The filtered and dried precipitates were then calcined at 450 °C to obtain a blackish brown colored mixture of PdO-2Mn2O3 nanocomposite. These particles were analyzed by ultra violet visible spectrophotometry (UV-vis), infrared spectroscopy (FTIR), powder X-ray diffractometry (XRD), scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) for crystallinity, optical properties, and compositional and morphological makeup. Using Tauc's plot, the direct band gap (3.18 eV) was calculated from the absorption spectra. The average crystallite sizes, as calculated from the XRD, were found to be 15 and 14.55 nm for PdO and Mn2O3, respectively. A slurry of the phyto-fabricated PdO-2Mn2O3 powder was deposited on Ni-foam and tested for electro-catalytic water splitting studies in 1 M KOH solution. The electrode showed excellent OER and HER performance with low over-potential (0.35 V and 121 mV) and Tafel slopes of 115 mV dec-1 and 219 mV dec-1, respectively. The outcomes obtained from this study provide a direction for the fabrication of a cost-effective mixed metal oxide based electro-catalyst via an environmentally benign synthesis approach for the generation of clean energy.
Collapse
Affiliation(s)
- Taghazal Zahra
- Department of Environmental Sciences, Fatima Jinnah Women University The Mall Rawalpindi Pakistan
| | - Khuram Shahzad Ahmad
- Department of Environmental Sciences, Fatima Jinnah Women University The Mall Rawalpindi Pakistan
| | - Andrew Guy Thomas
- Department of Materials, Photon Science Institute and Sir Henry Royce Institute, Alan Turing Building, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Camila Zequine
- Department of Chemistry, Pittsburg State University 1701 South Broadway Street Pittsburg KS 66762 USA
| | - Ram K Gupta
- Department of Chemistry, Pittsburg State University 1701 South Broadway Street Pittsburg KS 66762 USA
| | - Mohammad Azad Malik
- Department of Materials, Photon Science Institute and Sir Henry Royce Institute, Alan Turing Building, The University of Manchester Oxford Road Manchester M13 9PL UK
| | - Manzar Sohail
- School of Natural Sciences, National University of Sciences and Technology (NUST) Islamabad Pakistan
| |
Collapse
|
47
|
Ajmal S, Bokhari M, Kasi AK, Kasi JK, Sohail M. Effect of Titanium Substrate Surface on the Titanium Oxide Membrane Pore Diameter, Formed upon Anodization in the Presence of Fluoride Ions. THEOR EXP CHEM+ 2020. [DOI: 10.1007/s11237-020-09636-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
48
|
Sohail M, Baig N, Sher M, Jamil R, Altaf M, Akhtar S, Sharif M. A Novel Tin-Doped Titanium Oxide Nanocomposite for Efficient Photo-Anodic Water Splitting. ACS Omega 2020; 5:6405-6413. [PMID: 32258875 PMCID: PMC7114145 DOI: 10.1021/acsomega.9b03876] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 01/30/2020] [Indexed: 06/11/2023]
Abstract
Herein, we report the expedient synthesis of new nanocomposite Sn0.39Ti0.61O2·TiO2 flakes using simple sol-gel and calcination methods. In order to prepare this material, first, we generated a polymeric gel using cost-effective and easily accessible precursors such as SnCl4, titanium isopropoxide, and tetrahydrofuran (THF). A small amount of triflic acid was used to initiate THF polymerization. The calcination of the resulting gel at 500 °C produced a Sn-Ti bimetallic nanocomposite. This newly synthesized Sn0.39Ti0.61O2·TiO2 was characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and UV-visible spectroscopy. The photoelectrochemical (PEC) studies were performed for the first time using Sn0.39Ti0.61O2·TiO2 coated over fluorine-doped tin oxide (FTO) under simulated 1 sun solar radiation. The chronoamperometric study of the Sn0.39Ti0.61O2·TiO2/FTO revealed the repeatable and substantially higher photocurrent for the oxygen evolution reaction (OER) when compared to only TiO2. Moreover, the synthesized material exhibited high stability both in the presence and absence of light. The photocatalytic studies suggested that the sol-gel-synthesized Sn0.39Ti0.61O2·TiO2 can be efficiently used as a photoanode in the water-splitting reaction.
Collapse
Affiliation(s)
- Manzar Sohail
- Department
of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad 45320, Pakistan
| | - Nadeem Baig
- Chemistry
Department, King Fahd University of Petroleum
and Minerals, Dhahran 31261, Saudi Arabia
- Center
for Research Excellence in Desalination and Water Treatment, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Muhammad Sher
- Department
of Chemistry, Allama Iqbal Open University, Islamabad 44000, Pakistan
| | - Rabia Jamil
- Department
of Chemistry, School of Natural Sciences, National University of Sciences and Technology, Islamabad 45320, Pakistan
| | - Muhammad Altaf
- Department
of Chemistry, Government College University, Lahore 54000, Pakistan
| | - Sultan Akhtar
- Electron
Microscopy Unit, Institute for Research and Medical Consultations, Imam Abdulrahman Bin Faisal University, Dammam 31441, Saudi Arabia
| | - Muhammad Sharif
- Chemistry
Department, King Fahd University of Petroleum
and Minerals, Dhahran 31261, Saudi Arabia
| |
Collapse
|
49
|
Iqbal M, Karim A, Ali S, Nawaz Tahir M, Sohail M. Synthesis, characterization, structural elucidation, electrochemistry, DNA binding study, micellization behaviour and antioxidant activity of the Cu(II) carboxylate complexes. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114310] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
50
|
Iqbal M, Ali S, Sohail M, Tahir MN, Anderson PA. Mononuclear vs. binuclear carboxylates of copper(II) with 2,2′‐bipyridine: Synthesis, characterization, structural description, and properties. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201900048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Muhammad Iqbal
- Department of ChemistryBacha Khan University Charsadda Pakistan
| | - Saqib Ali
- Department of ChemistryQuaid‐i‐Azam University Islamabad Pakistan
| | - Manzar Sohail
- Department of Chemistry, School of Natural SciencesNational University of Science and Technology Islamabad Pakistan
| | | | | |
Collapse
|