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材料研究学报  2012, Vol. 26 Issue (6): 661-666    
  研究论文 本期目录 | 过刊浏览 |
铁、碘共掺杂TiO2纳米晶的制备和光催化性能
苗挂帅1, 马兴平1, 王蓓1, 张华荣1,2
1.河南大学物理与电子学院 开封 475004
2.河南大学微系统物理研究所 开封 475004
Preparation and Photocatalytic Properties of Fe–I–codoped TiO2 Nanocrystalline
MIAO Guashuai1,  MA Xingping1,  WANG Bei1,  ZHANG Huarong1,2
1.School of Physics & Electronics, Henan University, Kaifeng 475004
2.Institute of Microsystemic Physics, Henan University, Kaifeng 475004
引用本文:

苗挂帅 马兴平 王蓓 张华荣. 铁、碘共掺杂TiO2纳米晶的制备和光催化性能[J]. 材料研究学报, 2012, 26(6): 661-666.
MIAO Guashuai MA Xingping WANG Bei ZHANG Huarong. Preparation and Photocatalytic Properties of Fe–I–codoped TiO2 Nanocrystalline[J]. Chinese Journal of Materials Research, 2012, 26(6): 661-666.

全文: PDF(991 KB)  
摘要: 

采用溶胶--凝胶法制备铁、碘单掺杂及共掺杂的纳米晶TiO2光催化剂, 用X射线衍射(XRD)、X射线光电子能谱(XPS)和紫外可见(UV--vis)漫反射光谱对其进行表征, 研究了其降解亚甲基蓝的光催化性能。结果表明, 催化剂样品为锐钛矿相, 平均粒径为7--15 nm。掺杂使样品的光吸收性能显著改善。掺杂I引起样品的晶粒尺寸减小和光吸收范围的拓展, 导致其光催化活性显著提高;对于共掺杂样品, 随着Fe掺杂量的增加, 其光催化活性呈现先增加后减小的变化趋势, 掺杂量为0.2%的光催化性能最好。根据Fe引入后样品晶粒尺寸、光吸收性能及能带结构等因素的变化, 对其光催化性能变化的机制进行了讨论。

关键词 无机非金属材料铁、碘共掺杂纳米晶TiO2亚甲基蓝光催化活性    
Abstract

Iron and iodine single doped and co-doped TiO2 nanocrystalline were prepared by the sol–gel method and investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy, respectively. The photocatalytic properties of the samples were evaluated by photocatalytic degrading methylene blue. The results show that all the samples are compose of the anatase phase and the average grain size is 7–15 nm. After the doping, the absorption properties of the samples obviously enhanced. After introducing I into TiO2, the photocatalytic activity of the sample is greatly improved due to the decrease of grain size and extending of optical absorption region. With the increase of Fe doping level, the photocatalytic activities of the codoped samples increase and then decrease gradually. The best photocatalytic property is presented in the codoped sample with 0.2% Fe doping. The mechanisms of the photocatalytic property changes were further discussed by several factors such as grain size, absorption performance and band structure.

Key wordsinorganic non-metallic materials    Fe-I-codoped    nanocrystalline TiO2    methylene blue    photocatalytic activity
收稿日期: 2012-10-08     
ZTFLH:  TB321  
基金资助:

河南省科技厅科技攻关122102210229和河南大学省部共建SBGJ090505资助项目。

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