Capturing local structure modulations of photoexcited BiVO4 by ultrafast transient XAFS

被引：22

作者：

Uemura, Yohei ^{[1
]}

Kido, Daiki ^{[2
]}

Koide, Akihiro ^{[1
]}

Wakisaka, Yuki ^{[2
]}

Niwa, Yasuhiro ^{[3
]}

Nozawa, Shunsuke ^{[3
]}

Ichiyanagi, Kohei ^{[3
]}

Fukaya, Ryo ^{[3
]}

Adachi, Shin-ichi ^{[3
]}

Katayama, Tetsuo ^{[4
]}

Togashi, Tadashi ^{[4
]}

Owada, Shigeki ^{[5
]}

Yabashi, Makina ^{[5
]}

Hatada, Keisuke ^{[6
]}

Iwase, Akihide ^{[7
]}

Kudo, Akihiko ^{[7
]}

Takakusagi, Satoru ^{[2
]}

Yokoyama, Toshihiko ^{[1
]}

Asakura, Kiyotaka ^{[2
]}

机构：

[1] Inst Mol Sci, Myodaiji Cho, Okazaki, Aichi 4448585, Japan

[2] Hokkaido Univ, Inst Catalysis, Sapporo, Hokkaido 0010021, Japan

[3] KEK Tsukuba, IMSS, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[4] JASRI, KoutoSayo Cho, Sayo, Hyogo 6795198, Japan

[5] RIKEN SPring 8 Ctr, KoutoSayo Cho, Sayo, Hyogo 6795148, Japan

[6] Univ Munich, Dept Chem, Phys Chem, Butenandstr 5-13, D-81377 Munich, Germany

[7] Tokyo Univ Sci, Dept Appl Chem, Fac Sci, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan

来源：

CHEMICAL COMMUNICATIONS | 2017年 / 53卷 / 53期

关键词：

X-RAY-ABSORPTION; ELECTRONIC-STRUCTURE; CARRIER DYNAMICS; FEMTOSECOND;

D O I：

10.1039/c7cc02201h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ultrafast excitation of photocatalytically active BiVO4 was characterized by femto-and picosecond transient X-ray absorption fine structure spectroscopy. An initial photoexcited state (<<500 fs) changed to a metastable state accompanied by a structural change with a time constant of similar to 14 ps. The structural change might stabilize holes on oxygen atoms since the interaction between Bi and O increases.

引用

页码：7314 / 7317

页数：4

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