氨分子对加热引起的石墨层间分离的影响  

Effects of Ammonia Molecules on Interlayer Separation of Graphite Caused by Heating

作　　者：成晓 余真珠[1,2] 何燕[1,2] CHENG Xiao;YU Zhenzhu;HE Yan(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China;Shangdong Engineering Laboratory for Preparation and Application of High-Performance Carbon Materials,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061 [2]青岛科技大学山东省高性能碳材料制备与应用工程实验室,山东青岛266061

出　　处：《青岛科技大学学报（自然科学版）》2023年第5期66-72,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51676103);山东省泰山学者项目(ts20190937);中央引导地方科技发展基金项目(YDZX20203700003362).

摘　　要：将含氨分子的氨水(NH_(3)·H_(2)O)、碳酸铵((NH_(4))_(2)CO_(3))和碳酸氢铵(NH_(4)HCO_(3))作为插层工质,通过搅拌和超声分别使其插入石墨层间,施加外界热激励使插层工质发生分解,分解产生的气体压力克服石墨层间范德华力。此方法利用氨分子的“楔形结构”,实现了插层工质的物理插层,研究了3种插层工质对加热引起的石墨层间分离的影响。结果表明,NH_(3)·H_(2)O作为插层工质时,分离效果最好。此外,傅里叶红外光谱结果表明没有形成C≡N或C N键,这表示含氨分子的插层工质不与石墨进行化学反应,以物理方式插入石墨层间,形成边缘插层,并且高温加热处理后,插层工质受热分解可去除干净。In this paper,ammonia(NH_(3)·H_(2)O),ammonium carbonate((NH_(4))_(2)CO_(3))and ammonium bicarbonate(NH_(4)HCO_(3))containing ammonia molecules were used as intercalation agents,which were inserted into the graphite interlayers by stirring and ultrasound,and external thermal excitation was applied to make the intercalation agents decompose.The gas pressure generated by the decomposition overcomes the van der Waals force between the graphite layers.The“wedge-shaped structure”of the ammonia molecule was utilized to realize the physical intercalation of the intercalation agents.The effect of the three intercalation agents on the interlayer separation of graphite caused by heating were studied.The results show that when NH_(3)·H_(2)O is used as the intercalation agent,the separation effect was the best.In addition,the FT-IR results show that no C≡N or C N bonds were formed,which means that the intercalation agents containing ammonia molecules did not have a chemical reaction with graphite.They were physically inserted into the interlayer of graphite to form edge intercalation.Besides,by high-temperature heating treatment,the intercalation agents can be removed cleanly by thermal decomposition.

关 键 词：石墨 氨分子 楔形结构 物理插层 

分 类 号：O613.71[理学—无机化学]