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Mohd Raub AA, Bahru R, Mohamed MA, Latif R, Mohammad Haniff MAS, Simarani K, Yunas J. Photocatalytic activity enhancement of nanostructured metal-oxides photocatalyst: a review. NANOTECHNOLOGY 2024; 35:242004. [PMID: 38484390 DOI: 10.1088/1361-6528/ad33e8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 03/14/2024] [Indexed: 04/04/2024]
Abstract
Nanostructured metal oxide semiconductors have emerged as promising nanoscale photocatalysts due to their excellent photosensitivity, chemical stability, non-toxicity, and biocompatibility. Enhancing the photocatalytic activity of metal oxide is critical in improving their efficiency in radical ion production upon optical exposure for various applications. Therefore, this review paper provides an in-depth analysis of the photocatalytic activity of nanostructured metal oxides, including the photocatalytic mechanism, factors affecting the photocatalytic efficiency, and approaches taken to boost the photocatalytic performance through structure or material modifications. This paper also highlights an overview of the recent applications and discusses the recent advancement of ZnO-based nanocomposite as a promising photocatalytic material for environmental remediation, energy conversion, and biomedical applications.
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Affiliation(s)
- Aini Ayunni Mohd Raub
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, 43600, Selangor, Malaysia
| | - Raihana Bahru
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, 43600, Selangor, Malaysia
| | - Mohd Ambri Mohamed
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, 43600, Selangor, Malaysia
| | - Rhonira Latif
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, 43600, Selangor, Malaysia
| | | | - Khanom Simarani
- Institute of Biological Sciences, Faculty of Science, Universiti Malaya, Kuala Lumpur, 50603, Kuala Lumpur, Malaysia
| | - Jumril Yunas
- Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (UKM), Bangi, 43600, Selangor, Malaysia
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2
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Khan A, Kamal T, Saad M, Ameen F, A Bhat S, Ahamad Khan M, Rahman F. Synthesis and antibacterial activity of nanoenhanced conjugate of Ag-doped ZnO nanorods with graphene oxide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 290:122296. [PMID: 36610211 DOI: 10.1016/j.saa.2022.122296] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/16/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
In this paper, we report a successful synthesis of ZnO nanorods using the microwave-assisted technique, solid-state reaction method was utilized for the preparation of Zn1-xAgxO (x = 0.05, 0.1), Hummer's modified method for graphene oxide (GO) along with the sonication method to prepare GO-based Ag-doped ZnO (Zn1-xAgxO/GO: x = 0.05, 0.1) nanocomposites. These nanorods and nanocomposites were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR), high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy for structural properties, scanning electron microscopy (SEM) along with energy dispersive X-ray (EDX) spectroscopy for morphological analysis, and UV-Vis spectroscopy for optical properties. XRD, FTIR, and Raman measurements substantiated that each sample is well crystallized in the single-phase polycrystalline wurtzite hexagonal structure of ZnO. The average crystallite size is found to be in decreasing order ranges 40 nm to 29 nm, respectively, along with a significant reduction in the optical bandgap. The SEM images showed a clear evidence of nanorods of ZnO, while the EDX spectra verified the presence of Zn, Ag, O, and C elements in the synthesized samples with their nominal percentage. Furthermore, the prepared nanocomposites effectively inhibited the growth ofStaphylococcus aureus and Escherichia coli. In comparison to pure ZnO nanorods, GO-based Ag-doped ZnO nanorods showed improved antibacterial activity against both S. aureus and E. coli.
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Affiliation(s)
- Afroz Khan
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India.
| | - Tausif Kamal
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Md Saad
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Fuad Ameen
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - S A Bhat
- River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Mo Ahamad Khan
- Department of Microbiology, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, UP 202002, India
| | - F Rahman
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India
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3
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Uma B, Anantharaju KS, Surendra BS, Gurushantha K, More SS, Meena S, Hemavathi B, Murthy HCA. Influence of Ag on the Structural, Electrochemical, Antibacterial, and Photocatalytic Performance of the (CuO-Cu 2O)Cu Nanocomposite. ACS OMEGA 2023; 8:9947-9961. [PMID: 36969450 PMCID: PMC10035001 DOI: 10.1021/acsomega.2c07124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
The cost-effective novel Ag-doped (1-7%) (CuO-Cu2O)Cu (C3) heterostructured nanocomposites are successfully synthesized by the facile solution combustion process using the Leucas aspera extract as a green fuel. The structural properties of fabricated nanocomposites were well-characterized by specific spectral techniques for enhanced electrochemical sensor detection, antibacterial activities, and sunlight-driven photocatalytic dye decoloration studies. The existence of Ag+ ions has been confirmed by the appearance of two peaks of Ag 3d5/2 (367.9 eV) and Ag 3d3/2 (373.9 eV), with the chemical binding nature and exchange of the Ag+ state in the nanocomposite lattice as revealed by X-ray photoelectron spectroscopy analysis. The energy band gap value of the doped nanocomposite decreases from 2.2 to 1.8 eV, as measured by the UV-visible absorption spectral technique, hindering the recombination of electron-holes pairs by trapping e- and h+. This result supports that the C3Ag5 nanocomposite has a great potential as a sunlight photocatalyst toward the Alizarin Red (AR) dye, for which an excellent degradation activity of 98% at 180 min was achieved compared to that of the host nanocomposite (78% at 180 min). The variation of redox peak potentials of the prepared graphite nanocomposite working electrode is an effective tool for paracetamol sensing activity in 0.1 M KCl using electrochemical spectral studies. In addition, the antibacterial activities of the C3Ag5 nanocomposite against Escherichia coli and Staphylococcus aureus were successfully studied. The C3Ag5 nanocomposite exhibited a better performance than C3. The increase in activity is attributed to the presence of Ag as a dopant.
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Affiliation(s)
- B. Uma
- Department
of Chemistry, Dayananda Sagar College of
Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru 560111, India
| | - Kurupalya Shivram Anantharaju
- Department
of Chemistry, Dayananda Sagar College of
Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru 560111, India
- Dr.
D. Premachandra Sagar Centre for Advanced Materials (Affiliated to
Mangalore University), DSCE, Bengaluru 560111, India
| | - B. S. Surendra
- Department
of Chemistry, Dayananda Sagar College of
Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru 560111, India
| | - K. Gurushantha
- Department
of Chemistry, M S Ramaiah Institute of Technology, Bengaluru 560054, Karnataka, India
| | - Sunil S. More
- School
of Basic and Applied Sciences, Dayananda
Sagar University, Bangalore 560111, India
| | - S. Meena
- Department
of Chemistry, Dayananda Sagar College of
Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru 560111, India
| | - B. Hemavathi
- Department
of Chemistry, Dayananda Sagar College of
Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bengaluru 560111, India
| | - H. C. Ananda Murthy
- Department
of Applied Chemistry, School of Applied Natural Sciences, Adama Science and Technology University, P.O. Box: 1888, Adama 1888, Ethiopia
- Department
of Prosthodontics, Saveetha Dental College & Hospital, Saveetha
Institute of Medical and Technical Science (SIMATS), Saveetha University, Chennai 600077, Tamil Nadu, India
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Thabit HA, Ismail AK, Kabir NA, Al Mutairi AM, Bafaqeer A, Alraddadi S, Jaji ND, Sayyed M, Al-Ameri SM. Investigation of the thermoluminescence dosimeter characteristics of multilayer ZnO(300 nm)/Ag(50 nm)/ZnO(x) thin films for photonic dosimetry applications. OPTICAL MATERIALS 2023; 137:113548. [DOI: 10.1016/j.optmat.2023.113548] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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5
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Mathew J, John N, Mathew B. Graphene oxide-incorporated silver-based photocatalysts for enhanced degradation of organic toxins: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:16817-16851. [PMID: 36595177 DOI: 10.1007/s11356-022-25026-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
Environmental contamination and scarcity of energy have been deepening over the last few decades. Heterogeneous photocatalysis plays a prominent role in environmental remediation. The failure of earlier metal oxide systems like pure TiO2 and ZnO as stable visible-light photocatalysts demanded more stable catalysts with high photodegradation efficiency. Silver-based semiconductor materials gained popularity as visible-light-responsive photocatalysts with a narrow bandgap. But their large-scale usage in natural water bodies for organic contaminant removal is minimal. The factors like self-photocorrosion and their slight solubility in water have prevented the commercial use. Various efforts have been made to improve their photocatalytic activity. This review focuses on those studies in which silver-based semiconductor materials are integrated with carbonaceous graphene oxide (GO) and reduced graphene oxide (RGO). The decoration of Ag-based semiconductor components on graphene oxide having high-surface area results in binary composites with enhanced visible-light photocatalytic activity and stability. It is found that the introduction of new efficient materials further increases the effectiveness of the system. So binary and ternary composites of GO and Ag-based materials are reviewed in this paper.
