MIL-53(Fe) as a highly efficient bifunctional photocatalyst for the simultaneous reduction of Cr(VI) and oxidation of dyes

被引：598
作者：
Liang, Ruowen [1 ]
Jing, Fenfen [1 ]
Shen, Lijuan [1 ]
Qin, Na [1 ]
Wu, Ling [1 ]
机构：
[1] Fuzhou Univ, State Key Lab Photocatalysis Energy & Environm, Fuzhou 350002, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2015年 / 287卷
基金：
中国国家自然科学基金;
关键词：
MOFs; Photocatalysis; Visible light; Cr(VI); Dyes; METAL-ORGANIC FRAMEWORK; LIGHT-DRIVEN PHOTOCATALYST; AQUEOUS-SOLUTION; WASTE-WATER; DEGRADATION; NANOCOMPOSITE; REMOVAL; MODEL; ZNO;
D O I：
10.1016/j.jhazmat.2015.01.048
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A bifunctional photocatalyst-Fe-benzenedicarboxylate (MIL-53(Fe)) has been synthesized successfully via a facile solvothermal method. The resulting MIL-53(Fe) photocatalyst exhibited an excellent visible light (lambda >= 420 nm) photocatalytic activity for the reduction of Cr(VI), the reduction rate have reached about 100% after 40 min of visible light irradiation, which has been more efficient than that of N-doped TiO2 (85%) under identical experimental conditions. Further experimental results have revealed that the photocatalytic activity of MIL-53(Fe) for the reduction of Cr(VI) can be drastically affected by the pH value of the reaction solution, the hole scavenger and atmosphere. Moreover, MIL-53(Fe) has exhibited considerable photocatalytic activity in the mixed systems (Cr(VI)/dyes). After 6 h of visible light illumination, the reduction ratio of Cr(VI) and the degradation ratio of dyes have been exceed 60% and 80%, respectively. More significantly, the synergistic effect can also be found during the process of photocatalytic treatment of Cr(VI) contained wastewater under the same photocatalytic reaction conditions, which makes it a potential candidate for environmental restoration. Finally, a possible reaction mechanism has also been investigated in detail. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：364 / 372
页数：9
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