Polyaniline modified MIL-100(Fe) for enhanced photocatalytic Cr(VI) reduction and tetracycline degradation under white light

被引：188
作者：
Chen, Dan-Dan [1 ]
Yi, Xiao-Hong [1 ]
Zhao, Chen [1 ]
Fu, Huifen [1 ]
Wang, Peng [1 ]
Wang, Chong-Chen [1 ]
机构：
[1] Beijing Univ Civil Engn & Architecture, Beijing Key Lab Funct Mat Bldg Struct & Environm, Beijing 100044, Peoples R China
来源：
CHEMOSPHERE | 2020年 / 245卷
基金：
中国国家自然科学基金;
关键词：
MIL-100(Fe); Polyaniline; Z-Scheme photocatalyst; Cr(VI) reduction; Tetracycline degradation; METAL-ORGANIC FRAMEWORK; DRIVEN PHOTOCATALYST; AQUEOUS CR(VI); SELECTIVE OXIDATION; WASTE-WATER; EFFICIENT; COMPOSITE; REMOVAL; PERFORMANCE; PHOTOREDUCTION;
D O I：
10.1016/j.chemosphere.2019.125659
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The Z-scheme MIL-100(Fe)/PANI composite photocatalysts were facilely prepared from MIL-100(Fe) and polyaniline (PANT) by ball-milling, and were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (MR), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), UV-visible diffuse-reflectance spectrometry (UV-vis DRS), X-ray photoelectron spectroscopy (XPS) and photoluminescence emission spectrometry (PL). The photocatalytic activities of MIL-100(Fe)/PANI composites were investigated via tetracycline degradation and hexavalent chromium reduction in aqueous solution under the irradiation of white light. The results revealed that the MIL-100(Fe)/PANI composite photocatalysts exhibited outstanding photocatalytic activities toward Cr(VI) reduction and tetracycline decomposition. The effects of pH and coexisting ions on the photocatalytic Cr(VI) reduction were investigated. As well, the primary active species were identified via electron spin resonance (ESR) determination. A possible Z-scheme photocatalyst mechanism was proposed and verified. Finally, MIL-100(Fe)/PANI composites demonstrated good reusability and stability in water solution, implying potentially practical applications for real wastewater treatment. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：12
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