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Ain QU, Fazal T, Iqbal S, Mahmood S, Ismail B, Shah M, Khan AM, Bahadur A, Alotaibi KM, Alshalwi M. Novel yellowish-green single-phased spinel Mg 1-xBa xAl 2O 4:Mn 2+ phosphor(s) for color rendering white-light-emitting diodes. LUMINESCENCE 2024; 39:e4724. [PMID: 38523053 DOI: 10.1002/bio.4724] [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: 10/20/2023] [Revised: 01/27/2024] [Accepted: 02/26/2024] [Indexed: 03/26/2024]
Abstract
For white light-rendering research activities, interpretation by using colored emitting materials is an alternative approach. But there are issues in designing the white color emitting materials. Particularly, differences in thermal and decay properties of discrete red, green, and blue emitting materials led to the quest for the search of a single-phased material, able to emit primary colors for white light generation. The current study is an effort to design a simple, single-phase, and cost-effective material with the tunable emission of primary colors by a series of Mg1-xBaxAl2O4:Mn2+ nanopowders. Doping of manganese ion (Mn2+) in the presence of the larger barium cation (Ba2+) at tetrahedral-sites of the spinel magnesium aluminate (MgAl2O4) structure led to the creation of antisite defects. Doped samples were found to have lower bandgaps compared with MgAl2O4, and hybridization of 3d-orbitals of Mn2+ with O(2p), Mg(2s)/Al(2s3p) was found to be responsible for narrowing the bandgap. The distribution of cations at various sites at random results in a variety of electronic transitions between the valance band and oxygen vacancies as well as electron traps produced the antisite defects. The suggested compositions might be used in white light applications since they have three emission bands with centers at 516 nm (green), 464 nm (blue) and 622 nm (red) at an excitation wavelength of 380 nm. A detailed discussion to analyze the effects of the larger cationic radius of Ba2+ on the lattice strain, unit cell parameters, and cell volumes using X-ray diffraction analysis is presented.
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Affiliation(s)
- Qurat Ul Ain
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Tanzeela Fazal
- Department of Chemistry, Abbottabad University of Science and Technology, Abbottabad, Pakistan
| | - Shahid Iqbal
- Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, China
| | - Sajid Mahmood
- Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, China
- Functional Materials Group, Gulf University for Science and Technology, Mishref, Kuwait
| | - Bushra Ismail
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Mazloom Shah
- Department of Chemistry, Faculty of Science, Grand Asian University Sialkot, Sialkot, Pakistan
| | - Asad Muhammad Khan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad, Pakistan
| | - Ali Bahadur
- Department of Chemistry, College of Science, Mathematics, and Technology, Wenzhou-Kean University, Wenzhou, China
- Dorothy and George Hennings College of Science, Mathematics and Technology, Kean University, Union, New Jersey, USA
| | - Khalid M Alotaibi
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Matar Alshalwi
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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Younus J, Shahzad W, Ismail B, Fazal T, Shah M, Iqbal S, Jawhari AH, Awwad NS, Ibrahium HA. Engineering the optical properties of nickel sulphide thin films by zinc integration for photovoltaic applications. RSC Adv 2023; 13:27415-27422. [PMID: 37711371 PMCID: PMC10498150 DOI: 10.1039/d3ra04011a] [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: 06/15/2023] [Accepted: 08/25/2023] [Indexed: 09/16/2023] Open
Abstract
Thin films of binary nickel sulphide (NiS) and zinc-doped ternary nickel sulphides (Ni1-xZnxS, where x = 0-1) were effectively produced by the chemical bath deposition method, and their potential use in photovoltaics were investigated. Dopant inclusion did not change the crystal structure of NiS, according to the structural analysis of the synthesized samples. They are appropriate for solar cell applications since the morphological study verified the crack-free deposition. Optical research revealed that the deposited thin films had refractive index (n) ranges between 1.25 and 3.0, extinction coefficient (k) ranges between 0.01 and 0.13, and bandgap values between 2.25 and 2.54 eV. Overall findings indicated that doping is a useful method for modifying the composition, and therefore, the structural and morphological characteristics of NiS thin films, to enhance their optoelectronic behavior.
