Parameter control and concentration analysis of graphene colloids prepared by electric spark discharge method

Nanotechnology Reviews

article

Kuo-Hsiung Tseng¹  Hsueh-Chien Ku¹  Der-Chi Tien¹  Leszek Stobinski² 

[1] Department of Electrical Engineering, National Taipei University of Technology;Warsaw University of Technology

关键词: Electric spark discharge method;    Graphene colloid;    Absorbance;    Zeta potential;    Concentration;   

DOI  :  10.1515/ntrev-2019-0018

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

In this study, graphene colloids were prepared using the electric spark discharge method (ESDM) with graphite rods (99.9% purity) in deionized water (DW) at a normal temperature and pressure. Five different types of graphene colloids were prepared using an electrical discharge machine (EDM) with five different pulse cycle switching times (T on :T off ) = 10:10, 30:30, 50:50, 70:70, and 90:90 μs. According to the Ultraviolet-visible spectra (UV-Vis) and Zetasizer analysis, the results showed that the 10:10 μs parameter was the most suitable for the preparation of graphene colloids. UV-Vis was also used to detect the concentration of the graphene colloids; a comparison with a graphene oxide (GO) confirmed that this method could be used to calculate the discharge time needed to produce graphene colloids with different concentrations in the ESDM process.

【 授权许可】

CC BY