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Gopal V, Palanisamy G, Lee J, Abu-Yousef IA, Majdalawieh AF, Mahasneh A, Prabu KM, Kanan S. Fabrication of SrTiO 3 anchored rGO/g-C 3N 4 photocatalyst for the removal of mixed dye from wastewater: dual photocatalytic mechanism. Sci Rep 2024; 14:16259. [PMID: 39009639 PMCID: PMC11251063 DOI: 10.1038/s41598-024-66844-x] [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: 04/18/2024] [Accepted: 07/04/2024] [Indexed: 07/17/2024] Open
Abstract
A metal-free combination of rGO/g-C3N4-coupled SrTiO3 (SRN) ternary nanocomposite prepared via a wet impregnation method for UV-Vis light photocatalytic applications. Various physicochemical properties of the samples were investigated by several spectroscopic techniques including X-ray diffraction (XRD), FT-IR, Raman, field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FE-SEM-EDX), high-resolution transmission electron microscopy (HR-TEM), UV-Vis, photoluminescence (PL), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) surface area analysis. The data suggest agglomerated SRT nanoparticles are dispersed and distributed throughout the surface of the rGO sheets and GCN nanostructures. The photocatalytic performance of the SRN towards combined mixed dye and its degradation activities were evaluated towards the most common industrial effluents, Rhodamine B (RhB) and Methylene blue (MB), under UV-Vis light illumination. The results revealed that the degradation efficiency of the SRN photocatalyst shows excellent performance compared with that of the binary composition and the pure SrTiO3 (SRT) sample. The reaction rate constant for RhB was estimated to be 0.0039 min-1 and for MB to be 0.0316 min-1, which are 3.26 (RhB) and 4.21 (MB) times faster than the pure SRT sample. The enhanced degradation efficiency was attained not only by interfacial formation but also by the speedy transportation of electrons across the heterojunction. After 5 runs of the photocatalytic recylic process, the SRN photocatalyst exhibited ultimate stability without structural changes, and no noticeable degradation was observed. The outcomes of the ternary SRN nanocomposite manifest a dual photocatalytic scheme, the photocatalytic enrichment could be caused by the Z-scheme charge transfer process between GCN, SRT, and rGO nanocomposite, which helps effectual charge separation and keeps a high redox potential. From the results, SRN sample provides insight into the integration of an effective and potential photocatalyst for wastewater treatment toward real-time environmental remediation applications.
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Affiliation(s)
- Venkatesh Gopal
- Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates.
| | - Govindasamy Palanisamy
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea.
| | - Jintae Lee
- School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, 38541, Republic of Korea
| | - Imad A Abu-Yousef
- Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Amin F Majdalawieh
- Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Amjad Mahasneh
- Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates
| | - Kattupatti M Prabu
- PG and Research Department of Physics, Sri Vidya Mandir Arts and Science College, Katteri, Uthangarai, Tamilnadu, 636 902, India
| | - Sofian Kanan
- Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates.
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Hazem Najem A, Mahmood Khudhur I, M. A. Ali G. Inhibitory effect of Titanium dioxide (Tio2) nanoparticles and their synergistic activity with antibiotics in some types of bacteria. BIONATURA 2023. [DOI: 10.21931/rb/2023.08.01.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023] Open
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) were studied as antibacterial agents at different concentrations against clinical and environmental bacterial isolates without UV or photocatalytic activation. Five TiO2 NPs concentrations (20µg/ml,50µg/ml, 100µg/ml,500µg/ml and 1000µg/ml) were studied against 15 bacterial species:10 clinical isolates and 5 environmental isolates) compared with antibiotics Amikacin(AK)and Levloxacin(LEV).Only500µg/ml concentration of TiO2 NPs was active against 7 bacterial isolates (3 clinical and 4 environmental), and 1000µg/ml concentration of TiO2 NPs was effective against 9 isolates (6 clinical and 3 environmental ). These concentrations were mixed with the antibiotics Levloxacin LEV and Amikacin AK to investigate the possibility of synergistic activity against studied bacteria. Bacterial isolate's response or sensitivity to the antibiotic and TiO2 NPs mixture was varied; AK plus 500µg/ml TiO2 NPs concentration showed increased inhibitory activity against 7 isolates (3 clinical, 4 environmental) and 1000µg/ml TiO2 NPs mixed with AK showed increased inhibition activity against one environmental bacterial isolates, where Ak mixed with 500 and Ak plus 1000 µg/ml showed the same effect as the antibiotic alone or less.LEV antibiotic shows no difference in the effect on all 9 bacteria (7 clinical and 2 environmental), while LEV mixed with 500 µg/ml have increased inhibition zones on 4 bacteria (2 clinical, 2 environmental) , and LEV mixed with 1000µg/ml have higher effect than the antibiotic alone on three isolates (2 clinical,1 environmental).
