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具有增强类光芬顿催化剂性能的花状MoS/FeO/rGO复合材料的构建

Construction of flower-like MoS/FeO/rGO composite with enhanced photo-Fenton like catalyst performance.

作者信息

Mu Dongzhao, Chen Zhe, Shi Hongfei, Tan Naidi

机构信息

School of Science, Jilin Institute of Chemical Technology Jilin 132022 PR China

出版信息

RSC Adv. 2018 Oct 30;8(64):36625-36631. doi: 10.1039/c8ra06537c. eCollection 2018 Oct 26.

DOI:10.1039/c8ra06537c
PMID:35558923
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9088837/
Abstract

High-performance and recyclable photocatalysts have attracted considerable amounts of attention for use in wastewater treatment. In this paper, a MoS/FeO/rGO (0.1 wt%) composite was synthesized by an environmentally-friendly and facile strategy, and showed high potential for recyclability. The nanocomposite exhibited high photocatalytic activity in the presence of HO and rGO (reduced graphene oxide) under visible-light irradiation. Notably, when 3 mg of MoS/FeO/rGO (0.1 wt%) was added to rhodamine B (RhB, 30 mg L) solution, the degradation rate was almost 100% within 40 min at neutral pH under visible-light irradiation. This rate was four times more rapid than that of MoS and double that of MoS/FeO. The results indicate that rGO plays an important role in photocatalysis by suppressing the recombination of photogenerated electron-hole pairs and enhancing the absorption capability of visible-light and organic dyes. Finally, the photocatalytic and stability mechanisms of MoS/FeO/rGO (0.1 wt%) are proposed. This work further helps our understanding of the photo-Fenton mechanism. Furthermore, the synthesis of this composite has potential for application in energy storage devices.

摘要

高性能且可循环使用的光催化剂在废水处理中的应用已引起了广泛关注。本文采用一种环境友好且简便的策略合成了MoS/FeO/rGO（0.1 wt%）复合材料，并显示出较高的可循环利用潜力。该纳米复合材料在可见光照射下，于HO和rGO（还原氧化石墨烯）存在的情况下表现出高光催化活性。值得注意的是，当向罗丹明B（RhB，30 mg L）溶液中添加3 mg的MoS/FeO/rGO（0.1 wt%）时，在可见光照射下，中性pH条件下40分钟内降解率几乎达到100%。该速率比MoS快四倍，比MoS/FeO快两倍。结果表明，rGO通过抑制光生电子 - 空穴对的复合以及增强对可见光和有机染料的吸收能力，在光催化中发挥着重要作用。最后，提出了MoS/FeO/rGO（0.1 wt%）的光催化和稳定性机制。这项工作进一步有助于我们理解光芬顿机制。此外，这种复合材料的合成在能量存储装置中具有潜在的应用前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e63a/9088837/1ca3d63ced82/c8ra06537c-f10.jpg
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