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Affiliation(s)
- Junaid Younus
- Department of Chemistry, COMSATS University Islamabad (CUI), Abbottabad Campus 22060 Pakistan
| | - Warda Shahzad
- Department of Chemistry, COMSATS University Islamabad (CUI), Abbottabad Campus 22060 Pakistan
| | - Bushra Ismail
- Department of Chemistry, COMSATS University Islamabad (CUI), Abbottabad Campus 22060 Pakistan
| | - Tanzeela Fazal
- Department of Chemistry, Abbottabad University of Science and Technology (AUST) Abbottabad Pakistan
| | - Mazloom Shah
- Department of Chemistry, Faculty of Science, Grand Asian University Sialkot Pakistan
| | - Shahid Iqbal
- Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST) H-12 Islamabad 46000 Pakistan
| | - Ahmed Hussain Jawhari
- Department of Chemistry, Faculty of Science, Jazan University P.O. Box 2097 Jazan 45142 Saudi Arabia
| | - Nasser S Awwad
- Chemistry Department, Faculty of Science, King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
| | - Hala A Ibrahium
- Biology Department, Faculty of Science, King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
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Fazal T, Murtaza BN, Shah M, Iqbal S, Rehman MU, Jaber F, Dera AA, Awwad NS, Ibrahium HA. Recent developments in natural biopolymer based drug delivery systems. RSC Adv 2023; 13:23087-23121. [PMID: 37529365 PMCID: PMC10388836 DOI: 10.1039/d3ra03369d] [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: 05/20/2023] [Accepted: 07/24/2023] [Indexed: 08/03/2023] Open
Abstract
Targeted delivery of drug molecules to diseased sites is a great challenge in pharmaceutical and biomedical sciences. Fabrication of drug delivery systems (DDS) to target and/or diagnose sick cells is an effective means to achieve good therapeutic results along with a minimal toxicological impact on healthy cells. Biopolymers are becoming an important class of materials owing to their biodegradability, good compatibility, non-toxicity, non-immunogenicity, and long blood circulation time and high drug loading ratio for both macros as well as micro-sized drug molecules. This review summarizes the recent trends in biopolymer-based DDS, forecasting their broad future clinical applications. Cellulose chitosan, starch, silk fibroins, collagen, albumin, gelatin, alginate, agar, proteins and peptides have shown potential applications in DDS. A range of synthetic techniques have been reported to design the DDS and are discussed in the current study which is being successfully employed in ocular, dental, transdermal and intranasal delivery systems. Different formulations of DDS are also overviewed in this review article along with synthesis techniques employed for designing the DDS. The possibility of these biopolymer applications points to a new route for creating unique DDS with enhanced therapeutic qualities for scaling up creative formulations up to the clinical level.
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Affiliation(s)
- Tanzeela Fazal
- Department of Chemistry, Abbottabad University of Science and Technology Pakistan
| | - Bibi Nazia Murtaza
- Department of Zoology, Abbottabad University of Science and Technology Pakistan
| | - Mazloom Shah
- Department of Chemistry, Faculty of Science, Grand Asian University Sialkot Pakistan
| | - Shahid Iqbal
- Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST) H-12 Islamabad 46000 Pakistan
| | - Mujaddad-Ur Rehman
- Department of Microbiology, Abbottabad University of Science & Technology Pakistan
| | - Fadi Jaber
- Department of Biomedical Engineering, Ajman University Ajman UAE
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University Ajman UAE
| | - Ayed A Dera
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University Abha Saudi Arabia
| | - Nasser S Awwad
- Chemistry Department, Faculty of Science, King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