Keywords: antibiotic; titanium nanoparticles dioxide; antibacterial.
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Affiliation(s)
- Ashwaq Hazem Najem
- Department of Biology, College of Science, Mosul University, Mosul, Iraq
| | | | - Ghaydaa M. A. Ali
- Department of Biology, College of Science, Mosul University, Mosul, Iraq
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Song J, Liu Z, Boñgol JP, Zhang Z, Yeung KL. An atmospheric water harvester with fast and energy‐saving water removal and recovery. BIOSURFACE AND BIOTRIBOLOGY 2023. [DOI: 10.1049/bsb2.12056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Affiliation(s)
- Jiayu Song
- Department of Chemical and Biological Engineering the Hong Kong University of Science and Technology Kowloon Hong Kong
| | - Zhang Liu
- Division of Environment and Sustainability the Hong Kong University of Science and Technology Kowloon Hong Kong
| | - Jhoanne Pedres Boñgol
- Department of Chemical and Biological Engineering the Hong Kong University of Science and Technology Kowloon Hong Kong
| | - Zhaoxin Zhang
- Division of Emerging Interdisciplinary Areas The Hong Kong University of Science and Technology Kowloon Hong Kong
| | - King Lun Yeung
- Department of Chemical and Biological Engineering the Hong Kong University of Science and Technology Kowloon Hong Kong
- Division of Environment and Sustainability the Hong Kong University of Science and Technology Kowloon Hong Kong
- HKUST Shenzhen‐Hong Kong Collaborative Innovation Research Institute Shenzhen Guangdong China
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Hussain FS, Abro NQ, Ahmed N, Memon SQ, Memon N. Nano-antivirals: A comprehensive review. FRONTIERS IN NANOTECHNOLOGY 2022. [DOI: 10.3389/fnano.2022.1064615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Nanoparticles can be used as inhibitory agents against various microorganisms, including bacteria, algae, archaea, fungi, and a huge class of viruses. The mechanism of action includes inhibiting the function of the cell membrane/stopping the synthesis of the cell membrane, disturbing the transduction of energy, producing toxic reactive oxygen species (ROS), and inhibiting or reducing RNA and DNA production. Various nanomaterials, including different metallic, silicon, and carbon-based nanomaterials and nanoarchitectures, have been successfully used against different viruses. Recent research strongly agrees that these nanoarchitecture-based virucidal materials (nano-antivirals) have shown activity in the solid state. Therefore, they are very useful in the development of several products, such as fabric and high-touch surfaces. This review thoroughly and critically identifies recently developed nano-antivirals and their products, nano-antiviral deposition methods on various substrates, and possible mechanisms of action. By considering the commercial viability of nano-antivirals, recommendations are made to develop scalable and sustainable nano-antiviral products with contact-killing properties.
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Photooxidation and Virus Inactivation using TiO2(P25)–SiO2 Coated PET Film. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS 2022. [DOI: 10.9767/bcrec.17.3.14180.508-519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This study chemically modified PET film surface with P25 using silicate as a binder. Different P25–binder ratios were optimized for the catalyst performance. The modified samples were analyzed by scanning electron microscopy-energy-dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. Diffuse reflectance UV-vis spectra revealed significant reductions in the band gaps of the P25 solid precursor (3.20 eV) and the surface-modified PET–1.0Si–P25 (2.77 eV) with visible light. Accordingly, under visible light conditions, catalyst activity on the film will occur. Additionally, the film’s performance was evaluated using methylene blue (MB) degradation. Pseudo-first-order-rate constants (min−1), conversion percentages, and rates (µg.mL−1.gcat−1.h−1) were determined. The coated films were evaluated for viral Phi–X 174 inactivation and tested with fluorescence and UV-C light illumination, then log (N/N0) versus t plots (N = [virus] in plaque-forming units [PFUs]/mL) were obtained. The presence of nanosilica in PET showed a high adsorption ability in both MB and Phi–X 174, whereas the best performances with fluorescent light were obtained from PET–1.0Si–P25 and PET–P25–1.0Si–SiO2 equally. A 0.2-log virus reduction was obtained after 3 h at a rate of 4×106 PFU.mL−1.gcat−1.min−1. Additionally, the use of this film for preventing transmission by direct contact with surfaces and via indoor air was considered. Using UV light, the PET–1.0Si–P25 and PET–1.0Si–P25–SiO2 samples produced a 2.5-log inactivation after 6.5 min at a rate of 9.6×106 and 8.9×106 PFU.mL−1.gcat−1.min−1, respectively. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Zhong C, Xiong X. Preparation of a composite coating film via vapor induced phase separation for air purification and real-time bacteria photocatalytic inactivation. PROGRESS IN ORGANIC COATINGS 2021; 161:106486. [PMID: 34511697 PMCID: PMC8415738 DOI: 10.1016/j.porgcoat.2021.106486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/27/2021] [Accepted: 08/25/2021] [Indexed: 06/13/2023]
