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Nayab F, Aamir M, Khan ME, Wali Q, Sher M, Khurshid H, Akhtar J. Color-tunable stable quasi-2D hybrid metal halide perovskites: synthesis, characterization, and optical analysis. Phys Chem Chem Phys 2024; 26:6058-6067. [PMID: 38295376 DOI: 10.1039/d3cp05563a] [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: 02/02/2024]
Abstract
Metal halide perovskites show remarkable optical properties and useful applications in optoelectronic devices. However, the instability of three-dimensional (3D) metal halide perovskites limits their applications, leading to the emergence of more stable two-dimensional (2D) metal halide perovskites. Herein, we present a facile synthesis of the 2D hybrid metal halide perovskite (EDA)(MA)n-1PbnBr3n+1 (EDA: ethylene diammonium, MA: methylammonium), where n = 1-6, and MAPbBr3 perovskite layers using an anti-solvent co-precipitation technique. The synthesized materials exhibited tunable optical properties, and the color emissions of pure EDAPbBr4 and (EDA)(MA)2Pb3Br10 perovskites were successfully tailored by altering halide anion layers. The band gap decreases as the value of n in the (EDA)(MA)n-1PbnBr3n+1 compound increases from 1 to 6. The as-prepared materials were characterized using X-ray diffraction (XRD) technique, Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-Vis), photoluminescence spectroscopy (PL), scanning electron microscopy (SEM), and energy dispersive X-ray analysis (EDX). Finally, the stability of the 2D hybrid metal halide perovskite structures was evaluated under ambient conditions over different periods. Their tunable color emission was investigated and robust fluorescence was observed after 55 days. Thus, this study provides valuable insights into the synthesis and characterization of 2D hybrid metal halide perovskites for tunable color emission, highlighting their potential for use in various optoelectronic applications.
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Affiliation(s)
- Farva Nayab
- Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur-10250, AJK, Pakistan.
- Department of Chemistry, Allama Iqbal Open University, H-8, Islamabad 44000, Pakistan.
| | - Muhammad Aamir
- Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur-10250, AJK, Pakistan.
| | - Muhammad Ejaz Khan
- Department of Computer Engineering, National University of Technology, Islamabad 44000, Pakistan.
| | - Qamar Wali
- NUTECH School of Applied Sciences & Humanities, National University of Technology, Islamabad 44000, Pakistan.
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Muhammad Sher
- Department of Chemistry, Allama Iqbal Open University, H-8, Islamabad 44000, Pakistan.
| | - Hafsa Khurshid
- Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur-10250, AJK, Pakistan.
| | - Javeed Akhtar
- Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur-10250, AJK, Pakistan.
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Butt Z, Aamir M, Aziz S, Akhtar J, Afaq A, Naseer S, Wali Q, Nadeem M, Jabeen U. Green synthesis of Cu-Mn co-incorporated ZnO nanoparticles for antibacterial and photocatalytic applications. Microsc Res Tech 2023; 86:1132-1143. [PMID: 37477113 DOI: 10.1002/jemt.24386] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/06/2023] [Accepted: 06/21/2023] [Indexed: 07/22/2023]
Abstract
The synergistic effect of bimetallic co-incorporated metal oxides have gained enormous attention due to their unique optoelectronic properties. Herein, we present the green synthesis of ZnO, Cu-incorporated ZnO, Mn-incorporated ZnO, and Cu-Mn co-incorporated nanoparticles (ZnO NPs, CuZnO NPs, MnZnO NPs, MnCuZnO NPs) for antimicrobial and photocatalytic reduction applications using corn silk extract and industrial metal wastes. The as-synthesized NPs were characterized by using UV-visible absorption spectroscopy (UV-Vis), photoluminescence (PL) spectroscopy, Fourier-transformed infrared spectroscopy (FT-IR), powdered x-ray diffraction (XRD), and scanning electron microscopy (SEM). CuZnO, MnZnO, and MnCuZnO NPs efficiently inhibited bacterial culture growth. The photocatalytic reduction activity of as-synthesized NPs against the different concentrations of 4-nitrophenol (4-NP) in water was also investigated. CuZnO and MnCuZnO nanoparticles were to be efficient photocatalysts for reducing 4-NP into 4-aminophenol (4-AP). RESEARCH HIGHLIGHTS: Green synthesis of nanomaterials by agricultural and industrial wastes Cu and Mn co-incorporated ZnO NPs have shown good photocatalysis and antimicrobial activities Green approach for waste conversion to value-added products.
