微波水热改性制备S2O82-/Fe2O3-SiO2固体酸及催化性能

引用本文: 吴东辉, 金瑞娣, 汪信. 微波水热改性制备S₂O₈^2-/Fe₂O₃-SiO₂固体酸及催化性能[J]. 应用化学, 2005, 22(8): 879-882. shu

Citation: WU Dong-Hui, JIN Rui-Di, WANG Xin. Preparation of S₂O₈^2-/Fe₂O₃-SiO₂ Solid Acid by Microwave Hydrothermal Treatment and Its Catalytic Activity[J]. Chinese Journal of Applied Chemistry, 2005, 22(8): 879-882. shu

微波水热改性制备S₂O₈^2-/Fe₂O₃-SiO₂固体酸及催化性能

吴东辉 ^{a,b,
,} ,
金瑞娣 ^b, ,
汪信 ^a,

1.
a 南京理工大学材料化学研究室南京 210094;
2.
b 南通大学化学化工学院南通

通讯作者: 吴东辉,男,1964年生,博士研究生,副教授;E-mail:wudh130@sina.com;研究方向:纳米材料制备及应用

基金项目:
江苏省自然科学基金(BK2002100)资助项目 (BK2002100)

摘要: 对共沉淀法得到的Fe₂O₃-SiO₂混合氧化物前驱物进行微波水热改性处理,经浸渍(NH₄)₂S₂O₈后再焙烧得S₂O₈^2-/Fe₂O₃-SiO₂固体酸催化剂。用XRD、TEM、N₂气吸附/脱附及化学分析方法对其进行了表征,用乙酸/丁醇酯化催化反应评估固体酸的催化性能,并与通常条件下制得的催化剂进行了比较。结果显示,引入SiO₂会延迟Fe₂O₃晶体的形成与长大;对前驱物用250 W的微波水热改性处理1.5 h,制得的固体酸具有适中的比表面积、均匀的孔径分布,含硫量为6.02%,比表面积为37.1 m²/g。该固体酸对乙酸丁醇酯化反应有很高的催化活性,催化酯化反应3h,乙酸的转化率高达97.7%。

关键词:

English

Preparation of S₂O₈^2-/Fe₂O₃-SiO₂ Solid Acid by Microwave Hydrothermal Treatment and Its Catalytic Activity

1.
a Materials Chemistry Laboratory, Nanjing University of Science & Technology, Nanjing 210094;
2.
b School of Chemistry and Chemical Engineering, Nantong University, Nantong

Corresponding author: 吴东辉,男,1964年生,博士研究生,副教授;E-mail:wudh130@sina.com;研究方向:纳米材料制备及应用

Received Date: 06 October 2004
Fund Project:
江苏省自然科学基金(BK2002100)资助项目

Abstract: The precursors of S₂O₂^-8/Fe₂O₃-SiO₂ solid acids prepared via co-precipitation method were modified by microwave hydrothermal treatment.After being impregnated in a (NH₄)₂S₂O₈ solution and calcined at a certain temperature,solid acid catalysts were formed.The samples were characterized by XRD,TEM,N₂ gas adsorption/desorption and chemical analysis.The catalytic activities of the solid acids were evaluated by esterification of acetic acid and butanol.In addition,the solid acid catalysts were compared with other catalysts prepared under normal conditions.The results show that adding SiO₂ retards the formation and growth of Fe₂O₃ crystals.After the precursors were modified via 250 W microwave hydrothermal treatment,the solid acids had a moderate specific area (37.1 m²/g) and a narrow pore size distribution,and the sulphur content was 6.02%.The solid acid showed a high catalytic activity.At 3 h reaction time,the convertion of acetic acid reached 97.7%.

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

微波水热改性制备S₂O₈^2-/Fe₂O₃-SiO₂固体酸及催化性能

通讯作者: 吴东辉,男,1964年生,博士研究生,副教授;E-mail:wudh130@sina.com;研究方向:纳米材料制备及应用

English

Preparation of S₂O₈^2-/Fe₂O₃-SiO₂ Solid Acid by Microwave Hydrothermal Treatment and Its Catalytic Activity

Corresponding author: 吴东辉,男,1964年生,博士研究生,副教授;E-mail:wudh130@sina.com;研究方向:纳米材料制备及应用

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