Abstract
Infectious diseases resulted from transmitting of bacteria or virus like COVID-19 via air-borne droplets have brought severe threat to human beings worldwide. Cutting the spreading paths to obtain clean air is one of the promising strategies to prevent people from such dangerous diseases. In this work, we have employed a strategy of spray coating in combination with vapor induced phase separation to prepare a composite coating film to fulfill that purpose. A stable mixture suspension containing micelles of block copolymer of poly(styrene-block-butadiene-block-styrene) and TiO2 nanoparticles was sprayed onto stainless steel mesh to evaporate solvent in non-solvent vapor atmospheres. A water vapor atmosphere and an ethanol vapor atmosphere were in turn employed to improve the mechanical strength of the obtained coating film. The porous microstructure, the porosity, and the superhydrophobicity of the coating film were carefully characterized and analyzed. The air pressure-drop of the coating film was determined to be lower than 100 Pa, indicating a high air permeability. Moreover, a foggy air containing E. coli was pressed through the coating film via a home-made apparatus to simulate the air purification system, where E. coli contained air-borne droplets were intercepted by the film matrix in a physical manner, and the bacteria was photocatalytically inactivated at the meantime. A filtration efficiency of 99.7% and a 99.6% efficiency of real-time photocatalytic inactivation of E. coli demonstrate the promising potential of the coating film.
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Affiliation(s)
- Chengtang Zhong
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China
| | - Xiaopeng Xiong
- Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China
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Mahuwala AA, Hemant V, Meharwade SD, Deb A, Chakravorty A, Grace AN, Raghavan V. Synthesis and characterisation of starch/agar nanocomposite films for food packaging application. IET Nanobiotechnol 2021; 14:809-814. [PMID: 33399112 DOI: 10.1049/iet-nbt.2020.0100] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In the present work cassava starch/agar Ag and ZnO nanocomposite films were prepared by the solution casting method. The structural, physical and antimicrobial properties of the nanocomposite films were studied as a function of the concentration of Ag and ZnO nanoparticles. The results of the thermogravimetric analysis showed 8-15% degradation of both the nanocomposite films at 150°C endorsing the thermal stability of the films. Scanning electron microscopic analysis reveals the uniform blending of Ag and ZnO nanoparticles with a starch/agar matrix with tiny waves like appearance on the surface. The incorporation of Ag and ZnO nanoparticles in the film was found to reduce the moisture content, water solubility and water vapour permeability with increase in the concentration of Ag and ZnO nanoparticles. The growth kinetics study of Pseudomonas aeruginosa and Staphylococcus aureus in the presence of Ag and ZnO blended nanocomposite films showed promising results especially against Gram-negative P. aeruginosa. Thus, the film synthesised in the present study bears the potential to be used as active packaging material to prevent food from bacterial contamination and spoilage.
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Affiliation(s)
- Arif Ali Mahuwala
- School of Biosciences & Technology, VIT University, Vellore, Tamilnadu 632014, India
| | - Vishnu Hemant
- School of Biosciences & Technology, VIT University, Vellore, Tamilnadu 632014, India
| | - Suraj D Meharwade
- School of Biosciences & Technology, VIT University, Vellore, Tamilnadu 632014, India
| | - Ananaya Deb
- School of Biosciences & Technology, VIT University, Vellore, Tamilnadu 632014, India
| | - Arghya Chakravorty
- School of Biosciences & Technology, VIT University, Vellore, Tamilnadu 632014, India
| | - Andrews Nirmala Grace
- Centre for Nanotechnology Research, VIT University, Vellore, Tamilnadu 632014, India
| | - Vimala Raghavan
- Centre for Nanotechnology Research, VIT University, Vellore, Tamilnadu 632014, India.