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Affiliation(s)
- Zakia Butt
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJK), Pakistan
| | - Muhammad Aamir
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJK), Pakistan
- Department of Chemistry, Allama Iqbal Open University, Islamabad, Pakistan
| | - Shahid Aziz
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJK), Pakistan
| | - Javeed Akhtar
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJK), Pakistan
| | - Adil Afaq
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJK), Pakistan
| | - Sania Naseer
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, (AJK), Pakistan
| | - Qamar Wali
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, People's Republic of China
| | - Muhammad Nadeem
- Department of Chemistry, Allama Iqbal Open University, Islamabad, Pakistan
| | - Uzma Jabeen
- Faculty of Basic Sciences, Sardar Bahadur Khan Women's University, Quetta, Pakistan
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Iftikhar FJ, Shah A, Wali Q, Kokab T. Advancements in Nanofiber-Based Electrochemical Biosensors for Diagnostic Applications. Biosensors (Basel) 2023; 13:bios13040416. [PMID: 37185491 PMCID: PMC10136113 DOI: 10.3390/bios13040416] [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] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/20/2023] [Accepted: 03/22/2023] [Indexed: 05/17/2023]
Abstract
Biosensors are analytical tools that can be used as simple, real-time, and effective devices in clinical diagnosis, food analysis, and environmental monitoring. Nanoscale functional materials possess unique properties such as a large surface-to-volume ratio, making them useful for biomedical diagnostic purposes. Nanoengineering has resulted in the increased use of nanoscale functional materials in biosensors. Various types of nanostructures i.e., 0D, 1D, 2D, and 3D, have been intensively employed to enhance biosensor selectivity, limit of detection, sensitivity, and speed of response time to display results. In particular, carbon nanotubes and nanofibers have been extensively employed in electrochemical biosensors, which have become an interdisciplinary frontier between material science and viral disease detection. This review provides an overview of the current research activities in nanofiber-based electrochemical biosensors for diagnostic purposes. The clinical applications of these nanobiosensors are also highlighted, along with a discussion of the future directions for these materials in diagnostics. The aim of this review is to stimulate a broader interest in developing nanofiber-based electrochemical biosensors and improving their applications in disease diagnosis. In this review, we summarize some of the most recent advances achieved in point of care (PoC) electrochemical biosensor applications, focusing on new materials and modifiers enabling biorecognition that have led to improved sensitivity, specificity, stability, and response time.
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Affiliation(s)
- Faiza Jan Iftikhar
- School of Applied Sciences & Humanities, National University of Technology, Islamabad 44000, Pakistan
| | - Afzal Shah
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Qamar Wali
- School of Applied Sciences & Humanities, National University of Technology, Islamabad 44000, Pakistan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Tayyaba Kokab
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
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Xue T, Yang Y, Yu D, Wali Q, Wang Z, Cao X, Fan W, Liu T. 3D Printed Integrated Gradient-Conductive MXene/CNT/Polyimide Aerogel Frames for Electromagnetic Interference Shielding with Ultra-Low Reflection. Nanomicro Lett 2023; 15:45. [PMID: 36752927 PMCID: PMC9908813 DOI: 10.1007/s40820-023-01017-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/05/2023] [Indexed: 06/18/2023]
Abstract
Construction of advanced electromagnetic interference (EMI) shielding materials with miniaturized, programmable structure and low reflection are promising but challenging. Herein, an integrated transition-metal carbides/carbon nanotube/polyimide (gradient-conductive MXene/CNT/PI, GCMCP) aerogel frame with hierarchical porous structure and gradient-conductivity has been constructed to achieve EMI shielding with ultra-low reflection. The gradient-conductive structures are obtained by continuous 3D printing of MXene/CNT/poly (amic acid) inks with different CNT contents, where the slightly conductive top layer serves as EM absorption layer and the highly conductive bottom layer as reflection layer. In addition, the hierarchical porous structure could extend the EM dissipation path and dissipate EM by multiple reflections. Consequently, the GCMCP aerogel frames exhibit an excellent average EMI shielding efficiency (68.2 dB) and low reflection (R = 0.23). Furthermore, the GCMCP aerogel frames with miniaturized and programmable structures can be used as EMI shielding gaskets and effectively block wireless power transmission, which shows a prosperous application prospect in defense industry and aerospace.
