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Sheng S, Song S, Hu B, Fu J, Liu C, Tao W. Photocatalytic reduction of Cr(VI) using newly synthesized black phosphorus/ZnO nanocomposites. ENVIRONMENTAL TECHNOLOGY 2024; 45:3396-3404. [PMID: 37195020 DOI: 10.1080/09593330.2023.2215938] [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: 10/14/2022] [Accepted: 02/18/2023] [Indexed: 05/18/2023]
Abstract
Removal of high toxic Cr(VI) with solar plays an important role in improving water pollution, but is facing a dilemma of developing excellent photocatalysts with high conversion efficiency and low cost. Different from traditional nano-structuring, this work focuses on the interfacial hybridization by considering the intrinsic difference in bonding interaction. Herein, we intentionally make some layered black phosphorus (BP) sheets with Van der Waals interaction to bond with ZnO surfaces, in which some additional electron channels can be formed by this multilevel atomic hybridization to accelerate carrier transfer and separation. Compared to the pristine ZnO and BP nanosheets, the light absorption and carrier separation efficiency can be sharply enhanced by this particular electronic structure, which makes the Cr reduction performance enhanced about 7.1 times. Our findings suggest a new insight into accelerating Cr(VI) reduction by designing interfacial atom hybridization.
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Affiliation(s)
- Sheng Sheng
- PowerChina Huadong Engineering Corporation Limited, Hangzhou, People's Republic of China
| | - Siyuan Song
- PowerChina Huadong Engineering Corporation Limited, Hangzhou, People's Republic of China
| | - Bin Hu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, People's Republic of China
| | - Jingjing Fu
- PowerChina Huadong Engineering Corporation Limited, Hangzhou, People's Republic of China
| | - Chongchong Liu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, People's Republic of China
| | - Weixiang Tao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, People's Republic of China
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2
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Li BH, Zhang KH, Wang XJ, Li YP, Liu X, Han BH, Li FT. Construction synergetic adsorption and activation surface via confined Cu/Cu 2O and Ag nanoparticles on TiO 2 for effective conversion of CO 2 to CH 4. J Colloid Interface Sci 2024; 660:961-973. [PMID: 38281477 DOI: 10.1016/j.jcis.2024.01.159] [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: 11/14/2023] [Revised: 01/04/2024] [Accepted: 01/22/2024] [Indexed: 01/30/2024]
Abstract
High-performance photocatalysts for catalytic reduction of CO2 are largely impeded by inefficient charge separation and surface activity. Reasonable design and efficient collaboration of multiple active sites are important for attaining high reactivity and product selectivity. Herein, Cu-Cu2O and Ag nanoparticles are confined as dual sites for assisting CO2 photoreduction to CH4 on TiO2. The introduction of Cu-Cu2O leads to an all-solid-state Z-scheme heterostructure on the TiO2 surface, which achieves efficient electron transfer to Cu2O and adsorption and activation of CO2. The confined nanometallic Ag further enhances the carrier's separation efficiency, promoting the conversion of activated CO2 molecules to •COOH and further conversion to CH4. Particularly, this strategy is highlighted on the TiO2 system for a photocatalytic reduction reaction of CO2 and H2O with a CH4 generation rate of 62.5 μmol∙g-1∙h-1 and an impressive selectivity of 97.49 %. This work provides new insights into developing robust catalysts through the artful design of synergistic catalytic sites for efficient photocatalytic CO2 conversion.
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Affiliation(s)
- Bo-Hui Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Kai-Hua Zhang
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xiao-Jing Wang
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
| | - Yu-Pei Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Xinying Liu
- Institute for the Development of Energy for African Sustainability (IDEAS), University of South Africa (UNISA), Florida 1710, South Africa
| | - Bao-Hang Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Fa-Tang Li
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China.
