光催化还原Cd(II)的过氧溶胶-凝胶法合成多孔N掺杂TiO2

D. V. Wellia, Dina Nofebriani, Nurul Pratiwi, Safni Safni
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引用次数: 3

摘要

以聚乙二醇(PEG)为模板剂,采用环境友好的过氧溶胶-凝胶法成功合成了多孔N掺杂TiO2光催化剂。本文系统地研究了在过氧钛水溶液中加入PEG对所获得的光催化剂的结构、孔性能和光催化活性的影响。通过X射线衍射(XRD)、UV-Vis漫反射光谱(DRS)和Brunauer-Emmett-Teller(BET)对制备的光催化剂进行了表征。研究发现,氮的掺杂使TiO2的带隙变窄,从而增强了其可见光响应。BET分析表明,制备的光催化剂具有典型的中孔结构,孔径为3-6 nm。通过在可见光照射下在水溶液中光催化还原Cd(II)来评估所制备的光催化剂的光催化活性。结果表明,在中性水溶液中照射2.5h后,添加最佳PEG的多孔N掺杂TiO2的Cd(II)还原率最高,为85.1%。所制备的光催化剂的光催化活性的显著提高主要归因于N掺杂和多孔结构的协同结合,这可以积极增加该光催化剂的催化活性位点。版权所有©2021作者所有,BCREC集团出版。这是CC BY-SA许可证下的开放访问文章(https://creativecommons.org/licenses/by-sa/4.0)。
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Synthesis of Porous N-doped TiO2 by Using Peroxo Sol-Gel Method for Photocatalytic Reduction of Cd(II)
Porous N-doped TiO2 photocatalyst was successfully synthesized by an environmentally friendly peroxo sol-gel method using polyethylene glycol (PEG) as a templating agent. Here, the effect of PEG addition to the aqueous peroxotitanium solutions on the structure, pore properties and photocatalytic activity of the obtained photocatalysts was systematically studied. The prepared photocatalysts were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), and Brunauer-Emmett-Teller (BET). It was found that the doping of nitrogen narrows the band gap of TiO2 leading to enhance its visible-light response. The BET analysis shows that the prepared photocatalysts have a typical mesoporous structure with pore sizes of 3–6 nm. The photocatalytic activity of the prepared photocatalysts was evaluated by photocatalytic reduction of Cd(II) in an aqueous solution under visible light irradiation. The results show that porous N-doped TiO2 with the optimal PEG addition had the highest Cd(II) reduction of 85.1% after 2.5 h irradiation in neutral aqueous solution. This significant improvement in photocatalytic activity of the prepared photocatalysts was mainly attributed to the synergistic combination of N doping and porous structure, which could actively increase the catalytic active site of this photocatalysts. Copyright © 2021 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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来源期刊
CiteScore
3.20
自引率
6.70%
发文量
52
审稿时长
12 weeks
期刊介绍: Bulletin of Chemical Reaction Engineering & Catalysis, a reputable international journal, provides a forum for publishing the novel technologies related to the catalyst, catalysis, chemical reactor, kinetics, and chemical reaction engineering. Scientific articles dealing with the following topics in chemical reaction engineering, catalysis science and engineering, catalyst preparation method and characterization, novel innovation of chemical reactor, kinetic studies, etc. are particularly welcome. However, articles concerned on general chemical engineering process are not covered and out of scope of this journal
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