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Verma A, Sharma G, Kumar A, Dhiman P, Mola GT, Shan A, Si C. Microplastic pollutants in water: A comprehensive review on their remediation by adsorption using various adsorbents. Chemosphere 2024; 352:141365. [PMID: 38331267 DOI: 10.1016/j.chemosphere.2024.141365] [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: 10/16/2023] [Revised: 01/31/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
Microplastics (MPs), as emerging pollutants, have attracted the attention of environmentalists, statespersons, and the scientific community over the last few decades. To address the spread of MPs in the environment, it is imperative to develop various removal techniques and materials that are effective, scalable, and ecologically benign. However, to the best of our knowledge, no review has systematically examined the removal of MPs using adsorption or provided an in-depth discussion on various adsorbents. Adsorption is an inexpensive and effective technology for wastewater treatment. Recently, many researchers have conducted studies on MP remediation using diverse adsorbent materials, such as biochar, activated carbon, sponges, carbon nanotubes, metal-layered oxides, metal-organic frameworks (MOFs), and zeolites. Each adsorbent has advantages and disadvantages. To overcome their disadvantages, researchers have been designing and developing hybrid adsorbents for MP remediation. This review provides insights into these individual adsorbents and also discusses hybrid adsorbents for MP removal. Finally, the review elaborates on future possibilities and ways to enable more efficient, scalable, and environmentally friendly MP cleanup. Overall, this review bridges the gap between contemporary MP remediation using adsorption techniques and adsorbent development.
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Affiliation(s)
- Akshay Verma
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University of Biotechnology and Management Sciences, India
| | - Gaurav Sharma
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University of Biotechnology and Management Sciences, India.
| | - Amit Kumar
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University of Biotechnology and Management Sciences, India
| | - Pooja Dhiman
- International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University of Biotechnology and Management Sciences, India
| | - Genene Tessema Mola
- School of Chemistry & Physics, University of KwaZulu-Natal, Pietermaritzburg, Scottsville, 3209, South Africa
| | - Ali Shan
- College of Materials Science and Engineering, Shenzhen University, 518055, Shenzhen, China
| | - Chuanling Si
- Tianjin Key Laboratory of Pulp and Paper Tianjin University of Science and Technology, Tianjin, 300457, China
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Ogundele AK, Mola GT. Semiconductor quantum dots as a mechanism to enhance charge transfer processes in polymer solar cells. Chemosphere 2023; 345:140453. [PMID: 37844707 DOI: 10.1016/j.chemosphere.2023.140453] [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: 07/31/2023] [Revised: 09/20/2023] [Accepted: 10/12/2023] [Indexed: 10/18/2023]
Abstract
The light trapping capability of thin film polymer solar absorber, composed of poly (3-hexylthiophene) and [6,6]-phenyl C61- butyric acid methyl ester (P3HT:PC60BM) blend, is improved using ZnS semiconductor quantum dots (QD) as third donor-acceptor (D:A) component. The inherent characteristics of the microwave-assisted synthesized ZnS QD, such as quantum size effect, and multiple exciton generation were leveraged in harvesting high energy photons, which resulted in a better exciton generation, dissociation, and effective charge transport in the polymer medium. The synthesized QD exhibited good phase purity, effective kinetic enhancement, and control of the aggregation process. Hence, the impact of ZnS QD on the performance of thin film polymer solar cells (TFPSC) is evident by a remarkable improvement in the measured photovoltaic parameters. Nonetheless, it is observed that the device performances are generally dependent on the concentration of the QD in the absorber layer. Consequently, the power conversion efficiency has increased by 58% at 3% concentration of QDs by weight. This is an interesting development of TFPSC fabricated under an ambient environment.
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Affiliation(s)
- Abiodun Kazeem Ogundele
- School of Chemistry & Physics, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville, 3209, South Africa
| | - Genene Tessema Mola
- School of Chemistry & Physics, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville, 3209, South Africa.
