High dispersion of heteropolyacid nanoparticles on hydrothermally Cs-modified three-dimensionally ordered macroporous SiO2 with excellent selectivity in methacrolein oxidation

作     者：Heng Zhang Junqi Liu Chenyuan Liu Tingting Wang Wancheng Zhu Heng Zhang;Junqi Liu;Chenyuan Liu;Tingting Wang;Wancheng Zhu

作者机构：School of Chemistry and Chemical EngineeringQufu Normal UniversityQufu 273165China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第11期

页      面：2785-2791页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(21206179) the Natural Science Foundation of Shandong Province(ZR2018MB033) 

主　　题：Catalyst support Heteropolyacid Nanoparticles Oxidation Methacrolein 

摘      要：Heteropolyacid nanoparticles(NPs)were supported on Cs-modified three-dimensionally ordered macroporous(3DOM)SiO2 and used as the catalyst for the oxidation of methacrolein(MAL)to methacrylic acid(MAA).Hydrothermal treatment and incipient wetness impregnation were employed respectively for the *** was found that hydrothermal Cs-modification of 3DOM SiO2 promoted the dispersion of the supported heteropolyacid,which showed an average particle size of 5.2 nm,much smaller than that(17.6 nm)on the Csmodified 3DOM SiO2 prepared by incipient wetness *** effects of hydrothermal treatment on the structure and catalytic performance of the catalyst were *** showed that the ion exchange between Cs+and the surface silanol groups on 3DOM SiO2 was promoted with the increase of the hydrothermal ***,Cs-modification helped the heteropolyacid to retain intact Keggin structure,inhibiting the formation of *** dispersed heteropolyacid NPs with enhanced structural stability exhibited excellent selectivity to MAA in the oxidation of MAL.