Cu/TiO_(2)adsorbents modified by air plasma for adsorption-oxidation of H_(2)S  

作　　者：Yongqi Yan Xinyu Yang Ping Ning Chi Wang Xin Sun Fei Wang Peng Gao Kai Li 

机构地区：[1]Faculty of Environmental Science and Engineering,Kunming University of Science and Technology,Kunming 650500,China [2]National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries,Kunming University of Science and Technology,Kunming 650500,China [3]Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,China [4]City College,Kunming University of Science and Technology,Kunming 650500,China

出　　处：《Journal of Environmental Sciences》2025年第2期476-488,共13页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China (Nos.52260013,51968034,and 21876071);the Yunnan Major Scientific and Technological Projects (No.202202AG050005).

摘　　要：In this study,non-thermal plasma(NTP)was employed to modify the Cu/TiO_(2)adsorbent to efficiently purify H_(2)S in low-temperature and micro-oxygen environments.The effects of Cu loading amounts and atmospheres of NTP treatment on the adsorption-oxidation performance of the adsorbents were investigated.The NTP modification successfully boosted the H_(2)S removal capacity to varying degrees,and the optimized adsorbent treated by air plasma(Cu/TiO_(2)-Air)attained the best H_(2)S breakthrough capacity of 113.29 mg H_(2)S/gadsorbent,which was almost 5 times higher than that of the adsorbent without NTP modification.Further studies demonstrated that the superior performance of Cu/TiO_(2)-Air was attributed to increased mesoporous volume,more exposure of active sites(CuO)and functional groups(amino groups and hydroxyl groups),enhanced Ti-O-Cu interaction,and the favorable ratio of active oxygen species.Additionally,the X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)results indicated the main reason for the deactivationwas the consumption of the active components(CuO)and the agglomeration of reaction products(CuS and SO_(4)^(2−))occupying the active sites on the surface and the inner pores of the adsorbents.

关 键 词：Non-thermal plasma(NTP) Surface modification Simultaneous adsorption-oxidation Cu/TiO_(2)(TiO_(2)loaded with copper) H_(2)S 

分 类 号：O64[理学—物理化学]