摘要
以SiO2包覆的TiO2纳米管(TiNT@@SiO2)为载体,以H2PtCl6为前驱体,采用紫外光还原法制备了Pt纳米粒子填充的TiNT@@SiO2材料(Pt-TiNT@@SiO2).并采用透射电镜、场发射扫描电镜、电子能谱和X射线衍射等手段对材料样品进行了表征,考察了制备时紫外光照时间和强度以及Pt填充量对其形貌的影响.结果表明,Pt填充量为1.5%时,Pt-TiNT@@SiO2样品的光催化活性最高.同时还探讨了管内光催化机理.
The Pt nanoparticles-filled TiO2-semiconductor nanocomposite samples were prepared. By using SiO2-coated TiO2 nanotube （TiNT@@SiO2） as the support, Pt nanoparticles were successfully filled in TiNT@@SiO2 by a simple UV photoreduction method. The prepared Pt-TiNT@@SiO2 samples were characterized by transmission electron microscopy, field emission scanning electron microscopy, energy dispersive spectrometer, and X-ray diffraction. The photocatalytic activity of the samples for methanol oxidation shows that 1.5%Pt-TiNT@@SiO2 has the highest photo-activity. The mechanism of this inner-tube photocatalysis was discussed.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2011年第9期1513-1518,共6页
基金
国家自然科学基金(50802088
31070888)
浙江省杰出青年科学基金(R2101054)
浙江省自然科学基金(Y4080392
Y4100045)
浙江省钱江人才计划(2010R10023)~~
关键词
二氧化硅
二氧化钛
纳米管
铂
光催化
甲醇
氧化
silica
titania
nanotube
platinum
photocatalysis
methanol
oxidation
