Generating a captivating S-scheme CuBi2O4/CoV2O6 heterojunction with boosted charge spatial separation for efficiently removing tetracycline antibiotic from wastewater

异质结 光催化 材料科学 降级(电信) 纳米颗粒 基质(水族馆) 载流子 化学工程 纳米技术 化学 光电子学 催化作用 有机化学 地质学 工程类 海洋学 电信 计算机科学
作者
Jin Luo,Xunfu Zhou,Fei Yang,Xiaomei Ning,Liang Zhan,Zhijun Wu,Xiaosong Zhou
出处
期刊:Journal of Cleaner Production [Elsevier BV]
卷期号:357: 131992-131992 被引量:150
标识
DOI:10.1016/j.jclepro.2022.131992
摘要

In this work, a captivating S-scheme CuBi2O4/CoV2O6 heterojunction was innovatively constructed by in situ growing CoV2O6 nanoparticles on the surface of CuBi2O4 microrods. Of note, the unique CuBi2O4 microrods served as an outstanding substrate to achieve the uniform loading of CoV2O6 nanoparticles. Compared with neat CoV2O6 and CuBi2O4, as expected, the resulting CuBi2O4/CoV2O6 illustrated significantly boosted photocatalytic efficiency for degrading tetracycline (TC) under visible light illumination. More impressively, the optimized CuBi2O4(30 wt%)/CoV2O6 manifested the best TC removal rate of 0.01328 min−1 after 120 min of reaction, which was roughly 33.2 and 14.4 times larger than those of neat CoV2O6 and CuBi2O4, separately. Such an exceptional photocatalytic activity was mainly ascribed to the expedited the charge spatial detachment and transport, and synchronously reserved the strong redox ability driven by the established S-scheme heterojunction between CoV2O6 and CuBi2O4. Moreover, the reactive species scavenging tests and electron spin resonance analysis substantiated that the superoxide radicals combined with photogenerated holes were unquestionably responsible for removing TC. Eventually, the possible degradation mechanism and pathways of TC over CuBi2O4/CoV2O6 were also put forward.
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