文献类型：期刊文献

英文题名：Synthesis and Characterization of Hierarchical ZSM-5 Zeolites with Outstanding Mesoporosity and Excellent Catalytic Properties

作者：Song, Guoqiang Chen, Wenting Dang, Peipei Yang, Shengyuan Zhang, Yuan Wang, Yuanyi Xiao, Ruidi Ma, Rong Li, Fuxiang

第一作者：宋广强;宋国强

通信作者：Li, FX[1]

机构：[1]Guizhou Inst Technol, Special Funct Mat Collaborat Innovat Ctr Guizhou, 1st Caiguan Rd, Guiyang 550003, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Sch Chem Engn, Engn Technol Res Ctr Fluorine Silicon Mat, Guiyang, Guizhou, Peoples R China;[3]Guizhou Inst Technol, Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang, Guizhou, Peoples R China;[4]Taiyuan Univ Technol, Coll Chem & Chem Engn, 79 Yingze West St, Taiyuan 030024, Shanxi, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Taiyuan Univ Technol, Coll Chem & Chem Engn, 79 Yingze West St, Taiyuan 030024, Shanxi, Peoples R China.

年份：2018

卷号：13

外文期刊名：NANOSCALE RESEARCH LETTERS

收录：;EI(收录号：20184706109103);Scopus(收录号：2-s2.0-85056631246);WOS:【SCI-EXPANDED(收录号:WOS:000450465000001)】；

基金：This work was supported by the National Natural Science Foundation of China (50972097), Natural science foundation of Guizhou Provincial Department of Education (Qianjiaohe KY Zi [2016] 014), Natural science foundation of Guizhou Provincial Department of Education (Qianjiaohe KY Zi [2017] 009), Youth Science and Technology Talents Growth project of the Guizhou Provincial Education Department (Qianjiaohe KY Zi [2017] 220), Civil-Military Integration in Guizhou Institute of Technology (KJZX17-016), and Natural Science Foundation of ShanXi (2014011012-4).

语种：英文

外文关键词：Hierarchical; ZSM-5 zeolites; Soft-template; Benzylation; LDPE cracking

摘要：A novel soft-template (ST) is fabricated and successfully employed as mesoporogen to synthesis hierarchical ZSM-5 zeolites with outstanding mesoporosity and high hierarchy factors. The as-produced soft-template can connect steadily with the MFI frameworks by covalent bonds of -Si-O-Si- during the high-temperature hydrothermal crystallization process. This type of connection mode can effectively avoid the formation of amorphous materials, and the specific structure of this soft-template can efficiently introduce plentiful of mesopores with few micropores being consumed. The particles of as-synthesized hierarchical ZSM-5 zeolites are in size of about 1m, which are made up of nanocrystals of 60-150nm. The structure parameters of these samples are characterized with the techniques of X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, nitrogen sorption, scanning electron microscope (SEM), transmission electron microscope (TEM), NH3 temperature-programmed desorption (NH3-TPD) and thermogravimetric (TG). Due to the nature of zeolites and great microporosity, these hierarchical samples present great tolerance of hydrothermal treatment. And because of the intracrystalline mesopores, large external surface areas, and abundant accessible acid sites, whether in conversion rate of reactants or selectivity of products, the hierarchical samples exhibit excellent catalytic performance in the reactions of alkylation between benzene and benzyl alcohol, cracking of 1,3,5-tri-isopropylbenzene, and thermal cracking of low-density polyethylene (LDPE), respectively.