乙炔火焰无催化剂制备石墨烯片及生长机理研究（英文）

发布时间：2018-02-26 19:05

本文关键词： 石墨烯火焰合成法微观结构透射电子显微镜拉曼光谱　出处：《新型炭材料》2017年02期 　论文类型：期刊论文

【摘要】：采用无催化剂乙炔火焰合成法在碳化钨基板上制备出石墨烯片,所制备的石墨烯片呈花瓣状均匀地垂直生长在副产物-炭微粒上,呈现出花状形貌。实验过程中,乙炔剧烈燃烧产生高温及高压环境,加速了未完全燃烧乙炔的裂解及自由碳基团的环化反应,直接在气相环境中合成了石墨烯微晶片,部分石墨烯微晶片会卷曲成炭黑晶核,炭黑晶核会继续吸附石墨烯微晶片生长为炭微粒。但是,在反应装置的作用下,携带石墨烯微晶片以及炭黑晶核的燃气流会在基体表面形成湍流和逆流,打乱了石墨烯晶片被炭黑粒子吸附并包裹使之生长的过程,导致石墨烯微晶片垂直于炭微粒生长为花瓣状石墨烯片。
[Abstract]:Graphene sheets were prepared on tungsten carbide substrate by non-catalyst acetylene flame synthesis method. The graphene sheets were grown vertically and evenly on the by-product-carbon particles in petal shape, showing a flower-like morphology. Acetylene combustion produces high temperature and high pressure environment, which accelerates the cracking of incomplete combustion acetylene and the cyclization of free carbon group. Graphene microchips are synthesized directly in the gas phase environment. Some graphene microchips will roll into carbon black crystal nucleus. The carbon black crystal nucleus will continue to adsorb graphene microcrystal to grow into carbon particle. However, under the action of the reaction device, the gas flow carrying the graphene microcrystal and the carbon black crystal nucleus will form turbulence and countercurrent on the surface of the matrix. The process of adsorption and growth of graphene wafer by carbon black particles was disturbed, which led to the growth of graphene microcrystals perpendicular to the carbon particles into petal-like graphene sheets.
【作者单位】：西北工业大学凝固技术国家重点实验室碳/碳复合材料省级工程技术研究中心;
【基金】：National Natural Science Foundation of China(51502242) Research Fund of State Key Laboratory of Solidification Processing(NWPU),China(85-TZ-2013)~~
【分类号】：TQ127.11

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