10BaF2:NaF,Na3AlF6/TiO2 composite as a novel visible-light-driven photocatalyst based on upconversion emission

被引：0

作者：

刘恩周 ^{[1
]}

樊君 ^{[1
]}

胡晓云 ^{[2
]}

侯文倩 ^{[1
]}

代宏哲 ^{[1
]}

机构：

[1] School of Chemical Engineering, Northwest University, Xi'an 710069, China

[2] Department of Physics, Northwest University, Xi'an 710069, China

来源：

Chinese Physics B | 2012年 / 04期

基金：

中国国家自然科学基金;

关键词：

rare-earth free upconversion luminescent material; ultraviolet emission; titanium dioxide; photocatalytic reduction of CO 2;

D O I：

暂无

中图分类号：

O482.31 [发光学];

学科分类号：

070205 ; 0805 ; 080502 ; 0809 ;

摘要：

A rare-earth free upconversion luminescent material, 10BaF 2 :NaF, Na 3 AlF 6 , is synthesized by a hydrothermal method. The study of fluorescent spectrum indicates that it can convert visible light (550 nm–610 nm) into ultraviolet light (290 nm–350 nm), and two emission peaks at 304 nm and 324 nm are observed under the excitation of 583 nm at room temperature. Subsequently, 10BaF 2 :NaF, Na 3 AlF 6 /TiO 2 composite photocatalyst is prepared and its catalytic activity is evaluated by the photocatalytic reduction of CO 2 under visible light irradiation (λ > 515 nm). The results show that 10BaF 2 :NaF, Na 3 AlF 6 /TiO 2 is a more effective photocatalyst for CO 2 reduction than pure TiO 2 , their corresponding methanol yields are 179 and 0 μmol/g-cat under the same conditions. Additionally, the mechanism of photocatalytic reduction of CO 2 on 10BaF 2 :NaF, Na 3 AlF 6 /TiO 2 is proposed.

引用

页码：253 / 260

页数：8