掺银二氧化钛薄膜的制备及其性能  

Preparation and properties of Ag-doped TiO_2 thin films

作　　者：操芳芳[1,2] 金良茂[1] 彭程[1] 王萍萍[1] 汤永康[1] 

机构地区：[1]蚌埠玻璃工业设计研究院,安徽蚌埠233000 [2]浮法玻璃新技术国家重点实验室,安徽蚌埠233000

出　　处：《材料热处理学报》2016年第3期6-11,共6页Transactions of Materials and Heat Treatment

基　　金：国家"973"计划(2012CB724608);安徽省自然科学基金(1408085MKL67);安徽省科技攻关计划项目(1301021015)

摘　　要：采用四氯化钛水解法制备了一系列不同Ag掺杂量的纳米Ag-TiO_2复合薄膜,运用X射线衍射(XRD)、扫描电镜(SEM)、紫外-可见(UV-Vis)光谱、光致发光(PL)谱、可见光透过(T%)光谱等手段对Ag-TiO_2进行了表征,采用接触角测量仪考察了Ag含量对TiO_2薄膜亲水性的影响,并以8W(λ=254nm)的UV灯作为光源,评价了各薄膜光催化降解亚甲基蓝的活性。UV-Vis测试结果表明,Ag的掺杂使TiO_2吸收边发生红移,有效增强可见光的吸收能力。PL测试结果表明,Ag能显著抑制光生电子(e-)和空穴(h+)的复合。T%光谱测试结果表明,Ag掺杂不影响TiO_2薄膜的可见光透过率。Ag的存在大幅度提高了TiO_2薄膜的亲水性以及对亚甲基蓝的光催化降解活性,当掺杂Ag的质量分数为1%时,TiO_2薄膜与水的接触角几乎为0°,同时可使TiO_2薄膜的光催化活性提高约1.5倍。A series of Ag-doped TiO2 thin films were synthesized using TiCl4 hydrolysis method. The thin films were characterized by X-ray diffraction（ XRD）,scanning electron microscopy（ SEM）,UV-Vis diffuse reflectance spectroscopy（ DRS）,photoluminescence（ PL）emission spectroscopy and visible light transmittance. Doping of Ag induces a red shift on the absorption edge of TiO2 thin film,which enhances the visible light absorption capability. Doping of Ag also effectively suppresses the recombination of photo-generated electron（ e^-）- hole（ h^＋） pairs,but it does not affect the visible light transmittance of TiO2 thin films. The effects of Ag doping level on the hydrophilicity of the films were investigated by contact goniometer. With the optimal doping level of 1 mass. % Ag,the contact angle between water and the film approaches zero. The photocatalytic decomposition of methylene blue on Ag-doped TiO2 surface was tested under the UV light（ 8 W,λ = 254 nm） irradiation. Again,for the doping level of 1 mass%,the Ag-doped TiO2 film shows a photocatalytic activity that is 1. 5 times better than the un-doped TiO2 baseline.

关 键 词：二氧化钛薄膜 银掺杂 亲水性 光催化 亚甲基蓝 

分 类 号：TG132.5[一般工业技术—材料科学与工程]