Is Photooxidation Activity of {001} Facets Truly Lower Than That of {101} Facets for Anatase TiO2 Crystals?

被引：87

作者：

Wu, Qian ^{[1
,2
]}

Liu, Min ^{[1
]}

Wu, Zhijiao ^{[1
]}

Li, Yongliang ^{[2
]}

Piao, Lingyu ^{[1
]}

机构：

[1] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

[2] Beijing Normal Univ, Analyt & Testing Ctr, Beijing 100875, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 51期

关键词：

MESOPOROUS TITANIA; NANOCRYSTALS; PHOTOCATALYSIS; PERCENTAGE; NANOSHEETS; PARTICLES; WATER; ZNO;

D O I：

10.1021/jp3087495

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 effect of particle size and active surfaces on photoreactivity of TiO2 crystals is investigated in this report. The clarification of highly active surfaces is the key to understanding the photoreactivity of anatase TiO2 crystal and also to morphological control of photocatalysts with well-defined crystal facets. The anatase TiO2 single crystals with different percentage of {001} facets in uniform size, as well as anatase TiO2 single crystals with different particles size in same percentage of {001} facets, are synthesized by carefully controlling the synthesis parameters. Their photooxiation reactivity results indicate that the underlying dominant factor for photooxidation activity of anatase TiO2 crystals is particle size. The photocuddation activity of {001} facets is greater than that of {101} facets when the crystals size of anatase TiO2 is identical. This work would be beneficial for better understanding the different photocatalytic performance of different facets of metal oxide crystals in photoreactivity processes.

引用

页码：26800 / 26804

页数：5

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