钯氮共掺杂TiO_2薄膜的光催化还原性能  

Photocatalytic Reduction Properties of Palladium and Nitrogen Co-Doped TiO_2 Thin Films

作　　者：陈海洋[1] 何菲[1] 张旭海[1] 邵起越[1] 方峰[1] 

机构地区：[1]东南大学材料科学与工程学院,南京211189

出　　处：《材料研究学报》2017年第4期255-260,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51371050;51302038);江苏省六大人才高峰计划(2015-XCL-004)~~

摘　　要：采用磁控溅射法制备钯氮共掺杂二氧化钛薄膜,研究了Pd含量对薄膜的表面形貌、吸收光谱和可见光催化还原性能的影响。结果表明:Pd、N共掺杂TiO_2薄膜具有锐钛矿相和金红石相混合的结构,Pd的掺杂使TiO_2从锐钛矿相向金红石相转变。Pd元素主要以PdO的形式存在于薄膜表面。随着Pd含量的提高薄膜表面粗糙度增大,致密度减小。薄膜吸收光谱的吸收限,逐渐向可见光方向移动。Pd含量为0.4%(原子百分比)的薄膜,具有最优的可见光催化还原性能。Palladium and nitrogen co-doped TiO2 films were prepared by DC magnetron sputtering and then characterized in terms of surface morphology, absorption spectra and photocatalytic reduction property under visible light etc.. The results show that the N-TiO2 films are composed of anatase while they turn to be composed of rutile gradually due to the presence of Pd. After being co-doped with Pd, the films become loose with rougher surface. The introduction of Pd to N-TiO_2 thin films increases its effective absorption of visible light, as well as enhances its ability to capture electrons and separate photo-generated electron-hole pairs effectively. The photocatalytic reduction property of the films declines with the increasing Pd amount. Among others, the Pd-N-TiO_2 films with 0.4%（atomic fraction） Pd have the best photocatalytic reduction property.

关 键 词：无机非金属材料 光催化 磁控溅射 二氧化钛 

分 类 号：TB43[一般工业技术]