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Enhancing the Photocatalytic Activity of TiO2/Na2Ti6O13 Composites by Gold for the Photodegradation of Phenol. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6050069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This study aims to synthesize Au/TiO2/Na2Ti6O13 composites to reduce the occurrence of recombination and increase photocatalytic activity in phenol degradation. Gold was used due to its high stability and strong surface plasmon resonance (SPR) properties which make it operate effectively in the visible light spectrum. The prepared composites were characterized using XRD, SEM, TEM, FTIR, and DRS. The results showed that the composite consisted of rutile TiO2 with a crystal size of 38–40 nm and Na2Ti6O13 with a crystal size of 25 nm. The gold in the composite has a crystallite size of 16–19 nm along with the percentage of gold added. Morphological analysis shows that the composite has the form of inhomogeneous spherical particles with gold spread among composites with sizes less than 20 nm. FTIR analysis showed the presence of Na–O and Ti–O–Ti bonds in the composite. The best composite was 3% Au/TiO2/Na2Ti6O13 which had high crystallinity, small particle size, and bandgap energy of 2.59 eV. Furthermore, it had an efficiency 205% better than without gold. After that, cost estimation is proposed as a large-scale application. This study describes the total cost, break-even analysis, and payback analysis for the commercialization needs of the designed photocatalytic catalyst.
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Hadei M, Mesdaghinia A, Nabizadeh R, Mahvi AH, Rabbani S, Naddafi K. A comprehensive systematic review of photocatalytic degradation of pesticides using nano TiO 2. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:13055-13071. [PMID: 33483929 DOI: 10.1007/s11356-021-12576-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 01/15/2021] [Indexed: 12/07/2022]
Abstract
This study has systematically reviewed all of the research articles about the photocatalytic degradation of pesticides using titanium dioxide (TiO2) nanoparticles (NPs) and ultraviolet (UV) irradiation. Online databases were searched for peer-reviewed research articles and conference proceedings published during 2009-2019, and ultimately 112 eligible articles were included in the review. Fifty-three active ingredients of pesticides and one mixture had been investigated, most of them were organophosphorus (22%), followed by triazine derivatives (11%), chloropyridines (9%), and organochlorines (9%). Sixteen types of TiO2 with an average photodegradation efficiency of 71% were determined. Based on the type of pesticide and experimental conditions such as irradiation time, the complete photodegradation had been observed. The removal of each group of pesticides has been sufficiently discussed in the article. Effect of experimental conditions on photocatalytic activity has been investigated using linear and polynomial regressions. The strategies to reduce the required energy for this process, doping TiO2 with metal and non-metal agents, innovative reactor designs, etc., were also discussed. In conclusion, TiO2 NPs have been successful for degradation of pesticides. Future direction for research incorporates developing and application of heterogeneous doped and immobilized titania having optimized characteristics such as surface area, reactive centers, recombination rate, and phase, and capable to photo-degrade low levels of pesticides residues under solar light in an efficient full-scale size.
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Affiliation(s)
- Mostafa Hadei
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Mesdaghinia
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ramin Nabizadeh
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Center for Air Pollution Research (CAPR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Mahvi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Center for Solid Waste Research (CSWR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran
| | - Shahram Rabbani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Kazem Naddafi
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. .,Center for Air Pollution Research (CAPR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran.
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Reddy BRP, Reddy PVG, Shankar MV, Reddy BN. CuI Supported on Protonated Trititanate Nanotubes: A Reusable Catalyst for the One-Pot Synthesis of Propargylamines via A3-Coupling. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201600623] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
| | | | - Muthukonda V. Shankar
- Nano Catalysis and Solar Fuels Research Laboratory; Department of Materials Science&Nanotechnology; Yogi Vemana University; Kadapa- 516 003 Andhra Pradesh India
| | - Bijivemula N. Reddy
- Department of Chemistry; Vellore Institute of Technology; Vellore- 632014 Tamil Nadu India
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Meng F, Liu Y, Xue T, Su Q, Wang W, Qi T. Structures, formation mechanisms, and ion-exchange properties of α-, β-, and γ-Na2TiO3. RSC Adv 2016. [DOI: 10.1039/c6ra16984h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The structure of β-Na2TiO3 was refined. The formation/transformation mechanisms and ion-exchange properties of α-, β-, and γ-Na2TiO3 were investigated.