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Martínez-Montelongo JH, Medina-Ramírez IE, Romo-Lozano Y, Zapien JA. Development of a sustainable photocatalytic process for air purification. CHEMOSPHERE 2020; 257:127236. [PMID: 32512333 DOI: 10.1016/j.chemosphere.2020.127236] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 05/25/2020] [Accepted: 05/26/2020] [Indexed: 06/11/2023]
Abstract
Nowadays, air pollution has become a global menace being responsible of a significant increase on the morbidity and mortality of human beings. In view of this, sustainable and efficient technologies for air purification are being sought. Air purification by photocatalytic treatment has received a lot of attention due to the unspecific and high oxidation capacity of the catalyst; however still some variables must be optimized to assure practical applications. In this work, visible light active TiO2-Cu2+@perlite and Ag@TiO2-Cu2+/perlite supported materials were fabricated. TiO2-Cu2+ (2 at. %) were synthesized using a sol-gel procedure followed of the impregnation of the support by immersion. For Ag@TiO2-Cu2+, silver deposition was conducted by chemical reduction using sodium citrate and sodium borohydride. The materials (powders and supported materials) were characterized by Scanning Electron Microscopy (SEM) to demonstrate their small size and adherence to the substrate. A prototype of a photocatalytic air purifier was built. The efficacy of the prototype was evaluated for the disinfection of indoor air (dentistry clinics). The photo-catalyst was activated using visible and UVA low-cost high-energy LEDs. The antibacterial activity of the air filter was evaluated. Ag@TiO2-Cu2+ exerts better air disinfection activity at lower doses in comparison to TiO2-Cu2+. Bacterial growth inhibitions up to 99% were achieved for both, Gram-negative and Gram-positive bacteria. The incorporation of Ag and Cu to TiO2 improves the antibacterial activity of the materials due to enhanced photocatalytic activity and the synergic activity of TiO2 and dopant elements (Ag, Cu) to inhibit microorganism's growth.
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Affiliation(s)
- Jorge H Martínez-Montelongo
- Chemistry Department. Universidad Autónoma de Aguascalientes. Av. Universidad 940, Aguascalientes, Ags, Mexico
| | - Iliana E Medina-Ramírez
- Chemistry Department. Universidad Autónoma de Aguascalientes. Av. Universidad 940, Aguascalientes, Ags, Mexico.
| | | | - Juan Antonio Zapien
- Department of Materials Science and Engineering. City University of Hong Kong, Hong Kong SAR, PR China
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Gopalan AI, Lee JC, Saianand G, Lee KP, Sonar P, Dharmarajan R, Hou YL, Ann KY, Kannan V, Kim WJ. Recent Progress in the Abatement of Hazardous Pollutants Using Photocatalytic TiO 2-Based Building Materials. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1854. [PMID: 32948034 PMCID: PMC7559443 DOI: 10.3390/nano10091854] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/08/2020] [Accepted: 09/11/2020] [Indexed: 01/01/2023]
Abstract
Titanium dioxide (TiO2) has been extensively investigated in interdisciplinary research (such as catalysis, energy, environment, health, etc.) owing to its attractive physico-chemical properties, abundant nature, chemical/environmental stability, low-cost manufacturing, low toxicity, etc. Over time, TiO2-incorporated building/construction materials have been utilized for mitigating potential problems related to the environment and human health issues. However, there are challenges with regards to photocatalytic efficiency improvements, lab to industrial scaling up, and commercial product production. Several innovative approaches/strategies have been evolved towards TiO2 modification with the focus of improving its photocatalytic efficiency. Taking these aspects into consideration, research has focused on the utilization of many of these advanced TiO2 materials towards the development of construction materials such as concrete, mortar, pavements, paints, etc. This topical review focuses explicitly on capturing and highlighting research advancements in the last five years (mainly) (2014-2019) on the utilization of various modified TiO2 materials for the development of practical photocatalytic building materials (PBM). We briefly summarize the prospective applications of TiO2-based building materials (cement, mortar, concretes, paints, coating, etc.) with relevance to the removal of outdoor/indoor NOx and volatile organic compounds, self-cleaning of the surfaces, etc. As a concluding remark, we outline the challenges and make recommendations for the future outlook of further investigations and developments in this prosperous area.
