Preparation of graphene oxide/cellulose composites in ionic liquid for Ce (III) removal

Yan Hao; Yu Cui; Jing Peng; Na Zhao; Shijie Li; Maolin Zhai

doi:10.1016/j.carbpol.2018.12.068

Preparation of graphene oxide/cellulose composites in ionic liquid for Ce (III) removal

Carbohydr Polym. 2019 Mar 15:208:269-275. doi: 10.1016/j.carbpol.2018.12.068. Epub 2018 Dec 21.

Authors

Yan Hao¹, Yu Cui², Jing Peng³, Na Zhao⁴, Shijie Li⁵, Maolin Zhai⁶

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; Institute of Applied Chemistry School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China; Office of Science and Technology Development, Peking University, Beijing 100080, China. Electronic address: haoyannk@163.com.
² Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. Electronic address: chemcuiyu@pku.edu.cn.
³ Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. Electronic address: jpeng@pku.du.cn.
⁴ Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. Electronic address: zhaona-chem@pku.edu.cn.
⁵ Office of Science and Technology Development, Peking University, Beijing 100080, China. Electronic address: lisj@pku.edu.cn.
⁶ Beijing National Laboratory for Molecular Sciences, Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, The Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. Electronic address: mlzhai@pku.edu.cn.

PMID: 30658800
DOI: 10.1016/j.carbpol.2018.12.068

Abstract

An environmental friendly adsorbent was prepared by mixing graphene oxide (GO) and cellulose in 1-butyl-3-methylimidazolium chloride ionic liquid. The characterization of GO/cellulose composite films (CGC) was carried out by Fourier-transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis and X-ray photoelectron spectroscopy (XPS). The Ce (III) adsorption on CGC was evaluated systematically, revealing that the adsorption equilibrium could be achieved within 40 min. The adsorption behavior was well fitted to the pseudo-second-order kinetic model and the Langmuir adsorption model. The XPS analysis indicated that two peaks attributing to Ce_3d nearly disappeared after desorption in NaCl, which confirmed the ion exchange mechanism. Furthermore, the CGC adsorbent had a high adsorption capacity of Ce (III) in a wide pH range of 3-8 with a theoretical maximum adsorption capacity of Ce (III) 109.1 mg g^-1. This work indicated that as-prepared CGC is a promising adsorbent for removing rare earth ions pollutants from wastewater.

Keywords: Adsorption; Ce (III); Cellulose; Graphene oxide; Ionic liquids.