【摘 要】
：
An encapsulation-structured Fe2O3@meso-ZSM-5(Fe@MZ5)was fabricated by confining Fe2O3 nanoparticles(ca.4 nm)within the ordered mesopores of hierarchical ZSM-5 z
【机 构】
：
School of Chemical Engineering,Advanced Institute of Materials Science,Changchun University of Techn
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An encapsulation-structured Fe2O3@meso-ZSM-5(Fe@MZ5)was fabricated by confining Fe2O3 nanoparticles(ca.4 nm)within the ordered mesopores of hierarchical ZSM-5 zeolite(meso-ZSM-5),with ferric oleate and amphiphilic organosilane as the iron source and meso-porogen,respectively.For comparison,catalysts with Fe2O3(ca.12 nm)encapsulated in intra-crystal holes of meso-ZSM-5 and with MCM-41 or ZSM-5 phase as the shell were also prepared via sequential desilication and recrystallization at different pH values and tempera-tures.Catalytic phenol hydroxylation performance of the as-prepared catalysts using H2O2 as oxidant was com-pared.Among the encapsulation-structured catalysts,Fe@MZ5 showed the highest phenol conversion and hydroquinone selectivity,which were enhanced by two times compared to the Fe-oxide impregnated ZSM-5(Fe/Z5).Moreover,the Fe-leaching amount of Fe@MZ5 was only 3％of that for Fe/Z5.The influence of reaction parameters,reusability,and·OH scavenging ability of the catalysts were also investigated.Based on the above results,the structure-performance relationship of these new catalysts was preliminarily described.
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