Abstract: The supported nano-gold catalysts are obtained through liquid phase reduction method by using organosilane modified halloysite nanotubes (HNTs) and layered kaolin as carriers,and chloroauric acid as precursor.The liquid phase selective oxidation of cyclohexane is taken as a model reaction,the effects of the type of reducing agent and the morphology of carriers on the catalytic performance of the catalyst are investigated.It turns out that nano-gold disperses highly on the prepared 1.5% Au/AE-HNTs,with an average particle size of 2.6 nm only when the theoretical load of nano-gold is 1.5 wt%,tubular HNTs is used as the carrier,and NaBH4 is used as reducing agent.The 1.5% Au/AE-HNTs catalyst exhibits better catalytic oxidation performance in the model reaction,over which,the selectivity of KA oil reaches 83.06%,and the conversion of cyclohexane reaches 9.6%.XPS characterization results show that Au0 is the main catalytic active valence state.
谢艳玲, 祝琳华, 司甜. 改性不同形貌天然黏土负载纳米金催化剂的制备及催化性能研究[J]. 现代化工, 2021, 41(9): 107-111,117.
XIE Yan-ling, ZHU Lin-hua, SI Tian. Preparation of modified natural clay supported gold nanoparticles catalyst and study on its catalytic properties. Modern Chemical Industry, 2021, 41(9): 107-111,117.
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