Fabrication and catalytic performance of meso-ZSM-5 zeolite encapsulated ferric oxide nanoparticles for phenol hydroxylation

被引：12
作者：
Diao, Zhenheng [1 ]
Cheng, Lushi [1 ]
Guo, Wen [1 ]
Hou, Xu [1 ]
Zheng, Pengfei [1 ]
Zhou, Qiuyueming [1 ]
机构：
[1] Changchun Univ Technol, Sch Chem Engn, Adv Inst Mat Sci, Changchun 130012, Peoples R China
来源：
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING | 2021年 / 15卷 / 03期
基金：
美国国家科学基金会;
关键词：
phenol hydroxylation; encapsulation structure; structure-performance relationship; meso-ZSM-5; ferric oxide; FENTON CATALYST; FE; OXIDATION; BENZENE; FE2O3; DECOMPOSITION; CRACKING; AMMONIA; SURFACE; SIZE;
D O I：
10.1007/s11705-020-1972-3
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
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 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 temperatures. Catalytic phenol hydroxylation performance of the as-prepared catalysts using H2O2 as oxidant was compared. 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 center dot 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.
引用
收藏
页码：643 / 653
页数：11
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