Adsorption of organic pollutants by nano-conducting polymers composites: Effect of the supporting nano-oxide type

被引：20

作者：

Ali, Shimaa M. ^{[1
,2
]}

Emran, Khadija M. ^{[1
]}

Al-Oufi, Aishah L. L. ^{[1
]}

机构：

[1] Taibah Univ, Dept Chem, Fac Sci, Madinah 30002, Saudi Arabia

[2] Cairo Univ, Dept Chem, Fac Sci, Giza 12613, Egypt

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2017年 / 233卷

关键词：

Conducting polymers; Nano-composites; Adsorption; Organic dyes; DYE CONGO RED; AQUEOUS-SOLUTION; ENHANCED ADSORPTION; REMOVAL; NANOPARTICLES; KINETICS; WATER; EQUILIBRIUM; MECHANISM; BEHAVIOR;

D O I：

10.1016/j.molliq.2017.03.006

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：

Nano-composites of polyaniline (PANI) are prepared by the chemical polymerization method in the presence of different nano-supporting oxides, SiO2, TiO2, Al2O3, and Fe3O4. XRD and TEM revel the formation of cubic phases of PANI/Al2O3 and PANI/Fe3O4 composites and orthorhombic and hexagonal phases of PANI/TiO2 and PAI/SiO2 composites with average particle size values of 13.1, 7.5, 7.9, and 16.0 nm, respectively. TGA confirms that the thermal stability of PANI is increased by forming nano-composites with different nano-oxides. All prepared PANI composites are applied as sorbents for congo red removal from aqueous solutions. Several factors affecting the adsorption process such as pH, contact time, initial dye concentration, temperature, and the sorbent dose are optimized and explained in terms of the supporting oxide type. Adsorption follows pseudo second order kinetics and Langmuir isotherm. Calculated thermodynamic parameters confirm chemisorption mode. The performance of nano-PANI composites in real sample analysis gives a satisfactory result. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：89 / 99

页数：11

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