Abstract
Graphene oxide (GO) prepared by a modified Hummers method was reduced by NaBH4 at room temperature for 12 h in a 0.5 mg/mL GO water suspension to obtain reduced GO (RGO), using CaCl2 as a catalyst. The GO and RGO were characterized by XPS, FT-IR, UV-Vis and electrical resistivity measurements. Results show that CaCl2 improves the reduction ability of NaBH4 for oxygen-containing functional groups onthe GO. After reduction, the C/O atomic ratio increased, most of the oxygen-containing functional groupswere eliminated, and the electrical resistance decreased significantly. The highest C/O atomic ratio was 5.38 and the lowest electrical resistance of RGO was 18.6 kΩ/sq, the latter being about two orders of magnitudes lower than the RGO prepared without CaCl2. This reduction method opens a possibility of reducing GO under ambient conditions without using a toxic/corrosive reducing agent and an organic solvent.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
