Tunable Photocatalytic Selectivity of Hollow TiO2 Microspheres Composed of Anatase Polyhedra with Exposed {001} Facets

被引：995

作者：

Liu, Shengwei ^{[1
]}

Yu, Jiaguo ^{[1
]}

Jaroniec, Mietek ^{[2
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Kent State Univ, Dept Chem, Kent, OH 44242 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 34期

关键词：

SELF-TRANSFORMATION; TITANIUM-DIOXIDE; HIGH PERCENTAGE; NANOSHEETS; DEGRADATION; WATER;

D O I：

10.1021/ja105283s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A fluoride mediated self-transformation method is proposed for the synthesis of hollow TiO2 microspheres (HTS) composed of anatase polyhedra with exposed ca. 20% {001} facets. Importantly, HTS exhibit tunable photocatalytic selectivity in decomposing azo dyes in water. The fluorinated HTS show preferential decomposition of methyl orange (MO) in comparison to methylene blue (MB). In contrast, the surface-modified HTS by either NaOH washing or calcinations at 600 degrees C favor decomposition of MB over MO. The surface chemistry and the surface structure at the atomic level are key factors in tuning the adsorption selectivity and, consequently, photocatalytic selectivity of HTS toward azo dyes.

引用

页码：11914 / 11916

页数：3

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