Green and Mild Oxidation: An Efficient Strategy toward Water-Dispersible Graphene

详细信息    查看全文

• 作者：Xiaofei You ; Siwei Yang ; Jipeng Li ; Yuan Deng ; Lianqi Dai ; Xiong Peng ; Haoguang Huang ; Jing Sun ; Gang Wang ; Peng He ; Guqiao DingXiaoming Xie
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：January 25, 2017
• 年：2017
• 卷：9
• 期：3
• 页码：2856-2866
• 全文大小：644K
• ISSN：1944-8252

文摘

Scalable fabrication of water-dispersible graphene (W-Gr) is highly desirable yet technically challenging for most practical applications of graphene. Herein, a green and mild oxidation strategy to prepare bulk W-Gr (dispersion, slurry, and powder) with high yield was proposed by fully exploiting structure defects of thermally reduced graphene oxide (TRGO) and oxidizing radicals generated from hydrogen peroxide (H₂O₂). Owing to the increased carboxyl group from the mild oxidation process, the obtained W-Gr can be redispersed in low-boiling solvents with a reasonable concentration. Benefiting from the modified surface chemistry, macroscopic samples processed from the W-Gr show good hydrophilicity (water contact angle of 55.7°) and excellent biocompatibility, which is expected to be an alternative biomaterial for bone, vessel, and skin regeneration. In addition, the green and mild oxidation strategy is also proven to be effective for dispersing other carbon nanomaterials in a water system.