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Niu X, He H, Ran H, Wu Z, Tang Y, Wu Y. Rapid colorimetric sensor for ultrasensitive and highly selective detection of Fumonisin B1 in cereal based on laccase-mimicking activity of silver phosphate nanoparticles. Food Chem 2023; 429:136903. [PMID: 37487390 DOI: 10.1016/j.foodchem.2023.136903] [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: 03/10/2023] [Revised: 06/26/2023] [Accepted: 07/03/2023] [Indexed: 07/26/2023]
Abstract
Ag3PO4 nanoparticles (NPs) was prepared through a facile coprecipitation method, and was first found to have excellent laccase-mimicking catalytic activity. The study confirms that Fumonisin B1 (FB1) can effectively hinder the production of superoxide anion (O2-) between Ag3PO4 NPs and dissolved oxygen, and further inhibit laccase-mimicking activity of Ag3PO4 NPs. Thus, a novel rapid colorimetric sensor for FB1 analysis in cereal was first established using laccase-mimicking activity as sensing signal. The absorbance variation of sensing solution is directly related to the amount of FB1, and the color change is further combined with smartphone for quantitively analysis of FB1. The limit of detection (LOD) of the sensor is determined as low as 1.73 μg·L-1, which is far lower than the maximum residue limits (MRLs) of FB1 set by European Commission and US Food and Drug Administration (FDA). The average recovery of 87.8-104.5% for FB1 detection was obtained in cereal.
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Affiliation(s)
- Xiaojuan Niu
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China; College of Life Sciences, Guizhou Normal University, Guiyang 550001, China
| | - Huanhuan He
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
| | - Hang Ran
- Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
| | - Zhen Wu
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China
| | - Yue Tang
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China
| | - Yuangen Wu
- Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-bioengineering, Guizhou University, Guiyang 550025, China; Guizhou Province Key Laboratory of Fermentation Engineering and Biopharmacy, School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
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4
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Falara PP, Ibrahim I, Zourou A, Sygellou L, Sanchez DE, Romanos GE, Givalou L, Antoniadou M, Arfanis MK, Han C, Terrones M, Kordatos KV. Bi-functional photocatalytic heterostructures combining titania thin films with carbon quantum dots (C-QDs/TiO 2) for effective elimination of water pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:124976-124991. [PMID: 37160858 PMCID: PMC10754734 DOI: 10.1007/s11356-023-27285-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 04/24/2023] [Indexed: 05/11/2023]
Abstract
In this study, carbon quantum dots (C-QDs), prepared via hydrothermal-microwave procedures, were successfully combined with nanostructured titania (TiO2). The photocatalytic oxidation/reduction activity of the C-QDs/TiO2 composite films was evaluated in the decomposition of organic-inorganic contaminants from aqueous solutions under UV illumination. Physicochemical characterizations were applied to investigate the crystal structure of the carbon quantum dots and the composites. It was found that the prepared C-QDs/TiO2 composites had great contribution to the photocatalytic reduction of hexavalent chromium (Cr+6) species and 4-Nitrophenol (PNP) as well as to the photocatalytic oxidation of methylene blue (MB) and Rhodamine B (RhB) dyes. The mechanism of the photocatalytic reaction was studied with trapping experiments, revealing that the electron (e-) radical species were powerfully supported for the photocatalytic reduction of Cr+6 and PNP and the holes (h+) are the main active species for the photocatalytic oxidation reactions.
