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	The p-n heterojunction-engineered Bi2MoO6/KNbO3 with 2D/3D architecture for enhanced photocatalytic activity towards benzene-containing contaminants under visible light illumination
	Liu, Chen1; He, Xi1,2,3; Fan, Yuhan1; Li, Jun1; He, Xinxia1; Chen, Ming1,4,5
	2022-10-01
摘要	It is extremely challenging for multi-targeted removal of benzene-containing contaminants (BCCs) due to their complex structure. Here, we successfully fabricate a novel two-dimensional (2D)/three-dimensional (3D) Bi2MoO6/KNbO3-3 (the molar ratio of Bi2MoO6 to KNbO3 is controlled at 1:3) p-n heterojunction through in-situ growth method, which can effectively degrade both typical BCCs: rhodamine B (RhB, 91.3% in 60 min) and oxytetracycline hydrochloride (OTC-HCl, 80.7% in 90 min). Bi2MoO6/KNbO3-3 exhibits great stability after four cycles with low metal ions leaching (< 0.34 ppm). The possible degradation pathways of typical BCC are proposed with the combination of N-de-ethylation, chromophore cleavage and mineralization, 14 intermediates are clarified. Three-dimensional excitation-emission matrix fluorescence spectra (3D EEMs) are conducted to grasp the overall change of OTC-HCl. Moreover, Bi2MoO6/KNbO3-3 can simultaneously degrade coexisted BCCs (RhB, malachite green and methylene blue) in real surface water under visible light illumination with the removal rates of 85.8%, 97.7% and 97.7%, respectively. This work provides a novel strategy for multi-targeted removal of BCCs in real surface water, and demonstrates that the structure of 2D/3D p-n heterojunction can effectively limit the leaching of metal ions which will avoid the potential secondary pollution.
关键词	Multi-targeted removal Benzene-containing contaminants 2D/3D p-n heterojunction Photocatalytic Visible light
DOI	10.1016/j.jece.2022.108302
发表期刊	JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
ISSN	2213-2929
卷号	10期号:5页码:13
通讯作者	Chen, Ming(chenming@cigit.ac.cn)
收录类别	SCI
WOS记录号	WOS:000841959700001
语种	英语