Hierarchical N- Doped TiO2 Microspheres with Exposed (001) Facets for Enhanced Visible Light Catalysis

被引：28

作者：

Li, Zhongtao ^{[1
,2
]}

Ren, Zhiyu ^{[1
,2
]}

Qu, Yang ^{[1
,2
]}

Du, Shichao ^{[1
,2
]}

Wu, Jun ^{[1
,2
]}

Kong, Lingjun ^{[1
,2
]}

Tian, Guohui ^{[1
,2
]}

Zhou, Wei ^{[1
,2
]}

Fu, Honggang ^{[1
]}

机构：

[1] Heilongjiang Univ, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China

[2] Heilongjiang Univ, Sch Chem & Mat Sci, Harbin 150080, Peoples R China

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2014年 / 2014卷 / 12期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

Crystal engineering; Titanium; Surface chemistry; Phase transitions; Doping; Surface analysis; Photochemistry; ANATASE TIO2; SINGLE-CRYSTALS; SURFACE; NANOSHEETS; PHOTOCATALYST; NANOMATERIALS; PERCENTAGE; PHASE;

D O I：

10.1002/ejic.201301561

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Hierarchical N-doped TiO2 microspheres with exposed (001) facets [N-TiO2-(001)] were synthesized through a simple, fluorine-free solvothermal reaction with subsequent thermal treatment. The results show that the hierarchical N-TiO2-(001) microspheres are made up of numerous TiO2 nanosheets, and that isopropylamine (IPAN) acts as both the nitrogen source and the capping and shape-controlling agent that generates the high-energy (001) facets. In addition, IPAN is also effective in increasing the onset temperature of the phase transformation of TiO2 from anatase to rutile. Compared with the commercially available P25 TiO2, the as-prepared TiO2 microspheres exhibit good photocatalytic activity and high stability under visible-light irradiation. The high photocatalytic performance is derived from the synergy effect of N-doping and the separation of photogenerated electrons and holes among different facets, as evidenced by surface photovoltage spectroscopy.

引用

页码：2146 / 2152

页数：7

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