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Elshahawy MF, Ahmed NA, Gad YH, Ali AEH. Efficient photocatalytic remediation of lerui acid brilliant blue dye using radiation- prepared carboxymethyl cellulose/acrylic acid hydrogel supported by ZnO@Ag. Int J Biol Macromol 2024; 262:129946. [PMID: 38340936 DOI: 10.1016/j.ijbiomac.2024.129946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/29/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
Organic dye pollution from textiles and other industries presents a substantial risk to people and aquatic life. The use of photocatalysis to decolorize water using the strength of UV light is one of the most important remediation techniques. In the present study, a novel nanocomposites hydrogel including carboxymethyl cellulose (CMC), acrylic acid (AAc), Zinc oxide (ZnO), and silver (Ag) nanoparticles was produced using an eco-friendly γ-irradiation technique for photocatalytic decolorization applications. ZnO and Ag nanoparticles were distributed in the CMC/AAc hydrogel matrix without significant aggregation. SEM, XRD, EDX, TEM, and FTIR analyses were used to assess the physicochemical characteristics of the nanocomposite samples. Carboxymethyl cellulose/acrylic acid/Zinc oxide doped silver (CMC/PAAc/ZnO@Ag) nanocomposite hydrogels were developed and utilized in the photocatalytic decolorization of the lerui acid brilliant blue dye (LABB) when exposed to ultraviolet (UV) radiation. UV- Vis spectrophotometry was utilized to analyze the optical properties of the produced nanostructure. Regarding the decolorization of the LABB, the impacts of operational variables were investigated. The optimum conditions for decolorization (93 %) were an initial concentration of 50 mg/L, pH = 4, catalyst dosage of 50 g/L, and exposure time of 90 min. The results illustrated that the LABB acidic dye from wastewater was remarkably decolored.
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Affiliation(s)
- Mai F Elshahawy
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Nehad A Ahmed
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Yasser H Gad
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt.
| | - Amr El-Hag Ali
- Radiation Research of Polymer Chemistry Department, National Center for Radiation Research and Technology, Egyptian Atomic Energy Authority, Cairo, Egypt
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2
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Mubeen K, Safeen K, Irshad A, Safeen A, Ghani T, Shah WH, Khan R, Ahmad KS, Casin R, Rashwan MA, Elansary HO, Shah A. ZnO/CuSe composite-mediated bandgap modulation for enhanced photocatalytic performance against methyl blue dye. Sci Rep 2023; 13:19580. [PMID: 37949952 PMCID: PMC10638292 DOI: 10.1038/s41598-023-46780-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Accepted: 11/04/2023] [Indexed: 11/12/2023] Open
Abstract
The removal of toxic dye pigments from the environment is of utmost importance since even trace amounts of these pollutants can lead to harmful impacts on ecosystems. Heterogeneous photocatalysis is a potential technique for eliminating microbiological, inorganic, and organic pollutants from wastewater. Here, we report the band gap alteration of ZnO by making its composites with CuSe to enhance photocatalytic activity. The purpose is to develop metal oxide nanocomposites (ZnO/CuSe) as an effective and efficient material for the photodegradation of methyl blue. The photocatalysts, ZnO nanorods, CuSe, and ZnO/CuSe nanocomposites of different weight ratios were synthesized by the simple and cost-effective technique of precipitation. UV-Vis spectra verified that the ZnO/CuSe photocatalyst improved absorption in the visible region. The optical bandgap of ZnO/CuSe nanocomposites reduced from 3.37 to 2.68 eV when CuSe concentration increased from 10 to 50%. ZnO/CuSe composites demonstrated better photocatalytic activity than ZnO when exposed to UV-visible light. The pure ZnO nanorods could absorb UV light and the nanocomposites could absorb visible light only; this was attributed to the transfer of excited high-energy electrons from ZnO to CuSe.