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Affiliation(s)
- Jincy Mathew
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India
| | - Neenamol John
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India
| | - Beena Mathew
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam, 686560, Kerala, India.
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6
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Antimicrobial Activity and Cytotoxic Effect of ZnO and Ag-ZnO Nanoparticles Using Capsicum Frutescence Fruits. BIONANOSCIENCE 2023. [DOI: 10.1007/s12668-023-01058-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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7
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Roy TS, Akter S, Fahim MR, Gafur MA, Ferdous T. Incorporation of Ag-doped ZnO nanorod through Graphite hybridization: Effective approach for degradation of Ciprofloxacin. Heliyon 2023; 9:e13130. [PMID: 36846701 PMCID: PMC9950824 DOI: 10.1016/j.heliyon.2023.e13130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 01/22/2023] Open
Abstract
To remove the Ciprofloxacin (CIP) from aqueous solution, ZnO-Ag-Gp nanocomposite exhibited efficient photocatalytic properties. The biopersistent CIP is pervasive in surface water and also hazardous to human and animal health. This study utilized the hydrothermal technique to prepare Ag-doped ZnO hybridizing Graphite (Gp) sheet (ZnO-Ag-Gp) to degrade pharmaceuticals pollutant CIP from an aqueous medium. The structural and chemical compositions of the photocatalysts were determined by XRD, FTIR and XPS analysis. FESEM and TEM images revealed the nanorod ZnO with round shape Ag distributed on a Gp surface. The reduced bandgap of the ZnO-Ag-Gp sample enhanced the photocatalytic property which was measured by using UV-vis Spectroscopy. Dose optimization study found that 1.2 g/L is optimum for single (ZnO) and binary (ZnO-Gp and ZnO-Ag), where 0.3 g/L ternary (ZnO-Ag-Gp) exhibited maximum degradation efficiency (98%) within 60 min for 5 mg/L CIP. Pseudo 1st order reaction kinetics rate was found highest for ZnO-Ag-Gp (0.05983 min-1) and it decreased to 0.03428 min-1 for annealed sample. Removal efficiency decreased to only 90.97% at 5th run and hydroxyl radicals played a vital role to degrade CIP from aqueous solution. UV/ZnO-Ag-Gp will be a promising technique to degrade wide-ranging pharmaceutical antibiotics from the aquatic medium.
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Affiliation(s)
- Tanu Shree Roy
- Department of Physics, Bangladesh University of Textiles, Dhaka, Bangladesh,Department of Physics, Jahangirnagar University, Savar Union, Bangladesh
| | - Surya Akter
- Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh,Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
| | - Monabbir Rafsan Fahim
- Department of Textile Engineering Management, Bangladesh University of Textiles, Dhaka, Bangladesh
| | - Md. Abdul Gafur
- Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh,Corresponding author.
| | - Tahmina Ferdous
- Department of Physics, Jahangirnagar University, Savar Union, Bangladesh
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Zang C, Chen H, Han X, Zhang W, Wu J, Liang F, Dai J, Liu H, Zhang G, Zhang KQ, Ge M. Rational construction of ZnO/CuS heterostructures-modified PVDF nanofiber photocatalysts with enhanced photocatalytic activity. RSC Adv 2022; 12:34107-34116. [PMID: 36544997 PMCID: PMC9706242 DOI: 10.1039/d2ra06151a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/23/2022] [Indexed: 11/30/2022] Open
Abstract
PVDF/ZnO/CuS photocatalysts with ZnO/CuS heterojunctions were synthesized via electrospinning, hydrothermal, and ion-exchange techniques. As matrix materials, electrospun PVDF nanofibers are easy to be recycled and reused. ZnO nanorods anchored on PVDF nanofiber with high specific surface area provide abundant active reaction sites for photocatalysis. While the loaded CuS nanoparticles as a photosensitizer compensate the low quantum efficiency of ZnO and improve the visible-light photocatalytic efficiency. As a result, the PVDF/ZnO/CuS composited photocatalyst exhibits outstanding photocatalytic performance in exposure to UV and visible light owing to the suppressed recombination of electron-hole pairs and widened visible light absorption range. The kinetic constants of PVDF/ZnO/CuS nanocomposites under UV irradiation (9.01 × 10-3 min-1) and visible light (6.53 × 10-3 min-1) irradiation were 3.66 and 2.53 times higher than that of PVDF/ZnO (2.46 × 10-3 min-1 & 2.58 × 10-3 min-1), respectively. Furthermore, PVDF/ZnO/CuS nanocomposites demonstrate excellent robustness in terms of recycling and reuse, which is advantageous in practical applications.
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Affiliation(s)
- Chuanfeng Zang
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Hao Chen
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Xiangye Han
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Wei Zhang
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Junfang Wu
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Fanghua Liang
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Jiamu Dai
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Hongchao Liu
- Institute of Applied Physics and Materials Engineering, University of MacauMacau 999078P. R. China
| | - Guangyu Zhang
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China
| | - Ke-Qin Zhang
- Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production, National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow UniversitySuzhou 215123P. R. China
| | - Mingzheng Ge
- School of Textile and Clothing, Nantong UniversityNantong 226019P. R. China,Institute of Applied Physics and Materials Engineering, University of MacauMacau 999078P. R. China,Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction and Cleaner Production, National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow UniversitySuzhou 215123P. R. China
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9
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Li C, Sun H, Jin H, Li W, Liu JL, Bashir S. Performance of ferroelectric visible light type II Ag10Si4O13/TiO2 heterojunction photocatalyst. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.03.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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10
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Eco-friendly hetero-system silver decorated nanocomposite zinc oxide/reduced graphene oxide: improved broad-ranged absorptivity and enhanced photocatalytic performance under white-light irradiation. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-022-02266-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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11
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Photochemistry of ZnO/GeO2 film for H2 production. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Palladium and Graphene Oxide Doped ZnO for Aqueous Acetamiprid Degradation under Visible Light. Catalysts 2022. [DOI: 10.3390/catal12070709] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Acetamiprid is a neonicotinoid insecticide widely used in pest control. In recent years, it has been considered as a contaminant in groundwater, lakes, and rivers. Photocatalysis under visible light radiation proved to be an effective process for getting rid of several organic pollutants. In the present work, photodegradation of aqueous acetamiprid was investigated over bare zinc oxide (ZnO) photocatalyst as well as ZnO doped with either palladium or palladium combined with graphene oxide. Both ZnO and doped-ZnO were synthesized via a microwave-assisted hydrothermal procedure. The obtained photocatalysts were characterized using different techniques. After 5 h of reaction at ambient temperature under visible light irradiation, acetamiprid conversions attained ca. 38, 82, and 98% in the presence of bare ZnO, Pd-doped ZnO and Pd-GO-doped ZnO photocatalysts, respectively, thus demonstrating the positive effect of Pd- and GO-doping on the photocatalytic activity of ZnO. In addition, Pd-GO-doped ZnO was shown to keep its activity even when it is recycled five times, thus proving its stability in the reaction medium.
