Metal–Organic Framework-Templated Synthesis of In2S3/CoSx Nanocages for Photocatalytic Removal of Antibiotics

光催化 纳米笼 材料科学 金属有机骨架 化学工程 纳米技术 光化学 催化作用 化学 物理化学 有机化学 吸附 工程类
作者
Jiajun Li,Wei Li,Zhifei Liu,Pengfei Fang,Rui Xiong,Jianhong Wei
出处
期刊:ACS applied nano materials [American Chemical Society]
卷期号:6 (18): 16927-16937 被引量:7
标识
DOI:10.1021/acsanm.3c03085
摘要

Rational design of a hierarchical core–shell structured photocatalyst is crucial for enhancing the separation and transport efficiency of photogenerated carriers, thereby improving the photocatalytic degradation efficiency. In this study, hollow polyhedral CoSx was first synthesized by utilizing dodecahedral Co-based metal–organic framework (ZIF-67) as a Co source and template, followed by introducing In and S species to fabricate hierarchical core–shell In2S3/CoSx composites. The resulting In2S3/CoSx porous hollow heterostructured composites exhibited an accelerated interfacial carrier transfer ratio and enhanced photocatalytic removal performance of tetracycline hydrochloride (TCH). Among them, the optimized sample In2S3/CoSx-2 (CoIS-2) demonstrated the highest TCH removal rate of 0.0324 min–1, which was 22.8 times higher than that of pristine CoSx and 5.7 times higher than that of pure In2S3, respectively. Moreover, its apparent quantum efficiency reached 4.66% at 420 nm. Electron spin resonance analysis and active substance capture experiments confirmed that superoxide radical (•O2–) played a predominant role in the reaction system. Furthermore, we investigated the dynamics of photoinduced carriers through a series of photoelectric tests combined with density functional theory calculations. This study provides valuable insights into controllable construction of metal–organic framework-based materials with high photocatalytic degradation efficiency and stability.
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