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.
出处
《分子催化》
EI
CAS
CSCD
北大核心
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)
关键词
镧掺杂
二氧化钛薄膜
载体
光催化活性
Doped- La^3＋
Nanometer TiO2 thin films
Substrates
Photocatalytic activity