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Venkatesh N, Sakthivel P. Efficient degradation of azo dye pollutants on Zn doped SnO2 photocatalyst under sunlight irradiation: Performance, mechanism and toxicity evaluation. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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14
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Ehsan M, Waheed A, Ullah A, Kazmi A, Ali A, Raja NI, Mashwani ZUR, Sultana T, Mustafa N, Ikram M, Li H. Plant-Based Bimetallic Silver-Zinc Oxide Nanoparticles: A Comprehensive Perspective of Synthesis, Biomedical Applications, and Future Trends. BIOMED RESEARCH INTERNATIONAL 2022; 2022:1215183. [PMID: 35535038 PMCID: PMC9078794 DOI: 10.1155/2022/1215183] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/26/2022] [Accepted: 04/07/2022] [Indexed: 12/17/2022]
Abstract
The universal emphasis on the study of green nanotechnology has led to biologically harmless uses of wide-ranged nanomaterials. Nanotechnology deals with the production of nanosized particles with regular morphology and properties. Various researches have been directed on nanomaterial synthesis by physical, chemical, and biological means. Understanding the safety of both environment and in vivo, a biogenic approach particularly plant-derived synthesis is the best strategy. Silver-zinc oxide nanoparticles are most effective. Moreover, these engineered nanomaterials via morphological modifications attain improved performance in antimicrobial, biomedical, environmental, and therapeutic applications. This article evaluates manufacturing strategies for silver-zinc oxide nanoparticles via plant-derived means along with highlighting their broad range of uses in bionanotechnology.
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Affiliation(s)
- Maria Ehsan
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Abdul Waheed
- Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China
| | - Abd Ullah
- Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology & Geography, Chinese Academy of Sciences, Urumqi 830011, China
- Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
- Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele 848300, China
- College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Abeer Kazmi
- Department of Biotechnology, Faculty of Chemical and Life Sciences, Abdul Wali Khan University Mardan (AWKUM), Mardan, Pakistan
- Department of Genetics, Institute of Hydrobiology, University of Chinese Academy of Sciences (UCAS), Wuhan, China
| | - Amir Ali
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Naveed Iqbal Raja
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | | | - Tahira Sultana
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Nilofar Mustafa
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Muhammad Ikram
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Pakistan
| | - Huanyong Li
- Binzhou Vocational College, Binzhou 256603, China
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15
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Nasir A, Mazare A, Zhou X, Qin S, Denisov N, Zdrazil L, Kment Š, Zboril R, Yasin T, Schmuki P. Photocatalytic Synthesis of Oxidized Graphite Enabled by Grey TiO
2
and Direct Formation of a Visible‐Light‐Active Titania/Graphene Oxide Nanocomposite. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202100274] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Amara Nasir
- Pakistan Institute of Engineering and Applied Sciences (PIEAS) PO Nilore 45650 Islamabad Pakistan
- Department of Materials Science WW4-LKO Friedrich Alexander University of Erlangen Nürnberg Martensstrasse 7 91058 Erlangen Germany
| | - Anca Mazare
- Department of Materials Science WW4-LKO Friedrich Alexander University of Erlangen Nürnberg Martensstrasse 7 91058 Erlangen Germany
- Advanced Institute for Materials Research (AIMR) National University Corporation Tohoku University 980-8577 Sendai Japan
| | - Xin Zhou
- Department of Materials Science WW4-LKO Friedrich Alexander University of Erlangen Nürnberg Martensstrasse 7 91058 Erlangen Germany
| | - Shanshan Qin
- Department of Materials Science WW4-LKO Friedrich Alexander University of Erlangen Nürnberg Martensstrasse 7 91058 Erlangen Germany
| | - Nikita Denisov
- Department of Materials Science WW4-LKO Friedrich Alexander University of Erlangen Nürnberg Martensstrasse 7 91058 Erlangen Germany
| | - Lukas Zdrazil
- Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute Palacký University Křížkovského 511/8 77900 Olomouc Czech Republic
- Department of Physical Chemistry Faculty of Science Palacký University 17 Listopadu 12 71146 Olomouc Czech Republic
| | - Štěpán Kment
- Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute Palacký University Křížkovského 511/8 77900 Olomouc Czech Republic
- Nanotechnology Centre, Centre of Energy and Environmental Technologies – CEET VŠB−Technical University of Ostrava 17. Listopadu 2172/15 70800 Ostrava-Poruba Czech Republic
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute Palacký University Křížkovského 511/8 77900 Olomouc Czech Republic
- Nanotechnology Centre, Centre of Energy and Environmental Technologies – CEET VŠB−Technical University of Ostrava 17. Listopadu 2172/15 70800 Ostrava-Poruba Czech Republic
| | - Tariq Yasin
- Pakistan Institute of Engineering and Applied Sciences (PIEAS) PO Nilore 45650 Islamabad Pakistan
| | - Patrik Schmuki
- Department of Materials Science WW4-LKO Friedrich Alexander University of Erlangen Nürnberg Martensstrasse 7 91058 Erlangen Germany
- Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute Palacký University Křížkovského 511/8 77900 Olomouc Czech Republic
- Department of Chemistry, Faculty of Science King Abdulaziz University P.O. Box 80203 Jeddah 21569 Saudi Arabia
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16
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Construction of Co-doped NiS/S-g-C3N4 heterojunction for boosting degradation of dye and inactivation of pathogens in visible light. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Iqbal S, Javed M, Hassan SS, Nadeem S, Akbar A, Alotaibi MT, Alzhrani RM, Awwad NS, Ibrahium HA, Mohyuddin A. Binary Co@ZF/S@GCN S-scheme heterojunction enriching spatial charge carrier separation for efficient removal of organic pollutants under sunlight irradiation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128177] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Elumalai N, Prabhu S, Selvaraj M, Silambarasan A, Navaneethan M, Harish S, Ramu P, Ramesh R. Enhanced photocatalytic activity of ZnO hexagonal tube/r-GO composite on degradation of organic aqueous pollutant and study of charge transport properties. CHEMOSPHERE 2022; 291:132782. [PMID: 34748798 DOI: 10.1016/j.chemosphere.2021.132782] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 10/11/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
ZnO hexagonal tube and ZnO/r-GO nanocomposites were synthesized by hydrothermal method and the nanostructures were characterized by XRD, UV-DRS, PL, FTIR, FESEM, and TEM techniques. The main violet emission peak of the synthesized nanostructures is due to the transition between interstitial zinc and hole (valence band) of ZnO. The potential of ZnO/r-GO nanocomposite was evaluated using methyl orange (MO) and rhodamine-B (RhB), and the results were compared with the activity of synthesized ZnO nanostructures. More than 95% of MO and RhB were by ZnO/r-GO nanocomposite and it was found to be higher than that of ZnO hexagonal tube. The degradation MO and RhB were found to follow first-order kinetics and it has a rate constant of 7.68 × 10-2and 7.83 × 10-2 min-1, respectively. These results are mainly due to the enhanced charge transport property. Trapping experiments show that superoxide radical anion and hydroxide radicals are chief species responsible for the degradation of MO and RhB. The chemical stability of the nanocomposite was evaluated by cycle test experiments and it reveals that the catalyst can be reused up to few cycles without considerable loss of photocatalytic activity. This work affords a simple stratagem to integrate ZnO hexagonal tubes and r-GO nanosheets to construct effective catalysts for the degradation of organic compounds.
