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具有增强光催化活性用于降解四环素的可见光驱动CQDs@MIL-125(Ti)纳米复合光催化剂。

Visible-light-driven CQDs@MIL-125(Ti) nanocomposite photocatalyst with enhanced photocatalytic activity for the degradation of tetracycline.

作者信息

Li Zhi, Che Guangbo, Jiang Wei, Liu Lihui, Wang Hairui

机构信息

Key Laboratory of Preparation and Application of Environmental Friendly Materials (Jilin Normal University), Ministry of Education Changchun 130103 People's Republic of China

出版信息

RSC Adv. 2019 Oct 16;9(57):33238-33245. doi: 10.1039/c9ra05600a. eCollection 2019 Oct 15.

DOI:10.1039/c9ra05600a
PMID:35529147
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9073379/
Abstract

In the present study, a novel photocatalyst, CQDs@MIL-125(Ti) (CQDs = carbon quantum dots), was prepared a solvothermal procedure. The photocatalytic properties were tested by the degradation of tetracycline (TC) with a 250 W Xe lamp ( > 420 nm). Compared with pure MIL-125(Ti), the 10 wt% CQDs@MIL-125(Ti) photocatalyst can significantly improve the degradation process of TC, and the degradation efficiency can reach 90% within 4 h. The enhancement in the photocatalytic performance is due to the CQDs, which can promote the absorption of visible light and also efficiently accelerate the separation of photogenerated electron-hole pairs. We have also demonstrated that superoxide radicals (·O ) and holes (h) play crucial roles in the photocatalytic degradation of TC through capture experiments. The current work provides a new idea for constructing high-efficiency photocatalysts based on MIL-125(Ti).

摘要

在本研究中，通过溶剂热法制备了一种新型光催化剂CQDs@MIL-125(Ti)（CQDs = 碳量子点）。用250 W Xe灯（> 420 nm）降解四环素（TC）来测试其光催化性能。与纯MIL-125(Ti)相比，10 wt%的CQDs@MIL-125(Ti)光催化剂能显著改善TC的降解过程，且在4小时内降解效率可达90%。光催化性能的增强归因于碳量子点，其能促进可见光吸收并有效加速光生电子 - 空穴对的分离。我们还通过捕获实验证明了超氧自由基（·O ）和空穴（h）在TC的光催化降解中起关键作用。目前的工作为构建基于MIL-125(Ti)的高效光催化剂提供了新思路。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae98/9073379/5970aadc85d1/c9ra05600a-f13.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae98/9073379/096ebada4d18/c9ra05600a-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae98/9073379/7b4571f25e5e/c9ra05600a-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae98/9073379/421847c91fe6/c9ra05600a-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ae98/9073379/67d0ea4f0775/c9ra05600a-f10.jpg
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