晶化温度对v–mcm–41 分子筛介孔结构、形貌及性能影响.pdf

第 44 卷第 7 期 硅 酸 盐 学 报 Vol. 44 ，No. 7 2 0 1 6 年 7 月 JOURNAL OF THE CHINESE CERAMIC SOCIETY July ，2016 DOI ：10.14062/j.issn.0454-5648.2016.07.24 晶化温度对V–MCM–41 分子筛介孔结构、形貌及性能影响 张 强，许俊强，郭 芳，王耀琼 (重庆理工大学化学化工学院，重庆 400054) 摘 要：采用原位合成水热法制备了掺杂型 V–MCM–41 介孔分子筛。采用 X 射线衍射、Fourier 变换红外光谱和扫描电子显 微镜等研究了晶化温度对 V–MCM–41 分子筛的介孔结构、形貌和催化性能的影响。结果表明，晶化温度过低或过高时， V–MCM–41 介孔分子筛有序度较差；在 110 ℃晶化温度下，形成高度有序的六方相介孔结构的介孔分子筛。该分子筛具有 球形形貌特征，经水热处理 8 d 后仍具有介孔特征，比表面积保留率高达 80.7%。在苯乙烯催化氧化反应中，V–MCM–41 介 孔分子筛表现出较优的对苯乙烯催化氧化性能。 关键词：介孔分子筛；晶化温度；水热稳定性；苯乙烯催化氧化 中图分类号：TQ174.75 文献标志码：A 文章编号：0454–5648(2016)07–1064–07 网络出版时间：2016–05–30 10:27:26 网络出版地址：/kcms/detail/11.2310.TQ1027.014.html Effect of Crystallization Temperature on Mesoporous Structure, Morphology and Performance of V–MCM–41 Mesoporous Molecular Sieve ZHANG Qiang, XU Junqiang , GUO Fang, WANG Yaoqiong (School of Chemistry and Chemical Engineering, Chongqing University Of Technology, Chongqing 400054, China) Abstract: Molecular sieve V–MCM–41 with mesoporous structure and good hydrothermal stability was synthesized through in–situ hydrothermal method. Effect of the crystallization temperature on the materials were studied using X–ray diffraction, Fourier transformed infrared spectroscopy and scanning electron microscopy. The results show that the order of V–MCM–41 was poor when the crystallization at extra–low or high temperature. In particular, sample prepared at 110 ℃ for 48 h presents a complete spherical morphology with the ordered hexagonal structure, uniform pore size distribution and large surface area, compared to other samples. Meanw