MIL-101(Fe)/g-C3N4 for enhanced visible-light-driven photocatalysis toward simultaneous reduction of Cr(VI) and oxidation of bisphenol A in aqueous media

被引：394

作者：

Zhao, Feiping ^{[1
,2
,3
]}

Liu, Yongpeng ^{[4
]}

Ben Hammouda, Samia ^{[3
]}

Doshi, Bhairavi ^{[3
]}

Guijarro, Nestor ^{[4
]}

Min, Xiaobo ^{[1
,2
]}

Tang, Chong-Jian ^{[1
,2
]}

Sillanpaa, Mika ^{[5
]}

Sivula, Kevin ^{[4
]}

Wang, Shaobin ^{[6
]}

机构：

[1] Cent South Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China

[2] Chinese Natl Engn Res Ctr Control & Treatment Hea, Changsha 410083, Hunan, Peoples R China

[3] LUT Univ, Sch Engn Sci, Dept Green Chem, Sammonkatu 12, FI-50130 Mikkeli, Finland

[4] Ecole Polytech Fed Lausanne EPFL, Lab Mol Engn Optoelect Nanomat LIMNO, Stn 6, CH-1015 Lausanne, Switzerland

[5] Univ Southern Queensland, Fac Hlth Engn & Sci, Sch Civil Engn & Surveying, Toowoomba, Qld 4350, Australia

[6] Univ Adelaide, Sch Chem Engn & Adv Mat, Adelaide, SA 5005, Australia

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 272卷

基金：

澳大利亚研究理事会; 瑞士国家科学基金会;

关键词：

Visible-light photocatalyst; Cr(VI) reduction; MIL-101(Fe)/g-C3N4; bisphenol-A degradation; Z-scheme heterojunction; METAL-ORGANIC FRAMEWORK; GRAPHITIC CARBON NITRIDE; COMPOSITE PHOTOCATALYSTS; G-C3N4; NANOSHEETS; WASTE-WATER; DEGRADATION; PHOTODEGRADATION; ADSORPTION; REMOVAL; PERFORMANCE;

D O I：

10.1016/j.apcatb.2020.119033

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：

Heterostructured composites with an excellent photocatalytic activity have attracted increasing attention because of their great application in environmental remediation. Herein, a MIL-101(Fe)/g-C3N4 heterojunction was synthesized via in-situ growth of MIL-101(Fe) onto g-C3N4 surface. The heterojunctions were applied as a bifunctional photocatalyst for simultaneous reduction of Cr(VI) and degradation of bisphenol-A (BPA) under visible light and exhibited an obvious enhancement in photocatalytic performance compared with MIL-101(Fe) or g-C3N4. The improved activity could be attributed to the enhanced light absorption and efficient charge carrier separation by forming a direct Z-scheme heterojunction with appropriate band alignment between MIL-101(Fe) and g-C3N4. The radical trapping and electron spin resonance showed that photo-generated electrons are responsible for the reduction of Cr(VI) and BPA degradation, following an oxygen-induced pathway. This work provides new insight into the construction of metal-free semiconductor/MOFs heterojunctions as a bifunctional visible-light-driven photocatalyst for efficient and simultaneous treatment of multiple toxic pollutants in water.

引用

页数：14

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