含钒介孔空心球的合成  

Synthesis of Vanadium-mesoporous Hollow Spheres

作　　者：时晓波[1] 陈玉[1] 孔岩[1] 吴丞[1] 王军[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009

出　　处：《无机材料学报》2012年第7期699-705,共7页Journal of Inorganic Materials

基　　金：国家自然科学基金(20876077);江苏省自然科学基金支撑计划(BE2008142);江苏省高校自然科学基金重大项目(10KJA530015)~~

摘　　要：以十六烷基三甲基溴化铵、十二烷基硫酸钠和P123三种表面活性剂为共模板剂合成了含钒介孔空心球,研究了钒含量及反应条件对空心球形成的影响.结果表明:当n(V)/n(Si)低于0.05时不能形成空心球,而n(V)/n(Si)过大时,大部分钒在材料中以氧化物形式出现,合适的n(V)/n(Si)为0.1.最佳反应条件为pH值5.0,45℃反应2 h.产物结构规整,且对苯乙烯过氧化氢选择氧化反应有着良好的催化性能.Vanadium-containing mesoporous silica with hollow spherical morphology was successfully synthesized by using CTAB,SDS and P123 as co-template.The influences of vanadium content and reaction conditions on the formation of the materials were also studied.Results indicated that the hollow spheres could not be shaped as molar ratio of V to Si was lower than 0.05 while excess vanadium content led large amount of vanadium oxides existed in the materials.The adequate molar ratio of V to Si was 0.1.The optimal synthesis conditions were reacted at 45℃ for 2 h under pH value of 5.The products with regular structure and morphology exhibited high catalytic activity on the selective oxidation of styrene by hydrogen peroxide.

关 键 词：钒 介孔材料 空心球 

分 类 号：O643[理学—物理化学]