Fe^(3+)和La^(3+)共掺杂纳米TiO_2的制备及光催化性能的研究  

Study on preparation of Fe^(3+) and La^(3+) co-doped nano-TiO_2 and the photocatalytic activity

作　　者：程绪帮[1] 王振华[1] 刘保江[1] 何瑾馨[1,2] 

机构地区：[1]东华大学化学化工与生物工程学院,上海201620 [2]纺织面料技术教育部重点实验室,上海201620

出　　处：《印染助剂》2011年第1期25-28,共4页Textile Auxiliaries

摘　　要：通过溶胶凝胶法制备掺杂铁和镧的纳米TiO2,并以活性红15为目标降解物,研究了其光催化性能.采用热失重分析(TG)、X射线衍射(XRD)、电镜、紫外-可见漫反射光谱(DRS)等测试手段对TiO2的结构、晶型、光吸收范围等进行了表征.结果表明:共掺杂的纳米TiO2在500℃煅烧3 h呈现锐钛矿型,晶粒尺寸约15 nm;掺杂铁和镧的纳米TiO2吸收带会发生红移,拓展了其对光谱响应范围.通过光催化降解模拟试验,发现掺杂铁和镧的纳米TiO2粉末对活性红15溶液的降解率最高达到98.9%,具有较高的光催化活性.Fe3＋ and La3＋ co-doped nano-TiO2 was prepared by sol-gel method.The photocatalytic activity was investigated using C.I.Reactive Red 15 as target degradation product.The structure,crystal type and photoabsorption range of TiO2 were characterized by thermogravimetric analysis（TG）,X-ray diffraction（XRD）,electronic microscopy and UV-vis diffuse reflectance spectra（DRS）.The results showed that the co-doped TiO2 presented anatase crystal form with about 15 nm of grain size when it was calcined at 500 ℃ for 3 h.The absorption band of Fe3＋-La3＋/TiO2 occurred red shift,which expanded the scope of its spectral response.Through the photocatalysis degradation simulation experiments,it was found that the degradation rate of co-doped TiO2 for Reactive Red 15 reached 98.9%,which had high photocatalytic activity.

关 键 词：溶胶-凝胶法 Fe3+-La3+共掺杂纳米TiO2 光催化活性 

分 类 号：TQ314.11[化学工程—高聚物工业]