复合氧化物介孔组装体系及其在有机污染物苯酚降解的研究  

Study on the composite oxide assemblage system and its application in organic contamination degradation of phenol

作　　者：王广健[1,2] 杨振兴[2] 徐明霞[1] 刘广卿[2] 陈士夫[2] 张锴[2] 

机构地区：[1]天津大学材料科学与工程学院,天津300072 [2]安徽淮北煤炭师范学院化学系,安徽淮北235000

出　　处：《功能材料》2007年第A07期2506-2509,共4页Journal of Functional Materials

基　　金：安徽省教育厅科研基金资助项目（2006kj288）;国家自然科学基金资助项目（20673042）

摘　　要：以十六烷基三甲基溴化铵（CTAMB）为结构模板剂，以硅酸乙酯为硅源，钛酸四正丁酯为钛源，采用水热法合成了复合氧化物介孔组装体TiO2-Cu2O-MCM-41（TCM-41）。X射线衍射（XRD）表明，TCM-41具有很好的长程有序性。高分辨透射电镜研究表明，TCM-41孔道内径在3．1nm左右，孔径分布窄。扫描电镜分析表明，TCM-41具有很窄的粒度分布，平均粒径在500nm左右且其颗粒不规则。魔角旋转固体核磁共振（MAS-NMR）^29Si研究表明，其Q4/（Q3＋Q2）比值较高（2．85），骨架缺陷越少，其水热稳定性较高，与傅立叶变换红外光谱（FFIR）研究结果相一致。苯酚的光催化降解结果表明，新的特殊结构的TCM-41，在利用TiO2在紫外区和Cu2O在可见光区高活性的同时，还可以利用介孔分子筛的特殊微环境改善复合光催化剂的水热稳定性，是一种很有发展潜力的复合协同光催化剂。The composite oxide mesoporous assemblage TiO2-Cu2O-MCM-41 （TCM41） was synthesized by hydrothermal method using cetyltrimethylammonium bromide （CTAB） surfactant, ethyl silicate and tetrabutyl titanate as structure-directing template, silicon source and titanic source, respectively. Characterizations with XRD showed that TCM41 was of long-range ordering. High resolution transition electron microscope confirmed its narrow pore diameter distribution with uniform internal porosity（ca. 3.1 nm）. Scanning electron microscope observation indicated that their were of anomalous particles with average size ca. 500nm. ^29Si-MAS-NMR revealed that its Q4/（Q3＋Q2） value was higher（ca. 2.85）, indicating lower framework defects and higher hydrothermal stability of catalysts, in good agreement with that of results of Fourier transform infrared spectroscopy（FTIR）. Photocatalysis degradation of phenol illuminated that high activity was employed at ultraviolet （TiO2） and visible region （Cu2O） in the novel and special structure TCM41. Moreover, hydrothermal stability of composite photocatalysts was improved greatly via special microstructure of mesoporous molecular sieves. Consequently, it was a potential composite photocatalyst with synergistic catalysis effect.

关 键 词：组装 复合氧化物 协同催化 苯酚 降解 

分 类 号：TM383[电气工程—电机] TQ426[化学工程]