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采用自组装方法于低温液相反应体系中成功制备出大尺寸二维纳米二氧化钛薄膜和掺铁二氧化钛薄膜。样品通过荧光发射光谱、拉曼光谱、高分辨透射电镜等方法进行表征,并研究了紫外光和可见光下Fe3+/TiO2纳米薄膜对甲基橙溶液(MO)的光催化降解过程,探讨了Fe3+对TiO2的光催化活性的影响。结果表明,此方法不需要高温煅烧即可得到高催化活性的金红石和锐钛矿混合型二氧化钛薄膜,以金红石为主。Fe3+掺杂明显提高了TiO2对甲基橙溶液的光催化降解效率:掺杂Fe3+浓度为0.5 mmol/L时光催化效果最优,且更利于较低浓度甲基橙溶液的降解,在紫外光和可见光下对初始浓度5 mg/L甲基橙溶液的降解率分别达到98.62%和89.24%。
Large-size two-dimensional nano-sized titanium dioxide thin films and iron-doped titanium dioxide thin films were successfully prepared by self-assembly method in low temperature liquid-phase reaction system. The samples were characterized by fluorescence emission spectroscopy, Raman spectroscopy, high resolution transmission electron microscopy and other methods. The photocatalytic degradation of methyl orange solution (MO) by Fe3 + / TiO2 nanofilms in UV and visible light was studied. The effects of Fe3 + Effect of TiO2 photocatalytic activity. The results show that this method does not require calcination at high temperature to obtain high catalytic activity of rutile and anatase mixed titania films, mainly rutile. Fe3 + doping significantly enhanced the photocatalytic degradation efficiency of TiO2 on methyl orange solution: the best photocatalytic activity was obtained when the concentration of Fe3 + was 0.5 mmol / L, and it was more conducive to the degradation of methyl orange solution at lower concentration. Under UV and Under the visible light, the degradation rate of methyl orange solution with the initial concentration of 5 mg / L reached 98.62% and 89.24% respectively.