An efficient visible-light active photocatalyst CuAlGaO4 for solar hydrogen production

作者：Biswas Soumya Kanti; Baeg Jin Ook^*; Kale Bharat B; Yadav Rajesh K; Moon Sang Jin; Kong Ki jeong; So Won Wook

来源：Catalysis Communications, 2011, 12(7): 651-654.

DOI：10.1016/j.catcom.2010.12.018

• Photocatalyst
• CuAlGaO4
• Visible-light-active
• H2S photodecomposition
• H-2

Herein, for the first time, CuAlGaO4 is demonstrated as an efficient visible-light-active (band-gap of 1.87 eV, lambda >= 420 nm) photocatalyst for solar H-2 production. The CuAlGaO4 prepared by solid-state method is capable of producing 3214 mu mol of H-2 per hour from H2S photodecomposition under visible-light irradiation with quantum yield of 10.8% at 550 nm. Loading with 1 wt.% NiO enhances the rate of H-2 generation of the photocatalyst to 3616 mu molh(-1) with quantum yield of 12.7% at 550 nm. The CuAlGaO4 exhibits a spinel structure with particle size varying from a few nanometers to a few micrometers. The regenerated catalysts validate the stability and the reusability.

• 出版日期2011-3-10