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Citation: Qiu Jian-Bin, Cao Ya-An, Ma Ying, Guan Zi-Sheng, Yao Jian-Nian. Effect of Substrates of Photocatalytic Activity of TiO₂ Films[J]. Acta Physico-Chimica Sinica, ;2000, 16(01): 1-4. doi: 10.3866/PKU.WHXB20000101 shu

Effect of Substrates of Photocatalytic Activity of TiO₂ Films

1.
Centre for Molecular Science,Institute of Chemistry,Chinese Academy of Science,Beijing 100080

Received Date: 14 September 1999
Available Online: 15 January 2000

TiO_2 nanocrystalline films were prepared on glass, ITO and p-Si substrates. Degradation of Rhodamine B was used to assess the photocatalytic activity of the films. It was found that photocatalytic activity of TiO2 films on ITO and p-Si are higher than that on glass, and the film grown on ITO is the best. In addition, crystalline phases and surface morphology of TiO_2films were also affected by different substrates. Surface Photovoltage Spectra was used to analyze surface states and energy levels of the films. Separation of photogenerate electrons and holes was promoted due to matching of the energy levels between TiO_2 films and ITO as well as p-Si. High photocatalytic activity was then obtained because more photogenerate electrons and holes took part in photocatalytic reaction on TiO_2 surfaces.
- TiO2 films,
- Substrates,
- Photocatalysis,
- Surface photovoltge spectra(sPS)
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沈阳化工大学材料科学与工程学院沈阳 110142

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Effect of Substrates of Photocatalytic Activity of TiO₂ Films