| | - Hala A Ibrahium
- Biology Department, Faculty of Science, King Khalid University P.O. Box 9004 Abha 61413 Saudi Arabia
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Fazal T, Iqbal S, Shah M, Ismail B, Shaheen N, Alrbyawi H, Al-Anazy MM, Elkaeed EB, Somaily HH, Pashameah RA, Alzahrani E, Farouk AE. Improvement in Optoelectronic Properties of Bismuth Sulphide Thin Films by Chromium Incorporation at the Orthorhombic Crystal Lattice for Photovoltaic Applications. Molecules 2022; 27:molecules27196419. [PMID: 36234955 PMCID: PMC9570543 DOI: 10.3390/molecules27196419] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 09/23/2022] [Accepted: 09/24/2022] [Indexed: 11/23/2022] Open
Abstract
By using the chemical bath deposition approach, binary bismuth sulphides (Bi2S3) and chromium-doped ternary bismuth sulphides (Bi2−xCrxS3) thin films were effectively produced, and their potential for photovoltaic applications was examined. Structural elucidation revealed that Bi2S3 deposited by this simple and cost-effective method retained its orthorhombic crystal lattice by doping up to 3 at.%. The morphological analysis confirmed the crack-free deposition, hence making them suitable for solar cell applications. Optical analysis showed that deposited thin films have a bandgap in the range of 1.30 to 1.17 eV, values of refractive index (n) from 2.9 to 1.3, and an extinction coefficient (k) from 1.03 to 0.3. From the Hall measurements, it followed that the dominant carriers in all doped and undoped samples are electrons, and the carrier density in doped samples is almost two orders of magnitude larger than in Bi2S3. Hence, this suggests that doping is an effective tool to improve the optoelectronic behavior of Bi2S3 thin films by engineering the compositional, structural, and morphological properties.
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Affiliation(s)
- Tanzeela Fazal
- Department of Chemistry, Abbottabad University of Science and Technology (AUST), Abbottabad 22500, Pakistan
- Correspondence: (T.F.); (S.I.); (B.I.)
| | - Shahid Iqbal
- Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad 46000, Pakistan
- Correspondence: (T.F.); (S.I.); (B.I.)
| | - Mazloom Shah
- Department of Chemistry, Abbottabad University of Science and Technology (AUST), Abbottabad 22500, Pakistan
| | - Bushra Ismail
- Department of Chemistry, COMSATS University Islamabad (CUI), Abbottabad Campus, Islamabad 22060, Pakistan
- Correspondence: (T.F.); (S.I.); (B.I.)
| | - Nusrat Shaheen
- Department of Chemistry, Abbottabad University of Science and Technology (AUST), Abbottabad 22500, Pakistan
| | - Hamad Alrbyawi
- Pharmaceutics and Pharmaceutical Technology Department, College of Pharmacy, Taibah University, Medina 42353, Saudi Arabia
| | - Murefah Mana Al-Anazy
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Eslam B. Elkaeed
- Department of Pharmaceutical Sciences, College of Pharmacy, AlMaarefa University, Riyadh 13713, Saudi Arabia
| | - H. H. Somaily
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Rami Adel Pashameah
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah 24230, Saudi Arabia
| | - Eman Alzahrani
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
| | - Abd-ElAziem Farouk
- Department of Biotechnology College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
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Putra RN, Halim M, Ali G, Shaikh SF, Al-Enizi AM, Fazal T, Jan Iftikhar F, Saqib ANS. High-rate sodium insertion/extraction into silicon oxycarbide-reduced graphene oxide. NEW J CHEM 2020. [DOI: 10.1039/d0nj02993a] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silicone oxycarbide (SiOC) is gaining attention as a potential anode material for lithium-ion batteries due to its higher reversible capacity and high-rate capability.