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Affiliation(s)
- N Elumalai
- Department of Physics, Government Arts College (Autonomous), Salem, 7, Tamil Nadu, India; Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India
| | - S Prabhu
- Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India
| | - M Selvaraj
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, 61413, Saudi Arabia.
| | - A Silambarasan
- Department of Chemistry, Vivekanandha College of Arts and Sciences for Women (Autonomous), Elayampalayam, Namakkal, 637 205, Tamil Nadu, India.
| | - M Navaneethan
- Nanotechnology Research Centre, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India; Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India.
| | - S Harish
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kanchepuram, Tamil Nadu, India
| | - P Ramu
- Department of Physics, Government Arts College (Autonomous), Salem, 7, Tamil Nadu, India.
| | - R Ramesh
- Department of Physics, Periyar University, Salem, 11, Tamil Nadu, India.
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Abubshait HA, Iqbal S, Abubshait SA, Alotaibi MT, Alwadai N, Alfryyan N, Alsaab HO, Awwad NS, Ibrahium HA. A well-defined S-g-C3N4/Cu–NiS heterojunction interface towards enhanced spatial charge separation with excellent photocatalytic ability: synergetic effect, kinetics, antibacterial activity, and mechanism insights. RSC Adv 2022; 12:3274-3286. [PMID: 35425388 PMCID: PMC8979347 DOI: 10.1039/d1ra07974c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Accepted: 01/02/2022] [Indexed: 12/22/2022] Open
Abstract
A well-defined heterojunction among two dissimilar semiconductors exhibited enhanced photocatalytic performance owing to its capability for boosting the photoinduced electron/hole pair transportation. Therefore, designing and developing such heterojunctions using diverse semiconductor-based materials to enhance the photocatalytic ability employing various approaches have gained research attention. For this objective, g-C3N4 is considered as a potential photocatalytic material for organic dye degradation; however, the rapid recombination rate of photoinduced charge carriers restricts the widespread applications of g-C3N4. Henceforth, in the current study, we constructed a heterojunction of S-g-C3N4/Cu–NiS (SCN/CNS) two-dimensional/one-dimensional (2D/1D) binary nanocomposites (NCs) by a self-assembly approach. XRD results confirm the construction of 22% SCN/7CNS binary NCs. TEM analysis demonstrates that binary NCs comprise Cu–NiS nanorods (NRs) integrated with nanosheets (NSs) such as the morphology of SCN. The observed bandgap value of SCN is 2.69 eV; nevertheless, the SCN/CNS binary NCs shift the bandgap to 2.63 eV. Photoluminescence spectral analysis displays that the electron–hole pair recombination rate in the SCN/CNS binary NCs is excellently reduced owing to the construction of the well-defined heterojunction. The photoelectrochemical observations illustrate that SCN/CNS binary NCs improve the photocurrent to ∼0.66 mA and efficiently suppress the electron–hole pairs when compared with that of undoped NiS, CNS and SCN. Therefore, the 22% SCN/7CNS binary NCs efficiently improved methylene blue (MB) degradation to 99% for 32 min under visible light irradiation. A well-refined heterointerface combination of a 2D/1D SCN/CNS binary heterojunction is developed.![]()
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Affiliation(s)
- Haya A. Abubshait
- Basic Sciences Department, Deanship of Preparatory Year and Supporting Studies, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam 31441, Saudi Arabia
| | - Shahid Iqbal
- Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad, 46000, Pakistan
| | - Samar A. Abubshait
- Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, P. O. Box 1982, Dammam 31441, Saudi Arabia
| | - Mohammed T. Alotaibi
- Department of Chemistry, Turabah University College, Taif University, P. O. Box 11099, Taif 21944, Saudi Arabia
| | - Norah Alwadai
- Department of Physics, College of Sciences, Princess Nourah Bint Abdulrahman University, P. O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Nada Alfryyan
- Department of Physics, College of Sciences, Princess Nourah Bint Abdulrahman University, P. O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Hashem O. Alsaab
- Department of Pharmaceutics and Pharmaceutical Technology, Taif University, P. O. Box 11099, Taif 21944, 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
- Department of Semi Pilot Plant, Nuclear Materials Authority, P. O. Box 530, El Maadi, Egypt
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20
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Ha Pham TT, Vu XH, Dien ND, Trang TT, Kim Chi TT, Phuong PH, Nghia NT. Ag nanoparticles on ZnO nanoplates as a hybrid SERS-active substrate for trace detection of methylene blue. RSC Adv 2022; 12:7850-7863. [PMID: 35424719 PMCID: PMC8982176 DOI: 10.1039/d2ra00620k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/03/2022] [Indexed: 12/13/2022] Open
Abstract
Decorating two-dimensional (2D) nanomaterials with nanoparticles provides an effective method to integrate their physicochemical properties. In this work, we present the hydrothermal growth process of 2D zinc oxide nanoplates (ZnO NPls), then silver nanoparticles (AgNPs) were uniformly distributed on the surface of ZnO NPls through the reduction procedure of silver nitrate with sodium borohydride to create a metal–semiconductor hybrid. The amount of AgNPs on the ZnO NPls' surface was carefully controlled by varying the volume of silver nitrate (AgNO3) solution. Moreover, the effect of AgNPs on the surface-enhanced Raman scattering (SERS) property of ZnO NPls was thoroughly investigated by using methylene blue (MB) as the target molecule. After calculation, the maximum enhancement factor value for 10−4 M of MB reached 6.2 × 106 for the peak at 1436 cm−1 and the limit of detection was 10−9 M. In addition, the hybrid nanosystem could distinguish MB with good reproducibility over a wide range of concentrations, from 10−9 to 10−4 M. The SERS mechanism is well elucidated based on the chemical and electromagnetic mechanisms related to the synergism of ZnO and Ag in the enhancement of Raman signal. Abundant hot spots located at the gap between adjacent separate Ag nanoparticles and ZnO nanoplates which formed a strong local electromagnetic field and electron transfer between ZnO and Ag are considered to be the key factors affecting the SERS performance of our prepared ZnO/Ag substrates. In this research, we found high sensitivity of ZnO nanoplates/Ag nanoparticles in detecting MB molecules. This unique metal–semiconductor hybrid nanosystem is advantageous for the formation of Raman signals and is thus suitable for the trace detection of methylene blue. Decorating two-dimensional (2D) nanomaterials with nanoparticles provides an effective method to integrate their physicochemical properties.![]()
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Affiliation(s)
- Thi Thu Ha Pham
- Faculty of Chemistry, TNU-University of Sciences, Tan Thinh ward, Thai Nguyen city, Vietnam
| | - Xuan Hoa Vu
- Institute of Science and Technology, TNU-University of Sciences, Tan Thinh ward, Thai Nguyen city, Vietnam
| | - Nguyen Dac Dien
- Faculty of Labour Protection, Vietnam Trade Union University, 169 Tay Son street, Hanoi city, Vietnam
| | - Tran Thu Trang
- Institute of Science and Technology, TNU-University of Sciences, Tan Thinh ward, Thai Nguyen city, Vietnam
| | - Tran Thi Kim Chi
- Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Pham Ha Phuong
- 31 Electro Mechanism and Explosive one Member Limited Liability Company, Bai Bong ward, Pho Yen Town, Thai Nguyen Province, Vietnam
| | - Nguyen Trong Nghia
- Center for Quantum and Electronics, Institute of Physics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
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21
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Zhou W, Yu B, Zhu J, Li K, Tian S. Enhanced photocatalytic activities of a hierarchical ZnO/V 2C MXene hybrid with a close coupling heterojunction for the degradation of methyl orange, phenol and methylene blue dye. NEW J CHEM 2022. [DOI: 10.1039/d2nj02658a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hierarchical ZnO/V2C MXene hybrid exhibited enhanced photocatalytic performance due to its close coupling heterojunction facilitating photo-generated carrier transfer.
