Embedding Co in Perovskite Moo3 For Superior Catalytic Oxidation of Refractory Organic Pollutants with Peroxymonosulfate: Role Of Co(Ii)/Co(Iii) Cycle

作     者：Zeng, Qingyi Tan, Jing Gao, Beibei Cai, Tao Zhang, Qingyan Liu, Yilin Chang, Sheng Zhao, Shuaifei Wu, Suqing 

作者机构：School of Resources & Environment and Safety Engineering University of South China Hunan Hengyang421001 China College of Mechanical Engineering University of South China Hunan Hengyang421001 China School of Energy & Power Engineering Nanjing University of Aeronaut & Astronaut Jiangsu Nanjing210016 China  VIC3216 Australia National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution Key Laboratory of Zhejiang Province for Water Environment and Marine Biological Resources Protection College of Life and Environmental Science Wenzhou University Wenzhou325000 China 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Organic pollutants 

摘      要：A cobalt(Co)-doped perovskite molybdenum trioxide (α-MoO 3 ) catalyst (Co-MO) was synthesized by a facile pyrolysis strategy and used for degrading various organic contaminants via peroxymonosulfate (PMS) activation. The doped Co was inserted in the inter space between the octahedron [MoO 6 ], facilitating the growth of the α-MoO 3 crystal on the [010] direction. This unique structure accelerated the activation of PMS by triggering the Co(II)/Co(III) cycle while the Co-MO functioned as an carrier for electron transfer in the Co-MO/PMS system. As a result, the Co-MO/PMS system showed noticeable activity for removing 100% bisphenol A (BPA) under a broad conditions within 30 min. The radical quenching test and electron paramagnetic resonance analysis revealed that singlet oxygen ( 1 O 2 ) was the main active species for BPA degradation in the Co-MO/PMS system, while free radicals, such as O 2 •- , SO 4 •- and •OH, were also produced as the intermediate species. The excellent adaptability of the Co-MO/PMS system was further demonstrated by its high stability, low leaching of metal ions, well function in various water matrices, and high activity in degrading various refractory organic pollutants. Our findings pave a useful avenue for the rational design of novel cobalt-doped catalysts with high catalytic performance toward wide environmental applications. © 2022, The Authors. All rights reserved.