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Ahmed AYA, Ike JN, Hamed MSG, Mola GT. Silver decorated magnesium doped photoactive layer for improved collection of photo‐generated current in polymer solar cell. J Appl Polym Sci 2023. [DOI: 10.1002/app.53697] [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: 02/05/2023]
Affiliation(s)
- Abdallah Y. A. Ahmed
- School of Chemistry and Physics University of KwaZulu‐Natal, Pietermaritzburg Campus King Edward Avenue, Scottsville South Africa
| | - Jude N. Ike
- School of Chemistry and Physics University of KwaZulu‐Natal, Pietermaritzburg Campus King Edward Avenue, Scottsville South Africa
| | - Mohammed S. G. Hamed
- School of Chemistry and Physics University of KwaZulu‐Natal, Pietermaritzburg Campus King Edward Avenue, Scottsville South Africa
| | - Genene Tessema Mola
- School of Chemistry and Physics University of KwaZulu‐Natal, Pietermaritzburg Campus King Edward Avenue, Scottsville South Africa
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Oseni SO, Osifeko OL, Boyo AO, Mola GT. Tri‐metallic quantum dot under the influence of solvent additive for improved performance of polymer solar cells. J Appl Polym Sci 2022. [DOI: 10.1002/app.53293] [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: 11/06/2022]
Affiliation(s)
- Saheed O. Oseni
- Department of Physics Lagos State University Lagos Nigeria
- School of Chemistry & Physics University of KwaZulu‐Natal Scottsville South Africa
| | | | | | - Genene Tessema Mola
- School of Chemistry & Physics University of KwaZulu‐Natal Scottsville South Africa
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Liu M, Zheng Z, Jiang X, Guo F, Mola GT, Gao S, Zhao L, Zhang Y. Fluorinated phenanthrenequinoxaline-based D-A type copolymers for non-fullerene polymer solar cells. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124867] [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: 10/18/2022]
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Dhiman P, Mehta T, Kumar A, Sharma G, Naushad M, Ahamad T, Mola GT. Mg0.5NixZn0.5-xFe2O4 spinel as a sustainable magnetic nano-photocatalyst with dopant driven band shifting and reduced recombination for visible and solar degradation of Reactive Blue-19. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.10.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Sharma S, Sharma G, Kumar A, Naushad M, Mola GT, Kumar A, Al-Misned FA, El-Serehy HA, Stadler FJ. Visibly Active FeO/ZnO@PANI Magnetic Nano-photocatalyst for the Degradation of 3-Aminophenol. Top Catal 2020. [DOI: 10.1007/s11244-020-01294-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Ramalingam G, Ragupathi C, Kaviyarasu K, Letsholathebe D, Mohamed SB, Magdalane CM, Mola GT, Isaev AB, Maaza M. Up-Scalable Synthesis of Size-Controlled White-Green Emitting Behavior of Core/Shell (CdSe/ZnS) Quantum Dots for LED Applications. J Nanosci Nanotechnol 2019; 19:4026-4032. [PMID: 30764965 DOI: 10.1166/jnn.2019.16298] [Citation(s) in RCA: 2] [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: 06/09/2023]
Abstract
Research on CdSe/ZnS core-shell quantum dots (QDs) was synthesized by a chemical route using bio-conjugated organic amino acid (L-Cysteine). The structural, morphological, and optical properties of the nanocrystal powder samples were analyzed using various characterization techniques. The diameter of the resulting QDs was about 3 nm with uniform size distribution. The optical properties QDs exhibited an absorption and emission peak at 515 and 525 nm respectively, at room temperature. The QDs through emission in the spectral range at 516-535 nm is special for their application in green LEDs and white-light generation. The high optical properties performance of the QDs nanocomposites gained indicates that the materials are promising for (LED) applications.
