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Haspulat Taymaz B, Demir M, Kamış H, Orhan H, Aydoğan Z, Akıllı A. Facile and green synthesis of ZnO nanoparticles for effective photocatalytic degradation of organic dyes and real textile wastewater. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2022:1-12. [PMID: 36437748 DOI: 10.1080/15226514.2022.2150142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Remediation of organic dyes from wastewater in textile industries is a big challenge to decreasing water pollution. This study was aimed at the preparation of ZnO nanoparticles (NPs) and their application as a photocatalyst for the degradation of methylene blue (MB), sunfix red (SR) and real textile wastewater (RTW) under both UV and visible irradiations. The ZnO NPs were synthesized with a green Thymus vulgaris leaf extract-supported approach following the calcination process. 50 mg L-1 MB and 50 mg L-1 SR dyes were completely photodegrade under UV irradiation after only 20 and 45 minutes, respectively, in the presence of 1.0 mg/mL ZnO NPs. When they are exposed to visible light, the degradation efficiency reached 91 and 75% within 60 and 120 min, respectively. Photocatalytic measurements of RTW depict that 95% (within 60 min under UV illumination) and 79% (within 90 min under visible illumination) were degraded, respectively. The enhanced photodegradation can be attributed to the narrowing of the bandgap of the ZnO NPs, high crystallinity and nearly hexagonal morphology with an average size of 20-30 nm. The present results show that ZnO NPs could potentially be applied for high-efficiency degradation of organic dyes and RTW under both UV and visible light irradiation.
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Affiliation(s)
| | - Muslum Demir
- Department of Chemical Engineering, Osmaniye Korkut Ata University, Osmaniye, Türkiye
| | - Handan Kamış
- Department of Chemical Engineering, Konya Technical University, Konya, Türkiye
| | - Hüseyin Orhan
- Department of Chemical Engineering, Konya Technical University, Konya, Türkiye
| | - Zuhal Aydoğan
- Department of Chemical Engineering, Konya Technical University, Konya, Türkiye
| | - Aleyna Akıllı
- Department of Chemical Engineering, Konya Technical University, Konya, Türkiye
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Riaz S, Park SJ. An overview of TiO2-based photocatalytic membrane reactors for water and wastewater treatments. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2019.12.021] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Islam A, Hwa Teo S, Awual MR, Taufiq-Yap YH. Ultrathin Assembles of Porous Array for Enhanced H 2 Evolution. Sci Rep 2020; 10:2324. [PMID: 32047187 PMCID: PMC7012925 DOI: 10.1038/s41598-020-59325-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Accepted: 01/27/2020] [Indexed: 11/20/2022] Open
Abstract
Since the complexity of photocatalyst synthesis process and high cost of noble cocatalyst leftovers a major hurdle to producing hydrogen (H2) from water, a noble metal-free Ni-Si/MgO photocatalyst was realized for the first time to generate H2 effectively under illumination with visible light. The catalyst was produced by means of simple one-pot solid reaction using self-designed metal reactor. The physiochemical properties of photocatalyst were identified by XRD, FESEM, HRTEM, EDX, UV-visible, XPS, GC and PL. The photocatalytic activities of Ni-Si/MgO photocatalyst at different nickel concentrations were evaluated without adjusting pH, applied voltage, sacrificial agent or electron donor. The ultrathin-nanosheet with hierarchically porous structure of catalyst was found to exhibit higher photocatalytic H2 production than hexagonal nanorods structured catalyst, which suggests that the randomly branched nanosheets are more active surface to increase the light-harvesting efficiency due to its short electron diffusion path. The catalyst exhibited remarkable performance reaching up to 714 µmolh−1 which is higher among the predominant semiconductor catalyst. The results demonstrated that the photocatalytic reaction irradiated under visible light illumination through the production of hydrogen and hydroxyl radicals on metals. The outcome indicates an important step forward one-pot facile approach to prepare noble ultrathin photocatalyst for hydrogen production from water.
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Affiliation(s)
- Aminul Islam
- Department of Petroleum and Mining Engineering, Jashore University of Science and Technology, Jashore, 7408, Bangladesh.
| | - Siow Hwa Teo
- Chancellery Office, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia.,Catalysis Science and Technology Research Centre, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia
| | - Md Rabiul Awual
- Materials Science and Research Center, Japan Atomic Energy Agency (JAEA), Hyogo, 679-5148, Japan
| | - Yun Hin Taufiq-Yap
- Chancellery Office, Universiti Malaysia Sabah, 88400, Kota Kinabalu, Sabah, Malaysia. .,Catalysis Science and Technology Research Centre, Faculty of Science, Universiti Putra Malaysia, 43400 UPM, Serdang, Selangor, Malaysia.
