Highly selective photocatalytic and sensing properties of 2D-ordered dome films of nano titania and nano Ag2+ doped titania

被引：45

作者：

Jin, Shaofen ^{[1
]}

Li, Yuanzhi ^{[1
]}

Xie, Hao ^{[1
]}

Chen, Xiong ^{[1
]}

Tian, Tingting ^{[1
]}

Zhao, Xiujian ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 04期

基金：

美国国家科学基金会;

关键词：

TIO2; ADSORPTION; OXIDATION; SILVER; NANOCOMPOSITES; DEGRADATION; DIOXIDE; FABRICATION; DEFECTS; DRIVEN;

D O I：

10.1039/c1jm14216j

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：

Novel 2D-ordered dome films of nano titania (2D-TiO2) and nano Ag2+ doped titania (2D-Ag-TiO2) were prepared by RF magnetron sputtering method. The existence of oxygen vacancies or Ti3+ ions in the 2D-ordered dome films extends the absorption of TiO2 from UV region to visible region up to 530 nm. Doping of Ag2+ in the 2D-TiO2 film considerably enhance the visible light absorption of the 2D-Ag-TiO2 film. Remarkably, for the photodegradation of cationic crystal violet (CV) and anionic methyl orange (MO), the 2D-ordered dome films exhibit 100% photodegradation selectivity to cationic CV. The 2D-Ag-TiO2 film shows excellent selective photocatalytic durability and photostability without detectable photoreduction of Ag2+ ions after long time illumination. Furthermore, the 2D-ordered dome films exhibit unique ratiometric photoelectrochemical sensing property with 100% selectivity to the cationic CV. Ag2+ doping in the 2D-TiO2 film significantly improves the photocatalytic activity and photoelectrochemical sensitivity as it considerably enhances the charge transfer efficiency from excited dye to titania.

引用

页码：1469 / 1476

页数：8

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