Porous graphene oxide/carboxymethyl cellulose monoliths, with high metal ion adsorption

详细信息    查看全文

• 作者：Yongli Zhang ; Yue Liu ; Xinrui Wang ; Zhiming Sun ; Junkui Ma ; Tao Wu ; Fubao Xing ; Jianping Gao
• 关键词：Graphene oxide ; Carboxymethyl cellulose ; Porous monolith ; Metal ion adsorption
• 刊名：Carbohydrate Polymers
• 出版年：30 January, 2014
• 年：2014
• 卷：101
• 期：Complete
• 页码：392-400
• 全文大小：2303 K

文摘

Orderly porous graphene oxide/carboxymethyl cellulose (GO/CMC) monoliths were prepared by a unidirectional freeze-drying method. The porous monoliths were characterized by Fourier transform infrared spectra, X-ray diffraction and scanning electron microscopy. Their properties including compressive strength and moisture adsorption were measured. The incorporation of GO changed the porous structure of the GO/CMC monoliths and significantly increased their compressive strength. The porous GO/CMC monoliths exhibited a strong ability to adsorb metal ions, and the Ni²⁺ ions adsorbed on GO/CMC monolith were reduced by NaBH₄ to obtain Ni GO/CMC monolith which could be used as catalyst in the reduction of 4-nitrophenol to 4-aminophenol. Since CMC is biodegradable and non-toxic, the porous GO/CMC monoliths are potential environmental adsorbents.