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Solar light-driven 2D MoS2 nanoflake-supported 1D ZnWO4 nanorod heterostructure: Efficient separation of charge carriers for removing toxic organic pollutants
Journal of Environmental Chemical Engineering ( IF 7.4 ) Pub Date : 2021-09-21 , DOI: 10.1016/j.jece.2021.106427
Raju Atla 1 , Tae Hwan Oh 1
Affiliation  

In this study, a novel photocatalyst for efficiently eliminating toxic and harmful antibiotics from water bodies was prepared successfully. Precisely, MoS2/ZnWO4 (MSZW) heterostructures were prepared using a facile hydrothermal technique. The constructed samples were characterized by using structural, morphological, diffuse reflectance spectroscopy, and photoluminescence measurements. The efficiencies of the catalysts were investigated using the removal of tetracycline (TC) antibiotic under stimulated solar light irradiation. Among the prepared photocatalysts, the optimal MSZW-10 heterostructure displayed superior photocatalytic performance and degrade ~97.40% of TC within 105 min. Moreover, the photocatalytic performance of MSZW-10 is approximately ~6.18 and ~10.77 times greater over pure MoS2 and ZnWO4, respectively. The progress in the photocatalytic performance chiefly owing to its improved partition of charge carriers, the robust positive synergistic effect of suitable positions of energy levels, improved light absorption ability, and enhanced interfacial charge transfer between MoS2 and ZnWO4. The MoS2/ZnWO4 composite exhibits significantly enhanced photocatalytic performance as well as excellent reusability performance, thus indicating its applicability in wastewater treatment.



中文翻译:

太阳能光驱动的二维 MoS2 纳米薄片支撑的一维 ZnWO4 纳米棒异质结构:有效分离电荷载体以去除有毒有机污染物

本研究成功制备了一种新型光催化剂,可有效去除水体中的有毒有害抗生素。准确地说,MoS 2 /ZnWO 4(MSZW) 异质结构是使用简便的水热技术制备的。通过使用结构、形态、漫反射光谱和光致发光测量来表征构建的样品。通过在受激太阳光照射下去除四环素 (TC) 抗生素来研究催化剂的效率。在制备的光催化剂中,最佳的 MSZW-10 异质结构显示出优异的光催化性能,并在 105 分钟内降解约 97.40% 的 TC。此外,MSZW-10 的光催化性能是纯 MoS 2和 ZnWO 4 的约 6.18 倍和 10.77 倍, 分别。光催化性能的进步主要归功于其改进的电荷载流子分配、合适能级位置的强大正协同效应、改进的光吸收能力以及增强的 MoS 2和 ZnWO 4之间的界面电荷转移。MoS 2 /ZnWO 4复合材料表现出显着增强的光催化性能以及优异的重复使用性能,从而表明其在废水处理中的适用性。

更新日期:2021-09-27
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