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一种用于去除阳离子染料的高效硫化铟光催化剂的简便合成方法及尺寸依赖性光催化性能

A facile synthesis of highly efficient InS photocatalysts for the removal of cationic dyes with size-dependent photocatalysis.

作者信息

Zheng Chaofan, Wang Ziyao, Yuan Jialong, Xu Qingfeng, Li Haixin, Lu Xiaoyi, Gao Jiangang, Yue Wenjin

机构信息

School of Chemical and Environmental Engineering, Anhui Polytechnic University Wuhu 241000 P.R. China

Anhui Laboratory of Clean Energy Materials and Chemistry for Sustainable Conversion of Natural Resources Wuhu 241000 P.R. China

出版信息

RSC Adv. 2023 Jan 31;13(7):4173-4181. doi: 10.1039/d2ra07108h.

DOI:10.1039/d2ra07108h
PMID:36744278
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9890568/
Abstract

In this study, a 3D thornball-like hierarchical β-InS, displaying extremely rapid photodegradation of cationic dyes, was synthesized by a facile method. The formation of a uniform thornball-like structure depended on the microwave reaction method and citric acid as the pH regulator. The size of InS was easily adjusted by changing the microwave irradiation time from 5 min to 15 min. The morphology, structure, composition, energy level, charge separation, and surface properties of different-sized InS were characterized. The results showed that InS synthesized in 10 min (InS-10) displayed optimal interface property for the electron-hole separation, maximum hydrophilia with most surface negative charges for the surface adsorption, contributing to the complete photodegradation of rhodamine B (RhB) in just 25 minutes of visible light illumination. The photodegradation path of RhB was speculated with four possible paths, including the processes of de-ethylation, open-ring of xanthene, and rupture of carbon-carbon bonds up to the decomposition into small molecules. Finally, the reusability of InS-10 was tested, obtaining nearly 96% photodegradation efficiency after sequential 5 cycles.

摘要

在本研究中，通过一种简便的方法合成了一种具有三维刺球状分级结构的β-InS，其对阳离子染料表现出极快的光降解性能。均匀刺球状结构的形成取决于微波反应方法以及作为pH调节剂的柠檬酸。通过将微波辐照时间从5分钟改变至15分钟，可以轻松调节InS的尺寸。对不同尺寸InS的形貌、结构、组成、能级、电荷分离及表面性质进行了表征。结果表明，10分钟合成的InS（InS-10）在电子-空穴分离方面表现出最佳的界面性质，具有最大的亲水性且表面带有最多的负电荷以利于表面吸附，这使得罗丹明B（RhB）在可见光照射仅25分钟内就能完全光降解。推测了RhB的光降解途径有四种可能的路径，包括脱乙基、呫吨环开环以及碳-碳键断裂直至分解为小分子的过程。最后，测试了InS-10的可重复使用性，在连续5次循环后获得了近96%的光降解效率。

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