Novel Al(2)O(3)/GO/halloysite nanotube composite for sequestration of anionic and cationic dyes.
Novel Al(2)O(3)/GO/halloysite nanotube composite for sequestration of anionic and cationic dyes.
复制标题
作者：
In this study, an Al2O3/graphene oxide/halloysite nanotube (Al2O3/GO/HNT) nanocomposite has been synthesized and used as an adsorbent for the sequestration of cationic methylene blue (MB) and anionic congo red (CR) dyes from wastewater. The properties of the synthesized Al2O3/GO/HNT were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Various factors such as pH, contact time, initial concentration and temperature have been investigated for evaluation of the optimum adsorption in the batch sorption experiment and experimental results showed the highest adsorption capacity was found to be 329.8 mg g−1 for CR and 258.4 mg g−1 for MB at an initial concentration of 500 mg l−1 which was three times higher than the individual Al2O3 GO and HNT concentrations. Freundlich and Langmuir adsorption isotherm models were fitted to the experimental data and the results implied that the adsorption of MB well described with Langmuir and CR is related to the Freundlich isotherm model. The kinetics data of CR and MB adsorption was well fitted to pseudo-first-order. The calculated values for thermodynamic parameters indicated that the MB and CR adsorption process were spontaneous and exothermic in nature. The effectiveness of the Al2O3/GO/HNT composite was also tested for adsorption of Cu(ii), oxytetracycline (OTC) antibiotic, and 2-chlorophenol (2CP) and the results revealed that the Al2O3/GO/HNT composite is a promising adsorbent for the dyes as well as heavy metals and other organic pollutants. In this study, an Al2O3/graphene oxide/halloysite nanotube (Al2O3/GO/HNT) nanocomposite has been synthesized and used as an adsorbent for the sequestration of cationic methylene blue (MB) and anionic congo red (CR) dyes from wastewater.
登录
查看更多内容
自组装圆柱形石墨烯-碳纳米管杂化材料去除水溶液中的亚甲基蓝
影响因子：
15.1
作者：
Ai, Lunhong;Jiang, Jing
通讯作者：
Jiang, Jing
影响因子：
15.1
作者：
Fu, Jianwei;Chen, Zhonghui;Xu, Qun
通讯作者：
Xu, Qun
DOI：
10.1016/j.jiec.2012.05.012
发表时间：
2012-11-25
影响因子：
6.1
作者：
Ayad, Mohamad M.;Abu El-Nasr, Ahmed;Stejskal, Jaroslav
通讯作者：
Stejskal, Jaroslav
影响因子：
1.1
作者：
Gulen, Jale;Akin, Bora;Ozgur, Mahmure
通讯作者：
Ozgur, Mahmure
DOI：
10.1007/s10450-009-9155-z
发表时间：
2009-08-01
影响因子：
3.3
作者：
Chen, H.;Zhao, J.
通讯作者：
Zhao, J.