Mechanism of graphene oxide laser reduction at ambient conditions: Experimental and ReaxFF study

被引:21
作者
Orekhov, N. D. [1 ,2 ,7 ]
Bondareva, J. V. [3 ]
Potapov, D. O. [1 ,2 ]
Dyakonov, P. V. [3 ]
Dubinin, O. N. [3 ,4 ]
Tarkhov, M. A. [5 ]
Diudbin, G. D. [5 ]
Maslakov, K. I. [6 ]
Logunov, M. A. [1 ,2 ]
Kvashnin, D. G. [8 ]
Evlashin, S. A. [3 ]
机构
[1] Moscow Inst Phys & Technol, 9 Inst Sky Per, Dolgoprudnyi 141701, Moscow Region, Russia
[2] Russian Acad Sci, Joint Inst High Temperatures, 13 Izhorskaya Bd 2, Moscow 125412, Russia
[3] Skolkovo Inst Sci & Technol, Ctr Mat Technol, 30,Bld 1 Bolshoy Blvd, Moscow 121205, Russia
[4] St Petersburg State Marine Tech Univ, Lotsmanskaya St 3, St Petersburg 190121, Russia
[5] Russian Acad Sci, Inst Nanotechnol Microelect, 32A Leninsky Prospekt, Moscow 119991, Russia
[6] Lomonosov Moscow State Univ, GSP 1 Leninskiye Gory, Moscow 119991, Russia
[7] Bauman Moscow State Tech Univ, 5 2nd Baumanskaya Str, Moscow 105005, Russia
[8] Russian Acad Sci, Emanuel Inst Biochem Phys, 4 Kosigina St, Moscow 119334, Russia
基金
俄罗斯科学基金会;
关键词
GO reduction; Laser annealing; GO combustion; Reactive molecular dynamics; rGO preparation; MOLECULAR-DYNAMICS; GRAPHITE OXIDE; CHEMICAL-REDUCTION; FORCE-FIELD; SIMULATIONS; OXIDATION; FIBER;
D O I
10.1016/j.carbon.2022.02.018
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Search for a cheap and efficient route of graphene fabrication is still far from its conclusion, and reduction of graphene oxide (GO) is considered one of the most promising ways to achieve this goal. Here we perform combined experimental and computational analysis of a simple yet efficient and environment-friendly method for reducing GO using nanosecond infrared laser irradiation, which can be performed under ambient conditions and does not require an inert atmosphere or vacuum. We demonstrate that ultrafast heating up to 3800 K leads to a fascinating regime of high quality GO reduction even in the presence of atmospheric air. This surprising effect is achieved as an interplay between two seemingly opposite processes: combustion on the highly-defective areas of GO, such as grain boundaries, and defect annealing in its bulk part. As a result, under particular pulse regimes, after a small loss of mass (primarily from its edges), GO transforms into rGO with a high local order and low Raman I(D)/I(G) ratio. (c) 2022 Elsevier Ltd. All rights reserved.
引用
收藏
页码:546 / 554
页数:9
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