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Affiliation(s)
- Tiantian Xue
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, People's Republic of China
| | - Yi Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, People's Republic of China
| | - Dingyi Yu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, People's Republic of China
| | - Qamar Wali
- NUTECH School of Applied Sciences & Humanities, National University of Technology, Islamabad, 44000, Pakistan
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Xuesong Cao
- Institute of Environmental Processes and Pollution Control, School of Environment and Civil Engineering, Jiangnan University, Wuxi, 214122, People's Republic of China
| | - Wei Fan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, People's Republic of China.
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, People's Republic of China.
| | - Tianxi Liu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, People's Republic of China.
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, People's Republic of China.
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Sharif MN, Khan MA, Wali Q, Zhang P, Wang F, Liu Y. Proposing the n +-AlGaN tunnel junction for an efficient deep-ultraviolet light-emitting diode at 254 nm emission. Appl Opt 2022; 61:9186-9192. [PMID: 36607052 DOI: 10.1364/ao.473561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 09/27/2022] [Indexed: 06/17/2023]
Abstract
Toxic and low-pressure deep-ultraviolet (DUV) mercury lamps have been used widely for applications of surface disinfection and water sterilization. The exposure of pathogens to 254 nm DUV radiations has been proven to be an effective and environmentally safe way to inactivate germs as well as viruses in short time. To replace toxic mercury DUV lamps, an n +-A l G a N tunnel junction (TJ)-based DUV light-emitting diode (LED) at 254 nm emission has been investigated. The studied conventional LED device has maximum internal quantum efficiency (IQE) of 50% with an efficiency droop of 18% at 200A/c m 2. In contrast, the calculated results show that a maximum IQE of 82% with a 3% efficiency droop under a relatively higher injection current was estimated by employing a 5 nm thin n +-A l G a N TJ with a 0.70 aluminum molar fraction. In addition, the TJ LED emitted power has been improved significantly by 2.5 times compared with a conventional LED structure. Such an efficient n +-A l G a N TJ-based DUV LED at 254 nm emission might open a new way, to the best of our knowledge, for the development of safe and efficient germicidal irradiation sources.
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Jabeen U, Iqbal A, Aamir M, Wali Q, Ahmad I, Malghani MNK, Akhtar J. Synthesis of Cu-doped ZnO for bulk heterojunction hybrid solar cells. Chem Pap 2022. [DOI: 10.1007/s11696-022-02215-y] [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: 11/03/2022]
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Naseer S, Aamir M, Mirza MA, Jabeen U, Tahir R, Malghani MNK, Wali Q. Synthesis of Ni–Ag–ZnO solid solution nanoparticles for photoreduction and antimicrobial applications. RSC Adv 2022; 12:7661-7670. [PMID: 35424718 PMCID: PMC8982279 DOI: 10.1039/d2ra00717g] [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: 02/02/2022] [Accepted: 03/03/2022] [Indexed: 12/03/2022] Open
Abstract
ZnO is one of the most promising and efficient semiconductor materials for various light-harvesting applications. Herein, we reported the tuning of optical properties of ZnO nanoparticles (NPs) by co-incorporation of Ni and Ag ions in the ZnO lattice. A sonochemical approach was used to synthesize pure ZnO NPs, Ni–ZnO, Ag–ZnO and Ag/Ni–ZnO with different concentrations of Ni and Ag (0.5%, 2%, 4%, 8%, and 15%) and Ni doped Ag–ZnO solid solutions with 0.25%, 0.5%, and 5% Ni ions. The as-synthesized Ni–Ag–ZnO solid solution NPs were characterized by powdered X-ray diffraction (pXRD), FT-IR spectroscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), UV-vis (UV) spectroscopy, and photoluminescence (PL) spectroscopy. Ni–Ag co-incorporation into a ZnO lattice reduces charge recombination by inducing charge trap states between the valence and conduction bands of ZnO and interfacial transfer of electrons. The Ni doped Ag–ZnO solid solution NPs have shown superior 4-nitrophenol reduction compared to pure ZnO NPs which do not show this reaction. Furthermore, a methylene blue (MB) clock reaction was also performed. Antibacterial activity against E. coli and S. aureus has inhibited the growth pattern of both strains depending on the concentration of catalysts. The synergic effect of Ni and Ag in Ni–Ag–ZnO solid solutions has tuned the optoelectronic properties of ZnO for photoreduction reactions.![]()
