CdIn2O4 is an attractive semiconductor photocatalyst for water splitting due to its small band gap and high stability during irradiation.  Powders and thin films were synthesized using a sol-gel pyrolysis method, then characterized and evaluated for water splitting activity.  Carbon doping was found to enhance both the photoelectrochemical and hydrogen evolution properties of the material.  The photoelectrochemical performance of C-doped CdIn2O4 was optimized with respect to several synthetic parameters and determined to be at least three-fold greater than either CdO or In2O3 electrodes.  Platinum was loaded on the powdered material surface to enhance hydrogen generation which was measured under UV-visible and visible light irradiation only.  Compared to platinized TiO2 in methanol, C-CdIn2O4 showed a 4-fold increase in hydrogen production.  Quantum efficiency of the material for water splitting was found to be 8.7 % at 420-440 nm.  The present work shows that CdIn2O4 is a promising photocatalyst for solar hydrogen conversion.

Efficient solar hydrogen conversion by carbon doped cadmium indate photocatalysts

243rd National Meeting (2012)

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