文献类型：期刊文献

英文题名：Pd/transition metal oxides functionalized ZSM-5 single crystals with b-axis aligned mesopores: Efficient and long-lived catalysts for benzene combustion

作者：Liu, Fujian[1,2];Zuo, Shufeng[1];Wang, Chao[1];Li, Jiantao[3];Xiao, Feng-Shou[2];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Dept Chem, Key Lab Alternat Technol Fine Chem Proc Zhejiang, Shaoxing 312000, Peoples R China;[2]Zhejiang Univ, Dept Chem, Hangzhou 310007, Zhejiang, Peoples R China;[3]SINOPEC, Fushun Res Inst Petr & Petrochem, Fushun 113001, Peoples R China

年份：2014

卷号：148

起止页码：106

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：SCI-EXPANDED(收录号：WOS:000332431500012)、、WOS

基金：This work was supported by the National Natural Science Foundation of China (21203122), the Foundation of Science and Technology of Shaoxing Bureau (2012B70018), Key Sci-Tech Innovation Team Project of Zhejiang Province (2010R50014-20), China and Postdoctoral Foundation of China (2012M520062).

语种：英文

外文关键词：Mesoporous zeolites; VOCs removing; b-axis aligned mesopores; Amphiphilic copolymer; Self-assembly

外文摘要：A series of PdO/transition metal oxides functionalized mesoporous ZSM-5 single crystals with b-axis aligned mesopores (x%Pd/x%M-ZSM-5-OMs) have been successfully prepared from self-assembly of the designed cationic amphiphilic copolymer of polystyrene-co-poly4-vinylpyridine (C-PSt-co-P4VP) with ZSM-5 zeolite precursor based on their strong positive-negative charge interaction under high temperature hydrothermal conditions. Characterizations of XRD patterns showed that x%Pd/x%M-ZSM-5-OMs exhibit good crystallinity with typical MFI zeolite characters; N-2 isotherms showed that x%Pd/x%M-ZSM-5-OMs have large BET surface areas and mesopore volumes. SEM images showed the single crystal structure ofx%Pd/x%M-ZSM-5-OMs, which have abundant and b-axis aligned mesopores, running through the whole zeolite crystals. TEM images further confirmed b-axis aligned mesopores, and good dispersion of active sites with high degree of crystallinity in x%Pd/x%M-ZSM-5-OMs. XPS spectra showed that transition metal oxides and PdO active species have been successfully loaded into ZSM-5-OM support. H-2-TPR curves showed the low reduction temperatures of PdO and transition metal species in x%Pd/x%M-ZSM-5-OMs, which was favorable for the enhancement of their abilities for VOCs combustion. Catalytic tests showed that x%Pd/x%M-ZSM-5-OMs exhibit good catalytic activities and long catalytic lives for benzene combustion under rather mild conditions in comparison with that of x%Pd/x%M-ZSM-5, which would be very important for the wide applications of zeolites with controlled mesopores in the areas of VOCs oxidation. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.