介孔材料
铜
介孔二氧化硅
热稳定性
化学
兴奋剂
热处理
化学工程
螯合作用
纳米颗粒
材料科学
无机化学
纳米技术
有机化学
催化作用
复合材料
工程类
光电子学
作者
Shengpan Peng,Wenhui Li,Yangbo Deng,Weiman Li,Xiang Ma,Yunfa Chen
标识
DOI:10.1016/j.jcis.2017.12.005
摘要
Mercaptans are highly volatile compounds responsible for disagreeable odors and very low olfactory threshold, especially for CH3SH (0.4 ppvb). To the best knowledge of us, approach for controlling low-concentrated odors (i.e. 1-10 ppm) is scarcely reported. In this research, Cu-doped mesoporous silica was synthesized for removal of low-concentrated CH3SH. The as-prepared samples show considerably thermal and mechanical stability and could be thermal-regenerated. Copper loading ratio and humidity have significant impacts on eliminating odors. According to XRD, TEM, BET, NMR and EPR, we deduce that surface groups on CuO nanoparticles and the SiOCu group are highly possibly transformed into a hydrated complex which is much more effective in capturing CH3SH with its empty Cu-3d orbit. Although CH3SH has to compete with water for absorption sites, it is always the "winner" owing to the strong chelating ability between SH group and Cu (Ⅱ).
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