Preparation of fly ash zeolite supported ZnO/Co3O4 catalyst for the photocatalytic degradation of xanthate under visible light

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Optical Materials Pub Date : 2024-10-13 DOI:10.1016/j.optmat.2024.116262

Junxiang Wang , Qianqian Song , Xindong Zhou , Ruoyun Li , Qingming He , Jingang Wang , Hui Yang , Haodong Duan , Lin Li

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Abstract

The development of high-value utilization technology of fly ash plays an important role in promoting environmental protection and social and economic development. In this paper, a novel composite photocatalyst Z-ZnO/Co₃O₄ is synthesized by loading ZnO/Co₃O₄ on the surface of fly ash zeolite. In addition, the properties of Z-ZnO/Co₃O₄ are characterized by variety of methods. The results show that the surface of cubic A-type zeolite is coated with ZnO/Co₃O₄ composite, forming an open spherical flower-like structure with a typical p-n heterostructure, which plays a positive role in reducing the band gap and the recombination rate of photogenerated electrons and holes of the composite catalyst, thus improving the degradation efficiency of xanthate. The degradation rate toward xanthate of Z-ZnO/Co₃O₄ is 97.62 % after simulated sunlight irradiation for 120 min under the optimum conditions, which is higher than that of Z-ZnO and Z-Co₃O₄, respectively. Meanwhile, the experimental results indicate that h⁺ plays a leading role in the catalytic reaction system. Furthermore, degradation rate toward xanthate of Z-ZnO/Co₃O₄ decreases slightly from 97.62 % to 88.24 % after five cycles, indicating its remarkable durability and stability.

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制备粉煤灰沸石支撑的 ZnO/Co3O4 催化剂，用于在可见光下光催化降解黄原酸盐

粉煤灰高值化利用技术的开发对促进环境保护和社会经济发展具有重要作用。本文通过在粉煤灰沸石表面负载 ZnO/Co3O4 合成了一种新型复合光催化剂 Z-ZnO/Co3O4。此外，还采用多种方法对 Z-ZnO/Co3O4 的性质进行了表征。结果表明，立方A型沸石表面包覆ZnO/Co3O4复合材料后，形成了开放的球花状结构，具有典型的p-n异质结构，这对降低复合催化剂的带隙和光生电子与空穴的重组率起到了积极作用，从而提高了黄原酸盐的降解效率。在最佳条件下，Z-ZnO/Co3O4在模拟太阳光照射120分钟后对黄原酸盐的降解率为97.62%，分别高于Z-ZnO和Z-Co3O4。同时，实验结果表明，h+ 在催化反应体系中起主导作用。此外，Z-ZnO/Co3O4 对黄原酸盐的降解率在五个循环后从 97.62% 微降至 88.24%，表明其具有显著的耐久性和稳定性。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.