Characterization and photocatalytic activity of lanthanon-doped nano-TiO<sub>2</sub>

Zhang Zong Wei; Fan Jun; Zhang Qian; Hu Xiao Yun; Li Zhen Dong; Chen Guo Liang

doi:10.1117/12.674344

9 June 2006 Characterization and photocatalytic activity of lanthanon-doped nano-TiO₂

Zhang Zong Wei, Fan Jun, Zhang Qian, Hu Xiao Yun, Li Zhen Dong, Chen Guo Liang

Proceedings Volume 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 614938 (2006) https://doi.org/10.1117/12.674344
Event: 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2005, Xian, China

Abstract

Nano-TiO₂ powder and TiO₂ optical films with photocatalytic activity were prepared by sol-gel progress. Eu³⁺,Nd³⁺,Tb³⁺,Dy³⁺ were adoped to enhance the photocatalytic activity. The modality of the films was observed with AFM morphology; Three-dimensional picture of TiO₂ by AFM (RMS=2.83nm) showed its fine quality. Samples annealed at different temperatures were analyzed with UV-VIS spectroscopy. The results indicated that the absorption of the sample annealed at 500^oC is strong because it is composed of anatase and rutile sized about 10~100nm (ref. XRD). XRD was used to analyze the structure of TiO₂. The results showed that rutile phase is precipitated as well as anatase of TiO₂,and anatase is about 66wt%,and the average dimension is 26nm; Alumina-supported vanadium oxide catalyst (V₂O₅/Al₂O₃) was prepared conventionally by impregnating alumina with an aqueous solution of ammonium metavanadate(NH₄VO₃). Cyclohexanol and cyclohexanone are key reactants for the production of adipic acid and caprolactam. The photo-oxidation of cyclohexane on titanium dioxide and over V₂O₅/Al₂O₃ was investigated in neat cyclohexane to synthesize cyclohexanone and cyclohexanol. The reaction also features the photocatalytic activity of Nano-TiO₂ and V₂O₅/Al₂O₃. The results indicate that titanium dioxide doped with Eu or Tb exhibits the high selectivity to partial oxidation compounds. The characteristic of the reaction over V₂O₅/Al₂O₃ is a reasonable (K/A) ketone/alcohol ratio.

Citation Download Citation

Zhang Zong Wei, Fan Jun, Zhang Qian, Hu Xiao Yun, Li Zhen Dong, and Chen Guo Liang "Characterization and photocatalytic activity of lanthanon-doped nano-TiO₂", Proc. SPIE 6149, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 614938 (9 June 2006); https://doi.org/10.1117/12.674344

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