Synthesis and characterization of graphene layers from rice husks

Chemical Bulletin of Kazakh National University

Zulkhair A. Mansurov¹  Nazym S. Elibaeva²  Dmitry I. Chenchik³  Mukhtar A. Yeleuov⁴  Roberto Di Capua⁵  Makpal A. Seitzhanova⁵ 

[1] Satpayev University, Almaty, Kazakhstan;Department of Physics, University of Naples Federico II, Naples, Italy;Institute of Combustion Problems, Almaty, Kazakhstan;Institute of Combustion Problems;al-Farabi Kazakh National University, Institute of Combustion Problems, Almaty, Kazakhstan;

关键词: graphene;    rice husk;    carbonization;    exfoliation;    chemical activation;   

DOI  :  10.15328/cb986

来源: DOAJ

【 摘 要 】

In this work, a method of obtaining graphene layers from natural source specifically from rice husk was developed. A rice husk (RH) was used as a raw material, and potassium hydroxide was used as activation agent. The graphene layers were obtained after four successive stages: pre-carbonization, desilication in 1M NaOH solution, chemical activation and exfoliation of the carbonized rice husk (CRH). The obtained samples were studied using Raman spectroscopy, TEM and SEM; the Raman peaks evidenced the presence of graphene multilayers in the sample. A detailed observation of Raman spectroscopy showed that the obtained samples with ratio of 1/4 and 1/5 (RH/KOH) consisted of graphene layers with a high content of amorphous component. The yield of the product was ~ 3% by weight. This study can provide a new way to the large-scale synthesis of low-cost single and multi-layered graphene using rice husk or other renewable resources.

【 授权许可】

Unknown