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Yang J, Ruan Z, Jiang S, Xia P, Yang Q, Zhang Q, Xiao C, Xie Y. Ce-Doped W 18O 49 Nanowires for Tuning N 2 Activation toward Direct Nitrate Photosynthesis. J Phys Chem Lett 2021; 12:11295-11302. [PMID: 34779639 DOI: 10.1021/acs.jpclett.1c03207] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nitrate acts as a fundamental raw material in modern industrial and agricultural fields. Recently, photocatalytic nitrogen oxidation into nitrate has been expected to be an alternative method to replace the industrial nitrate synthesis process, which encounters many challenges, i.e., huge energy consumption and greenhouse gas emission. We synthesized Ce-doped W18O49 nanowires (Ce-W18O49) to realize photocatalytic nitrogen oxidation into nitrate under mild conditions. The defect state generated by coupling of Ce3+ introduction and surface plasma state acts as an "electron trap" to restrain photogenerated electrons, so as to facilitate the separation of photogenerated electron-hole pairs and prolong their lifetime. W18O49 doped with 5 mol % Ce exhibited the highest yield of nitrate (319.97 μg g-1 h-1) without any sacrificial agent, which is about 5 times higher than that of pristine W18O49. This work provides new insight into achieving high-efficiency photocatalytic nitrate evolution activity from direct N2 oxidation by controlling the energy band structure of photocatalysts.
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Affiliation(s)
- Jingjing Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhoushilin Ruan
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Shenlong Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Pengfei Xia
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Qinghua Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Qun Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Chong Xiao
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, P. R. China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui 230031, P. R. China
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Luu TVH, Nguyen QB, Dao NN, Luu MD, Doan VD, Pham NC, Duong TL, Pham NN. A comparative study of 0D and 1D Ce-ZnO nanocatalysts in photocatalytic decomposition of organic pollutants. RSC Adv 2021; 11:36078-36088. [PMID: 35492758 PMCID: PMC9043341 DOI: 10.1039/d1ra07493h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 11/02/2021] [Indexed: 11/21/2022] Open
Abstract
Nanosized zinc oxide is an intriguing material that can be applied in various fields. In this study, Ce doped ZnO nano-catalysts (Ce-ZnO) were synthesized by two different methods (i.e., hydrothermal (Ce-ZnO-HT) and polymer gel combustion (Ce-ZnO-CB) methods) to compare their photodegradation efficiency. The prepared material characteristics were investigated using XRD, SEM, TEM, FTIR, UV-Vis, PL, XPS, EDS, and BET. The bandgap of both nanoparticles (NPs) was 2.95 eV, despite the fact that the morphology of Ce-ZnO-HT NPs was 1D-rod-shaped and that of Ce-ZnO-CB NPs was 0D-spherical. However, the surface area and oxygen vacancy rate of Ce-ZnO-HT NPs were higher than those of Ce-ZnO-CB NPs. These differences are directly related to the photocatalytic activity of Ce-ZnO NPs. Accordingly, the results showed that photocatalytic efficiency was classified in the order Ce-ZnO-HT > Ce-ZnO-CB > pure ZnO, and the photocatalytic reaction rate constant of Ce-ZnO-HT used to decompose MB was 3.0 times higher than that of Ce-ZnO-CB. Interestingly, the photodegradation mechanism study revealed that hydroxyl radicals and holes were shown to be more important contributors to methyl blue degradation than photo-induced electrons and superoxide radical ions. Ce doped ZnO nano-catalysts were synthesized by two different methods i.e., hydrothermal and polymer gel combustion method, to compare their photodegradation efficiency.![]()
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Affiliation(s)
- Thi Viet Ha Luu
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City Ho Chi Minh City 70000 Vietnam
| | - Quang Bac Nguyen
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam .,Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Ngoc Nhiem Dao
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam .,Graduate University of Science and Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Minh Dai Luu
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Van Dat Doan
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City Ho Chi Minh City 70000 Vietnam
| | - Ngoc Chuc Pham
- Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Thi Lim Duong
- Institute of Geography, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi 10000 Vietnam
| | - Ngo Nghia Pham
- Faculty of Chemistry, VNU - University of Science 334 Nguyen Trai Hanoi 10000 Vietnam
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He P, Zhao Z, Tan Y, E H, Zuo M, Wang J, Yang J, Cui S, Yang X. Photocatalytic Degradation of Deoxynivalenol Using Cerium Doped Titanium Dioxide under Ultraviolet Light Irradiation. Toxins (Basel) 2021; 13:481. [PMID: 34357953 PMCID: PMC8310149 DOI: 10.3390/toxins13070481] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/01/2021] [Accepted: 07/09/2021] [Indexed: 11/16/2022] Open
Abstract
Deoxynivalenol (DON) is a major mycotoxin with high toxicity that often contaminates grains, foods and feeds. The traditional approaches for DON removal are difficult to meet industry and agriculture demands due to the high stability of the DON molecule. Therefore, there is an urgent need to develop green and effective strategies for DON degradation. In this study, a batch of photocatalytic nanomaterials of cerium (Ce) doped titanium dioxide (TiO2) were successfully prepared by sol-gel method. The catalysts were systematically characterized by XRD, HRTEM, FT-IR, UV-Vis and XPS. The catalyst 0.5Ce-TiO2 showed superior photocatalytic activity for DON degradation in aqueous solution under ultraviolet light irradiation, better than that of traditional photocatalyst pure TiO2, and 96% DON with initial concentration of 5.0 mg/L could be degraded in 4 h. In addition, the two possible degradation intermediate products C5H8O3 and C17H18O6 were identified, the photocatalytic degradation mechanism and degradation pathway were studied. The results indicate that Ce doped TiO2 photocatalyst can be used to reduce DON effectively.
