摘要
以十六烷基三甲基溴化铵(CTAB)为模板剂,正硅酸四乙酯(TEOS)为硅源,偏钒酸铵(NH4VO3)为钒源,乙醇和水为共溶剂,合成了具有棒状形貌的V-MCM-41。通过XRD、SEM、N2吸附-脱附对样品进行了表征,并研究了样品在苯羟基化反应中的催化性能。结果表明,V-MCM-41具有高度有序的孔道结构和大的比表面积;随着钒质量分数的增加,样品逐渐由短的棒状形貌变为较长的棒状形貌,并且催化活性逐渐增强;在相同钒质量分数下,合成的棒状形貌的样品比普通块状形貌的样品具有更好的催化性能。
By using cetyltrimethylammonium bromide（ CTAB） as the template,tetraethyl orthosilicate（ TEOS） as the silica source,ammonium metavanadate（ NH4VO3） as the vanadium source,and water/ethanol as the co-solvent,the rod-like V-MCM-41 is synthesized. The samples are characterized by XRD,SEM and N2adsorption-desorption. Their catalytic performances for the hydroxylation of benzene are studied. The results show that V-MCM-41 has highly ordered porous structure and large specific surface area. As the vanadium loading increases,samples gradually changes their morphology from the short rod-like shape to longer rod-like shape. At the same vanadium content,V-MCM-41 with the rod-like morphology has the better catalytic property than the sample with the bulk-like morphology.
出处
《现代化工》
CAS
CSCD
北大核心
2014年第7期66-68,70,共4页
Modern Chemical Industry