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Affiliation(s)
- Weibing Zhou
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
| | - Bo Yu
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
| | - Jiaoqun Zhu
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, Hubei, China
| | - Kang Li
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China
| | - Shouqin Tian
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, Hubei, China
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22
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Bahadur A, Iqbal S, Javed M, Hassan SS, Nadeem S, Akbar A, Alzhrani RM, Al-Anazy MM, Elkaeed EB, Awwad NS, Ibrahium HA, Mohyuddin A. Construction of a binary S-scheme S-g-C 3N 4/Co-ZF heterojunction with enhanced spatial charge separation for sunlight-driven photocatalytic performance. RSC Adv 2022; 12:23263-23273. [PMID: 36090406 PMCID: PMC9380560 DOI: 10.1039/d1ra08525e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 08/08/2022] [Indexed: 11/21/2022] Open
Abstract
A novel S-scheme photocatalyst system is constructed utilizing the hydrothermal technique and S-g-C3N4/Co-ZF binary material.
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Affiliation(s)
- Ali Bahadur
- Department of Chemistry, College of Science and Technology, Wenzhou-Kean University, Wenzhou, China
| | - Shahid Iqbal
- Department of Chemistry, School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad, 46000, Pakistan
| | - Mohsin Javed
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, Pakistan
| | - Syeda Saba Hassan
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, Pakistan
| | - Sohail Nadeem
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, Pakistan
| | - Ali Akbar
- Department of Physics, University of Agriculture Faisalabad (UAF), Faisalabad, Punjab, 38000, Pakistan
| | - Rami M. Alzhrani
- Department of Pharmaceutics and Industrial Pharmacy, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, 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
| | - 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
- Department of Semi Pilot Plant, Nuclear Materials Authority, P.O. Box 530, El Maadi, Egypt
| | - Ayesha Mohyuddin
- Department of Chemistry, School of Science, University of Management and Technology, Lahore, Pakistan
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23
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Kumar D, Sharma S, Khare N. RGO nanosheets coupled NaNbO3 nanorods based nanocomposite for enhanced photocatalytic and photoelectrochemical water splitting activity. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.10.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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24
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Dai Y, Guo Y, Wang J, Li Y, Zhang L, Liu X. A vertically configured photocatalytic-microbial fuel cell for electricity generation and gaseous toluene degradation. CHEMOSPHERE 2021; 285:131530. [PMID: 34273692 DOI: 10.1016/j.chemosphere.2021.131530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 07/01/2021] [Accepted: 07/09/2021] [Indexed: 06/13/2023]
Abstract
A vertically configured photocatalytic-microbial fuel cell (photo-MFC) is developed by combining a nanodiamond-decorated ZnO (ZnO/ND) photocathode with a bioanode. The system can effectively couple the light energy with bioenergy to enhance the degradation of volatile organic compounds (VOCs) and boost electricity output. Results show that the composite system exhibits increased performance for toluene removal (60.65%), higher than those of individual parts (ZnO/ND-photocatalysis: 37.16%, MFC: 17.81%). Furthermore, its electrochemical performance is dramatically increased. The peak power density of 120 mW/m2 and the current density of 1.07 A/m2 are generated under light illumination, which are about 1.57-fold and 1.37-fold higher than that under dark (76 mW/m2, 0.78 A/m2), respectively. Microbial community analysis demonstrates Proteobacteria and Firmicute are dominant phyla, implying they play important roles on accelerating the extracellular-electron transfer and toluene degradation. In addition, the underlying mechanism for toluene degradation in the photo-MFC system is preliminary explored. Our results suggest that the photo-MFC has great potential for simultaneous treatment of VOCs with energy recovery.
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Affiliation(s)
- Yexin Dai
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300354, PR China
| | - Yajing Guo
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300354, PR China
| | - Jiao Wang
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300354, PR China
| | - Yunxue Li
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300354, PR China
| | - Lei Zhang
- School of Life Science, Tianjin University, Tianjin, 300372, PR China
| | - Xianhua Liu
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, 300354, PR China.
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25
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Effective heterointerface combination of 1D/2D Co-NiS/S-g-C3N4 heterojunction for boosting spatial charge separation with enhanced photocatalytic degradation of organic pollutants and disinfection of pathogens. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127390] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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26
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Paria D, Vadakkumbatt V, Ravindra P, Avasthi S, Ghosh A. Unconventional plasmonic sensitization of graphene in mid-infrared. NANOTECHNOLOGY 2021; 32:315202. [PMID: 33873164 DOI: 10.1088/1361-6528/abf96c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
Light-matter interaction in graphene can be engineered and substantially enhanced through plasmonic sensitization, which has led to numerous applications in photodetection, sensing, photocatalysis and spectroscopy. The majority of these designs have relied on conventional plasmonic materials such as gold, silver and aluminum. This limits the implementation of such devices to the ultraviolet and visible regimes of the electromagnetic spectrum. However, for many practical applications, including those relevant to security and defense, the development of new strategies and materials for sensing and detection of infra red (IR) light is crucial. Here we use surface enhanced Raman spectroscopy (SERS), for direct visualization and estimation of enhanced light-matter interaction in graphene in the mid-IR regime, through sensitization by an unconventional plasmonic material. Specifically, we fabricate a hybrid device consisting of a single layer graphene and a two-dimensional array of nanodiscs of aluminum doped zinc oxide (AZO), which is a highly doped semiconductor, exhibiting plasmonic resonance in the mid-IR. We find that the enhancement in the SERS signal of graphene is of similar magnitude to what has been achieved previously in the visible using conventional plasmonic materials. Our results establish the potential of such hybrid systems for graphene-based optical and optoelectronic applications in the mid-IR.