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Affiliation(s)
- G Ramalingam
- Department of Nanoscience and Technology, Science Campus, Alagappa University, Karaikudi 630003, Tamil Nadu, India
| | - C Ragupathi
- Department of Chemistry, Sriram College of Arts and Science, Veempattu, Chennai 602024, India
| | - K Kaviyarasu
- The United Nations Educational, Scientific and Cultural Organization - African Nanotechnology Africa Chair in Nanosciences/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, PO Box 392, Pretoria, South Africa
| | - D Letsholathebe
- Department of Physics, University of Botswana, Private Bag 0022, Gaborone, Botswana
| | - S B Mohamed
- Department of Materials Science, Central University of Tamil Nadu, Neelakudi, Thiruvarur 610005, Tamil Nadu, India
| | - C Maria Magdalane
- Department of Chemistry, St. Xavier's College (Autonomous), Tirunelveli 627002, India
| | - G T Mola
- School of Chemistry and Physics, University of Kwazulu-Natal, Private Bag X01, Scottsville 3209, Pietermaritzburg, South Africa
| | - Abdulgalim B Isaev
- Department of Environmental Chemistry and Technology, Dagestan State University, M. Gadjieva, 43a, 367001, Makhachkala, Russia Federation
| | - M Maaza
- The United Nations Educational, Scientific and Cultural Organization - African Nanotechnology Africa Chair in Nanosciences/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, PO Box 392, Pretoria, South Africa
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Mbuyise XG, Arbab EAA, Mola GT. The effect of a trimetallic nanocomposite in the solar absorber layer of organic solar cells. RSC Adv 2019; 9:6070-6076. [PMID: 35517268 PMCID: PMC9060879 DOI: 10.1039/c8ra08725c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 10/21/2018] [Accepted: 01/22/2019] [Indexed: 12/18/2022] Open
Abstract
Bulk heterojunction (BHJ) organic solar cells were fabricated using a trimetallic nanocomposite (Ag : Zn : Ni) in the photoactive layer. The incorporation of the nanocomposite was limited to the concentrations of 4% and 6% by volume into poly(3-hexylthiophene) (P3HT) and 6-6-phenyl-C61-butyric acid methyl ester (PCBM) blend solar absorber. The newly fabricated devices were investigated in terms of the optical, electrical and morphological properties of the photoactive medium. The power conversion efficiencies (PCE) of the solar cells were found to be increased by 57% and 84% due to improved harvesting of solar radiation due to the occurrence of localized surface plasmon resonance (LSPR) effects of the metal nanocomposite. Silver : zinc : nickel (Ag : Zn : Ni) tri-metallic nanocomposites were synthesized using a chemical reduction method from silver, zinc and nickel nitrates. The nanocomposites were characterized in terms of morphology, elemental composition and crystallinity which are extensively discussed in the manuscript. Bulk heterojunction (BHJ) organic solar cells were fabricated using a trimetallic nanocomposite (Ag : Zn : Ni) in the photoactive layer.![]()
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Affiliation(s)
- Xolani G. Mbuyise
- School of Chemistry & Physics
- University of KwaZulu-Natal
- Scottsville 3209
- South Africa
| | - Elhadi A. A. Arbab
- School of Chemistry & Physics
- University of KwaZulu-Natal
- Scottsville 3209
- South Africa
- Department of Physics
| | - Genene Tessema Mola
- School of Chemistry & Physics
- University of KwaZulu-Natal
- Scottsville 3209
- South Africa
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Kaviyarasu K, Maria Magdalane C, Kanimozhi K, Kennedy J, Siddhardha B, Subba Reddy E, Rotte NK, Sharma CS, Thema FT, Letsholathebe D, Mola GT, Maaza M. Elucidation of photocatalysis, photoluminescence and antibacterial studies of ZnO thin films by spin coating method. J Photochem Photobiol B 2017; 173:466-475. [PMID: 28668515 DOI: 10.1016/j.jphotobiol.2017.06.026] [Citation(s) in RCA: 159] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 06/17/2017] [Accepted: 06/21/2017] [Indexed: 10/19/2022]
Abstract
The ZnO thin films have been prepared by spin coating followed by annealing at different temperatures like 300°C, 350°C, 400°C, 450°C, 500°C & 550°C and ZnO nanoparticles have been used for photocatalytic and antibacterial applications. The morphological investigation and phase analysis of synthesized thin films well characterized by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Photoluminescence (PL), Transmission Electron Microscopy (TEM) and Raman studies. The luminescence peaks detected in the noticeable region between 350nm to 550nm for all synthesized nanosamples are associated to the existence of defects of oxygen sites. The luminescence emission bands are observed at 487nm (blue emission), and 530nm (green emission) at the RT. It is observed that there are no modification positions of PL peaks in all ZnO nanoparticles. In the current attempt, the synthesized ZnO particles have been used photocatalytic and antibacterial applications. The antibacterial activity of characterized samples was regulated using different concentrations of synthesized ZnO particles (100μg/ml, 200μg/ml, 300μg/ml, 400μg/ml, 500μg/ml and 600μg/ml) against gram positive and gram negative bacteria (S. pnemoniae, S. aureus, E. coli and E. hermannii) using agar well diffusion assay. The increase in concentration, decrease in zone of inhibition. The prepared ZnO morphologies showed photocatalytic activity under the sunlight enhancing the degradation rate of Rhodamine-B (RhB), which is one of the common water pollutant released by textile and paper industries.