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Affiliation(s)
- Anantha-Iyengar Gopalan
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
| | - Jun-Cheol Lee
- Department of Architecture, Seowon University, Cheongju 28674, Korea;
| | - Gopalan Saianand
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, New South Wales 2308, Australia; (G.S.); (R.D.)
| | - Kwang-Pill Lee
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
| | - Prashant Sonar
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD 4001, Australia;
- Centre for Material Science, Queensland University of Technology, 2 George Street, Brisbane, QLD 4001, Australia
| | - Rajarathnam Dharmarajan
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, New South Wales 2308, Australia; (G.S.); (R.D.)
| | - Yao-long Hou
- Department of Civil Engineering, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu 41566, Korea;
| | - Ki-Yong Ann
- Department of Civil and Environmental Engineering, Hanyang University, Ansan 1588, Korea;
| | | | - Wha-Jung Kim
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
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Enhanced Visible and Ultraviolet Light-Induced Gas-Phase Photocatalytic Activity of TiO2 Thin Films Modified by Increased Amount of Acetylacetone in Precursor Solution for Spray Pyrolysis. Catalysts 2020. [DOI: 10.3390/catal10091011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
TiO2 thin films, modified by acetylacetone (AcacH) in solution, were deposited on glass substrate by ultrasonic spray pyrolysis and tested for photocatalytic activity in a multi-section continuous flow reactor by degradation of acetone and acetaldehyde under ultraviolet and visible light. The increase in molar ratio of AcacH in respect of titanium (IV) isopropoxide (TTIP) from 1:5 to 1:8 modified the electronic structure of the films, favoring enhanced photocatalytic activity. The photocatalytic activity was enhanced approximately twofold on the film with molar ratio 1:8 under both irradiations; the film completely oxidized 10 ppm of acetone and acetaldehyde. The photocatalytic efficacy of TiO2 films in oxidation of air pollutants was three times higher compared to the industrial glass Pilkington ActivTM. Moreover, all the synthesized films indicate antibacterial efficiency against E. coli of over 99% under ultraviolet. TiO2 film, with TTIP:AcacH molar ratio 1:8 having great possibility for its commercial use as a material for indoor air purification.
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Yan Y, Soraru C, Keller V, Keller N, Ploux L. Antibacterial and Biofilm-Preventive Photocatalytic Activity and Mechanisms on P/F-Modified TiO2 Coatings. ACS APPLIED BIO MATERIALS 2020; 3:5687-5698. [DOI: 10.1021/acsabm.0c00467] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yige Yan
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR7515, CNRS/Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex, France
- Institut de Science des Matériaux de Mulhouse (IS2M), UMR7361, CNRS/Université de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
| | - Charline Soraru
- Institut de Science des Matériaux de Mulhouse (IS2M), UMR7361, CNRS/Université de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
| | - Valérie Keller
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR7515, CNRS/Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex, France
| | - Nicolas Keller
- Institut de Chimie et Procédés pour l’Energie, l’Environnement et la Santé (ICPEES), UMR7515, CNRS/Université de Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex, France
| | - Lydie Ploux
- BioMaterials and BioEngineering, U1121, INSERM/Université de Strasbourg-Faculté Dentaire, 11 rue Humann, 67000 Strasbourg, France
- Institut de Science des Matériaux de Mulhouse (IS2M), UMR7361, CNRS/Université de Haute Alsace, 15 rue Jean Starcky, 68057 Mulhouse Cedex, France
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12
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Photocatalytic Degradation of Different VOCs in the Gas-Phase over TiO2 Thin Films Prepared by Ultrasonic Spray Pyrolysis. Catalysts 2019. [DOI: 10.3390/catal9110915] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In this study, we deposited TiO2 thin films onto borosilicate glass by ultrasonic spray pyrolysis at 350 and 450 °C. The aim of study is to determine the effect of deposition temperature on photocatalytic activity of TiO2 thin films and to investigate the performance of TiO2 thin films on photocatalytic degradation of methyl tert-butyl ether (MTBE), acetone, acetaldehyde, and heptane as functions of different operating parameters. TiO2 thin films deposited at 350 and 450 °C have a thickness value of 190 and 330 nm, respectively. All as-prepared TiO2 films possess an anatase crystalline structure. According to the X-ray photon spectroscopy (XPS) study, the TiO2 thin film deposited at 350 °C showed a higher amount of oxygen vacancies and hydroxyl groups on the film surface after UV treatment. The aged-TiO2 thin film deposited at 350 °C showed a water contact angle (WCA) value of 0° after 10 min UV irradiation, showing superhydrophilic surface behavior. The TiO2 film deposited at 350 °C exhibited the highest amount of conversion of MTBE (100%). The results also showed that TiO2 films are capable of photocatalytic degradation of MTBE (100%) and acetaldehyde (approx. 80%) in humid air conditions and high airflow rate. The visible-light-activity of TiO2 thin films was tested with 5 ppm MTBE and acetone. TiO2 thin films deposited at 350 °C with a surface area of 600 cm2 showed 60% of MTBE and 33% of acetone degradation under VIS light.
