Synergistic catalysis of BiOIO3 catalyst for elimination of organic pollutants under simultaneous photo-irradiation and ultrasound-vibration treatment

被引:52
作者
Chen, Jiayao [1 ]
Lei, Hua [1 ]
Ji, Shilong [1 ]
Wu, Meixuan [1 ]
Zhou, Baocheng [1 ]
Dong, Xiaoping [1 ]
机构
[1] Zhejiang Sci Tech Univ, Dept Chem, Key Lab Surface & Interface Sci Polymer Mat Zheji, Hangzhou 310018, Peoples R China
关键词
Photopiezocatalysis; Synergistic catalysis; BiOIO3; Degradation; Dyes; Dichlorophenol; CARBON NITRIDE NANOSHEETS; WASTE-WATER; PHOTOCATALYSTS; DEGRADATION; PERFORMANCE; NANORODS; REMOVAL;
D O I
10.1016/j.jcis.2021.05.151
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Development of efficiently catalytic strategy for oxidative purification of organic pollutants is of great significance. Photocatalysis has become one of the most important technologies in the past half a century, but the inefficiency of photocatalysts drastically suppresses its practical application. This work proposes a synergistic photopiezocatalysis of BiOIO3 under simultaneous photo-irradiation and ultrasound-vibration treatment to degrade various organic pollutants. Different from the high recombination of photo-excited charges in photocatalysis, the ultrasound-induced stress deforms the pyroelectric BiOIO3 to form a piezoelectric potential that drives photo-/thermo-generated free electrons and holes in catalyst to diffuse along opposite directions. In comparison with the single photocatalysis and piezocatalysis, the photopiezocatalysis possesses a synergistic effect, presenting evidently enhanced catalytic performance for decomposing a variety of organic dyes and a persistent organic pollutant 2,4-DCP. No apparent decrease in activity during successive five runs demonstrates that the photopiezocatalysis of BiOIO3 has a high stability and reusability. Finally, a plausible photopiezocatalysis mechanism is proposed based on the determination of active species produced on catalyst and intermediates during pollutant degradation. Our findings provide a new insight to promote charge separation and meanwhile develop an efficient synergistic photopiezocatalysis for environment remediation. (C) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码:704 / 713
页数:10
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