Abstract
Preparation of graphene from chemical reduction of graphene oxide (GO) is recognized as one of the most promising methods for large-scale and low-cost production of graphene-based materials. This study reports a new, green, and efficient reducing agent (caffeic acid/CA) for GO reduction. The CA-reduced GO (CA-rGO) shows a high C/O ratio (7.15) that is among the best rGOs prepared with green reducing reagents. Electronic gas sensors and supercapacitors have been fabricated with the CA-rGO and show good performance, which demonstrates the potential of CA-rGO for sensing and energy storage applications.
Highlights
Preparation of graphene from chemical reduction of graphene oxide (GO) is recognized as one of the most promising methods for large-scale and low-cost production of graphene-based materials
The high-resolution TEM (HRTEM) images show that the prepared reduced GO (rGO) samples are few-layer nanosheets
The results from the demonstrated device applications show that the rGO produced with CA has a high conductivity, and the reported method may serve as a simple and efficient method for green production of graphene
Summary
Preparation of graphene from chemical reduction of graphene oxide (GO) is recognized as one of the most promising methods for large-scale and low-cost production of graphene-based materials. Diverse strategies have been applied for the production of graphene, mainly including mechanical or ultrasonic exfoliation[3], chemical vapor deposition (CVD)/plasmaenhanced CVD (PECVD)[4,5], epitaxial growth[6], electric arc discharge[7], chemical intercalation[8], thermal/chemical reduction of graphene oxide (GO)[9,10,11] Among these methods, chemical reduction of GO is recognized as a versatile and suitable method for the preparation of graphene in bulk quantities at a low cost. It is believed that this approach has great potentials for low cost and large-scale production of graphene-based materials from graphite
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