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[1]周颖,张利雄.简单水热合成法制备介孔ZSM-5分子筛[J].南京工业大学学报(自然科学版),2016,38(01):19-26.[doi:10.3969/j.issn.1671-7627.2016.01.004]
 ZHOU Ying,ZHANG Lixiong.Preparation of mesoporous ZSM-5 zeolites by simple hydrothermal synthesis[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(01):19-26.[doi:10.3969/j.issn.1671-7627.2016.01.004]
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简单水热合成法制备介孔ZSM-5分子筛()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年01期
页码:
19-26
栏目:
出版日期:
2016-01-10

文章信息/Info

Title:
Preparation of mesoporous ZSM-5 zeolites by simple hydrothermal synthesis
文章编号:
1671-7627(2016)01-0019-08
作者:
周颖张利雄
南京工业大学 化工学院 材料化学工程国家重点实验室,江苏 南京 210009
Author(s):
ZHOU YingZHANG Lixiong
State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
ZSM-5沸石 介孔分子筛 水热合成
Keywords:
ZSM-5 zeolites microporus molecular sieves hydrothermal synthetic
分类号:
O643.3
DOI:
10.3969/j.issn.1671-7627.2016.01.004
文献标志码:
A
摘要:
本文以NaOH、四丙基溴化铵(TPABr)、Al2(SO4)3·18H2O和硅溶胶(SiO2-sol)为原料,采用水热合成法,通过简单的原料比例调变,制备具有介孔结构的ZSM-5分子筛,考察合成配方中水含量、Si含量、Al含量和TPABr含量对介孔、形貌的影响。采用X线衍射仪(XRD)、傅里叶变换红外光谱仪(FT-IR)、扫描电子显微镜(SEM)和N2吸附-脱附等对样品进行表征。结果表明:在前驱液摩尔配比n(SiO2):n(Al2O3):n(Na2O):n(TPABr):n(H2O)=100:1:8.75:12:2 600的情况下,于180 ℃下反应36 h,可制得直径为18~20 μm的球形ZSM-5分子筛,分子筛表面由二级纳米晶粒堆砌而成,总比表面积为371 m2/g,介孔率为32.1%,介孔孔径为2.0 nm。水含量的增加和Si含量的降低分别有助于二级晶粒更为紧密地堆积和向长条状生长,而Al和TPABr含量的增加则会导致颗粒难以成型且颗粒的尺寸的减小。另外,水和Al含量的增加及Si含量的降低会导致样品总孔容、介孔率和孔径的减小,而样品比表面积则随水含量的降低及Al、Si含量的增加而减小。TPABr含量的调变对样品介孔性质影响不大。
Abstract:
Mesoporous ZSM-5 zeolites were prepared by a hydrothermal synthetic route using NaOH,tetrapropyl ammonium bromide(TPABr),Al2(SO4)3·18H2O and silica sol(SiO2-sol)as reagents at 180 ℃ for 36 h.The morphology and the structure of products were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),Fourier transform infrared spectoscopy(FT-IR), and N2 adsorption-desorption technologies.Results showed that, when the precursor mole ratio fixed on n(SiO2):n(Al2O3):n(Na2O):n(TPABr):n(H2O)=100:1:8.75:12:2 600 at 180 ℃ for 36 h, the obtained ZSM-5 zeolites were constructed by nanoparticles forming spherical crystals with diameters of 18-20 μm.They were hierarchically porous. The BET specific surface area,mesoporosity and mesopore size were 371 m2/g,32.1% and 2.0 nm.The increase content of H2O conduced to the secondary grain acumulate together compactly,while the decrease content of SiO2-sol conduced to the secondary grains grown into long strips.The increase content of Al and TPABr led to less formation of microsphere and reduction of the microsphere size,respectively.Additionally, the total pore volume,the mesopore size and the mesoporosity decreased with the increase of H2O and Al as well as the decrease of Si,while the specific suface decreased with the decrease of H2O as well as the increase of Al and Si.The modulation of H2O/TPABr mole ratio had little impact on the structure of the samples.

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备注/Memo

备注/Memo:
收稿日期:2015-01-18
作者简介:周颖(1984—),女,江苏盐城人,硕士,主要研究方向为分子筛和分子筛膜; 张利雄(联系人),教授,E-mail:lixiongzhang@yahoo.com.
引用本文:周颖,张利雄.简单水热合成法制备介孔ZSM-5分子筛[J].南京工业大学学报(自然科学版),2016,38(1):19-26..
更新日期/Last Update: 2016-01-20