摘要
用溶胶-凝胶法制备了一系列不同Fe3+掺杂量(ω0.00%~3.00%)的纳米TiO2光催化剂,利用TEM,XRD,UV-Vis等技术对其形貌和结构进行了表征.以亚甲基蓝(MB)的脱色降解为模型,研究了在自然光条件下Fe3+掺杂量对其光催化活性的影响.结果表明,在所研究的掺杂范围内,该纳米粒子的粒径随Fe3+掺杂量的增加呈减小趋势;Fe3+的掺入不仅可以控制TiO2由锐钛矿向金红石的转变,而且可以使该纳米微粒对光的吸收向可见区拓展;Fe3+的适量掺入,可以显著提高纳米TiO2在自然光条件下的催化活性.
Fe^3＋-doped TiO2 composite nanoparticles with different doping amount （ω： 0.00- 3.00%） are successfully synthesized using sol-gel method and characterized by XRD, TEM, and UV-Vis diffuse reflectance spectra（DRS）. Being a model reaction, the photocatalytic degradation of methylene blue is investigated in TiO2. The influence of amounts of Fe^3＋ -doped on photocatalytic activities is investigated under visible light irradiation. The results show that the size of Fe^3＋/TIO2 particles decrease with the increase of the amount of Fe^3＋ and their absorption spectra are broaden and absorption intensities are also increased. Doping Fe^3＋ can control the conversion of TiO2 from anatase to rutile. The doping amount of Fe^3＋ remarkably affects the activity of catalyst, and the optimum efficiency occurs at 0.3%. The appropriate doping Fe^3＋ can markly increase the catalytic activity of TiO2 under visibe light irradiation.
出处
《西北师范大学学报（自然科学版）》
CAS
2006年第6期52-55,64,共5页
Journal of Northwest Normal University(Natural Science)
基金
甘肃省自然科学基金资助项目(3ZS041-A25-034)
