Synthesis and Catalytic Activity of SBA-15 Mesoporous Silica Modified by Cerium

Journal of Petrochemical Universities ›› 2008, Vol. 21 ›› Issue (1): 46-50.

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Synthesis and Catalytic Activity of SBA-15 Mesoporous Silica Modified by Cerium

TIAN Zhi-ming^1,2, DENG Qi-gang², ZHAO De-feng¹

1.State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian Liaoning 116012,P.R.China;
2.College of Chemistry and Chemical Engineering of Qiqihar University,Qiqihar Heilongjiang161006,P.R.China

Received:2006-12-06 Published:2008-03-20 Online:2017-06-28

铈改性SBA-15介孔分子筛的合成及催化性能

田志茗1,2, 邓启刚2, 赵德丰1

1.大连理工大学国家精细化工重点实验室,辽宁大连116000; 2.齐齐哈尔大学化学化工学院,黑龙江齐齐哈尔161000

作者简介:田志茗(1964-),女,黑龙江齐齐哈尔市,教授,博士。

Abstract

Abstract:

Mesoporous silica molecular sieve Ce-SO₄^2--SBA-15 was synthesized via incipient-wetness impregnation. Characterization was done by X-ray diffraction (XRD), IR spectroscopic, nitrogen adsorption techniques . The results show that cerium has been incorporated into SBA-15 molecular sieve．The prepared materials keep the highly ordered mesoporous two-dimensional hexagonal structure and the mesoporous channel structure．The acid strength (pH=1.8 ) on catalyst surface was determined by mean of Hammett indication method,and attribute to solid acid.The catalyst prepared by impregnating SBA-15 in solution of 0.1 mol/L ceric sulfate and being calcined at 300 ℃ for 3 h showed best catalytic activity in synthesis of n-butyl acetate. The yield of n-butyl acetate was up 95.7% under the optimum conditions.

Key words: Composite material , , SBA-15 molecular sieve modification , Cerium , , Characterization , Catalysis

摘要： 利用浸渍法制备了铈改性的介孔材料Ce-SO24--SBA-15,采用 XRD、红外光谱和 N2 吸附-脱附
测定等手段对样品进行了表征。结果表明,制得的复合材料保持载体SBA-15高度有序的介孔二维六角孔道结构。
用Hammett指示剂法测定了改性介孔材料表面pH 为1.8,属于固体酸。用0.1mol/L的硫酸高铈浸渍SBA-15,
焙烧温度为300℃,焙烧时间3h,通过乙酸正丁酯的合成反应考察催化剂Ce-SBA-15的制备,酯化率为95.7%

关键词: 复合材料 , , SBA-15分子筛改性 , , Ce , , 表征 , , 催化

TIAN Zhi-ming, DENG Qi-gang, ZHAO De-feng.

Synthesis and Catalytic Activity of SBA-15 Mesoporous Silica Modified by Cerium

[J]. Journal of Petrochemical Universities, 2008, 21(1): 46-50.

田志茗, 邓启刚, 赵德丰. 铈改性SBA-15介孔分子筛的合成及催化性能[J]. 石油化工高等学校学报, 2008, 21(1): 46-50.

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Synthesis and Catalytic Activity of SBA-15 Mesoporous Silica Modified by Cerium

铈改性SBA-15介孔分子筛的合成及催化性能

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