掺铈氧化钛薄膜光吸收性能的研究

王俊哲; 郝强; 金芳洲; 何岩; 江洪湖; 范海波; 姚合宝

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掺铈氧化钛薄膜光吸收性能的研究

1.
西北大学物理学系,陕西西安710069

详细信息

通讯作者:
王俊哲(1986-)，男，陕西韩城人，硕士研究生，主要从事TiO2纳米薄膜光催化性能的研究工作。

中图分类号: O484.4
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出版历程
- 刊出日期: 2011-01-15

AAbsorption spectra of TiO2 films doped with cerium

1.
Department of Physics,Northwest University,Xi’an 710069,China

摘要

摘要: 利用射频磁控溅射法制备出TiO2薄膜及不同掺Ce比的TiO2薄膜。用紫外-可见分光光度计对薄膜的透过率做了测定，结果显示在一定掺杂范围内随着掺Ce量的增加，薄膜的光学吸收边出现红移。计算发现通过CeO2的掺杂，氧化钛薄膜禁带宽度Eg由3.40eV减小至2.73eV，从而使吸收边由366nm红移至455nm处，增强了对可见光的吸收，这与CeO2在TiO2导带与价带间引入杂质能级有关。
- TiO2薄膜 /
- 禁带宽度 /
- Ce /
- 红移
Abstract: Different kinds of Ce-TiO2 films were fabricated by radio frequency reactive magnetron sputtering. Based on the transmittance spectra measured by UVVis spectrophotometer, it was found that optical absorption band exhibited a red shift with the increase of Ce/Ti doping ratio. Calculation results indicates the band gap energy (Eg) decreases from 3.40eV to 2.73eV with the absorption band shift from 366nm to 455nm, which results in more absorption of visual light. The impurity energy level Ce 4f plays an important role in the absorption of visual light.
- TiO2 film /
- band gap energy /
- cerium /
- red shift

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参考文献(1)

［1］LIU Chao,TANG Xin-hu,MO Ce-hui,et al.Chara-cterization and activity of visible-light-driven TiO2 photocatalyst codoped with nitrogen and cerium［J］.Solid State Chemistry, 2008,181(2):913-919.［2］LI F B, LI X Z, HOU M F, et al. Enhanced photo-catalytic activity of Ce3+-TiO2 for 2-mercaptobenzo-thiazole degradation in aqueous suspension for odour control［J］. Applied Catalysis, 2005,285(3):181-189.［3］XU Yue-hua, CHEN Huo-rong, ZENG Zhuo-xian, et al. Investigation on mechanism of photocatalytic activity enhancement of nanometer cerium-doped titania［J］. Surface Science, 2006,252(1):8565-8570.［4］LI Guang-qin, LIU Chun-yan, LIU Yun. Different effects of cerium ions doping on properties of anatase and rutile TiO2［J］. Surface Science, 2006,253(6):2481-2486.［5］XU An-wu, GAO Yuan, LIU Han-qin. The prepa-ration, characterization, and their photocatalytic activities of rare-earth-doped TiO2 nanoparticles［J］. Journal of Catalysis, 2002,207(4):151-157.［6］杨宗棉.固体导论［M］.上海:上海交通大学出版社, 1993:79.YANG Zong-mian. Solid introduction［M］. Shanghai: Shanghai Jiaotong University Press, 1993: 79. (in Chinese)［7］WANG Chao, AO Yanhui, WANG Pei-fang, et al. Preparation, characterization, photocatalytic proper-ties of titania hollow sphere doped with cerium［J］. Journal of Hazardous Materials, 2010,178(1):517-521.

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