期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 289, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2022.126450
关键词
Graphene; Electrochemical exfoliation; Supercapacitor; Vein graphite; Top down
资金
- Postgraduate Institute of Science (PGIS University of Peradeniya, Sri Lanka) [PGIS/2020/010]
This study focuses on a low-cost and nonoxidative approach to exfoliating vein graphite into graphene. The combination of electrochemical exfoliation and ultrasonic vibration with inexpensive black tea solution as a substitute for toxic solvents proves to be successful in producing high-quality graphene. The study reveals the potential for large-scale production of graphene using this method.
The study is focused on exfoliating vein graphite into graphene using an unsophisticated and low-cost process through a non-oxidative production route. High-quality graphene production with low-cost methods that give high yields and suitable for large-scale production, using vein graphite is a challenge to address, though there are many methods for graphene production. Vein graphite directly received from the mining site was electrochemically exfoliated to small particles which were further exfoliated by ultrasonic vibration. In addition, commonly used highly toxic, expensive solvents were substituted by inexpensive and nontoxic aqueous black tea solution, in the exfoliation by ultrasonic vibration process. Four different tea types were used to compare the quality and quantity of yields. Ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction and Raman spectroscopy were utilized for the characterization, and the study uncovers a low-cost, nontoxic, promising and nonoxidative route to exfoliate vein graphite into either single or double-layer graphene. The study uncovers that the four different tea types tested can be used to successfully exfoliate graphite. The suitability of the exfoliated graphene for applications was checked by utilizing them to prepare electrochemical double layer supercapacitors (EDLC). Electrochemical properties of fabricated EDLC were investigated
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据