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Affiliation(s)
- Sania Naseer
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur 10250, AJK, Pakistan
| | - Muhammad Aamir
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur 10250, AJK, Pakistan
| | - Muhammad Aslam Mirza
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur 10250, AJK, Pakistan
| | - Uzma Jabeen
- Faculty of Basic Sciences, Sardar Bahadur Khan Women's University, Quetta 87300, Pakistan
| | - Raja Tahir
- Department of Biotechnology, Mirpur University of Science and Technology (MUST), Mirpur 10250, AJK, Pakistan
| | | | - Qamar Wali
- School of Applied Sciences and Humanities, National University of Technology, I-12, Islamabad, 42000, Pakistan
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Jamil T, Munir S, Wali Q, Shah GJ, Khan ME, Jose R. Water Purification through a Novel Electrospun Carbon Nanofiber Membrane. ACS Omega 2021; 6:34744-34751. [PMID: 34963957 PMCID: PMC8697392 DOI: 10.1021/acsomega.1c05197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Here, we report water purification through novel polyvinyl alcohol (PVA)-based carbon nanofibers synthesized through the electrospinning technique. In our novel approach, we mix PVA and tetraethyl orthosilicate (TEOS) with green tea solutions with different concentrations to synthesize carbon-based nanofibers (CNFs) and further calcine at 280 °C for carbonization. The scanning electron microscopy (SEM) results show the diameter of the nanofibers to be ∼500 nm, which decreases by about 50% after carbonization, making them more suitable candidates for the filtration process. Next, using these carbon nanofibers, we prepare filters for water purification. The synthesized CNF filters show excellent performance and successful removal of contaminants from the water by analyzing the CNF-based filters before and after the filtration of water through SEM and energy-dispersive X-ray (EDX) spectroscopy. Our SEM and EDX results indicate the presence of various nanoparticles consisting of different elements such as Mg, Na, Ti, S, Si, and Fe on the filters, after the filtration of water. Additionally, the SEM results show that PVA and TEOS concentrations play an important role in the formation, uniformity, homogeneity, and particularly in the reduction of the nanofiber diameter.
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Affiliation(s)
- Tariq Jamil
- Faculty
of Engineering Science, Ghulam Ishaq Khan
Institute of Engineering Sciences and Technology, 23460 Topi, Khyber Pakhtunkhwa, Pakistan
| | - Shamsa Munir
- School
of Applied Sciences & Humanities, National
University of Technology, 44000 Islamabad, Pakistan
| | - Qamar Wali
- School
of Applied Sciences & Humanities, National
University of Technology, 44000 Islamabad, Pakistan
| | - Gul Jamil Shah
- Pakistan
Navy Engineering College, National University
of Science and Technology, 44000 Islamabad, Pakistan
| | - Muhammad Ejaz Khan
- Department
of Computer Engineering, National University
of Technology, 44000 Islamabad, Pakistan
| | - Rajan Jose
- Nanostructured
Renewable Energy Materials Laboratory, Faculty
of Industrial Sciences & Technology, 26300 Kuantan, Pahang, Malaysia
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Wali Q, Aamir M, Ullah A, Iftikhar FJ, Khan ME, Akhtar J, Yang S. Fundamentals of Hysteresis in Perovskite Solar Cells: From Structure-Property Relationship to Neoteric Breakthroughs. CHEM REC 2021; 22:e202100150. [PMID: 34418290 DOI: 10.1002/tcr.202100150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 05/17/2021] [Revised: 07/07/2021] [Accepted: 08/04/2021] [Indexed: 11/08/2022]
Abstract
Perovskite solar cells (PSC) have shown a rapid increase in efficiency than other photovoltaic technology. Despite its success in terms of efficiency, this technology is inundated with numerous challenges hindering the progress towards commercial viability. The crucial one is the anomalous hysteresis observed in the photocurrent density-voltage (J-V) response in PSC. The hysteresis phenomenon in the solar cell presents a challenge for determining the accurate power conversion efficiency of the device. A detailed investigation of the fundamental origin of hysteresis behavior in the device and its associated mechanisms is highly crucial. Though numerous theories have been proposed to explain the causes of hysteresis, its origin includes slow transient capacitive current, trapping, and de-trapping process, ion migrations, and ferroelectric polarization. The remaining issues and future research required toward the understanding of hysteresis in PSC device is also discussed.