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Affiliation(s)
- Pinelopi P Falara
- School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., 15780 Zografou, Athens, Greece
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", 15341 Agia Paraskevi, Athens, Greece
| | - Islam Ibrahim
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", 15341 Agia Paraskevi, Athens, Greece
- Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, Cairo, 11884, Egypt
| | - Adamantia Zourou
- School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., 15780 Zografou, Athens, Greece
| | - Labrini Sygellou
- Foundation of Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT), POB 1414, GR-26504, Patras, Greece
| | - David Emanuel Sanchez
- Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA, 16802, USA
| | - George Em Romanos
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", 15341 Agia Paraskevi, Athens, Greece
| | - Lida Givalou
- School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., 15780 Zografou, Athens, Greece
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", 15341 Agia Paraskevi, Athens, Greece
| | - Maria Antoniadou
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", 15341 Agia Paraskevi, Athens, Greece
- Department of Chemical Engineering, University of Western Macedonia, ZEP, 50100, Kozani, Greece
| | - Michalis K Arfanis
- Institute of Nanoscience and Nanotechnology, National Center for Scientific Research "Demokritos", 15341 Agia Paraskevi, Athens, Greece
| | - Changseok Han
- Department of Environmental Engineering, INHA University, 100 Inha-ro, Michuhol-gu, Incheon, 22212, South Korea
- Program in Environmental & Polymer Engineering, Graduate School of INHA University, 100 Inha-ro, Michuhol-gu, Incheon, 22212, South Korea
| | - Mauricio Terrones
- Department of Materials Science and Engineering and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, PA, 16802, USA
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
- Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Konstantinos V Kordatos
- School of Chemical Engineering, National Technical University of Athens, 9 Iroon Polytechniou St., 15780 Zografou, Athens, Greece.
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Mergbi M, Galloni MG, Aboagye D, Elimian E, Su P, Ikram BM, Nabgan W, Bedia J, Amor HB, Contreras S, Medina F, Djellabi R. Valorization of lignocellulosic biomass into sustainable materials for adsorption and photocatalytic applications in water and air remediation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27484-2. [PMID: 37227629 DOI: 10.1007/s11356-023-27484-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 05/03/2023] [Indexed: 05/26/2023]
Abstract
An exponential rise in global pollution and industrialization has led to significant economic and environmental problems due to the insufficient application of green technology for the chemical industry and energy production. Nowadays, the scientific and environmental/industrial communities push to apply new sustainable ways and/or materials for energy/environmental applications through the so-called circular (bio)economy. One of today's hottest topics is primarily valorizing available lignocellulosic biomass wastes into valuable materials for energy or environmentally related applications. This review aims to discuss, from both the chemistry and mechanistic points of view, the recent finding reported on the valorization of biomass wastes into valuable carbon materials. The sorption mechanisms using carbon materials prepared from biomass wastes by emphasizing the relationship between the synthesis route or/and surface modification and the retention performance were discussed towards the removal of organic and heavy metal pollutants from water or air (NOx, CO2, VOCs, SO2, and Hg0). Photocatalytic nanoparticle-coated biomass-based carbon materials have proved to be successful composites for water remediation. The review discusses and simplifies the most raised interfacial, photonic, and physical mechanisms that might take place on the surface of these composites under light irradiation. Finally, the review examines the economic benefits and circular bioeconomy and the challenges of transferring this technology to more comprehensive applications.
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Affiliation(s)
- Meriem Mergbi
- Faculty of Sciences of Gabes, RL Processes, Energetic, Environment and Electric Systems (PEESE), University of Gabes, 6072, Gabes, Tunisia
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Melissa Greta Galloni
- Dipartimento di Chimica, Università Degli Studi Di Milano, Via Golgi 19, 20133, Milano, Italy
| | - Dominic Aboagye
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Ehiaghe Elimian
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
- Department of Plant Biology and Biotechnology, Faculty of Life Sciences, University of Benin, PMB 1154, Benin City, Nigeria
| | - Peidong Su
- School of Chemical & Environmental Engineering, China University of Mining & Technology (Beijing), Beijing, 100083, China
| | - Belhadj M Ikram
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Walid Nabgan
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
- Department of Chemical and Environmental Engineering, Malaysia Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, 54100, Kuala Lumpur, Malaysia
| | - Jorge Bedia
- Chemical Engineering Department, Autonomous University of Madrid, Madrid, Spain
| | - Hedi Ben Amor
- Faculty of Sciences of Gabes, RL Processes, Energetic, Environment and Electric Systems (PEESE), University of Gabes, 6072, Gabes, Tunisia
| | - Sandra Contreras
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Francisco Medina
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain
| | - Ridha Djellabi
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain.