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Affiliation(s)
- K Kaviyarasu
- UNESCO-UNISA Africa Chair in Nanoscience's/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P O Box 392, Pretoria, South Africa; Nanosciences African Network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), 1 Old Faure Road, 7129, P O Box 722, Somerset West, Western Cape Province, South Africa.
| | - C Maria Magdalane
- Department of Chemistry, St. Xavier's College (Autonomous), Tirunelveli 627002, India; LIFE, Department of Chemistry, Loyola College (Autonomous), Chennai 600034, India
| | - K Kanimozhi
- PG Research & Department of Chemistry, Auxilium College (Autonomous), Vellore, India
| | - J Kennedy
- UNESCO-UNISA Africa Chair in Nanoscience's/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P O Box 392, Pretoria, South Africa; National Isotope Centre, GNS Science, Lower Hutt, New Zealand
| | - B Siddhardha
- Department of Microbiology School of Life Sciences, Pondicherry University, Puducherry 605014, India
| | - E Subba Reddy
- Department of Chemistry, Andhra Loyola College (Autonomous), Vijayawada, Andhra Pradesh 520008, India
| | - Naresh Kumar Rotte
- Department of Chemical Engineering, Indian Institute of Technology, Hyderabad, Kandi, Telangana 502285, India
| | - Chandra Shekhar Sharma
- Department of Chemical Engineering, Indian Institute of Technology, Hyderabad, Kandi, Telangana 502285, India
| | - F T Thema
- UNESCO-UNISA Africa Chair in Nanoscience's/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P O Box 392, Pretoria, South Africa; Nanosciences African Network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), 1 Old Faure Road, 7129, P O Box 722, Somerset West, Western Cape Province, South Africa
| | | | - Genene Tessema Mola
- School of Chemistry and Physics, University of Kwazulu-Natal, Private Bag X01, Scottsville, 3209 Pietermaritzburg, South Africa
| | - M Maaza
- UNESCO-UNISA Africa Chair in Nanoscience's/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P O Box 392, Pretoria, South Africa; Nanosciences African Network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), 1 Old Faure Road, 7129, P O Box 722, Somerset West, Western Cape Province, South Africa
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Kumar A, Shalini, Sharma G, Naushad M, Kumar A, Kalia S, Guo C, Mola GT. Facile hetero-assembly of superparamagnetic Fe3O4/BiVO4 stacked on biochar for solar photo-degradation of methyl paraben and pesticide removal from soil. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.01.010] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sharma G, Kumar D, Kumar A, Al-Muhtaseb AH, Pathania D, Naushad M, Mola GT. Revolution from monometallic to trimetallic nanoparticle composites, various synthesis methods and their applications: A review. Materials Science and Engineering: C 2017; 71:1216-1230. [DOI: 10.1016/j.msec.2016.11.002] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Revised: 09/18/2016] [Accepted: 11/02/2016] [Indexed: 01/02/2023]
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Mola GT, Oseni SO, Kaviyarasu K, Maaza M. Co-solvent additives influence on the performance of PTB7:PCBM based Thin film organic solar cell. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.matpr.2017.10.061] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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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