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31.19

Hoá học

Sản sinh hydrogen bằng hiệu ứng điện quang hóa của quang điện cực TiO2 pha Cu

Hydrogen generation by photoelectrochemical effect of the Cu-doped TiO2 photoanode

Nanoscience and Nanotechnology

2014

3

1-5

2043-6262

TiO2 film photoanodes with a size of 1 x 1 cm2 were fabricated by a spin coating method. Cudoped TiO2 powder with various Cu concentrations (0.2, 0.4, 0.6 and 0.8 at percent) and surfactant were used as starting materials in coating Cu-doped TiO2 thin films onto FTO/glass substrate. Crystalline structure of TiO2 material, microstructure of the photoanode films and their thickness were identified by x-ray diffraction and Raman scattering. Hydrogen generation from water by photoelectrochemical effect in the visible light was observed by recording UV characteristics of the photoanode in dark and light regimes. The obtained results have shown that the hydrogen generation efficiency of photoanode nonlinearly depends on Cu concentration. The nonlinear dependence of the hydrogen generation efficiency may be due to a change of resistivity of the film photoanode that is related with the random distribution of the hetero-junction between interfaces of TiO2 and CuO nanoparticles.

TTKHCNQG, CLt 740