The charge storage properties of CRGO were evaluated

4. Conclusions
In conclusion, the current work reports the potential use of natural, eco-friendly and non-toxic β-carotene as reducing agent for GO reduction. The oxygen scavenging property of β-carotene successfully removes oxygen functionalities on GO nanosheets. The PCI-24781 optimization study shows that complete reduction can be achieved within 16 h using 10 mM of β-carotene. Furthermore, spectroscopic and microscopic analyses indicate that the reduction efficacy of β-carotene is comparable to the commonly used hydrazine reducing agent. The electrochemical study also reveals alveoli the CRGO has good charge storage properties, and offers the green replacement possibility of β-carotene in the production of graphene as supercapacitor electrode.
AcknowledgementsK.F. Chong and co-workers would like to acknowledge the funding from the Ministry of Education Malaysia in the form of MTUN-COE (RDU121212 & RDU121213) and ERGS (RDU120406).
Phenolic acids; Flavonoids; Anthocyanins; Proanthocyanidins; HPLC–DAD–MS