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Affiliation(s)
- Debadrita Paria
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | | | - Pramod Ravindra
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Sushobhan Avasthi
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Ambarish Ghosh
- Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India
- Department of Physics, Indian Institute of Science, Bangalore 560012, India
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27
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Qumar U, Hassan J, Naz S, Haider A, Raza A, Ul-Hamid A, Haider J, Shahzadi I, Ahmad I, Ikram M. Silver decorated 2D nanosheets of GO and MoS 2serve as nanocatalyst for water treatment and antimicrobial applications as ascertained with molecular docking evaluation. NANOTECHNOLOGY 2021; 32:255704. [PMID: 33556921 DOI: 10.1088/1361-6528/abe43c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Accepted: 02/08/2021] [Indexed: 06/12/2023]
Abstract
In this work, synthesis of graphene oxide (GO) and reduced graphene oxide (rGO) was realized through a modified Hummers route. Different concentrations (5 and 10 wt%) of Ag were doped in MoS2and rGO using a hydrothermal technique. Synthesized Ag-MoS2and Ag-rGO were evaluated through XRD that confirmed the hexagonal structure of MoS2along with the transformation of GO to Ag-rGO as indicated by a shift in XRD peaks while Mo-O bonding and S=O functional groups were confirmed with FTIR. Morphological information of GO and formation of MoS2nanopetals as well as interlayer spacing were verified through FESEM and HRTEM respectively. Raman analysis was employed to probe any evidence regarding defect densities of GO. Optical properties of GO, MoS2, Ag-rGO, and Ag-MoS2were visualized through UV-vis and PL spectroscopy. Prepared products were employed as nanocatalysts to purify industrial wastewater. Experimental results revealed that Ag-rGO and Ag-MoS2showed 99% and 80% response in photocatalytic activity. Besides, the nanocatalyst (Ag-MoS2and Ag-rGO) exhibited 6.05 mm inhibition zones againstS. aureusgram positive (G+) and 3.05 mm forE. coligram negative (G-) in antibacterial activity. To rationalize biocidal mechanism of Ag-doped MoS2NPs and Ag-rGO,in silicomolecular docking study was employed for two enzymes i.e.β-lactamase and D-alanine-D-alanine ligase B (ddlB) from cell wall biosynthetic pathway and enoyl-[acylcarrier-protein] reductase (FabI) from fatty acid biosynthetic pathway belonging toS. aureus. The present study provides evidence for the development of cost-effective, environment friendly and viable candidate for photocatalytic and antimicrobial applications.
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Affiliation(s)
- U Qumar
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - J Hassan
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - S Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, People's Republic of China
| | - A Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences, Lahore 54000, Punjab, Pakistan
| | - A Raza
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - A Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
| | - J Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, People's Republic of China
| | - I Shahzadi
- College of Pharmacy, University of the Punjab, Lahore, 54000, Pakistan
| | - I Ahmad
- Department of Chemistry, Allama Iqbal Open University, Islamabad 44000, Pakistan
| | - M Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, 54000, Punjab, Pakistan
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28
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Koutavarapu R, Reddy CV, Syed K, Reddy KR, Shetti NP, Aminabhavi TM, Shim J. Ultra-small zinc oxide nanosheets anchored onto sodium bismuth sulfide nanoribbons as solar-driven photocatalysts for removal of toxic pollutants and phtotoelectrocatalytic water oxidation. CHEMOSPHERE 2021; 267:128559. [PMID: 33070978 DOI: 10.1016/j.chemosphere.2020.128559] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 09/24/2020] [Accepted: 10/04/2020] [Indexed: 06/11/2023]
Abstract
Heterostructured nanohybrids were prepared from sodium bismuth sulfide (NaBiS2) and zinc oxide (ZnO) through hydrothermal process. The nanocomposite was used for tetracycline (TC) degradation as well as photoelectrochemical (PEC) water oxidation. Morphology and structural analyses were performed to confirm the dispersion of ultra-small ZnO nanosheets into the NaBiS2 nanoribbons. By tuning the band gap, it was possible to degrade tetracycline toxic pollutant within 90 min under the simulated solar light irradiation, while PEC suggested a lower charge-transfer resistance, high photocurrent response, and exceptionally good stability. The highest photocurrent density of 0.751 mAcm-2 vs. Ag/AgCl in 0.1 M Na2SO3 solution was observed under solar-light illumination. Detailed photocatalytic mechanisms for the degradation of TC and PEC water oxidation are discussed.
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Affiliation(s)
| | - Ch Venkata Reddy
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
| | - Kamaluddin Syed
- Department of Mechanical Engineering, Vignan's Institute of Information Technology, Visakhapatnam, 530049, A.P., India
| | - Kakarla Raghava Reddy
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.
| | - Nagaraj P Shetti
- Center for Electrochemical Science & Materials, Department of Chemistry, K.L.E. Institute of Technology, Hubballi, 580 030, Karnataka, India
| | - Tejraj M Aminabhavi
- Department of Pharmaceutics, SETs' College of Pharmacy, Dharwad, 580 007, Karnataka, India.
| | - Jaesool Shim
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, 712-749, Republic of Korea.
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29
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J P, Kottam N, A R. Investigation of photocatalytic degradation of crystal violet and its correlation with bandgap in ZnO and ZnO/GO nanohybrid. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108460] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Rauwel P, Galeckas A, Rauwel E. Enhancing the UV Emission in ZnO-CNT Hybrid Nanostructures via the Surface Plasmon Resonance of Ag Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:452. [PMID: 33579049 PMCID: PMC7916755 DOI: 10.3390/nano11020452] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 02/04/2021] [Accepted: 02/06/2021] [Indexed: 12/16/2022]
Abstract
The crystal quality and surface states are two major factors that determine optical properties of ZnO nanoparticles (NPs) synthesized through nonaqueous sol-gel routes, and both are strongly dependent on the growth conditions. In this work, we investigate the influence of the different growth temperatures (240 and 300 °C) on the morphology, structural and crystal properties of ZnO NP. The effects of conjoining ZnO NP with carbon nanotubes (CNT) and the role of surface states in such a hybrid nanostructure are studied by optical emission and absorption spectroscopy. We demonstrate that depending on the synthesis conditions, activation or passivation of certain surface states may occur. Next, silver nanoparticles are incorporated into ZnO-CNT nanostructures to explore the plasmon-exciton coupling effect. The observed enhanced excitonic and suppressed defect-related emissions along with blue-shifted optical band gap suggest an intricate interaction of Burstein-Moss, surface plasmon resonance and surface band-bending effects behind the optical phenomena in hybrid ZnO-CNT-Ag nanocomposites.
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Affiliation(s)
- Protima Rauwel
- Institute of Technology, Estonian University of Life Sciences, 51014 Tartu, Estonia;
| | - Augustinas Galeckas
- Department of Physics, University of Oslo, P.O. Box 1048 Blindern, 0316 Oslo, Norway;
| | - Erwan Rauwel
- Institute of Technology, Estonian University of Life Sciences, 51014 Tartu, Estonia;
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Sengunthar P, Patel S, Thankachen N, Joshi US. Core–shell hybrid structured rGO decorated ZnO nanorods synthesized via a facile chemical route with photosensitive properties. NEW J CHEM 2021. [DOI: 10.1039/d1nj04382j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two-dimensional graphene-based nanocomposites have gained much attention due to their promising applications in electronic and optoelectronic devices.
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Affiliation(s)
- Poornima Sengunthar
- Department of Physics, School of Sciences, Gujarat University, Ahmedabad-380009, India
| | - Shivangi Patel
- Department of Physics, School of Sciences, Gujarat University, Ahmedabad-380009, India
| | - Nisha Thankachen
- Department of Physics, School of Sciences, Gujarat University, Ahmedabad-380009, India
| | - U. S. Joshi
- Department of Physics, School of Sciences, Gujarat University, Ahmedabad-380009, India
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Araujo FP, Trigueiro P, Honório LMC, Oliveira DM, Almeida LC, Garcia RP, Lobo AO, Cantanhêde W, Silva-Filho EC, Osajima JA. Eco-friendly synthesis and photocatalytic application of flowers-like ZnO structures using Arabic and Karaya Gums. Int J Biol Macromol 2020; 165:2813-2822. [PMID: 33736284 DOI: 10.1016/j.ijbiomac.2020.10.132] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 10/09/2020] [Accepted: 10/15/2020] [Indexed: 12/01/2022]
Abstract
Flowers-like ZnO structures were synthesized using Arabic Gum (AGZnO) or Karaya Gum (KGZnO). The AGZnO and KGZnO were characterized by X-ray diffractometry, Fourier Transformed Infrared, Scanning Electron Microscopy, Photoluminescence, nitrogen adsorption/desorption and diffuse reflectance techniques. The materials were tested in the discoloration of Methylene Blue (MB) dye under visible light and scavenger studies were also performed. The toxicity of the MB irradiated was investigated in bioassays with Artemia salina. The structural characterization demonstrated the formation of hexagonal ZnO. All samples presented flower-like morphology with presence of mesopores identified by BET method. The optical properties indicated band gap of 2.99 (AGZnO) and 2.76 eV (KGZnO), and emission in violet, blue and green emissions also were observed. The KGZnO demonstrated better photocatalytic performance than the AGZnO, and scavenger studies indicated that OH radicals are the main species involved in the degradation of the pollutant model. The photodiscoloration of MB solution did not demonstrate toxicity. Therefore, KGZnO is a promising material for photocatalysis application.
