In situ formation of composite micro-mesoporous dendritic fibrous nano-silica(DFNS) and Al-DFNS was prepared using a cetylpyridinium bromide(CPB) template synthetic system. Dealumination is induced by impregnation of ...In situ formation of composite micro-mesoporous dendritic fibrous nano-silica(DFNS) and Al-DFNS was prepared using a cetylpyridinium bromide(CPB) template synthetic system. Dealumination is induced by impregnation of zirconium with flux followed by a sulfuric acid treatment. This procedure results in a series of highly uniform nano-spheres, which exhibit stronger acid property than that of Al-MCM-41. In the selective alkylation of anthracene with tert–amyl alcohol, SO_(4)^(2-)modified Zr-contained dealuminated Al-DFNS(SZ-De Al-DFNS) shows great catalytic activity and higher conversion(60.8%). The DFNS samples were characterized with XRD, SEM, TEM, NH_(3)-TPD and other techniques. The results reveal that DFNSs consist of center-radial micro-mesopores and that the acid contribution of SZ-De Al-DFNS is much broader,as compared with amorphous aluminosilicate.展开更多
基金supported by the Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology (No. 2017E10001)。
文摘In situ formation of composite micro-mesoporous dendritic fibrous nano-silica(DFNS) and Al-DFNS was prepared using a cetylpyridinium bromide(CPB) template synthetic system. Dealumination is induced by impregnation of zirconium with flux followed by a sulfuric acid treatment. This procedure results in a series of highly uniform nano-spheres, which exhibit stronger acid property than that of Al-MCM-41. In the selective alkylation of anthracene with tert–amyl alcohol, SO_(4)^(2-)modified Zr-contained dealuminated Al-DFNS(SZ-De Al-DFNS) shows great catalytic activity and higher conversion(60.8%). The DFNS samples were characterized with XRD, SEM, TEM, NH_(3)-TPD and other techniques. The results reveal that DFNSs consist of center-radial micro-mesopores and that the acid contribution of SZ-De Al-DFNS is much broader,as compared with amorphous aluminosilicate.
