Preparation of economical and environmentally friendly graphene/palygorskite/TiO2 composites and its application for the removal of methylene blue

被引：30

作者：

Zhao, Hao ^{[1
]}

Qiu, Fengxian ^{[1
]}

Yan, Jie ^{[1
]}

Wang, Jie ^{[1
]}

Li, Xin ^{[1
]}

Yang, Dongya ^{[1
]}

机构：

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

来源：

APPLIED CLAY SCIENCE | 2016年 / 121卷

基金：

中国国家自然科学基金;

关键词：

Adsorption; Graphene; TiO2; Palygorskite; Composites; Methylene blue; AQUEOUS-SOLUTION; CATIONIC DYE; ADSORPTION; CARBON; DEGRADATION; CATALYST; OXIDE; COIR;

D O I：

10.1016/j.clay.2015.12.009

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：

A novel economical and environmentally friendly graphene/palygorskite/TiO2 (Gil/Pal/TiO2) composites adsorbent was prepared and characterized by X-ray diffractometry (XRD), Fourier transform infrared (FTIR), 142 adsorption/desorption isotherms, transmission electron-microscopy (TEM) and scanning electron microscopy (SEM). The GR/Pal/TiO2 was applied to removal dye methylene blue (MB) and the optimum conditions of adsorption were investigated. The obtained results indicated that when the dosage of GR/Pal/TiO2, reaction temperature and time of the composite are 15 mg/mL, 40 degrees C and 1 h, respectively, the adsorption efficiency can reach 100%. The adsorption kinetic of MB followed the pseudo-second-order model while the adsorption isotherm confirms to the Langmuir model. The adsorption process is spontaneous and endothermic by thermodynamic study. Compared with other different reported materials, the novel GR/Pal/TiO2 composite exhibits a high adsorption ability for MB removal. The obtained results demonstrate that the prepared GR/Pal/TiO2 composites are very promising material for the removal of MB from wastewater. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：137 / 145

页数：9

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