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Affiliation(s)
- Francisca P Araujo
- Federal University of Piauí, Interdisciplinary Laboratory Advanced Materials (Limav), Teresina, PI, Brazil
| | - Pollyana Trigueiro
- Federal University of Piauí, Interdisciplinary Laboratory Advanced Materials (Limav), Teresina, PI, Brazil
| | - Luzia M C Honório
- Federal University of Piauí, Interdisciplinary Laboratory Advanced Materials (Limav), Teresina, PI, Brazil
| | - Dyego M Oliveira
- Federal University of Pernambuco, Postgraduate Program in Materials Science and Engineering, Recife, PE, Brazil
| | - Luciano C Almeida
- Federal University of Pernambuco, Chemical Engineering Department, Recife, PE, Brazil
| | - Ramón Peña Garcia
- Federal University of Piauí, Interdisciplinary Laboratory Advanced Materials (Limav), Teresina, PI, Brazil
| | - Anderson Oliveira Lobo
- Federal University of Piauí, Interdisciplinary Laboratory Advanced Materials (Limav), Teresina, PI, Brazil
| | - Welter Cantanhêde
- Federal University of Piauí, Chemistry Department, Teresina, PI, Brazil
| | - Edson C Silva-Filho
- Federal University of Piauí, Interdisciplinary Laboratory Advanced Materials (Limav), Teresina, PI, Brazil
| | - Josy A Osajima
- Federal University of Piauí, Interdisciplinary Laboratory Advanced Materials (Limav), Teresina, PI, Brazil.
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Raza A, Qumar U, Hassan J, Ikram M, Ul-Hamid A, Haider J, Imran M, Ali S. A comparative study of dirac 2D materials, TMDCs and 2D insulators with regard to their structures and photocatalytic/sonophotocatalytic behavior. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01475-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Murali A, Sarswat PK, Perez JPL, Free ML. Synergetic effect of surface plasmon resonance and schottky junction in Ag-AgX-ZnO-rGO (X= Cl & Br) nanocomposite for enhanced visible-light driven photocatalysis. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124684] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ikram M, Raza A, Imran M, Ul-Hamid A, Shahbaz A, Ali S. Hydrothermal Synthesis of Silver Decorated Reduced Graphene Oxide (rGO) Nanoflakes with Effective Photocatalytic Activity for Wastewater Treatment. NANOSCALE RESEARCH LETTERS 2020; 15:95. [PMID: 32346803 PMCID: PMC7188753 DOI: 10.1186/s11671-020-03323-y] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 04/13/2020] [Indexed: 05/21/2023]
Abstract
Graphene oxide (GO) was obtained through modified hummers method, and reduced graphene oxide (rGO) was acquired by employing heat treatment. Various concentrations (2.5, 5, 7.5, and 10 wt. %) of silver (Ag) were incorporated in GO nanosheets by adopting hydrothermal approach. Synthesized Ag decorated rGO photocatalyst Ag/rGO was characterized using X-ray diffraction (XRD) to determine phase purity and crystal structure. XRD patterns showed the formation of GO to Ag/rGO. Molecular vibration and functional groups were determined through Fourier Transform Infrared spectroscopy (FTIR). Optical properties and a decrease in bandgap with insertion of Ag were confirmed with UV-Visible (Uv-Vis) spectrophotometer and photoluminescence (PL). Electronic properties and disorders in carbon structures were investigated through Raman spectroscopy that revealed the existence of characteristic bands (D and G). Surface morphology of prepared samples was examined with field emission scanning electron microscope (FESEM). Homogeneous distribution, size, and spherical shape of Ag NPs over rGO sheets were further confirmed with the help of high-resolution transmission electron microscope (HR-TEM). Dye degradation of doped and undoped samples was examined through Uv-Vis spectra. Experimental results indicated that photocatalytic activity of Ag@rGO enhanced with increased doping ratio owing to diminished electron-hole pair recombination. Therefore, it is suggested that Ag@rGO can be used as a beneficial and superior photocatalyst to clean environment and wastewater.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University Lahore, Lahore, Punjab 54000 Pakistan
| | - Ali Raza
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - Muhammad Imran
- State key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing Engineering Center for Hierarchical Catalysts, Beijing University of Chemical Technology, Beijing, 100029 China
| | - Anwar Ul-Hamid
- Center for Engineering Research, Research Institute, King Fahd University of Petroleum & Minerals, Dhahran, 31261 Saudi Arabia
| | - Atif Shahbaz
- Department of Physics, Government College University Lahore, Lahore, Punjab 54000 Pakistan
| | - Salamat Ali
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
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Trang TNQ, Phan TB, Nam ND, Thu VTH. In Situ Charge Transfer at the Ag@ZnO Photoelectrochemical Interface toward the High Photocatalytic Performance of H 2 Evolution and RhB Degradation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12195-12206. [PMID: 32013392 DOI: 10.1021/acsami.9b15578] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Designing an efficient hybrid structure photocatalyst for photocatalytic decomposition and hydrogen (H2) evolution has been considered a great choice to develop renewable technologies for clean energy production and environmental remediation. Enhanced charge transfer (CT) based on the interaction between a noble metal and a semiconductor is a crucial factor influencing the movement of photogenerated electron-hole pairs. Herein, we focus on the recent advances related to plasmon-enhanced noble metals and the semiconductor nature to drive the photocatalytic H2 production and photodegradation of the organic dye rhodamine B (RhB) under UV and visible light irradiation. Specifically, the combination of concerted catalysis and green nanoengineering strategies to design ZnO-based composite photocatalysts and their decoration with metallic Ag have been realized by the radio frequency (RF) sputtering technique at room temperature. This simultaneity enhances the interface coupling between Ag and ZnO and reduces the energy threshold. The creation of charge transfer in the heterojunction and Schottky barrier changes the photoelectronic properties of the as-synthesized Al-doped ZnO (AZO); afterward, these effects promote the migration, transportation, and separation of photoinduced charge carriers and enhance the light-harvesting efficiency. As a result, the as-synthesized AZO-20 hybrid nanostructure exhibits a photocurrent density of 2.5 mA/cm2 vs Ag/AgCl, which is improved by almost 12 times compared with that of bare ZnO (0.2 mA/cm2). The hydrogen evolution rates of AZO-20 were ∼38 and ∼24 μmol/h under UV and visible light exposure, which are almost five- and tenfold higher than those of pristine ZnO, respectively. Additionally, the RhB degradation efficacies of the obtained AZO-20 were greater than almost 97 and 82% under UV and visible light illumination, respectively. The achieved apparent rate constant for the photocatalytic RhB decomposition was 0.014 min-1, indicating that it is 14-fold than that in pristine ZnO (0.001 min-1). Heterostructure AZO photocatalysts possess excellent practical stability in the water-splitting reaction and photocatalytic RhB decomposition, posing as promising candidates in practical works for pollution and energy challenges.
