An efficient and eco‐friendly solution‐chemical route for preparation of ultrastable reduced graphene oxide suspensions. Issue 8 (29th May 2014)

• Record Type: Journal Article
• Authors: He, Dafang; Shen, Liming; Zhang, Xiaoyan; Wang, Yifeng; Bao, Ningzhong; Kung, Harold H.
• Is Part Of: AIChE journal. Volume 60:Issue 8(2014:Aug.)
• Page Start: 2757
• Page End: 2764
• Publication Date: 2014-05-29
• Subjects: Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.14499
• Languages: English
• ISSNs: 0001-1541

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>We describe a facile and eco‐friendly solution approach to chemically reduce graphene oxide (GO) to high‐quality graphene using nontoxic inexpensive reductants. The reduction process and mechanism of a group of eco‐friendly reductants were systematically studied. These reductants perform quite differently in terms of reduction rate (<sc>l</sc>‐ascorbic acid [<sc>l</sc>‐AA] &gt; <sc>d</sc>‐fructose &gt; sucrose &gt; glucose &gt; sodium sulfite), density of small sp² domains (<sc>l</sc>‐AA &gt; sodium sulfite &gt; glucose &gt; sucrose &gt; <sc>d</sc>‐fructose), degree of reduction (<sc>l</sc>‐AA &gt; glucose &gt; <sc>d</sc>‐fructose &gt; sodium sulfite &gt; sucrose), and stability of the reduced GO suspension (<sc>l</sc>‐AA &gt; <sc>d</sc>‐fructose &gt; sucrose &gt; glucose &gt; sodium sulfite). <sc>l</sc>‐AA shows the highest reducing ability, achieving the largest extent of reduction after 10 min in the presence of ammonia. Both residual oxygen functionalities and the adsorbed oxidization products of <sc>l</sc>‐AA on the graphene surface are responsible for stabilizing the reduced GO suspension over several months. © 2014 American Institute of Chemical Engineers <italic>AIChE J</italic>, 60: 2757–2764, 2014</p> </abstract>