CuO与Bi3NbO7复合提高可见光下光催化性能

IF 3.2 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Lei Yang, Yanming Shen, Yinyan Dou, Junhua Wen
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引用次数: 0

摘要

本文设计并成功制备了CuO/Bi3NbO7 p-n异质结光催化剂,克服了光生载流子复合率高、光吸收范围有限等问题。采用XRD、SEM、TEM、UV-vis DRS、BET、电化学等方法对样品进行了表征。研究了MB的可见光降解性能。讨论了CuO复合比、MB初始浓度、催化剂添加量和pH对催化活性的影响。实验结果表明,CuO纳米颗粒成功负载在Bi3NbO7上,复合催化剂表现出疏松多孔的形貌。CuO的结合不仅提高了Bi3NbO7对可见光的吸收能力,而且促进了光生电子和空穴的转移,提高了Bi3NbO7的光催化活性。在优化后的实验条件下,可见光照射180 min后,MB和TC对CuO/Bi3NbO7复合材料的降解效率分别达到96%和99%,均高于散装Bi3NbO7。这种p-n异质结促进了光生电荷的分离。为提高Bi3NbO7的光催化活性提供了参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Combination of CuO with Bi3NbO7 for Boosting Photocatalytic Performance Under Visible Light

In this work, CuO/Bi3NbO7 p–n heterojunction photocatalyst was designed and successfully prepared, in order to overcome the problems, such as high recombination rate of photo-generated carriers, limited light absorption range and so on. The resulted samples were characterized by techniques, such as XRD, SEM, TEM, UV–vis DRS, BET, electrochemical test. The visible light degradation performance for MB was investigated. The effects of CuO composite ratio, initial MB concentration, catalyst addition amount and pH on the catalytic activity were discussed. The experimental results showed that CuO nanoparticles were successfully loaded on Bi3NbO7, and the composite catalyst exhibited a loose and porous morphology. The combination of CuO not only improved the absorption capacity for visible light, but also promoted the transfer of photo-generated electrons and holes, and improved the photocatalytic activity of Bi3NbO7. Under the optimized experimental conditions, after visible light irradiation for 180 min, the degradation efficiencies of MB and TC on CuO/Bi3NbO7 composite with 5 wt % CuO loading reached 96% and 99%, respectively, which were higher than that of bulk Bi3NbO7. This p–n heterojunction promoted the separation of photo-generated charges. It provides a reference for improving the photocatalytic activity of Bi3NbO7.

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来源期刊
Korean Journal of Chemical Engineering
Korean Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
4.60
自引率
11.10%
发文量
310
审稿时长
4.7 months
期刊介绍: The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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