Synergetic catalysis enhancement between H2O2 and TiO2 with single-electron-trapped oxygen vacancy

查看全文 作　　者：Zhijiao [1]Wu;Kai [1,4]Guo;Shuang [1]Cao;Wenqing [3]Yao;Lingyu [1,2]Piao

机构地区：[1]CAS Key Laboratory of Standardization and Measurement for Nanotechnolog,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China;[2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;[3]Department of Chemnistry,Tsinghua University,Beijing 100084,China;[4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》索引2020年第13卷第2期,共6页

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.21703046 and 21972028);the Ministry of Science and Technology of China(No.2016YFF0203803). 摘　　要：The TiO2-H2O2 system possesses excellent oxidation activity even under dark conditions.However,the mechanism of this process is unclear and inconsistent.In this work,the binary component system containing TiO2 nanoparticles(NPs)with single electron-trapped oxygen vacancy(SETOV,Vo-)and H2O2 exhibit excellent oxidative performance for tetracycline,RhB,and MO even without light irradiation.We systematically investigated the mechanism for the high activity of the TiO2-H2O2 under dark condition Reactive oxygen species(ROS)induced from H2O2 play a significant role in improving the catalytic degradation activities.X-ray photoelectron spectroscopy(XPS)and electron paramagnetic resonance(EPR)results firstly confirm that H2O2 is primarily activated by SETOVs derived from the TiO2 NPs through direct contribution of electrons,producing both.O2^-/·OOH and.OH,which are responsible for the excellent reactivity of TiO2-H2O2 system.This work not only provides a new perspective on the role of SETOVs playing in the H202 activation process,but also expands the application of TiOz in environmental conservation. 关键词：single-electron-trapped oxygen vacancy TiO2 nanoparticle H2O2 dark reaction superoxide radicals hydroxyl radicai

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Synergetic catalysis enhancement between H2O2 and TiO2 with single-electron-trapped oxygen vacancy

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