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Dosa M, Piumetti M, Bensaid S, Andana T, Galletti C, Fino D, Russo N. Photocatalytic Abatement of Volatile Organic Compounds by TiO 2 Nanoparticles Doped with Either Phosphorous or Zirconium. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2121. [PMID: 31266240 PMCID: PMC6651007 DOI: 10.3390/ma12132121] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/25/2019] [Accepted: 06/28/2019] [Indexed: 11/16/2022]
Abstract
The aim of this work is to study the activity of novel TiO2-based photocatalysts doped with either phosphorus or zirconium under a UV-Vis source. A set of mesoporous catalysts was prepared by the direct synthesis: TiO2_A and TiO2_B (titanium oxide synthesized by two different procedures), P-TiO2 and Zr-TiO2 (binary oxides with either nonmetal or metal into the TiO2 framework). Complementary characterizations (N2 physisorption at 77 K, X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) analysis, X-ray Photoelectron Spectroscopy (XPS), and (DR)UV-Vis spectroscopy) were used to investigate the physicochemical properties of the prepared catalysts. Then, the photocatalysts were tested for the oxidation of propylene and ethylene under UV-Vis light. As a result, the most promising catalyst for both the propylene and ethylene oxidation reactions was the P-TiO2 (propylene conversion = 27.8% and ethylene conversion = 13%, TOS = 3 h), thus confirming the beneficial effect of P-doping into the TiO2 framework on the photocatalytic activity.
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Affiliation(s)
- Melodj Dosa
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
| | - Marco Piumetti
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
| | - Samir Bensaid
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
| | - Tahrizi Andana
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
| | - Camilla Galletti
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
| | - Debora Fino
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
| | - Nunzio Russo
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
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14
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Wang H, Wang L, Zhang J, Wang C, Liu Z, Gao X, Meng X, Yoo SJ, Kim JG, Zhang W, Xiao FS. Interfacial CoO x Layers on TiO 2 as an Efficient Catalyst for Solvent-Free Aerobic Oxidation of Hydrocarbons. CHEMSUSCHEM 2018; 11:3965-3974. [PMID: 30350924 DOI: 10.1002/cssc.201801709] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 09/28/2018] [Indexed: 06/08/2023]
Abstract
Construction of efficient interfaces to improve the performance of supported metal catalysts is a challenging but effective technique. A newly synthesized catalyst with layered cobalt oxide on the surface of titania (layer-CoOx /TiO2 ) is highly selective towards the aerobic oxidation of C-H bonds in a series of hydrocarbons under sustainable conditions. The layer-CoOx /TiO2 easily outperforms the state-of-the-art noble metal catalysts and homogeneous cobalt salts used in industry. In-depth structural and functional characterization reveal that the layer-CoOx /TiO2 readily reacts with O2 for the adsorption and activation of C-H bonds. The layered structure of CoOx can maximize the interfacial effect of CoOx /TiO2 leading to a good performance for the oxidation of C-H bonds.
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Affiliation(s)
- Hai Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P.R. China
| | - Liang Wang
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P.R. China
| | - Jian Zhang
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310028, P.R. China
| | - Chengtao Wang
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310028, P.R. China
| | - Ziyu Liu
- Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, P.R. China
| | - Xinhua Gao
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, P.R. China
| | - Xiangju Meng
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310028, P.R. China
| | - Seung Jo Yoo
- Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon, 34133, South Korea
| | - Jin-Gyu Kim
- Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon, 34133, South Korea
| | - Wei Zhang
- Key Laboratory of Mobile Materials MOE, Electron Microscopy Center and School of Materials Science & Engineering, Jilin University, Changchun, 130012, P.R. China
- CIC Energigune, Albert Einstein 48, 01510 Miñano, and IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
| | - Feng-Shou Xiao
- Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P.R. China
- Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310028, P.R. China
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15
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Jafari AJ, Kalantari RR, Kermani M, Firooz MH. Photocatalytic oxidation of benzene by ZnO coated on glass plates under simulated sunlight. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0621-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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16
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Ma T, Wu J, Mi Y, Chen Q, Ma D, Chai C. Novel Z-Scheme g-C 3 N 4 /C@Bi 2 MoO 6 composite with enhanced visible-light photocatalytic activity for β-naphthol degradation. Sep Purif Technol 2017. [DOI: 10.1016/j.seppur.2017.04.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Hoseinnejad M, Jafari SM, Katouzian I. Inorganic and metal nanoparticles and their antimicrobial activity in food packaging applications. Crit Rev Microbiol 2017; 44:161-181. [DOI: 10.1080/1040841x.2017.1332001] [Citation(s) in RCA: 166] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Mahmoud Hoseinnejad
