Hydrogenation and Ammoniation of SrTiO3 for an Enhanced Visible-light Photocatalysis

作者：Sun Tao; Zhao You yuan; Lu Ming^*

来源：Chinese Journal of Chemical Physics, 2012, 25(1): 86-90.

DOI：10.1088/1674-0068/25/01/86-90

• SrTiO3
• Hydrogenation
• Ammoniation
• Photocatalysis
• Synergetic effect

Hydrogenation and ammoniation of SrTiO3 (STO), a normal ultraviolet photocatalyst, were performed by annealing STO < 100 > in H-2:N-2=5%:95% and NH3, respectively, at various temperatures T. It was found that hydrogenation at T >= 900 degrees C remarkably enhanced the UV photocatalytic ability of STO, but the visible-light photocatalysis was still unavailable, while ammoniation at T >= 800 degrees C introduced the N doping, resulting in visible-light photocatalytic activity. Furthermore, when a hydrogenated STO was subjected to ammoniation, the visible-light photocatalytic ability was nearly the same as that of the ammoniated one; but the hydrogenation of an ammoniated one significantly enhanced visible-light photocatalysis, indicating a synergetic effect of hydrogenation and ammoniation. Discussions and identifications have been made to analyze these results.

• 出版日期2012-2
• 单位复旦大学