Efficient coagulation of graphene oxide on chitosan–metal oxide composites from aqueous solutions

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• 作者：Jian Wang ; Wen Yao ; Pengcheng Gu ; Shujun Yu ; Xiangxue Wang ; Yi Du…
• 关键词：Graphene oxide ; Coagulation ; Chitosan–metal oxides ; Mechanism
• 刊名：Cellulose
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：24
• 期：2
• 页码：851-861
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Bioorganic Chemistry; Physical Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer Netherlands
• ISSN：1572-882X
• 卷排序：24

文摘

In this study, chitosan–metal oxide composites (CS–MO) were prepared for graphene oxide (GO) removal from aqueous solutions. The results showed that the GO coagulation on CS–MO was dependent on pH and ionic strength. The maximum GO removal capacities reached 442.5 mg/g on CS–Al₂O₃, 425.0 mg/g on CS–ZnO and 421.2 mg/g on CS–MgO, respectively, showing a huge advantage in the efficient elimination of GO from natural water system. The coagulation of GO on CS–MO was dominated by electrostatic attraction in acidic conditions and by hydrogen bonds in neutral and alkaline conditions. The findings are helpful to improve the current understanding of the environmental behavior of GO in natural aqueous systems.