摘要
以钛酸异丙酯为前驱体,反微乳法和溶胶-凝胶法相结合制备了TiO2纳米粉末,光还原法在TiO2表面沉积贵金属Pt。用XRD、XPS对材料进行了表征。结果表明:TiO2为锐钛矿晶型,平均粒径约17 nm,沉积在TiO2表面的Pt主要以单质形式存在,少量以氧化态Pt2+存在。光催化结果表明Pt/TiO2的光催化活性比纳米TiO2大大提高,用荧光光谱讨论了Pt/TiO2光催化活性提高的机理。
TiO2 nanoparticles were prepared by reverse mieroemulsion system and sol -gel method with titanium isopropoxide as precursor. Pt/TiO2 was obtained by photo - reduction. The structure was characterized by XRD and XPS. XRD results showed TiO, as prepared was anatase and the average particle size was about 17 nm. XPS analysis revealed the presence of Pt as mainly metallic state and small oxidative state. Photocatalysis tests showed that Pt/TiO2 exhibited higher activity than pure TiO2. The mechanism of photocatalytic activity enhancement of the Pt/TiO2 was discussed by photoluminescenee spectra.
出处
《盐城工学院学报（自然科学版）》
CAS
2006年第2期35-37,45,共4页
Journal of Yancheng Institute of Technology:Natural Science Edition
