Ag K- and L3-edge XAFS study on Ag species in Ag/Ga2O3 photocatalysts

被引：13

作者：

Yamamoto, M. ^{[1
]}

Yoshida, T. ^{[2
,3
]}

Yamamoto, N. ^{[1
]}

Nomoto, T. ^{[4
]}

Yamamoto, A. ^{[5
,6
]}

Yoshida, H. ^{[5
,6
]}

Yagi, S. ^{[3
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan

[2] Osaka City Univ, Adv Res Inst Nat Sci & Technol, Osaka 5588585, Japan

[3] Nagoya Univ, EcoTopia Sci Inst, Nagoya, Aichi 4648603, Japan

[4] Aichi Synchrotron Radiat Ctr, Seto 4890965, Japan

[5] Kyoto Univ, Grad Sch Human & Environm Studies, Kyoto 6068501, Japan

[6] Kyoto Univ, ESICB, Kyoto 6158520, Japan

来源：

16TH INTERNATIONAL CONFERENCE ON X-RAY ABSORPTION FINE STRUCTURE (XAFS16) | 2016年 / 712卷

关键词：

NEAR-EDGE-STRUCTURE; CHARGE REDISTRIBUTION; CO2; REDUCTION; AU; EVOLUTION; XANES; WATER; TIO2;

D O I：

10.1088/1742-6596/712/1/012074

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Ag loaded Ga2O3 (Ag/Ga(2)O3) shows photocatalytic activity for reduction of CO2 with water. Ag L-3-edge XANES and K-edge EXAFS spectra were measured for various Ag/Ga2O3 samples, which suggested that structural and chemical states of Ag species varied with the loading amount of Ag and the preparation method. The Ag species were metallic Ag particles with an AgGaO2-like interface structure in the sample with high loading amount of Ag while predominantly Ag metal clusters in the sample with low loading amount of Ag. The XANES feature just above the edge represented the interaction between the Ag species and the Ga2O3 surface, showing that the Ag metal clusters had more electrons in the d-orbitals by interacting with the Ga2O3 surface, which would contribute the high photocatalytic activity.

引用

页数：4

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