Studies on Photoelectrochemical Behavior and Surface Image of Electrodeposited Nanocrystalline TiO2 Films

Abstract

Abstract: The photoelectrochemical behavior and surface image of electrodeposited nanocrystalline TiO₂ films prepared under different conditions were studied by using photocurrent spectroscopy, transparent spectroscopy and scanning probe microscopy. The particle sizes of the nanocrystalline TiO₂ films electrodeposited from 0.05 mol/L TiCl ₃+Na₂CO₃(pH=2.2) and from 0.05 mol/L TiCl ₃+NaOH(pH=2.2) were about 50—100 nm. The photoelectrochemical behavior of the TiO₂ films was related to the surface structures. The TiO₂ film electrodeposited at 0.1 V_vs. SCEin 0.05 mol/L TiCl ³⁺NaOH(pH=2.2) was of better photoelectrochemical conversion efficiency. It was shown that the photoelectrochemical behavior of nanocrystalline TiO₂ films was different from those of compact semiconductor electrodes.

Key words: Electrodeposition, Nanocrystalline TiO₂ films, Photocurrent, Scanning probe microscope

CLC Number:

O646

TrendMD:

LUO Jin, ZHOU Jing, ZU Yan-Bing, LIN Zhong-Hua . Studies on Photoelectrochemical Behavior and Surface Image of Electrodeposited Nanocrystalline TiO₂ Films[J]. Chem. J. Chinese Universities, 1998, 19(9): 1484.

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Studies on Photoelectrochemical Behavior and Surface Image of Electrodeposited Nanocrystalline TiO₂ Films

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