酚醛树脂辅助合成SiO_2/TiO_2介孔复合微球及其光催化  

Phenolic Resin Assisted Synthesis of SiO_2/TiO_2 Mesoporous Microspheres and Their Photocatalytic Performance

作　　者：陶玉贵[1] 万勇[1] 郑述祥[1] 张谐天 梁敏东 

机构地区：[1]安徽工程大学生物与化学工程学院,安徽芜湖241000

出　　处：《精细化工》2015年第5期491-495,共5页Fine Chemicals

基　　金：安徽省自然科学基金(1308085MC51);安徽省高校自然科学基金重点项目(KJ2012A034);全国大学生创新创业训练计划(201410363023)~~

摘　　要：利用Stber法合成的纳米SiO2为前体,在酚醛树脂和十六烷基三甲基溴化铵(CTAB)辅助下制备SiO2/TiO2介孔复合微球,并利用XRD、SEM、EDS、BET、BJH以及FTIR对材料的晶型、形貌以及结构进行了表征,以罗丹明B为目标降解物评价样品的光催化性能。结果表明,SiO2/TiO2介孔复合微球是由TiO2和SiO2组成,直径约300 nm,TiO2以纳米薄层方式均匀地沉积在SiO2表面,界面之间存在Si—O—Ti键;SiO2/TiO2介孔复合微球的比表面积为92.3 m2/g,较P25提高了约3倍。光催化评价表明,SiO2/TiO2介孔复合微球对罗丹明B的降解率达98%,较P25光催化降解率有明显提高。Nano-SiO2 was used as the matrix synthesised by Stober method. The phenolic resin and hexadeeyl trimethyl ammonium bromide （CTAB） were introduced to prepare SiO2/TiO2 mesoporous composite microspheres. Their crystal structure, morphology, and structure of the materials were characterized by means of XRD, SEM, EDS, BET, BJH and FTIR. Rhodamine B, the target degradation product, was used to evaluate the photocatalytic performance of the samples. The characterization results show that the SiO2/TiO2 mesoporous composite microspheres were composed of TiO2 and SiO2, and about 300 nm in diameter. TiO2 nanometer thin layer was uniformly deposited on the surface of SiO2 with Si-O-Ti bonds in their interface;The specific surface area of SiO/TiO2 mesoporous composite microspheres was about 92.3 m2/g , approximately 3 times as big compared with that of the P25. Photocatalytic evaluation shows that the degradation rate of SiO2/TiO2 mesoporous composite microspheres for Rhodamine B reached 98% , improving significantly compared with that of P25.

关 键 词：SiO2/TiO2 酚醛树脂 复合材料 表征 光催化 功能材料 

分 类 号：TQ316.6[化学工程—高聚物工业]