Fe^(3+)掺杂TiO_2溶胶的低温制备及其光催化性能  

Study on the Photocatalytic Activity of Fe^(3+)-doped TiO_2 Synthesized at Low Temperature

作　　者：汪洋[1] 樊新民[1] 魏小飞[1] 洪洋[1] 

机构地区：[1]南京理工大学材料科学与工程学院,南京210094

出　　处：《硅酸盐通报》2012年第1期37-41,共5页Bulletin of the Chinese Ceramic Society

摘　　要：采用溶胶-凝胶法在低温下制备出Fe3+掺杂TiO2(Fe3+/TiO2)溶胶,研究Fe3+掺杂对TiO2催化性能的影响,用TG/DTA技术分析TiO2粉末的热分解过程,用XRD、TEM等表征Fe3+掺杂对TiO2晶型、晶粒尺寸、晶粒形貌的影响,结果表明:Fe3+掺杂会对纳米TiO2晶粒的粒径及晶体形貌产生影响,抑制TiO2晶型由锐钛矿向金红石的转变。将亚甲基蓝作为目标污染物进行光催化降解试验,紫外-可见漫反射吸收光谱分析表明:经适量Fe3+掺杂后的TiO2溶胶光催化活性提高,当硝酸铁与钛酸丁酯的物质的量比为0.20%时,光催化活性最佳。The Fe3＋-doped titania sol were synthesized at low temperature by sol-gel method.Effect of catalytic properties of titania by doping ferric iron was investigated.The heat decomposition of titania powder was analyzed by means of TG/DTA.Effects of doping ferric iron on crystal form,grain size and grain morphology of titania were characterized by XRD and TEM.The results show that doping ferric iron could prohibit crystal transformation from anatase to rutile,change the grain size and morphology.Using methylene blue as the objective contamination to make a photocatalytic degradation experiment,and the results of UV-Vis diffuse reflection spectra indicate that the titania sol with Fe3＋ doping has better photo-catalysis than the pure one and when the molar ration is 0.20%,the effect is best.

关 键 词：Fe3+掺杂 TIO2溶胶 溶胶-凝胶 低温制备 光催化 

分 类 号：O648[理学—物理化学]