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Affiliation(s)
- Qamar Wali
- School of Applied Sciences and Humanities, National University of Technology, I-12, Islamabad, 42000, Pakistan
| | - Muhammad Aamir
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, 10250 (AJK), Pakistan
| | - Abid Ullah
- Material laboratory, Department of Physics, Comsats Institute of information technology, Islamabad, Pakistan
| | - Faiza Jan Iftikhar
- School of Applied Sciences and Humanities, National University of Technology, I-12, Islamabad, 42000, Pakistan
| | - Muhammad Ejaz Khan
- Department of Computer Engineering, National University of Technology, I-12, Islamabad, 42000, Pakistan
| | - Javeed Akhtar
- Materials Laboratory, Department of Chemistry, Mirpur University of Science and Technology (MUST), Mirpur, 10250 (AJK), Pakistan
| | - Shengyuan Yang
- State Key Laboratory for Modification of Chemical Fibres and Polymer Materials, Shanghai "Belt & Road" Joint Laboratory of Advanced Fibers and Low-dimension Materials College of Materials Science and Engineering, Donghua University, Shanghai., 201620, P.R. China
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Tabassum S, Zia M, Carcahe de Blanco EJ, Batool R, Aslam R, Hussain S, Wali Q, Gulzar MM. Phytochemical, in-vitro biological and chemo-preventive profiling of Arisaema jacquemontii Blume tuber extracts. Altern Ther Health Med 2019; 19:256. [PMID: 31521162 PMCID: PMC6744708 DOI: 10.1186/s12906-019-2668-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 08/30/2019] [Indexed: 03/12/2023]
Abstract
Background Arisaema jacquemontii is traditionally used in treatment of different diseases. In this study, phytochemical, in vitro biological and chemo-preventive screening of A. jacquemontii was carried out to explore its pharmacological potential. Methods The dried tuber of A. jacquemontii was extracted in 11 organic solvent mixture of different polarity. The extracts were screened for phytochemical assays (phenolics and flavonoids), antioxidants potential (free radical scavenging activity, total antioxidant activity, reducing power), biological activities (antibacterial, antifungal, cytotoxic, antileishmanial, protein kinase inhibition), and chemopreventive activities using different cell lines through standard protocols. Results Significant amount phenolic contents were determined in EtOH and MeOH extracts (210.3 ± 3.05 and 193.2 ± 3.15 μg GAE/mg, respectively). Maximum flavonoid content was determined in MeOH extract (22.4 ± 4.04 μg QE/mg). Noteworthy, DPPH scavenging activity was also recorded for MeOH extract (87.66%) followed by MeOH+EtOAc extract (85.11%). Considerable antioxidant capacity (7.8 ± 0.12 μg AAE/mg) and reducing power (3.1 ± 0.15 μg AAE/mg) was observed in extract of MeOH. The LC50 against brine shrimp and leishmanial parasite was found 9.01 and 12.87 μg/mL for n-Hex and CHCl3 extracts, respectively. The highest zone of inhibition against Streptomyces hyphae formation (12.5 ± 1.77 mm) by n-Hex extract. Growth zone of inhibition 13.8 ± 1.08 mm was recorded for EtOAc and MeOH extracts, respectively against Micrococcus luteus while 10.0 ± 0.11 mm for MeOH extract against Aspergillus flavus. In-vitro cytotoxic assay showed that n-Hex extract had higher cytotoxicity against DU-145 prostate cancer and HL-60 cancer cell lines. NF-kB and MTP potential showed 34.01 and 44.87 μg/mL for n-Hex and CHCl3 extracts, respectively in chemo-preventive potential. Conclusion The study concludes that Arisaema jacquemontii bears significant phytochemical activity and pharmacological activities, this plant can be further explored for isolation of active component against a number of aliments.