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Affiliation(s)
- Khalida Mubeen
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, 45650, Pakistan
- National Institute of Lasers and Optoelectronics College, Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, 45650, Pakistan
| | - Kashif Safeen
- Department of Physics, Abdul Wali Khan University, Mardan, 23200, Pakistan
| | - Afshan Irshad
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, 45650, Pakistan
- Center for Mathematical Sciences, PIEAS, Nilore, Islamabad, 45650, Pakistan
| | - Akif Safeen
- Department of Physics, University of Poonch Rawalakot, Rawalakot, AJK, 12350, Pakistan.
| | - Tayyaba Ghani
- Department of Metallurgy and Material Engineering, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, Islamabad, 45650, Pakistan
| | - Wiqar H Shah
- Department of Physics, Faculty of Basic and Applied Sciences, International Islamic University, H-10, Islamabad, Pakistan
| | - Rajwali Khan
- Department of Physics, University of Lakki Marwat, Lakki Marwat, KP, 28420, Pakistan
| | | | - Ryan Casin
- School of Public Health, University of California, Berkeley, 2121 Berkeley Way, Berkeley, CA, 94704, USA
| | - Mohamed A Rashwan
- Department of Agricultural Engineering, College of Food and Agriculture Sciences, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Hosam O Elansary
- Plant Production Department, College of Food and Agriculture Sciences, King Saud University, 11451, Riyadh, Saudi Arabia.
| | - Attaullah Shah
- National Institute of Lasers and Optoelectronics College, Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, 45650, Pakistan.
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Edwin Malefane M, John Mafa P, Thokozani Innocent Nkambule T, Elizabeth Managa M, Tawanda Kuvarega A. Modulation of Z-scheme photocatalysts for pharmaceuticals remediation and pathogen inactivation: Design devotion, concept examination, and developments. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2023; 452:138894. [PMID: 36060035 PMCID: PMC9422400 DOI: 10.1016/j.cej.2022.138894] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/08/2022] [Accepted: 08/25/2022] [Indexed: 06/13/2023]
Abstract
The recent outbreak of Covid-19 guarantees overconsumption of different drugs as a necessity to reduce the symptoms caused by this pandemic. This triggers the proliferation of pharmaceuticals into drinking water systems. Is there any hope for access to safe drinking water? Photocatalytic degradation using artificial Z-scheme photocatalysts that has been employed for over a decade conveys a prospect for sustainable clean water supply. It is compelling to comprehensively summarise the state-of-the-art effects of Z-scheme photocatalytic systems towards the removal of pharmaceuticals in water. The principle of Z-scheme and the techniques used to validate the Z-scheme interfacial charge transfer are explored in detail. The application of the Z-scheme photocatalysts towards the degradation of antibiotics, NSAIDs, and bacterial/viral inactivation is deliberated. Conclusions and stimulating standpoints on the challenges of this emergent research direction are presented. The insights and up-to-date information will prompt the up-scaling of Z- scheme photocatalytic systems for commercialization.
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Affiliation(s)
- Mope Edwin Malefane
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida 1709, Johannesburg, South Africa
| | - Potlako John Mafa
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida 1709, Johannesburg, South Africa
| | - Thabo Thokozani Innocent Nkambule
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida 1709, Johannesburg, South Africa
| | - Muthumuni Elizabeth Managa
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida 1709, Johannesburg, South Africa
| | - Alex Tawanda Kuvarega
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Florida 1709, Johannesburg, South Africa
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Mpeta LS, Nyokong T. Phthalocyanine based fabricated exfoliated graphite photoanode for electrodegradation of 4-acetamidophenol under visible light irradiation. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Zhang K, Song H, An Z, Zhang J, Zhu Y, Chai Z, Shu X, He J. The mesoscale mechanism of P-dopant defects and interface synergy for phenols degradation. Chem Asian J 2022; 17:e202200476. [PMID: 35750634 DOI: 10.1002/asia.202200476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/12/2022] [Indexed: 11/10/2022]
Abstract
The semiconductor based photocatalysis has become a hot spot of current research, and the key challenges are the construction of strong functional heterojunction photocatalysts, and insights on the working mechanism involved. In this work, we constructed a NiFe- LDHs/P-TCN heterojunction with P-dopant defects and interface synergy, and elucidated its mesoscale mechanism among different constituent interfaces. The interface photoelectron transfer was detected by PAS, EPR and other methods, and the enhancing mechanism of the defect sites for interface electron transfer and photocatalytic activity was proposed. The interfacial electrons, photoelectric properties and photocatalytic activity are found to be positively correlated. The result is conducive for a better understanding on working mechanism of heterogeneous photocatalysts, which opened up a broader research space for the rational design and construction of functional interfaces.