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Huang H, Tao X, Niu Z, Qin X, Ren J, Shan B, Liu Y, Ren J. Construction of magnetically recoverable MnZnFe 2O 4@Ag 3PO 4 Z-scheme photocatalyst for rapid visible-light-driven phenol degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:32095-32107. [PMID: 36462080 DOI: 10.1007/s11356-022-24479-3] [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: 08/23/2022] [Accepted: 11/26/2022] [Indexed: 06/17/2023]
Abstract
Visible-light-driven magnetic heterojunction as a promising photocatalysts has received much attention in environmental remediation. In this work, novel Z-scheme heterojunction MnZnFe2O4@Ag3PO4 (MZFO@APO) magnetic photocatalysts with excellent visible-light-driven photocatalytic activity are successfully constructed and characterized. The photocatalytic activity for phenol degradation is measured, and photodegradation mechanism is investigated with EPR, radical trapping experiments, and LC-MS. It turns out that the heterojunction introduced MZFO exhibits good adsorption effect on visible light and the direct Z-scheme bandgap alignment of MZFO and APO significantly improves charge separation and electron transfer, outperforming that of pure APO. MZFO@APO-40% with 40% APO content shows the rapid photodegradation performance, obtaining a 100% removal efficiency of phenol (25 mg L-1) after 12-min visible light irradiation, and its kinetic constants are approximately 25.3 and 4.9 times higher than that of P25 TiO2 and pure APO, respectively. Especially, MZFO@APO-40% also possesses a high magnetic separation property and can be efficiently reused for 5 cycles. Additionally, EPR and radical trapping experiments confirm that h+, O2-, and 1O2 are the main active species in the photocatalytic process. Hydroquinone and small molecular organic acids such as maleic acid and oxalic acid are detected by LC-MS, which further indicates that the pathway of phenol degradation involves hydroxylation, open-ring reactions, and mineralization reactions. The novel addition of MZFO in photocatalyst construction has the potential to promote its application in environmental remediation.
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Affiliation(s)
- Hua Huang
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China
- Yan'an Key Laboratory of Agricultural Solid Waste Resource Utilization, 716000, Yan'an, Shaanxi, China
- Shaanxi Engineering and Technological Research Center for Conversation and Utilization of Regional Biological Resources, 716000, Yan'an, Shaanxi, China
| | - Xin Tao
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China
| | - Zhirui Niu
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China.
- Yan'an Key Laboratory of Agricultural Solid Waste Resource Utilization, 716000, Yan'an, Shaanxi, China.
- Shaanxi Engineering and Technological Research Center for Conversation and Utilization of Regional Biological Resources, 716000, Yan'an, Shaanxi, China.
| | - Xiaoqian Qin
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China
| | - Jialu Ren
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China
| | - Baoqin Shan
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China
- Yan'an Key Laboratory of Agricultural Solid Waste Resource Utilization, 716000, Yan'an, Shaanxi, China
| | - Yu Liu
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China
- Yan'an Key Laboratory of Agricultural Solid Waste Resource Utilization, 716000, Yan'an, Shaanxi, China
| | - Jingyu Ren
- School of Petroleum Engineering and Environmental Engineering, Yan'an University, 716000, Yan'an, Shaanxi, China
- Yan'an Key Laboratory of Agricultural Solid Waste Resource Utilization, 716000, Yan'an, Shaanxi, China
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Nouacer S, Djellabi R. Easy-handling semi-floating TiO 2-based aerogel for solar photocatalytic water depollution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:22388-22395. [PMID: 36287366 DOI: 10.1007/s11356-022-23772-5] [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: 08/10/2022] [Accepted: 10/18/2022] [Indexed: 06/16/2023]
Abstract
One of the capital issues of photocatalytic technology is how to use photocatalytic materials in real world conditions. Suspension photocatalysts are the most effective, while the handling and recovery of nanoparticles are very challenging and costly. Herein, we report the design of semi-floating aerogel TiO2-based photocatalyst for the oxidation of dyes and photoreduction of Cr(VI). TiO2 aerogel-based photocatalyst was fabricated through in situ polymerization using borax, poly(vinyl alcohol) and polyvinylidene in the presence of H2O2 as a catalyst. Cubic TiO2 aerogel of few centimetres was designed for the photocatalytic tests under solar light irradiation. TiO2 aerogel showed a good photoactivity against the oxidation of three types of dyes and Cr(VI) photoreduction. In terms of dyes, the kinetics of methylene blue oxidation was the fastest as compared to rhodamine B and methyl red, while, a total reduction of Cr(VI) at 10 ppm was obtained within 30 min after the addition of tartaric acid as hole scavenger. TiO2 aerogel can be easily recovered, washed and recycled. TiO2 aerogel can move freely from the top to the deep solution. The semi-floating property could be an advantage to enhance the mass transfer along with bulk solution, as compared to totally floating-based photocatalysts.