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
| | - Seid Mahdi Jafari
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
| | - Iman Katouzian
- Department of Food Materials and Process Design Engineering, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran
- Nano-encapsulation in the Food, Nutraceutical, and Pharmaceutical Industries Group (NFNPIG), Universal Scientific Education and Research Network (USERN), Tehran, Iran
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18
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Ren H, Koshy P, Chen WF, Qi S, Sorrell CC. Photocatalytic materials and technologies for air purification. JOURNAL OF HAZARDOUS MATERIALS 2017; 325:340-366. [PMID: 27932035 DOI: 10.1016/j.jhazmat.2016.08.072] [Citation(s) in RCA: 132] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/01/2016] [Accepted: 08/30/2016] [Indexed: 05/13/2023]
Abstract
Since there is increasing concern for the impact of air quality on human health, the present work surveys the materials and technologies for air purification using photocatalytic materials. The coverage includes (1) current photocatalytic materials for the decomposition of chemical contaminants and disinfection of pathogens present in air and (2) photocatalytic air purification systems that are used currently and under development. The present work focuses on five main themes. First, the mechanisms of photodegradation and photodisinfection are explained. Second, system designs for photocatalytic air purification are surveyed. Third, the photocatalytic materials used for air purification and their characteristics are considered, including both conventional and more recently developed photocatalysts. Fourth, the methods used to fabricate these materials are discussed. Fifth, the most significant coverage is devoted to materials design strategies aimed at improving the performance of photocatalysts for air purification. The review concludes with a brief consideration of promising future directions for materials research in photocatalysis.
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Affiliation(s)
- Hangjuan Ren
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Pramod Koshy
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Wen-Fan Chen
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Shaohua Qi
- School of Materials Science and Engineering, UNSW Australia, Sydney, NSW 2052, Australia
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19
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Lourenço RERS, Linhares AAN, de Oliveira AV, da Silva MG, de Oliveira JG, Canela MC. Photodegradation of ethylene by use of TiO 2 sol-gel on polypropylene and on glass for application in the postharvest of papaya fruit. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:6047-6054. [PMID: 27957690 DOI: 10.1007/s11356-016-8197-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 12/01/2016] [Indexed: 06/06/2023]
Abstract
The papaya is a commercially important fruit commodity worldwide. Being a climacteric fruit, it is highly perishable. Thus, for the transportation of papaya fruit for long distances without loss of quality, it is necessary to avoid the autocatalytic effect of ethylene in accelerating the ripening of the fruit. This work addresses the application of heterogeneous photocatalysis to the degradation of ethylene. A TiO2 sol-gel supported on polypropylene (PP) and on glass was used as the catalytic material, and a UV-A lamp was employed as the radiation source. Initially, a concentration of 500 ppbv ethylene was exposed to the catalyst material irradiated by UV-A radiation. A sensitive photoacoustic spectrometer was used to monitor the photocatalytic activity. The TiO2 sol-gel supported on the glass substrate was more efficient than on the PP in degrading the ethylene. Under direct UV-A exposure, the skin appearance of 'Golden' papaya was damaged, depreciating the fruit quality and thus preventing its commercialization. However, the feasibility of the heterogeneous photocatalysis to preserve the fruit quality was achieved when ethylene was removed from the storage ambient using fans, and then, this plant hormone was degraded by a reactor set apart in a ventilation closed system.
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Affiliation(s)
- Ruth Evelyn R S Lourenço
- Grupo de Pesquisa em Química Ambiental, Lab. de Ciências Químicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil
| | - Amanda A N Linhares
- Lab. de Ciências Físicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil
| | - André Vicente de Oliveira
- Lab. de Melhoramento Genético Vegetal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil
| | - Marcelo Gomes da Silva
- Lab. de Ciências Físicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil
| | - Jurandi Gonçalves de Oliveira
- Lab. de Melhoramento Genético Vegetal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil
| | - Maria Cristina Canela
- Grupo de Pesquisa em Química Ambiental, Lab. de Ciências Químicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Avenida Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28013-602, Brazil.