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Affiliation(s)
- Ton Nu Quynh Trang
- Faculty of Physics and Physics Engineering, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
| | - Thang Bach Phan
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
- Center for Innovative Materials and Architectures, Ho Chi Minh City 700000, Vietnam
| | - Nguyen Dang Nam
- Future Materials & Devices Laboratory, Institute of Fundamental and Applied Sciences, Duy Tan University (DTU), Ho Chi Minh City 700000, Vietnam
| | - Vu Thi Hanh Thu
- Faculty of Physics and Physics Engineering, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University, Ho Chi Minh City 700000, Vietnam
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Robkhob P, Ghosh S, Bellare J, Jamdade D, Tang IM, Thongmee S. Effect of silver doping on antidiabetic and antioxidant potential of ZnO nanorods. J Trace Elem Med Biol 2020; 58:126448. [PMID: 31901726 DOI: 10.1016/j.jtemb.2019.126448] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 11/29/2019] [Accepted: 12/17/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND Increasing resistance to available drugs and their associated side-effects have drawn wide attention towards designing alternative therapeutic strategies for control of hyperglycemia and oxidative stress. The roles of the sizes and shapes of the nanomaterials used in the treatment and management of Type 2 Diabetes Mellitus (T2DM) in preventing chronic hyperglycaemia and oxidative stress are investigated. We report specifically on the effects of doping silver (Ag) into the ZnO nanorods (ZnO:Ag NR's) as a rational drug designing strategy. METHODS Inhibition of porcine pancreatic α-amylase, murine pancreatic amylase, α-glucosidase, murine intestinal glucosidase and amyloglucosidase are checked for evaluation of antidiabetic potential. In addition, the radical scavenging activities of ZnO:Ag NR's against nitric oxide, DDPH and superoxide radicals are evaluated. RESULTS Quantitative radical scavenging and metabolic enzyme inhibition activities of ZnO:Ag NR's at a concentration of 100 μg/mL were found to depend on the amount of Ag doped in up to a threshold level (3-4 %). Circular dichroism analysis revealed that the interaction of the NR's with the enzymes altered their secondary conformation. This alteration is the underlying mechanism for the potent enzyme inhibition. CONCLUSIONS Enhanced inhibition of enzymes and scavenging of free radicals primarily responsible for reactive oxygen species (ROS) mediated damage, provide a strong scientific rationale for considering ZnO:Ag NR's as a candidate nanomedicine for controlling postprandial hyperglycaemia and the associated oxidative stress.
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Affiliation(s)
- Prissana Robkhob
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
| | - Sougata Ghosh
- Department of Microbiology, School of Science, RK University, Rajkot, Gujarat 360020, India
| | - Jayesh Bellare
- Department of Chemical Engineering, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
| | - Dhiraj Jamdade
- Department of Microbiology, Modern College of Arts, Science and Commerce, Ganeshkhind, Pune 411016, India
| | - I-Ming Tang
- Computional & Applied Science for Innovation Cluster (CLASSIC), Department of Mathematics, Faculty of Science, King Mongkut's University of Technology, Thonburi, Bangkok 10140, Thailand
| | - Sirikanjana Thongmee
- Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
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Hsueh YH, Hsieh CT, Chiu ST, Tsai PH, Liu CY, Ke WJ. Antibacterial Property of Composites of Reduced Graphene Oxide with Nano-Silver and Zinc Oxide Nanoparticles Synthesized Using a Microwave-Assisted Approach. Int J Mol Sci 2019; 20:E5394. [PMID: 31671904 PMCID: PMC6862684 DOI: 10.3390/ijms20215394] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/28/2019] [Accepted: 10/28/2019] [Indexed: 12/21/2022] Open
Abstract
Graphene oxide (GO) composites with various metal nanoparticles (NPs) are attracting increasing interest owing to their broad scope in biomedical applications. Here, microwave-assisted chemical reduction was used to deposit nano-silver and zinc oxide NPs (Ag and ZnO NPs) on the surface of reduced GO (rGO) at the following weight percentages: 5.34% Ag/rGO, 7.49% Ag/rGO, 6.85% ZnO/rGO, 16.45% ZnO/rGO, 3.47/34.91% Ag/ZnO/rGO, and 7.08/15.28% Ag/ZnO/rGO. These materials were tested for antibacterial activity, and 3.47/34.91% Ag/ZnO/rGO and 7.08/15.28% Ag/ZnO/rGO exhibited better antibacterial activity than the other tested materials against the gram-negative bacterium Escherichia coli K12. At 1000 ppm, both these Ag/ZnO/rGO composites had better killing properties against both E. coli K12 and the gram-positive bacterium Staphylococcus aureus SA113 than Ag/rGO and ZnO/rGO did. RedoxSensor flow cytometry showed that 3.47/34.91% Ag/ZnO/rGO and 7.08/15.28% Ag/ZnO/rGO decreased reductase activity and affected membrane integrity in the bacteria. At 100 ppm, these two composites affected membrane integrity more in E. coli, while 7.08/15.28% Ag/ZnO/rGO considerably decreased reductase activity in S. aureus. Thus, the 3.47/34.91% and 7.08%/15.28% Ag/ZnO/rGO nanocomposites can be applied not only as antibacterial agents but also in a variety of biomedical materials such as sensors, photothermal therapy, drug delivery, and catalysis, in the future.
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Affiliation(s)
- Yi-Huang Hsueh
- Department of Seafood Science, National Kaohsiung University of Science and Technology, Kaohsiung 81143, Taiwan.
| | - Chien-Te Hsieh
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan.
| | - Shu-Ting Chiu
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan 32003, Taiwan.
| | - Ping-Han Tsai
- Graduate School of Biotechnology and Bioengineering, Yuan Ze University, Taoyuan 32003, Taiwan.
| | - Chia-Ying Liu
- Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei City 220, Taiwan.
| | - Wan-Ju Ke
- Graduate Institute of Biomedical Sciences, and Research Center for Bacterial Pathogenesis, Chang Gung University, Taoyuan 33302, Taiwan.
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Preparation of ternary ZnO/Ag/cellulose and its enhanced photocatalytic degradation property on phenol and benzene in VOCs. OPEN CHEM 2019. [DOI: 10.1515/chem-2019-0088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThe ZnO/Ag/cellulose composite (ZAC) with excellent photocatalytic activity of degrading benzene and phenol in VOCs has been successfully synthesized. EDS, TEM, XPS and UV-vis analyses show that the ZAC is a ternary composite. It is composed of Ag, ZnO and cellulose, where the cellulose works as the substrate to anchor the other two components. The X-ray diffraction patterns find well-crystallized ZnO nanoparticles. Multiple PL peaks in the visible region measured for ZAC, imply rich defects on ZnO. It is observed that Ag nanoparticles are mainly attached on ZnO in the composite, which would raise the separation efficiency of photogenerated electrons and holes. Photocatalytic degradation shows that ZAC is able to decompose almost 100% phenol and 19% benzene in VOCs under UV light irradiation (6 W) which is almost no harm to human body. Due to the renewable cellulose, our ternary composite ZAC imparts low-cost, easily recycled and flexible merits, which might be applied in the indoor VOCs treatment.
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