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Affiliation(s)
- Sana Nouacer
- Laboratory of Water Treatment and Valorization of Industrial Wastes, Chemistry Department, Faculty of Sciences, Badji-Mokhtar University, BP12 2300, Annaba, Algeria
- École Nationale Supérieure Des Mines Et MétallurgieENSMM, Ex CEFOS Chaiba, BP 233 RP Annaba, W129, Sidi Amar, Algeria
| | - Ridha Djellabi
- Department of Chemical Engineering, Universitat Rovira I Virgili, 43007, Tarragona, Spain.
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Enhanced Photocatalytic Kinetics Using HDTMA Coated TiO2-Smectite Composite for the Oxidation of Diclofenac under Solar Light. Catalysts 2022. [DOI: 10.3390/catal13010051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Slow kinetics is one of the capital issues of photocatalytic technology because of its heterogeneous nature, which involves multi-step processes. Herein, we show that the simple modification of the sol-gel-based TiO2-smectite composite by hexadecyltrimethylammonium bromide (HDTMA) significantly boosts adsorption and photocatalytic efficient sol-gel-based light towards the removal of diclofenac from water. Three photocatalysts were prepared, including TiO2, TiO2-smectite, and HDTMA-TiO2-smectite. The materials were characterized to understand the surface interaction and crystal characteristics. In terms of photoactivity, it was found that the addition of HDTMA to TiO2-smectite improved the removal rate by twice. HDTMA changes the functional groups to TiO2-smectite composite allowing enhanced adsorption and photoactivity through the so-called Adsorb and Shuttle process. The recycling tests show that HDTMA-TiO2-smectite can be used up to four times with good performance. This modification approach could intensify the removal of pollutants from water instead of using complicated and costly techniques.
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Bhattacharjee B, Ahmaruzzaman M, Djellabi R, Elimian E, Rtimi S. Advances in 2D MXenes-based materials for water purification and disinfection: Synthesis approaches and photocatalytic mechanistic pathways. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 324:116387. [PMID: 36352727 DOI: 10.1016/j.jenvman.2022.116387] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/22/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
MXenes two-dimensional materials have recently excited researchers' curiosity for various industrial applications. MXenes are promising materials for environmental remediation technologies to sense and mitigate various intractable hazardous pollutants from the atmosphere due to their inherent mechanical and physicochemical properties, such as high surface area, increased hydrophilicity, high conductivity, changing band gaps, and robust electrochemistry. This review discusses the versatile applications of MXenes and MXene-based nanocomposites in various environmental remediation processes. A brief description of synthetic procedures of MXenes nanocomposites and their different properties are highlighted. Afterward, the photocatalytic abilities of MXene-based nanocomposites for degrading organic pollutants, removal of heavy metals, and inactivation of microorganisms are discussed. In addition, the role of MXenes anti-corrosion support in the lifetime of some semiconductors was addressed. Current challenges and future perspectives toward the application of MXene materials for environmental remediation and energy production are summarized for plausible real-world use.
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Affiliation(s)
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology Silchar, 788010, Assam, India.
| | - Ridha Djellabi
- Department of Chemical Engineering, Universitat Rovira i Virgili, 43007, Tarragona, Spain
| | - Ehiaghe Elimian
- Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Sami Rtimi
- Global Institute for Water, Environment and Health, 1201, Geneva, Switzerland.
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