Primary Discussion About the Effect of Surface Modification on SiC on Photocatalytic Hydrogen Evolution from Water

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Abstract A kind of green SiC micropowder,as a potential photocatalyst,was pretreated and NiO was loaded by impregrating method.The effects of pretreatment and the loading of NiO on SiC on the photocatalytic activity of SiC to produce hydrogen from water under visible illumination were discussed.The results showed that SiO_2 on the surface of green SiC suppressed the water spitting.Etching in HF aqueous solution to remove SiO_2 could lead to a remarkable increase in the photocatalytic activity of SiC.Loading of NiO could accelerate the hydrogen generation,which may be attributed to the charge separation and the adsorption of H~+ on SiC surface,and at each optimal pH value,the ability of these three catalysts to produce H_2 was 2%NiO/SiC>1%NiO/SiC>SiC.

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Received 2008-11-15; published 2008-11-15

Cite this article:

GAO Yan-ting,WANG Ya-quan,WANG Yu-xiao.Primary Discussion About the Effect of Surface Modification on SiC on Photocatalytic Hydrogen Evolution from Water[J] Chemcial Industry and Engineering, 2008,V25(6): 512-514

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