铂颗粒粒径效应:负载铂纳米颗粒的TiO_2薄膜性质研究  

Size Effect of Pt Nanoparticles: a Study of Properties of Pt Loaded TiO_2 Thin Film

作　　者：华南平[1] 甘玉琴[1] 徐娇珍[1] 邹翠娥[1] 杨平[1] 徐景坤[2] 杜玉扣[1] 

机构地区：[1]苏州大学化学化工学院,江苏苏州215006 [2]江西科技师范学院省有机功能分子重点实验室,江西南昌330013

出　　处：《光谱学与光谱分析》2005年第11期1861-1864,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(90207026);江苏省教委自然科学基金项目(04KJB150120)资助

摘　　要：制备了负载不同大小Pt纳米颗粒的TiO2薄膜。利用TEM测定了Pt粒子的大小,XRD,UV-Vis和测量光电流等方法对TiO2复合膜进行了表征,以亚甲基蓝降解反应评价了Pt/TiO2薄膜的光催化活性。结果表明,在负载相同物质的量的Pt情况下,Pt颗粒的大小直接影响TiO2薄膜的性能,显示较强的粒径效应,当负载平均粒径约5 nm的Pt粒子后,薄膜具有最高的光电流和光催化活性。TiO2 thin films loaded with Pt nanoparticles of different sizes were prepared. The sizes of the Pt nanoparticles were measured by TEM. The TiO2 thin films were characterized using XRD, UV-Vis and photocurrent measurement. The photocatalytic activities of the films were evaluated by the degradation of methylene blue under UV radiation. With the same molar quantity of loaded platinum, the properties of Pt loaded thin films were affected directly by the sizes of platinum nanoparticles, and showed strong size effect. When the particle size was 5 nm, the photocurrent and photocatalytic activity reached the maximum.

关 键 词：PT纳米粒子 TIO2薄膜 光催化降解 亚甲基蓝 

分 类 号：TQ426.8[化学工程]