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Affiliation(s)
- Fancheng Meng
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Yahui Liu
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Tianyan Xue
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Qian Su
- Key Laboratory of Green Process and Engineering
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Weijing Wang
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Tao Qi
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
- China
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Liu W, Zhao X, Borthwick AGL, Wang Y, Ni J. Dual-Enhanced Photocatalytic Activity of Fe-Deposited Titanate Nanotubes Used for Simultaneous Removal of As(III) and As(V). ACS APPLIED MATERIALS & INTERFACES 2015; 7:19726-35. [PMID: 26302042 DOI: 10.1021/acsami.5b05263] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Fe-deposited titanate nanotubes (Fe-TNTs) with high photocatalytic activity and adsorptive performance were synthesized through a one-step hydrothermal method. Initial As(III) oxidation followed by As(V) adsorption by Fe-TNTs could simultaneously remove these two toxic pollutants from aqueous solutions. The apparent rate constant value for photo-oxidation of As(III) under UV irradiation by Fe-TNTs was almost 250 times that of unmoidified TNTs. Under visible light, the Fe-TNTs also exhibited enhanced photocatalytic activity after Fe was deposited. Fe3+ located in the interlayers of TNTs acted as temporary electron- or hole-trapping sites, and attached α-Fe2O3 played the role of a charge carrier for electrons transferred from TNTs. These two effects inhibited electron-hole pair recombination thus promoting photocatalysis. Moreover, the As(V) adsorptive performance of Fe-TNTs also improved, owing to the presence of additional adsorption sites, α-Fe2O3, as well as increased pHPZC. Furthermore, Fe-TNTs exhibited good photocatalytic and adsorptive performace even after 5 reuse cycles. The present tests, concerning an initial As(III) photocatalysis and subsequent As(V) adsorption process, highlight the feasibility and importance of Fe used to modify TNTs. This study proposes a feasible method to simultaneously remove As(III) and As(V) from contaminated water using a novel Ti-based nanomaterial.
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Affiliation(s)
- Wen Liu
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University , Beijing 100871, China
- Environmental Engineering Program, Department of Civil Engineering, Auburn University , Auburn, Alabama 36849, United States
| | - Xiao Zhao
- Environmental Engineering Program, Department of Civil Engineering, Auburn University , Auburn, Alabama 36849, United States
| | - Alistair G L Borthwick
- Institute of Energy Systems, School of Engineering, The University of Edinburgh , The King's Buildings, Edinburgh EH9 3JL, United Kingdom
| | - Yanqi Wang
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University , Beijing 100871, China
| | - Jinren Ni
- The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering, Peking University , Beijing 100871, China
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Zhang P, Guo J, Zhao P, Zhu B, Huang W, Zhang S. Promoting effects of lanthanum on the catalytic activity of Au/TiO2 nanotubes for CO oxidation. RSC Adv 2015. [DOI: 10.1039/c4ra14133d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
TEM image of Au/La2O3–TiO2-NTs. Gold particles were distributed homogeneously on La modified TiO2 NTs.
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Affiliation(s)
- Ping Zhang
- Key Laboratory of Advanced Energy Material Chemistry (MOE)
- Tianjin Key Lab of Metal and Molecule Based Material Chemistry
- and Department of Chemistry
- Nankai University
- Tianjin 300071
| | - Jiuli Guo
- Key Laboratory of Advanced Energy Material Chemistry (MOE)
- Tianjin Key Lab of Metal and Molecule Based Material Chemistry
- and Department of Chemistry
- Nankai University
- Tianjin 300071
| | - Peng Zhao
- Key Laboratory of Advanced Energy Material Chemistry (MOE)
- Tianjin Key Lab of Metal and Molecule Based Material Chemistry
- and Department of Chemistry
- Nankai University
- Tianjin 300071
| | - Bolin Zhu
- Key Laboratory of Advanced Energy Material Chemistry (MOE)
- Tianjin Key Lab of Metal and Molecule Based Material Chemistry
- and Department of Chemistry
- Nankai University
- Tianjin 300071
| | - Weiping Huang
- Key Laboratory of Advanced Energy Material Chemistry (MOE)
- Tianjin Key Lab of Metal and Molecule Based Material Chemistry
- and Department of Chemistry
- Nankai University
- Tianjin 300071
| | - Shoumin Zhang
- Key Laboratory of Advanced Energy Material Chemistry (MOE)
- Tianjin Key Lab of Metal and Molecule Based Material Chemistry
- and Department of Chemistry
- Nankai University
- Tianjin 300071
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Sharma T, Toor AP, Rajor A. Photocatalytic degradation of imidacloprid in soil: application of response surface methodology for the optimization of parameters. RSC Adv 2015. [DOI: 10.1039/c5ra02224j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The photocatalytic mineralization of imidacloprid (IMI) in soil to inorganic ions and the formation of various intermediates using TiO2 as the photocatalyst have been investigated under UV light.
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Affiliation(s)
- Teena Sharma
- School of Energy & Environment
- Thapar University
- Patiala 147004
- India
| | - Amrit Pal Toor
- Dr S. S. Bhatnagar University Institute of Chemical Engg. & Tech
- Panjab University
- Chandigarh
- India
| | - Anita Rajor
- School of Energy & Environment
- Thapar University
- Patiala 147004
- India
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