Insight into the formation mechanism of graphene quantum dots and the size effect on their electrochemical behaviors | |
Department | 清洁能源化学与材料实验室 |
Liu YH(刘永环)1,2; Wang RT(王儒涛)1; Lang JW(郎俊伟)1; Yan XB(阎兴斌)1; Yan XB(阎兴斌) | |
The second department | 固体润滑国家重点实验室 |
2015 | |
Source Publication | Physical Chemistry Chemical Physics |
ISSN | 1463-9076 |
Volume | 17Issue:21Pages:14028-14035 |
Abstract | To study the formation mechanism and influencing factors of graphene quantum dots (GQDs), GQDs with different average sizes were prepared using a modified hydrothermal method with hydrogen peroxide (H2O2) as an etching agent and ammonia as an assistant. It is found that size-controlled GQDs were prepared by adjusting the amount of ammonia and porous reduced graphene oxide (PRGO) debris can be synthesized by reducing the hydrothermal reaction time. Structural changes of final products were mainly attributed to the changes in the etching ability of the hydroxyl radical (OH˙) against the reduction ability of the hydroxyl group (OH−) in different alkaline environments regulated by ammonia. Furthermore, we studied the electrochemical properties of GQDs and PRGO. The results showed that the specific capacitance of all samples increases linearly with the size and the smallest GQDs can work at the highest scan rate of as high as 5000 V s−1 with an ultra-fast power response (τ0 = 63.3 μs). Thus, these findings elucidate the formation mechanism of GQDs and demonstrate that GQDs are applicable in microelectronic devices with high power response requirements. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c5cp00646e |
Funding Organization | the National Defense Basic Research Program of China (B1320133001);the National Nature Science Foundations of China (21203223) |
Indexed By | SCI |
If | 4.493 |
Language | 英语 |
Funding Project | 低维材料与化学储能课题组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/18441 |
Collection | 清洁能源化学与材料实验室 固体润滑国家重点实验室(LSL) |
Corresponding Author | Yan XB(阎兴斌) |
Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100080, Peoples R China |
Recommended Citation GB/T 7714 | Liu YH,Wang RT,Lang JW,et al. Insight into the formation mechanism of graphene quantum dots and the size effect on their electrochemical behaviors[J]. Physical Chemistry Chemical Physics,2015,17(21):14028-14035. |
APA | Liu YH,Wang RT,Lang JW,Yan XB,&阎兴斌.(2015).Insight into the formation mechanism of graphene quantum dots and the size effect on their electrochemical behaviors.Physical Chemistry Chemical Physics,17(21),14028-14035. |
MLA | Liu YH,et al."Insight into the formation mechanism of graphene quantum dots and the size effect on their electrochemical behaviors".Physical Chemistry Chemical Physics 17.21(2015):14028-14035. |
Files in This Item: | ||||||
File Name/Size | DocType | Version | Access | License | ||
c5cp00646e.pdf(3083KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment