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Hydrogenation and Ammoniation of SrTiO3 for an Enhanced Visible-light Photocatalysis
Tao Sun,You-yuan Zhao,Ming Lu*
Author NameAffiliationE-mail
Tao Sun Department of Optical Science and Engineering, Key Laboratory for Micro and Nano Photonic Struc-tures, Fudan University, Shanghai 200433, China  
You-yuan Zhao Department of Optical Science and Engineering, Key Laboratory for Micro and Nano Photonic Struc-tures, Fudan University, Shanghai 200433, China  
Ming Lu* Department of Optical Science and Engineering, Key Laboratory for Micro and Nano Photonic Struc-tures, Fudan University, Shanghai 200433, China minglu@fudan.ac.cn 
Abstract:
Hydrogenation and ammoniation of SrTiO3 (STO), a normal ultraviolet photocatalyst, were performed by annealing STO〈100〉in H2:N2=5%:95% and NH3, respectively, at various tem-peratures T. It was found that hydrogenation at T≥900 oC remarkably enhanced the UV photocatalytic ability of STO, but the visible-light photocatalysis was still unavailable, while ammoniation at T≥800 oC introduced the N doping, resulting in visible-light photocat-alytic 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 identifi-cations have been made to analyze these results.
Key words:  SrTiO3, Hydrogenation, Ammoniation, Photocatalysis, Synergetic effect
FundProject:
氢化和氨化对SrTiO3的可见光催化增强
孙涛,赵有源,陆明*
摘要:
对STO(SrTiO3)〈100〉晶片在多个温度下进行氢化和氨化.氢化和氨化分别在混合气体(H2:N2=5%:95%)和NH3气中退火进行.实验发现,当氢化温度≥900 oC时,STO的紫外光催化有显著增强,但仍不产生可见光催化;当氨化温度≥800 oC时,由于N掺杂将导致出现STO可见光催化.进一步研究发现,先氢化再氨化STO光催化能力几乎和单独氨化的STO相同;但是先氨化再氢化STO可见光催化将显著增强,即存在氢化和氨化的协同效应.
关键词:  SrTiO3,氢化,氨化,光催化,协同效应
DOI:10.1088/1674-0068/25/01/86-90
分类号: