标题:Enhanced piezoelectric-induced catalysis of SrTiO3 nanocrystal with well-defined facets under ultrasonic vibration
作者:Ling, Jiasen; Wang, Kai; Wang, Zeyan; Huang, Haitao; Zhang, Gaoke
作者机构:[Ling, Jiasen; Wang, Kai; Zhang, Gaoke] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Hubei Key Lab Mineral Resources Proc & Environm, 更多
通讯作者:Zhang, GK
通讯作者地址:[Zhang, GK]Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Hubei Key Lab Mineral Resources Proc & Environm, 122 Luoshi Rd, Wuhan 430070, 更多
来源:ULTRASONICS SONOCHEMISTRY
出版年:2020
卷:61
DOI:10.1016/j.ultsonch.2019.104819
关键词:Piezoelectric-catalytic; SrTiO3 nanocrystal; Facet engineering; Surface; heterojunction; Ultrasonic vibration
摘要:Facet engineering of nanocomposite has been confirmed to be an efficient strategy to accelerate their catalytic performances, but to improve their piezoelectric catalytic activities by facet engineering has been seldom reported. Herein, we developed a series of SrTiO3 nanocrystals with exposed {0 0 1} facet, dominant {1 1 0} facet and co-exposed {0 0 1} and {1 1 0} facets, respectively, and firstly revealed its piezoelectric catalytic performance under ultrasonic vibration. Moreover, the relationship between piezoelectric-induced catalytic activity and facet-dependence of SrTiO3 nanocrystal was disclosed for the first time. The SrTiO3 nanocrystal with co-exposed {0 0 1} and {1 1 0} facets exhibited effectively enhanced piezoelectric catalytic activity by degrading Rhodamine B (RhB) under ultrasonic vibration, as compared to that of SrTiO3 nanocrystals with exposed {0 0 1} facet and dominant {1 1 0} facet, respectively. In addition, trapping experiments and active species quantitative experiments confirmed that the co-exposed {0 0 1} and {1 1 0} facets were beneficial to produce center dot O-2 and center dot OH with the generation rates of 8.3 and 132.2 mu mol g(-1) h(-1), respectively. The center dot OH radical played a dominant role in piezoelectric catalytic process. Finally, the piezoelectric catalysis mechanism of SrTiO3 surface heterojunction was proposed based on a DFT study. This study presents an in-depth understanding of piezoelectric-induced catalytic of perovskite nanocrystals with exposed well-defined facets.
收录类别:SCOPUS;SCIE
Scopus被引频次:2
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85073744829&doi=10.1016%2fj.ultsonch.2019.104819&partnerID=40&md5=cbde8d78f52ebedd573419998a8dc921
TOP