激光诱导法制备煤基石墨烯的探索及其结构特征研究  

Exploration and structural characteristics of laser-induced preparation of coal-based graphene

作　　者：王绍清[1] 张路 赵云刚 王小令 WANG Shaoqing;ZHANG Lu;ZHAO Yungang;WANG Xiaoling(School of Geosciences and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《煤炭科学技术》2023年第2期458-465,共8页Coal Science and Technology

基　　金：国家自然科学基金资助项目(42072196);宁夏可制备石墨烯煤炭资源优选与煤基石墨烯制备关键技术研发资助项目(2021BEG02015)。

摘　　要：为探讨以煤为含碳前驱体,利用激光诱导技术制备煤基石墨烯的可能性,选择以挖金湾高挥发分烟煤、塔山低挥发分烟煤为碳源,运用激光诱导技术制备煤基石墨烯,并应用拉曼光谱(Raman)、X射线衍射光谱(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)和高分辨率透射电镜(HRTEM)对原煤以及激光辐照后的产物进行表征。结果表明,经过激光辐照后,产物的Raman图谱呈现出典型的2D峰以及尖锐的G峰,表明其结构有序度增强。XRD图谱表明其(002)和(100)衍射峰变得窄而尖锐,层间距均为0.345 nm。XPS结果表明烟煤激光辐照后sp2的C=C键和π—π作用增强,这表明产物形成了sp^(2)网状芳香层片。通过SEM观察到的激光辐照后样品出现分层多孔结构,同时HRTEM结果显示出芳香条纹具有少层石墨烯特征,石墨烯层数多集中在2~10层,且条纹间距均为0.346 nm,与XRD得到的结果基本一致。这些分析结果表明烟煤在激光辐照后形成了煤基石墨烯。但是,受所用样品数量限制,此研究结果只是初步认识,在下一步研究中需要增加样品数量以深入研究。In order to explore the possibility of using laser induced technology to produce coal-based graphene by using coal as carbon-containing precursor,this paper chooses high volatile bituminous coal in Wajinwan and low volatile bituminous coal in Tashan as carbon sources,and uses laser induced technology to produce coal-based graphene.Raman spectroscopy(Raman),X-ray diffraction spectroscopy(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM)and high resolution transmission electron micro-scopy(HRTEM)were used to characterize raw coal and the products after laser irradiation.The results show that after laser irradiation,the Raman spectra of the products have a typical 2D peaks and sharp G peaks,indicating an alignment structure for the products generated.XRD results show that the diffraction peaks(002)and(100)become narrow and sharp,and the layer spacing is 0.345 nm.XPS results show that the C=C bond andπ—πinteraction of sp^(2) are enhanced after laser irradiation of bituminous coal,forming sp^(2) network aromatic layer.The layered porous structure of the sample after laser irradiation was observed by SEM,HRTEM results show that the aromatic fringe has the characteristics of few graphene layers,the graphene layers are mostly concentrated in 2−10 layers,and the layer spacing is 0.346 nm,which is basically consistent with the XRD results.All these data indicate that bituminous coal has been formed into coal-base graphene after laser irradiation.However,limited by the number of samples used in this paper,this study is only a preliminary understand-ing,and further research needs to increase the number of samples.

关 键 词：煤 激光诱导 石墨化 煤基石墨烯 结构表征 

分 类 号：TB333[一般工业技术—材料科学与工程]