离子掺杂与载体类型交互效应对纳米TiO_2薄膜光活性改性研究  

The Research on Interaction Effect between Ion-doped and Substrates on the Photocatalytic Activity of Nanometer TiO_(2) thin Film

作　　者：单志强[1] 王晓林[2] 沈笑君[1] 

机构地区：[1]黑龙江科技学院资源与环境学院,黑龙江哈尔滨150027 [2]广西大学资源环境学院,广西南宁530004

出　　处：《分子催化》2006年第1期62-66,共5页Journal of Molecular Catalysis(China)

基　　金：黑龙江科技学院青年科学基金项目(04-29)

摘　　要：采用溶胶-凝胶法在六种不同基体材料上制备了掺杂La3+的TiO2纳米复合材料.利用扫描电子显微镜(SEM),x射线衍射(XRD)及紫外-可见吸收光谱对其TiO2薄膜的TiO2颗粒形态和相组成进行了详细研究,并以甲基橙为模拟对象,研究了不同浓度的La3+掺杂对催化剂光活性的影响,结果表明:脱色率(η%)随载体、掺杂浓度不同而变.不锈钢载体掺杂浓度为0.604×1021/cm3La3+的二氧化钛薄膜对甲基橙有最高的降解效率,陶瓷载体掺杂0.604×1017/cm3La3+的降解效率最高,玻璃载体最佳La3+掺杂浓度为6.04×1017/cm3,而钛片载体最佳La3+掺杂浓度为0.604×1023/cm3.Nanometer TiO2 composite materials doped La^3＋ , which deposited on the surface of six kinds of substrates , were prepared by Sol-Gel method. A thorough study on the morphology and phase composition of TiO2 film were conducted through scanning electron microcopy , X-ray diffraction and ultraviolet-visual absorption spectrum. Meanwhile, the effects of the La^3＋ concentration of various levels on the activity of the TiO2 catalysts were studied with methyl orange as the simulation object. The results showed that the degradation rate（η% ） is dependent with the doping concentration and substrates. When the optimum concentration of La^3＋ is 0. 604 × 10^21 La^3＋/cm^3 on Stainless steel substrates, 0. 604 ×10^17/cm^3 on the the degradation rate of the TiO2 ceramic, 6.04 ×10^17/cm^3 on film is the largest, but the optimum concentration is glass and 0. 604 × 10^23/cm^3 on the Titanium slices respectively.

关 键 词：镧掺杂 二氧化钛薄膜 载体 光催化活性 

分 类 号：O643.32[理学—物理化学]