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Photocatalytic and Photochemical Oxidation of Ethylene: Potential for Storage of Fresh Produce—a Review. FOOD BIOPROCESS TECH 2017. [DOI: 10.1007/s11947-017-1889-0] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Jaramillo J, Garzón BA, Mejía LT. Influence of the pH of the synthesis using sol-gel method on the structural and optical properties of TiO2. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/687/1/012099] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Bai B, Qiao Q, Li J, Hao J. Progress in research on catalysts for catalytic oxidation of formaldehyde. CHINESE JOURNAL OF CATALYSIS 2016. [DOI: 10.1016/s1872-2067(15)61007-5] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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23
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Bellissima F, Bonini M, Giorgi R, Baglioni P, Barresi G, Mastromei G, Perito B. Antibacterial activity of silver nanoparticles grafted on stone surface. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:13278-13286. [PMID: 24151026 DOI: 10.1007/s11356-013-2215-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 10/02/2013] [Indexed: 06/02/2023]
Abstract
Microbial colonization has a relevant impact on the deterioration of stone materials with consequences ranging from esthetic to physical and chemical changes. Avoiding microbial growth on cultural stones therefore represents a crucial aspect for their long-term conservation. The antimicrobial properties of silver nanoparticles (AgNPs) have been extensively investigated in recent years, showing that they could be successfully applied as bactericidal coatings on surfaces of different materials. In this work, we investigated the ability of AgNPs grafted to Serena stone surfaces to inhibit bacterial viability. A silane derivative, which is commonly used for stone consolidation, and Bacillus subtilis were chosen as the grafting agent and the target bacterium, respectively. Results show that functionalized AgNPs bind to stone surface exhibiting a cluster disposition that is not affected by washing treatments. The antibacterial tests on stone samples revealed a 50 to 80 % reduction in cell viability, with the most effective AgNP concentration of 6.7 μg/cm(2). To our knowledge, this is the first report on antimicrobial activity of AgNPs applied to a stone surface. The results suggest that AgNPs could be successfully used in the inhibition of microbial colonization of stone artworks.
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Affiliation(s)
- F Bellissima
- Department of Chemistry "Ugo Schiff" and CSGI, University of Florence, 50019 Sesto Fiorentino, Florence, Italy
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24
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Rashid J, Barakat MA, Pettit SL, Kuhn JN. InVO4/TiO2 composite for visible-light photocatalytic degradation of 2-chlorophenol in wastewater. ENVIRONMENTAL TECHNOLOGY 2014; 35:2153-2159. [PMID: 25145167 DOI: 10.1080/09593330.2014.895051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
InVO4/TiO2 composite was synthesized via amalgamation of InVO4 with TiO2 (Degussa P-25) powders. Application of the produced composite was evaluated as a catalyst for visible-light photocatalytic degradation of 2-chlorophenol (2-CP) in synthetic wastewater solutions. The catalyst was characterized by X-ray diffraction (XRD), scanning electron microscopy energy dispersive X-ray microanalyses and nitrogen physisorption. The degradation of 2-CP was affected by solution pH, light intensity, photocatalyst dosage and 2-CP initial concentration. InVO4/TiO2 showed higher photocatalytic degradation of 2-CP as compared with Degussa P-25 TiO2. Complete degradation of 2-CP was achieved with the InVO4/TiO2 catalyst under optimized conditions (1 g/L catalyst with a pollutant concentration of 50 mg/L at solution pH 5 and irradiation time of 180 min). Comparatively, 2-CP degradation efficiency of 50.5% was achieved with the TiO2 (Degussa P-25) at the same experimental conditions. The study confirmed that InVO4/TiO2 has high potential for degradation of 2-CP from wastewater under visible-light irradiation.
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25
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Abazari R, Mahjoub AR, Sanati S. A facile and efficient preparation of anatase titania nanoparticles in micelle nanoreactors: morphology, structure, and their high photocatalytic activity under UV light illumination. RSC Adv 2014. [DOI: 10.1039/c4ra10018b] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Comparative photocatalysis degradation of MB dye under ultraviolet light irradiation: (a) without photocatalyst; (b) commercial P25 TiO2 powder; and (c) TiO2 nanoparticles.
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Affiliation(s)
- Reza Abazari
- Department of Chemistry
- Tarbiat Modares University
- Tehran, Iran
| | | | - Soheila Sanati
- Department of Chemistry
- Faculty of Basic Sciences
- Azarbaijan Shahid Madani University
- Tabriz, Iran
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26
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Foam-structured activated carbon-ceramic as TiO2 supports for photocatalytic degradation of phenol. Chem Res Chin Univ 2013. [DOI: 10.1007/s40242-013-2233-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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