摘要
为了降解环境污染物,通过磁控溅射的方法在玻璃基底上溅射沉积Cu2O/TiO2/Pt复合薄膜。采用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外可见分光光谱仪(UV-vis)和光致发光光谱仪(PL)对复合薄膜的表面形貌和光学性能进行分析。通过可见光下对甲基橙溶液的光催化降解试验研究了薄膜的光催化活性。结果表明:Cu2O/TiO2/Pt复合薄膜共有3层,从下到上依次为Pt层、锐钛矿型TiO2层和Cu2O层。薄膜表面平整致密,由形状规则的球形颗粒组成。Cu2O/TiO2/Pt复合薄膜的光催化活性高于Cu2O/TiO2复合薄膜的和纯TiO2薄膜的光催化活性。光催化活性的提高是由于Pt层的存在进一步抑制了光生电子与空穴的复合,延长了光生载流子的寿命,提高了量子产率,进而有效地改善了薄膜的光催化活性。
In order to degrade environmental pollutants,Cu2O/TiO2/Pt composite films were deposited on glass substrates using magnetron sputtering method.The surface morphologies and optical properties of the composite films were characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,UVvisible spectroscopy（UV-vis）and photoluminescence spectroscopy（PL）.The photocatalytic activity of the samples was evaluated by the photocatalytic degradation of methyl orange aqueous solution under visible light irradiation.The results indicate that the Cu2O/TiO2/Pt composite films consist of three layers：Pt layer,anatase-TiO2layer and Cu2O layer from the bottom to the top.The surface of the films is even and composed of regular-shaped spherical particles.The photocatalytic activity of the Cu2O/TiO2/Pt composite films exceeds that of the Cu2O/TiO2composite films and the pure TiO2films.Such enhancement is ascribed to the presence of the Pt layer,which further inhibits the photogenerated electron-hole recombination,prolongs the lifetime of the photogenerated carriers,increases the quantum efficiency and hence improves the photocatalytic activity of the film effectively.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2014年第3期15-19,共5页
China Surface Engineering
基金
国家自然科学基金(51301118
51175363)
山西省高等学校科技创新项目(2013108)
作者简介
余彬（1988-），女（汉），山西临汾人，硕士生；研究方向：TiO2薄膜的改性技术
作者地址：山西省太原市万柏林区迎泽西大街030024太原理工大学材料科学与工程学院Tel：（0351）6010022（王红霞）E—mail：wanghxia1217@163．com
