Anion selective pTSA doped polyaniline@graphene oxide-multiwalled carbon nanotube composite for Cr(VI) and Congo red adsorption

被引:147
作者
Ansari, Mohammad Omaish [1 ,2 ]
Kumar, Rajeev [3 ]
Ansari, Sajid Ali [2 ]
Ansari, Shahid Pervez [4 ]
Barakat, M. A. [3 ,5 ]
Alshahrie, Ahmed [1 ,6 ]
Cho, Moo Hwan [2 ]
机构
[1] King Abdulaziz Univ, Ctr Nanotechnol, Jeddah 21589, Saudi Arabia
[2] Yeungnam Univ, Sch Chem Engn, Gyongsan 712749, Gyeongbuk, South Korea
[3] King Abdulaziz Univ, Dept Environm Sci, Fac Meteorol Environm & Arid Land Agr, Jeddah 21589, Saudi Arabia
[4] Aligarh Muslim Univ, Fac Engn & Technol, Dept Appl Chem, Aligarh 202002, Uttar Pradesh, India
[5] Cent Met R&D Inst, Cairo 11421, Egypt
[6] King Abdulaziz Univ, Fac Sci, Phys Dept, Jeddah, Saudi Arabia
基金
新加坡国家研究基金会;
关键词
Polyaniline; Graphene oxide; Adsorption; Heavy metals removal; Dye adsorption; EFFICIENT REMOVAL; AQUEOUS-SOLUTIONS; ACTIVATED CARBON; NANOCOMPOSITES; DYE; SUPERCAPACITORS; PERFORMANCE; CHROMIUM; WATER;
D O I
10.1016/j.jcis.2017.02.034
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
Multiwalled carbon nanotube (CNT)-graphene oxide (GO) composite was combined with polyaniline (Pani) using an oxidative polymerisation technique. The resulting Pani@GO-CNT was later doped with para toluene sulphonic acid (pTSA) to generate additional functionality. The functional groups exposed on the GO, Pani and pTSA were expected to impart a high degree of functionality to the pTSAPani@GO-CNT composite system. The composite was characterised by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The characterisation results revealed the characteristics of Pani, GO, CNT, and pTSA, and suggested the successful formation of the pTSA-Pani@GO-CNT composite system. The composite was utilised successfully for the adsorptive removal of Cr(IV) and Congo red (CR) dye and the adsorption of both pollutants was found to be strongly dependent on the solution pH, adsorbate concentration, contact time, and reaction temperature. The maximum adsorption of Cr(IV) and CR was observed in an acidic medium at 30 degrees C. The kinetics for Cr(1V) and CR adsorption was studied using pseudo -first order, pseudo -second order, and intraparticle diffusion models. The adsorption equilibrium data were also fitted to the Langmuir and Freundlich isotherm models. The thermodynamic results showed that the adsorption process was exothermic in nature. The present study provides a new methodology for the preparation of a highly functionalised Pani-based nanocomposite system and its potential applications to the adsorptive removal of a multicomponent pollutant system from an aqueous solution. (C) 2017 Elsevier Inc. All rights reserved.
引用
收藏
页码:407 / 415
页数:9
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