Preparation of a stable aqueous suspension of reduced graphene oxide by a green method for applications in biomaterials

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:497

Article

Ji, Xiang^1,2  Song, Yahui³  Han, Jing^1,2  Ge, Lin⁴  Zhao, Xiaoxiang³  Xu, Chen⁵  Wang, Yongqiang⁶  Wu, Di^1,2  Qiu, Haixia¹ 

[1] Huanhu Hosp, Tianjin 300060, Peoples R China

[2] Tianjin Cerebral Vasc & Neural Degenerat Dis Key, Tianjin 300060, Peoples R China

[3] Tianjin Univ, Sch Sci, Tianjin, Peoples R China

[4] Tianjin Med Univ, Tianjin 300072, Peoples R China

[5] Beijing 302 Hosp, Beijing 300060, Peoples R China

[6] Tianjin First Ctr Hosp, Tianjin 300192, Peoples R China

关键词: Graphene oxide;    Stable;    Green method;    Sodium salicylate;   

DOI  :  10.1016/j.jcis.2016.09.049

来源: Elsevier

【 摘 要 】

A green approach for the preparation of a stable reduced graphene oxide (RGO) suspension from graphene oxide (GO) has been developed. This method uses L-serine (L-Ser) as the reductant and yellow dextrin (YD) as the stabilizing agent. X-ray photoelectron spectroscopy, UV-vis spectroscopy, X-ray diffraction and thermogravimetric analyses showed that L-Ser can efficiently reduce GO at a comparatively low temperature, and that the YD adsorbed onto the RGO facilitating the formation of a stable RGO aqueous suspension. Since L-Ser and YD are natural environmentally friendly materials, this approach provides a green method to produce stable RGO from GO on a large scale. Sodium salicylate (SS) which has an aromatic structure was loaded onto the RGO through pi-pi interactions and a maximum loading capacity of 44.6 mgig was obtained. The release of the loaded SS can be controlled by adjusting the solution pH, and a 74.8% release was reached after 70 h at pH 7.4. The release profile of SS could be further controlled by incorporating it into RGO Dispersed carboxylated chitosan films. (C) 2016 Published by Elsevier Inc.

【 授权许可】

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