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Bakr ZH, Wali Q, Yang S, Yousefsadeh M, Padmasree KP, Ismail J, Ab Rahim MH, Yusoff MM, Jose R. Characteristics of ZnO–SnO2 Composite Nanofibers as a Photoanode in Dye-Sensitized Solar Cells. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03882] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zinab H. Bakr
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Gambang, Kuantan 26300, Malaysia
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Qamar Wali
- NUTECH School of Applied Sciences and Humanities (NUSASH), National University of Technology, Main IJP Road, Sector 1-12, 44000 Islmabad, Pakistan
| | - Shengyuan Yang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China
| | - Maryam Yousefsadeh
- Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran
| | - K. P. Padmasree
- CINVESTAV Unidad Saltillo, Parque Industrial, Ramos Arizpe, Coahuila 25900, Mexico
| | - Jamil Ismail
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Gambang, Kuantan 26300, Malaysia
| | - Mohd Hasbi Ab Rahim
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Gambang, Kuantan 26300, Malaysia
| | - Mashitah Mohd Yusoff
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Gambang, Kuantan 26300, Malaysia
| | - Rajan Jose
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Gambang, Kuantan 26300, Malaysia
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Bakr ZH, Wali Q, Ismail J, Elumalai NK, Uddin A, Jose R. Data of chemical analysis and electrical properties of SnO 2-TiO 2 composite nanofibers. Data Brief 2018; 18:860-863. [PMID: 29900250 PMCID: PMC5996404 DOI: 10.1016/j.dib.2018.03.110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 01/22/2018] [Accepted: 03/23/2018] [Indexed: 11/19/2022] Open
Abstract
In this data article, we provide energy dispersive X-ray spectroscopy (EDX) spectra of the electrospun composite (SnO2-TiO2) nanowires with the elemental values measured in atomic and weight%. The linear sweep voltammetry data of composite and its component nanofibers are provided. The data collected in this article is directly related to our research article “Synergistic combination of electronic and electrical properties of SnO2 and TiO2 in a single SnO2-TiO2 composite nanowire for dye-sensitized solar cells” [1].
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Affiliation(s)
- Zinab H. Bakr
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Science & Technology, Universiti Malaysia Pahang, Gambang, 26300 Kuantan, Malaysia
- Physics Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Qamar Wali
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Science & Technology, Universiti Malaysia Pahang, Gambang, 26300 Kuantan, Malaysia
- Materials Research Laboratory, Department of Physics, University of Peshawar, Peshawar 25120, Pakistan
| | - Jamil Ismail
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Science & Technology, Universiti Malaysia Pahang, Gambang, 26300 Kuantan, Malaysia
| | - Naveen Kumar Elumalai
- School of Photovoltaics and Renewable Energy Engineering, University of New South Wales, Sydney 2052, Australia
| | - Ashraf Uddin
- School of Photovoltaics and Renewable Energy Engineering, University of New South Wales, Sydney 2052, Australia
| | - Rajan Jose
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Science & Technology, Universiti Malaysia Pahang, Gambang, 26300 Kuantan, Malaysia
- Corresponding author.
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Bakr ZH, Wali Q, Ismail J, Elumalai NK, Uddin A, Jose R. Synergistic combination of electronic and electrical properties of SnO2 and TiO2 in a single SnO2-TiO2 composite nanofiber for dye-sensitized solar cells. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.01.074] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Kafi AKM, Wali Q, Jose R, Biswas TK, Yusoff MM. A glassy carbon electrode modified with SnO2 nanofibers, polyaniline and hemoglobin for improved amperometric sensing of hydrogen peroxide. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2479-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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15
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Manshor NA, Wali Q, Wong KK, Muzakir SK, Fakharuddin A, Schmidt-Mende L, Jose R. Humidity versus photo-stability of metal halide perovskite films in a polymer matrix. Phys Chem Chem Phys 2016; 18:21629-39. [DOI: 10.1039/c6cp03600g] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A polymer–perovskite matrix demonstrates enhanced humidity and photo-stability owing to the improved TiO2/perovskite interface.