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Affiliation(s)
- Rio Nugraha Putra
- Center for Water Resource Cycle Research
- Korea Institute of Science and Technology (KIST)
- Seoul 02792
- South Korea
- Division of Energy and Environment Technology
| | - Martin Halim
- Division of Energy and Environment Technology
- KIST School
- Korea University of Science and Technology (UST)
- Seoul 02792
- South Korea
| | - Ghulam Ali
- U.S. Pak Center for Advanced Studies in Energy
- National University of Science and Technology (NUST)
- Islamabad
- Pakistan
| | | | - Abdullah M. Al-Enizi
- Department of Chemistry
- College of Science
- King Saud University
- Riyadh 11451
- Saudi Arabia
| | - Tanzeela Fazal
- Department of Chemistry
- Abbottabad University of Science and Technology
- Abbottabad 22500
- Pakistan
| | - Faiza Jan Iftikhar
- NUTECH School of Applied Sciences and Humanities
- National University of Technology
- Islamabad 44000
- Pakistan
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Muneeb M, Ismail B, Fazal T, Khan RA, Khan AM, Bilal M, Muhammad B, Khan AR. Water treatment by photodegradation on orthorhombic antimony sulfide powder and effect of key operational parameters using methyl orange as a model pollutant. ARAB J CHEM 2018. [DOI: 10.1016/j.arabjc.2015.05.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Muneeb M, Ismail B, Fazal T, Khan AR, Afzia M. Adsorption Assisted Photocatalytic Removal of Methyl Orange by MgAl2O4-Sb2S3 Composite Material. Recent Pat Nanotechnol 2016; 10:213-220. [PMID: 27136926 DOI: 10.2174/1872210510666160429145814] [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] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/30/2015] [Accepted: 04/25/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND The current article is about the water treatment in which colored water contaminated by methyl orange has been used for adsorption assisted photocatalysis. Coupling of photocatalysis with the traditional water treatment processes has been in practice since last couple of years for the improvement of degradation efficiencies, for example, photocatalysis coupled with ultrafilteration, adsorption, flocculation, biological methods, photolysis, membrane distillation, etc. Among all these coupling approaches, adsorption assisted photocatalysis being a very simple and highly efficient approach is suffering from few drawbacks on the account of high cost, low stability and surface area of the adsorbent support. The present study is a contribution towards improvement in this coupling approach. A low cost, highly stable spinel magnesium aluminate (MgAl2O4) material synthesized at nanoscale is used for composite formation with antimony sulphide (Sb2S3) material having high absorption coefficient in the visible light of solar spectrum. A review of recent patents shows that the field of photoctalysis is dominated by the traditional TiO2 catalyst. The modification of TiO2 by either composite formation or by doping is the main focus. METHODS Coprecipitation method is used for the synthesis of spinel in which the desired precursors in the respective molar ratios were mixed and annealing of the resulting precipitates was carried out at 800oC for 8 h. Sb2S3 was synthesized by the hydrothermal method in which the required molar solution of precursors was mixed with urea solution and the whole mixture was maintained at 105oC for 6 hrs in a Teflon lined autoclave. The resulting suspension was then annealed at 37oC for 3 hours. The composite of Sb2S3 and MgAl2O4 has been synthesized by mixing both the materials in 1:1 and heat treated in an oven at a temperature of 200oC. RESULTS Peaks in X-ray diffraction pattern correspond to both the Sb2S3 and spinel phase. All the peaks corresponding to the Sb2S3 and spinel phase were found to be shifted to higher d-spacing values. This indicates the expansion of unit cells of the Sb2S3 and MgAl2O4 phases. Thermal studies show that only 3% weight loss is observed at a temperature of 200-1000oC which may be due to the loss of surface water from the sample. Surface area, pore volume and pore size obtained from N2 adsorption were 143m2/g, 0.21cc/g and 23.26Å, respectively. The removal efficiency of 0.1g catalyst for methyl orange solution of 5mg/L concentration after reaction in dark conditions for the time of one hour was calculated to be 24% owing to the adsorption. The visible light degradation efficiency of the 0.1g catalyst for 1, 5, 19, 25 and 50 mg/L concentrations of MO solutions were 97, 93, 75, 72 and 62% respectively. The dosage of the catalyst was found to have a direct relationship with the degradation efficiency. Lower pH was found suitable for the degradation owing to better interaction of catalyst surface and the adsorbed dye. Percent degradation increased with the increase in the time and temperature of reaction. The degradation kinetics followed pseudo first order rate equation; the calculated value of rate constant was 0.0102 min-1. CONCLUSION The mechanism involves the excitation of electrons in the valence band of Sb2S3 to the conduction band by the absorption of visible and UV light. The electrons and holes participate in the surface reactions resulting in the formation of superoxide and hydroxyl radicals which degrade the targeted polluted. Lower concentration of MO solutions, acidic pH, higher catalyst dosage and greater reaction times were found suitable for the degradation efficiency.
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Affiliation(s)
| | - Bushra Ismail
- Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad-22060, Pakistan.
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