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Recent developments and challenges in zeolite-based composite photocatalysts for environmental applications
Chemical Engineering Journal ( IF 15.1 ) Pub Date : 2021-03-04 , DOI: 10.1016/j.cej.2021.129209
Guang Hu , Jian Yang , Xu Duan , Ramin Farnood , Chen Yang , Jie Yang , Weizao Liu , Qingcai Liu

Aluminosilicate zeolites have been found to be effective supports of semiconductor photocatalysts for the removal of organic compounds in wastewater and air. In this review, we summarize the progress in the application of zeolite materials such as Y, ZSM-5, mordenite, beta and clinoptilolite for improving the performance of semiconductor photocatalysts in degradation of environmental pollutants. The main synthesis strategies and the mechanisms of organic compounds adsorption and photocatalysis by zeolite-based photocatalysts are explicated in detail. Meanwhile, various types of zeolite-based photocatalytic composites are also thoroughly summarized. The more reliable zeolite-based photocatalysts with high photocatalytic activity under visible or sunlight irradiation should be extensively investigated. Additionally, we highlight the advancements for improving performance of different zeolite-based composites in photocatalytic degradation organic contaminants in wastewater and air. The achieved progress demonstrates that the photocatalytic enhancement of zeolite-based composites is predominantly dependent on the enhanced adsorption performance, as well as the high separation and transfer efficiency of photogenerated charge carriers. Hence, the characteristics of the zeolite-based composites (surface area, pHpzc value, hydrophobic, band gap and band edge), the nature of organic contaminants and other experiment factors need to be taken into account in applying to photodegradation process involving this catalyst. Finally, the current challenges and perspectives for the future research of these photocatalysts are presented.



中文翻译:

用于环境的沸石基复合光催化剂的最新发展和挑战

已经发现铝硅酸盐沸石是半导体光催化剂的有效载体,用于去除废水和空气中的有机化合物。在这篇综述中,我们总结了Y型,ZSM-5型,丝光沸石,β型和斜发沸石等沸石材料在改善半导体光催化剂降解环境污染物性能方面的应用进展。详细阐述了沸石基光催化剂对有机化合物吸附和光催化的主要合成策略和机理。同时,也全面总结了各种类型的沸石基光催化复合材料。在可见光或日光照射下,具有高光催化活性的更可靠的沸石基光催化剂应进行广泛研究。此外,我们重点介绍了改善沸石基复合材料在废水和空气中光催化降解有机污染物中的性能方面的进展。所取得的进展表明,沸石基复合材料的光催化增强作用主要取决于增强的吸附性能以及光生电荷载体的高分离和转移效率。因此,将沸石基复合材料的特性(表面积,pHpzc值,疏水性,能带隙和能带边缘),有机污染物的性质和其他实验因素考虑在内,才能应用于涉及该催化剂的光降解过程。最后,介绍了这些光催化剂的当前挑战和未来研究的前景。

更新日期:2021-03-04
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