预涂CuO的二氧化钛薄膜光催化性能与结构研究

A Study of Photocatalysis Activity and Microstructure of Titanium Dioxide Thin Films Precoated with CuO

摘要:

载波片上浸涂一层CuO的TiO2薄膜会诱导金红石相生成，并有效提高其光催化活性，其中预涂一层含量1．0％（质量分数，下同）Cu（CH3COO）2水溶液其光催化活性增幅最大（提高53％）。结果表明：TiO2薄膜晶格畸变越大，金红石型TiO2含量越高，薄膜光催化性能就越好。扫描电镜显示预涂一层CuO的TiO2薄膜颗粒粒径较纯TiO2薄膜小。X射线光电子能谱研究表明，预涂一层CuO的TiO2薄膜中Ti^3＋含量较纯TiO2薄膜高。

Abstract:

TiO2 thin films pre-coated with CuO can induce the formation of their rutile type structure. The pre-coating process was completed through the deposit of TiO2 sol-gel onto a glass substrate smeared with a layer of Cu(CH3COO)2 solution. The photocatalysis activity of the TiO2 thin films obtained was improved significantly. When a Cu(CH3COO)2 solution of 1(wt)% was used in the so-called pre-coated process, the activity of formed thin films reached their maximum, 53% higher than the untreated TiO2 thin films. Experimental results reveal that the greater the deformation of TiO2 lattice and the more the rutile type structure in the thin films, the higher the photocatalysis activity the thin films possess. SEM shows that the particle size of TiO2 films pre-coated with CuO is finer than that of the original films. XPS analysis demonstrates the Ti3+ content in the TiO2 thin films increases also when pre-coated with CuO.