Time-resolved infrared spectroscopic investigation of roles of valence states of Cr in (La,Cr)-doped SrTiO3 photocatalysts
Time-resolved infrared spectroscopic investigation of roles of valence states of Cr in (La,Cr)-doped SrTiO3 photocatalysts
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时间分辨红外光谱研究 Cr 价态在 (La,Cr) 掺杂 SrTiO3 光催化剂中的作用
DOI:
10.1016/s1872-2067(12)60702-5
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发表时间:
2013-11
影响因子:
16.5
通讯作者:
Li Can
中科院分区:
文献类型:
--
作者:
Shen Shuai;Jia Yushuai;Fan Fengtao;Feng Zhaochi;Li Can
The kinetics of photogenerated electrons in SrTiO3(La,Cr) pretreated with either H2or O2were studied using time-resolved infrared spectroscopy. The X-ray photoelectron and Raman spectra showed that the Cr cations in the sample reduced with H2were all in Cr3+, whereas those oxidized with O2were in mixed of Cr3+and Cr6+. Electrons excited with 355 and 532 nm light pulses showed the absorption of mid-IR light, and this was traced as a function of the time delay in a microsecond domain. The time-resolved results revealed that the decay rate of the photoinduced electrons with Cr3+was slower than that with Cr6+, implying that trivalent Cr contributed more to retarding recombination of photoinduced electrons and holes, and enhanced photocatalytic H2production activity.
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DOI:
10.1021/la049590v
发表时间:
2004-07
期刊:
Langmuir : the ACS journal of surfaces and colloids
影响因子:
--
作者:
T. V. Malleswara Rao;G. Deo;J. Jehng;I. Wachs
通讯作者:
T. V. Malleswara Rao;G. Deo;J. Jehng;I. Wachs
DOI:
10.1039/b502147b
发表时间:
2005-05
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
Ryo Niishiro;H. Kato;A. Kudo
通讯作者:
Ryo Niishiro;H. Kato;A. Kudo
影响因子:
3.3
作者:
Akira Yamakata;A. Ishibashi;H. Onishi
通讯作者:
Akira Yamakata;A. Ishibashi;H. Onishi
影响因子:
3.7
作者:
Inaba, J;Katsufuji, T
通讯作者:
Katsufuji, T
影响因子:
3.3
作者:
Liu, J. W.;Chen, G.;Zhang, Z. G.
通讯作者:
Zhang, Z. G.