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Affiliation(s)
- Pengzhen He
- College of Chemistry and Chemical Engineering, Mu Danjiang Normal University, Mu Danjiang 157012, China; (P.H.); (M.Z.)
- Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (H.E.); (J.W.); (J.Y.)
| | - Zhiyong Zhao
- Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (H.E.); (J.W.); (J.Y.)
| | - Yanglan Tan
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Chinese Academy of Sciences, Shanghai 200031, China;
| | - Hengchao E
- Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (H.E.); (J.W.); (J.Y.)
| | - Minghui Zuo
- College of Chemistry and Chemical Engineering, Mu Danjiang Normal University, Mu Danjiang 157012, China; (P.H.); (M.Z.)
| | - Jianhua Wang
- Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (H.E.); (J.W.); (J.Y.)
| | - Junhua Yang
- Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (H.E.); (J.W.); (J.Y.)
| | - Shuxin Cui
- College of Chemistry and Chemical Engineering, Mu Danjiang Normal University, Mu Danjiang 157012, China; (P.H.); (M.Z.)
| | - Xianli Yang
- Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China; (Z.Z.); (H.E.); (J.W.); (J.Y.)
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Abstract
Chromium borides are promising candidates for several structural applications including protective coatings for materials exposed to corrosive and abrasive environments. In this paper the pulsed laser deposition of chromium diboride-rich thin films has been carried out in vacuum by using a frequency doubled Nd:glass laser with a pulse duration of 250 fs. The films have been deposited at different substrate temperatures and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. Lastly, the film’s hardness has been studied by Vickers indentation technique. The results indicate that only the films deposited at a substrate temperature of 500 °C are crystalline and formed by chromium diboride, together with a certain amount of boron and chromium, which suggests that, as main mechanism, a process taking place on the surface from atoms and ions from the gas phase. This hypothesis has been confirmed by the study of the plasma produced by the ablation process.
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Sabbagh S, Behnajady MA. Synthesis of TiO 2 (B) and High-temperature Stable Anatase TiO 2 Nanowires by Hydrothermal Method and Investigation of Photocatalytic Activity. Photochem Photobiol 2018; 95:733-739. [PMID: 30468513 DOI: 10.1111/php.13051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 10/30/2018] [Indexed: 12/27/2022]
Abstract
In this study, TiO2 nanowires (TNWs) were synthesized through hydrothermal method and were characterized using X-Ray diffraction (XRD), transmission electron microscopy (TEM) and BET techniques. Monoclinic TiO2 (B) is the dominant phase of TNWs up to 600°C which is completely transformed into a highly crystalline anatase phase at 800°C. The photocatalytic activity of TNWs, prepared at various calcination temperatures, was investigated in the removal of Rhodamine B as an organic model pollutant. The results indicated that the photocatalytic activity of TNWs, prepared at 800°C calcination temperature, was better than that of other samples and even TiO2 -P25 nanoparticles.
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Affiliation(s)
- Shervin Sabbagh
- Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran
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Wan S, Ou M, Zhong Q, Zhang S. Z-scheme CaIn2S4/Ag3PO4 nanocomposite with superior photocatalytic NO removal performance: fabrication, characterization and mechanistic study. NEW J CHEM 2018. [DOI: 10.1039/c7nj03588h] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Z-scheme CaIn2S4/Ag3PO4 photocatalyst with superior photocatalytic NO removal performance was fabricated and characterized, and mechanistic analysis was also carried out.
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Affiliation(s)
- Shipeng Wan
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
| | - Man Ou
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
| | - Qin Zhong
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
| | - Shule Zhang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
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Kannan S, Mohanraj K, Sivakumar G. Preparation of Bifunctional CuWO4
-Based Heterostructure Nanocomposites for Noble-Metal-Free Photocatalysts. ChemistrySelect 2017. [DOI: 10.1002/slct.201700877] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Selvaraj Kannan
- Department of Physics; Manonmaniam Sundaranar University; Tirunelveli - 627012, Tamil Nadu India
| | - Kannusamy Mohanraj
- Department of Physics; Manonmaniam Sundaranar University; Tirunelveli - 627012, Tamil Nadu India
| | - Ganesan Sivakumar
- Centralised Instrumentation and Service Laboratory; Department of Physics; Annamalai University; Annamalai Nagar- 608002, Tamil Nadu India
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Review on Undoped/Doped TiO2Nanomaterial; Synthesis and Photocatalytic and Antimicrobial Activity. J CHIN CHEM SOC-TAIP 2016. [DOI: 10.1002/jccs.201600735] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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