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异质结构BiS@NH-MIL-125(Ti)纳米复合材料作为一种双功能光催化剂，用于可见光下Cr(VI)还原和罗丹明B降解。

Heterostructured BiS@NH-MIL-125(Ti) nanocomposite as a bifunctional photocatalyst for Cr(vi) reduction and rhodamine B degradation under visible light.

作者信息

Wang Minghua, Yang Longyu, Yuan Jinyun, He Linghao, Song Yingpan, Zhang Hongzhong, Zhang Zhihong, Fang Shaoming

机构信息

Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration P. R. China.

Henan Provincial Key Laboratory of Surface & Interface Science, Zhengzhou University of Light Industry Zhengzhou 450001 P. R. China

出版信息

RSC Adv. 2018 Apr 3;8(22):12459-12470. doi: 10.1039/c8ra00882e. eCollection 2018 Mar 26.

DOI:10.1039/c8ra00882e
PMID:35539393
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9079623/
Abstract

A series of bismuth sulfide (BiS) nanorods and amine-functionalized Ti-based metal-organic framework heterojunctions [denoted by BiS@NH-MIL-125(Ti)] were constructed and explored as bifunctional photocatalysts for Cr(vi) reduction and rhodamine B (RhB) degradation under visible light illumination. Compared with the individual NH-MIL-125(Ti) and BiS, the as-synthesized BiS@NH-MIL-125(Ti) photocatalyst exhibited an enhanced photocatalytic activity toward Cr(vi) and RhB owning to the synergetic effect between BiS and NH-MIL-125(Ti). Moreover, the BiS@NH-MIL-125(Ti) heterojunctions showed increased Cr(vi) removal efficiency by adding RhB in the system. The photocatalytic mechanism was proposed based on the analysis of different scavenger for active species and electron spin resonance spectrometry. The introduction of BiS into NH-MIL-125(Ti) can extend the light adsorption and improve the transfer and separation of photogenerated charge carriers through the BiS@NH-MIL-125(Ti) heterojunction with unique band gap structure. The synthesized BiS@NH-MIL-125(Ti) photocatalyst also exhibited good reusability and stability.

摘要

构建了一系列硫化铋（BiS）纳米棒与胺功能化钛基金属有机框架异质结[记为BiS@NH-MIL-125(Ti)]，并将其作为双功能光催化剂用于可见光照射下Cr(Ⅵ)的还原和罗丹明B（RhB）的降解。与单独的NH-MIL-125(Ti)和BiS相比，所合成的BiS@NH-MIL-125(Ti)光催化剂由于BiS与NH-MIL-125(Ti)之间的协同效应，对Cr(Ⅵ)和RhB表现出增强的光催化活性。此外，BiS@NH-MIL-125(Ti)异质结在体系中加入RhB后显示出提高的Cr(Ⅵ)去除效率。基于对活性物种的不同清除剂分析和电子自旋共振光谱提出了光催化机理。将BiS引入NH-MIL-125(Ti)可以通过具有独特带隙结构的BiS@NH-MIL-125(Ti)异质结扩展光吸收并改善光生电荷载流子的转移和分离。所合成的BiS@NH-MIL-125(Ti)光催化剂还表现出良好的可重复使用性和稳定性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/c4d9e7d33843/c8ra00882e-f10.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/c04aee5b6e9b/c8ra00882e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/c4d9e7d33843/c8ra00882e-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/b8cd9e88299a/c8ra00882e-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/0b0139198053/c8ra00882e-f2.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/d20e3ca6cc88/c8ra00882e-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/b2c09bf18226/c8ra00882e-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/f412a2e98979/c8ra00882e-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/f7305f69d0c2/c8ra00882e-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/c04aee5b6e9b/c8ra00882e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/89bb/9079623/c4d9e7d33843/c8ra00882e-f10.jpg

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