Enhanced Performance and Conversion Pathway for Catalytic Ozonation of Methyl Mercaptan on Single-Atom Ag Deposited Three-Dimensional Ordered Mesoporous MnO2

• DOI: 10.1021/acs.est.8b03696
• Publication Date: 2018-10-26T16:48:20Z
• Authors: Dehua Xia; Wenjun Xu; Yunchen Wang; Jingling Yang; Yajing Huang; Lingling Hu; Chun He; Dong Shu; Dennis Y. C. Leung; Zhihua Pang
• Keywords: Ozone; Silver; Manganese Compounds; Metal Nanoparticles; Oxides; Sulfhydryl Compounds; 01 natural sciences; 0105 earth and related environmental sciences

In this study, Ag deposited three-dimensional MnO2 porous hollow microspheres (Ag/MnO2 PHMSs) with high dispersion of the atom level species are first prepared by a novel method redox precipitation. Due to highly efficient utilization downsized nanoparticles, optimal 0.3% Ag/MnO2 PHMSs can completely degrade 70 ppm CH3SH within 600 s, much higher than that (79%). Additionally, catalyst retains long-term stability and be regenerated its initial activity through regeneration ethanol HCl. The results characterization catalytic performance tests clearly demonstrate proper amount incorporation not only facilitates chemi-adsorption but also induces more formation vacancy oxygen (Ov) lattice (OL) in as well activation sites collectively favor ozonation CH3SH. efficiently transform into CH3SAg/CH3S-SCH3 then oxidize them SO42- CO2 evidenced situ diffuse reflectance infrared Fourier spectroscopy. Meanwhile, electron paramagnetic resonance scavenger indicate •OH 1O2 primary reactive rather surface atomic contributing removal over PHMSs. This work presents an single incorporated control air pollution.