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Affiliation(s)
- Kaiqi Zhang
- Beijing University of Chemical Technology, Chemical Institute, CHINA
| | - Hongyan Song
- Beijing University of Chemical Technology, CHINA
| | - Zhe An
- Beijing University of Chemical Technology, Chemical Institute, CHINA
| | - Jian Zhang
- Beijing University of Chemical Technology, Chemical Institute, CHINA
| | - Yanru Zhu
- Beijing University of Chemical Technology, Chemical Institute, CHINA
| | - Zhigang Chai
- Beijing University of Chemical Technology, Chemical Institute, CHINA
| | - Xin Shu
- Beijing University of Chemical Technology, Chemical Institute, CHINA
| | - Jing He
- Beijing University of Chemical Technology, Chemical Institute, CHINA
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Mafa PJ, Malefane ME, Idris AO, Liu D, Gui J, Mamba BB, Kuvarega AT. Multi-elemental doped g-C3N4 with enhanced visible light photocatalytic Activity: Insight into naproxen Degradation, Kinetics, effect of Electrolytes, and mechanism. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120089] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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7
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Abkar E, Hassanpour M, Amiri O, Ghanbari M, Salavati-Niasari M. Photocatalytic and antibacterial activities of Tl–Hg–I nanocomposites: sonochemical synthesis and characterization. RSC Adv 2021; 11:22238-22249. [PMID: 35480791 PMCID: PMC9034220 DOI: 10.1039/d1ra03666a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 06/16/2021] [Indexed: 12/18/2022] Open
Abstract
Efforts to find new and practical solutions to improve water quality and treatment of industrial effluents are ongoing. In this study, Tl4HgI6/HgI2 nanocomposites were synthesized by a rapid ultrasonic method to investigate their photocatalytic and antibacterial activity. Various synthesis conditions such as changes in the ratio of precursors, use of surfactants, and changes in the power and time of sonication to achieve particles with optimal size and morphology were performed. X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis confirmed the purity and formation of the nanocomposite. Optimal nanoparticles in terms of size and morphology were selected by examining the images obtained from scanning electron microscopy (SEM) analysis. The nanocomposites obtained in the presence of PVP (polyvinylpyrrolidone) as a surfactant (sample no. 8) were selected as the optimal sample. Transmission electron microscopy (TEM), differential reflectance spectroscopy (DRS), Raman, N2 adsorption/desorption analyzes were performed for the optimal sample to evaluate the properties of nanocomposites. The band-gap for Tl4HgI6/HgI2 nanocomposites was calculated to be about 2.3 eV for HgI2 and 3.1 eV for Tl4HgI6. The optimal sample was used to evaluate the photocatalytic activity for decolorizing an aqueous solution of six different organic dyes. Finally, for rhodamine B, the decolorization was about 80%. Also, Tl4HgI6/HgI2 nanocomposite showed a significant inhibition zone in the antibacterial test. The maximum inhibition diameter of 50 mm was obtained against Streptococcus pyogenes. The results showed that Tl4HgI6/HgI2 nanocomposites have good potential for many industrial applications. In this work, Tl4HgI6/HgI2 nanocomposites were synthesized by a rapid ultrasonic method. The photocatalytic properties of the nanocomposites were evaluated for the first time. Photocatalytic properties were performed for six industrial dyes.![]()
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Affiliation(s)
- Elham Abkar
- Institute of Nano Science and Nano Technology
- University of Kashan
- Kashan
- Iran
| | | | - Omid Amiri
- Faculty of Chemistry
- Razi University
- Kermanshah
- Iran
- Department of Chemistry
| | - Mojgan Ghanbari
- Institute of Nano Science and Nano Technology
- University of Kashan
