文献类型：期刊文献

英文题名：Dynamic defects boost in- situ H2O2 piezocatalysis for water cleanup

作者：Ran, Maoxi[1,2,3,4];Du, Bibai[2];Liu, Wenyuan[1];Liang, Zhiyan[1];Liang, Lihong[1];Zhang, Yayun[5];Zeng, Lixi[2];Xing, Mingyang[1,3,4]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat & Joint Int Res Lab Precis Chem Mo, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn,Feringa Nobel Prize Scientist, Shanghai 200237, Peoples R China;[2]Jinan Univ, Sch Environm, Guangdong Key Lab Environm Pollut & Hlth, Guangzhou 511443, Peoples R China;[3]East China Univ Sci & Technol, Sch Resources & Environm Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Inst Fine Chem, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：121

期号：9

外文期刊名：PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001206031400002)】；

基金：ACKNOWLEDGMENTS. This work was supported by the National Natural Science Foundation of China (No. 22325602, 22276071, 52000101, 22176060, and 22076064) and sponsored by Program of Shanghai Academic/Technology Research Leader (23XD1421000) . Project supported by Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03) , the Program of Introducing Talents of Discipline to Universities (B16017) , and the Science and Technology Commission of Shanghai Municipality (20DZ2250400) . Authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：H2O2 in-situ generation; dynamic defects; O-2 activation; piezocatalytic performance; water remediation

摘要：Creating efficient catalysts for simultaneous H2O2 generation and pollutant degradation is vital. Piezocatalytic H2O2 synthesis offers a promising alternative to traditional methods but faces challenges like sacrificial reagents, harsh conditions, and low activity. In this study, we introduce a cobalt- loaded ZnO (CZO) piezocatalyst that efficiently generates H2O2 from H2O and O-2 under ultrasonic (US) treatment in ambient aqueous conditions. The catalyst demonstrates exceptional performance with similar to 50.9% TOC removal of phenol and in situ generation of 1.3 mM H2O2 , significantly outperforming pure ZnO. Notably, the CZO piezocatalyst maintains its H2O2 generation capability even after multiple cycles, showing continuous improvement (from 1.3 mM to 1.8 mM). This is attributed to the piezoelectric electrons promoting the generation of dynamic defects under US conditions, which in turn promotes the adsorption and activation of oxygen, thereby facilitating efficient H2O2 production, as confirmed by EPR spectrometry, XPS analysis, and DFT calculations. Moreover, the CZO piezocatalysts maintain outstanding performance in pollutant degradation and H2O2 production even after long periods of inactivity, and the deactivated catalyst due to metal ion dissolution could be rejuvenated by pH adjustment, offering a sustainable solution for wastewater purification.