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

Tóm tắt

TiO2 film photoanodes with a size of 1 × 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%) 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 I/V 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.

Từ khoá

TiO2, photoelectrochemical effect, hydrogen generation

Tài liệu tham khảo

[1] Fujishima A and Honda K 1972 Nature 238 37
[2] Chusuei C C, Lai X, Davis K A, Bowers E K, Fackler J P and Goodman D W 2001 Langmuir 17 4113
[3] Fujishima A, Kohayakawa K and Honda K 1975 J. Electrochem. Soc. 122 1487
[4] Grätzel M 2005 Chem. Lett. 34 8
[5] Nguyen V H and Nguyen B H 2012 Adv. Nat. Sci.: Nanosci. Nanotechnol. 3 023001
[6] Asahi R, Morikawa T, Ohwaki T, Aoki K and Taga Y 2001 Science 293 269
[7] Tachikawa T, Fujitsuka M and Majima T 2007 J. Phys. Chem.
C 111 5259
[8] Shaban Y A and Khan S U M 2008 Int. J. Hydrog. Energy 33 1118
[9] Khan S U M, Al-Shahry M and Ingler W B J 2002 Science 297 2243
[10] Xu S, Ng J, Zhang X, Bai H and Sun D D 2010 Int. J. Hydrog. Energy 35 5254
[11] Ly N T et al 2012 Adv. Nat. Sci.: Nanosci. Nanotechnol. 3 045009
[12] Dhanalakshmi K B, Latha S, Anandan S and Maruthamuthu P 2001 Int. J. Hydrog. Energy 26 669e74
[13] Choi H J and Kang M 2007 Int. J. Hydrog. Energy 32 3841e8