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Affiliation(s)
- Nurul Ain Manshor
- Nanostructured Renewable Energy Materials Laboratory
- Faculty of Industrial Sciences and Technology (FIST)
- Universiti Malaysia Pahang
- 26300 Kuantan
- Malaysia
| | - Qamar Wali
- Nanostructured Renewable Energy Materials Laboratory
- Faculty of Industrial Sciences and Technology (FIST)
- Universiti Malaysia Pahang
- 26300 Kuantan
- Malaysia
| | - Ka Kan Wong
- Department of Physics
- University of Konstanz
- Konstanz
- Germany
| | - Saifful Kamaluddin Muzakir
- Nanostructured Renewable Energy Materials Laboratory
- Faculty of Industrial Sciences and Technology (FIST)
- Universiti Malaysia Pahang
- 26300 Kuantan
- Malaysia
| | - Azhar Fakharuddin
- Nanostructured Renewable Energy Materials Laboratory
- Faculty of Industrial Sciences and Technology (FIST)
- Universiti Malaysia Pahang
- 26300 Kuantan
- Malaysia
| | | | - Rajan Jose
- Nanostructured Renewable Energy Materials Laboratory
- Faculty of Industrial Sciences and Technology (FIST)
- Universiti Malaysia Pahang
- 26300 Kuantan
- Malaysia
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16
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Fakharuddin A, Palma AL, Di Giacomo F, Casaluci S, Matteocci F, Wali Q, Rauf M, Di Carlo A, Brown TM, Jose R. Solid state perovskite solar modules by vacuum-vapor assisted sequential deposition on Nd:YVO₄ laser patterned rutile TiO₂ nanorods. Nanotechnology 2015; 26:494002. [PMID: 26574237 DOI: 10.1088/0957-4484/26/49/494002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The past few years have witnessed remarkable progress in solution-processed methylammonium lead halide (CH3NH3PbX3, X = halide) perovskite solar cells (PSCs) with reported photoconversion efficiency (η) exceeding 20% in laboratory-scale devices and reaching up to 13% in their large area perovskite solar modules (PSMs). These devices mostly employ mesoporous TiO2 nanoparticles (NPs) as an electron transport layer (ETL) which provides a scaffold on which the perovskite semiconductor can grow. However, limitations exist which are due to trap-limited electron transport and non-complete pore filling. Herein, we have employed TiO2 nanorods (NRs), a material offering a two-fold higher electronic mobility and higher pore-filing compared to their particle analogues, as an ETL. A crucial issue in NRs' patterning over substrates is resolved by using precise Nd:YVO4 laser ablation, and a champion device with η ∼ 8.1% is reported via a simple and low cost vacuum-vapor assisted sequential processing (V-VASP) of a CH3NH3PbI3 film. Our experiments showed a successful demonstration of NRs-based PSMs via the V-VASP technique which can be applied to fabricate large area modules with a pin-hole free, smooth and dense perovskite layer which is required to build high efficiency devices.
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Affiliation(s)
- Azhar Fakharuddin
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences and Technology (FIST), Universiti Malaysia Pahang, 26300 Kuantan, Malaysia. C.H.O.S.E. (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome 'Tor Vergata', via del Politecnico 1, Rome, 00133 Italy
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Ahmed I, Fakharuddin A, Wali Q, Bin Zainun AR, Ismail J, Jose R. Mesoporous titania-vertical nanorod films with interfacial engineering for high performance dye-sensitized solar cells. Nanotechnology 2015; 26:105401. [PMID: 25687409 DOI: 10.1088/0957-4484/26/10/105401] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Working electrode (WE) fabrication offers significant challenges in terms of achieving high-efficiency dye-sensitized solar cells (DSCs). We have combined the beneficial effects of vertical nanorods grown on conducting glass substrate for charge transport and mesoporous particles for dye loading and have achieved a high photoconversion efficiency of (η) > 11% with an internal quantum efficiency of ∼93% in electrode films of thickness ∼7 ± 0.5 μm. Controlling the interface between the vertical nanorods and the mesoporous film is a crucial step in attaining high η. We identify three parameters, viz., large surface area of nanoparticles, increased light scattering of the nanorod-nanoparticle layer, and superior charge transport of nanorods, that simultaneously contribute to the improved photovoltaic performance of the WE developed.
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Affiliation(s)
- Irfan Ahmed
- Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300, Malaysia
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