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Alamelu K, Jaffar Ali BM. Sunlight driven photocatalytic performance of a Pt nanoparticle decorated sulfonated graphene–TiO2 nanocomposite. NEW J CHEM 2020. [DOI: 10.1039/d0nj00394h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An efficient Pt nanoparticle decorated sulfonated graphene–TiO2 (SGTPt) ternary nanocomposite was prepared through a facile hydrothermal route followed by the polyol process.
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Affiliation(s)
- K. Alamelu
- Bioenergy and Biophotonics Laboratory
- Department of Green Energy Technology
- Pondicherry University
- Puducherry-605014
- India
| | - B. M. Jaffar Ali
- Bioenergy and Biophotonics Laboratory
- Department of Green Energy Technology
- Pondicherry University
- Puducherry-605014
- India
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Wang R, Shi K, Huang D, Zhang J, An S. Synthesis and degradation kinetics of TiO 2/GO composites with highly efficient activity for adsorption and photocatalytic degradation of MB. Sci Rep 2019; 9:18744. [PMID: 31822693 PMCID: PMC6904494 DOI: 10.1038/s41598-019-54320-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/04/2019] [Indexed: 11/09/2022] Open
Abstract
Poriferous TiO2/GO (denoted as TGO-x%) photocatalysts with ultrathin grapheme oxide (GO) layer were prepared by a hydrothermal method, the adsorption and photocatalytic degradation and its kinetics about Methylene blue(MB) were studied systematically. All the TGO-x% showed improved adsorption and photodegradation performance. TGO-25% had excellent adsorptivity while TGO-20% exhibit the highest visible light photocatalytic degradation activity. The adsorption capacity for TGO-25% was 20.25 mg/gcatalyst along with the k1 was about 0.03393 min·gcatalyst/mg, this enhancement was mainly owing to the strong adsorption capacity of GO and the stacking structure of sheets and nanoparticles. GO sheets prevented the agglomeration of TiO2 particles and TiO2 nanoparticles also prevented the agglomeration of GO sheets, which could provides greater surface area. Besides, the remarkably superior photodegradation activity of TiO2/GO composites is mainly attribute to the strong absorption of visible light and the effective charge separation revealed by the photoluminescence, the total removal rate of MB is 97.5% after 35 min adsorption and 140 min degradation, which is 3.5 times higher than that of TiO2.
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Affiliation(s)
- Ruifen Wang
- Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, PR China.
| | - Kaixuan Shi
- Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, PR China
| | - Dong Huang
- Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, PR China
| | - Jing Zhang
- Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, PR China
| | - Shengli An
- Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, 014010, PR China
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Zhu M, Cai Y, Liu S, Fang M, Tan X, Liu X, Kong M, Xu W, Mei H, Hayat T. K 2Ti 6O 13 hybridized graphene oxide: Effective enhancement in photodegradation of RhB and photoreduction of U(VI). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 248:448-455. [PMID: 30826607 DOI: 10.1016/j.envpol.2019.02.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/07/2019] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
The environmental pollutions by organic pollutants and radionuclides have aroused great concern. Developing highly efficient elimination methods becomes an imperious demand. In this study, a nanocomposite of K2Ti6O13 (KTO) nanobelts hybridized graphene oxide (GO) nanosheets (GO/KTO) was used to photodegrade RhB (dye) and photoreduce U(VI) (radionuclide), which was synthesized by a facile hydrothermal method. The adsorption capacity and the slope (k) of the curve -ln(C/C) versus time in photodegradation of RhB by GO/KTO were higher than that by GO and KTO. In the presence of different free radical scavengers, superoxide radical (·O2-) was found to play the most significant role in the reaction. The XPS experiment indicates U(VI) was successfully photoreduced to less toxic U(IV). The pH dependent photocatalytic experiments on RhB and U(VI) both showed the best performance at neutral pH value (from pH 6 to pH 8). To investigate the reason for the enhanced photocatalysis of GO/KTO, the morphology/microstructure, optical and photo-electrochemical properties were examined. The enhanced abilities of separation of photo electrons and holes and the adsorption of GO/KTO were ascribed to the structure of KTO nanobelts laying on the surface of GO nanosheets, which may maximize the contacting area between KTO and GO, and thus greatly reduce the surface related oxygen defects to enhance the electron interface transfer between KTO and GO and decrease the recombination efficiency of electrons and holes. These results showed the GO/KTO has great application potential in environmental treatment of organic pollutants and high valent heavy/radionuclide ions at neutral condition.
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Affiliation(s)
- Mingyu Zhu
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Yawen Cai
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Shuya Liu
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Ming Fang
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China.
| | - Xiaoli Tan
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Xiaoyan Liu
- MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, PR China
| | - Mingguang Kong
- Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Wei Xu
- Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Huiyang Mei
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, PR China
| | - Tasawar Hayat
- NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
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