- Kashan
- Iran
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Malefane ME. Co 3O 4/Bi 4O 5I 2/Bi 5O 7I C-Scheme Heterojunction for Degradation of Organic Pollutants by Light-Emitting Diode Irradiation. ACS OMEGA 2020; 5:26829-26844. [PMID: 33111009 PMCID: PMC7581276 DOI: 10.1021/acsomega.0c03881] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 10/02/2020] [Indexed: 05/29/2023]
Abstract
Remediation of organic pollutant matrixes from wastewater by photodegradation using different heterojunctions is extensively studied to improve performance for potential application. Brilliant black (BB) and p-nitrophenol (PNP) have been detected in the environment and implicated as directly or indirectly carcinogenic to human health. This work analyzes their elimination from aqueous solutions under visible-light irradiation with composites of cobalt(II, III) oxide and bismuth oxyiodides (Co3O4/Bi4O5I2/Bi5O7I). The synthesized nanomaterial properties were investigated using various techniques such as BET, SEM/EDS, TEM, XRD, FTIR, PL, and UV-vis. All the nanocomposites absorbed in the visible range of the solar spectrum with band gaps between 1.68 and 2.79 eV, and the specific surface area of the CB2 composite increased by 35.8% from that of Bi4O5I2/Bi5O7I. There was an observed massive reduction in the rate of electron and hole recombination, and the band gaps of the composites decreased. The mineralization of PNP and BB was followed by determination of the total organic carbon with reductions of 93.6 and 83.7%, respectively. The main active species were the hydroxyl radicals, while the superoxide anion radical and generated holes were minor as confirmed by radical trapping experiments. The optimum pHs for degradation of PNP and BB were 9.6 and 5.3, respectively. The enhanced performance of the catalyst was due to C-scheme heterojunction formation that reduced the electron and hole recombination rate and was attributed to strong adsorption of the pollutants on the photocatalyst active surface. The nanocomposite is apposite for solar energy-driven remediation of organic pollutants from environmental aqueous samples.
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Photocatalytic Poly(vinylidene fluoride) membrane of Ag3PO4/GO/APTES for water treatment. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124779] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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10
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Aguilar CAH, Narayanan J, López JAB, Flores-Alamo M, Contreras EFV, Gastélum KAL, Alonzo FR, Cabrera CBP, Cuevas AJS. Enhanced photocatalytic degradation of 2-thiobenzimidazole by the tris(8-quinolinolato)cobalt( iii) complex through peroxide adduct formation: theoretical and experimental investigations. NEW J CHEM 2020. [DOI: 10.1039/c9nj04027g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
HOMO–LUMO influenced photocatalytic degradation of 2-thiobenzimidazole through a thermodynamically favored route has been achieved by the cobalt(iii) Schiff base complex.
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Affiliation(s)
- Carlos Alberto Huerta Aguilar
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
| | - Jayanthi Narayanan
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
| | | | - Marcos Flores-Alamo
- Facultad de Química
- Universidad Nacional Autónoma de México
- Ciudad Universitaria
- México D. F
- Mexico
| | | | | | - Fernando Rocha Alonzo
- Departamento de Investigación en Polímeros y Materiales
- Universidad de Sonora
- Hermosillo
- Mexico
| | - Cristian Brayan Palacios Cabrera
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
| | - Alan Javier Santiago Cuevas
- División de Ingeniería en Nanotecnología
- Universidad Politécnica del Valle de México
- Av. Mexiquense s/n esquina Av. Universidad Politécnica
- Tultitlan
- Mexico
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