Photoexcited charge carrier dynamics of interconnected TiO2 nanoparticles: evidence of enhancement of charge separation at anatase-rutile particle interfaces

被引：35

作者：

Shingai, Daiki ^{[1
]}

Ide, Yusuke ^{[2
]}

Sohn, Woon Yong ^{[1
]}

Katayama, Kenji ^{[1
,3
]}

机构：

[1] Chuo Univ, Fac Sci & Technol, Dept Appl Chem, Bunkyo Ku, 1-13-27 Kasuga, Tokyo 1128551, Japan

[2] Natl Inst Mat Sci NIMS, MANA, Int Ctr Mat Nanoarchitecton, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[3] PRESTO, JST, 4-1-8 Honcho, Kawaguchi, Saitama 3320012, Japan

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2018年 / 20卷 / 05期

关键词：

PHOTOCATALYTIC ACTIVITY; SINGLE-CRYSTALS; SOLAR-CELLS; PERFORMANCE; LAYERS; PHASE; OXIDE;

D O I：

10.1039/c7cp07563d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The charge carrier kinetics of hydrothermally treated TiO2 nanoparticles, consisting of interconnected anatase and rutile crystallographic forms, was investigated using a heterodyne transient grating technique to obtain direct evidence of the enhancement of charge separation efficiency. We found that surface recombination arising from trapped electrons was retarded, compared with that of P25 TiO2 nanoparticles, with the aid of an increase of particle interfaces. This means that the charge separation efficiency of hydrothermally treated TiO2 nanoparticles is higher than that of P25 TiO2 nanoparticles, to which the enhanced photocatalytic performance of the hydrothermally treated TiO2 nanoparticles could be attributed.

引用

页码：3484 / 3489

页数：6

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