Selective photodegradation of 1-methylimidazole-2-thiol by the magnetic and dual conductive imprinted photocatalysts based on TiO2/Fe3O4/MWCNTs

被引：61

作者：

Luo, Yingying ^{[1
]}

Lu, Ziyang ^{[2
]}

Jiang, Yinhua ^{[1
]}

Wang, Dandan ^{[1
]}

Yang, Lili ^{[1
]}

Huo, Pengwei ^{[1
]}

Da, Zulin ^{[1
]}

Bai, Xuliang ^{[1
]}

Xie, Xulan ^{[1
]}

Yang, Pengyi ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Chem & Chem Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jiangsu Univ, Sch Environm, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2014年 / 240卷

基金：

中国博士后科学基金;

关键词：

1-Methylimidazole-2-thiol; Conducting polymer; Dual conductive system; Magnetic carbon nanotubes; Selective photodegradation; Surface molecular imprinting; VISIBLE-LIGHT; TITANIUM-DIOXIDE; METHYL MERCAPTAN; AQUEOUS-SOLUTION; SOLVOTHERMAL SYNTHESIS; HYBRID NANOSTRUCTURES; ASH CENOSPHERES; CARBON; CATALYST; REMOVAL;

D O I：

10.1016/j.cej.2013.11.088

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The magnetic and dual conductive imprinted photocatalysts (MCIPs) were synthesized through the suspension polymerization method. TiO2/Fe3O4/MWCNTs, 1-methylimidazole-2-thiol and pyrrole were used as supports, template molecule and functional monomer, respectively. The MCIPs were further characterized by X-ray diffraction (XRD), Fourier transform infrared spectra (FT-IR), scanning electron microscopy (SEM), transmission electron microscope (TEM), UV-visible diffuse reflectance spectra (UV-vis DRS), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The result revealed that polypyrrole (PPy) was formed and well embedded in the surface imprinted layer of TiO2/Fe3O4/MWCNTs. Owing to PPy and MWCNTs, the MCIPs was equipped with dual conductivity which was particularly useful for photodegradation of 1-methylimidazole-2-thiol in aqueous solution under ultraviolet irradiation. Through a series investigation of factors, it was obvious that when the polymerization time was 24 h and the adding dose of pyrrole was 8 mmol, the resulting MCIPs obtained the highest photocatalytic ability. In addition, the photodegradation process obeyed the pseudo-first-order kinetic reaction and exhibited an excellent selective degradation ability of 1-methylimidazole-2-thiol. The degradation intermediate products and mechanism of 1-methylimidazole-2-thiol were further discussed. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：244 / 252

页数：9

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