Functionalization of CNTs surface with phosphonuim based deep eutectic solvents for arsenic removal from water

被引：85
作者：
AlOmar, Mohamed Khalid [1 ,2 ]
Alsaadi, Mohammed Abdulhakim [2 ,3 ]
Hayyan, Maan [1 ,2 ]
Akib, Shatirah [4 ]
Hashim, Mohd Ali [2 ,5 ]
机构：
[1] Univ Malaya, Dept Civil Engn, Kuala Lumpur 50603, Malaysia
[2] Univ Malaya, UMCiL, Kuala Lumpur 50603, Malaysia
[3] Univ Malaya, Nanotechnol & Catalysis Res Ctr NANOCAT, IPS Bldg, Kuala Lumpur 50603, Malaysia
[4] Heriot Watt Univ, Sch Energy Geosci Infrastruct & Soc EGIS, Putrajaya 62200, Malaysia
[5] Univ Malaya, Dept Chem Engn, Kuala Lumpur 50603, Malaysia
来源：
APPLIED SURFACE SCIENCE | 2016年 / 389卷
关键词：
Carbon nanotubes; Arsenic; Adsorption; Deep eutectic solvents; Ionic liquid; MULTIWALLED CARBON NANOTUBES; ADSORPTION; PURIFICATION; OXIDATION; RAMAN;
D O I：
10.1016/j.apsusc.2016.07.079
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：
Herein, we present the use of deep eutectic solvent (DES) as functionalization agents for carbon nano tubes (CNTs) to form novel adsorbents for removal of arsenic ions (As3+) from water. Two DESs systems were prepared using methyltriphenylphosphonium bromide (MTPB) and benzyltriphenylphosphonium chloride (BTPC) as salts, in conjugation with glycerol (Gly) as a hydrogen bond donor. The resulting novel adsorbents were characterized using thermogravimetric analysis (TGA), Zeta potential, Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, XRD, EDX, FESEM, and BET surface area. Optimization studies were carried out utilizing RSM-CCD experimental design to estimate the optimum removal conditions for each adsorbent. The adsorption experimental data of both adsorbents were found to fit well with pseudo-second-order kinetics model, as well as with Langmuir and Freundlich adsorption isotherm models. The maximum adsorption capacity of a MTPB-DES-functionalized CNTs adsorbent was 23.4 mg/g. (C) 2016 Elsevier B.V. All rights reserved.
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收藏
页码：216 / 226
页数：11
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