CAJ | 학술논문

以镍为催化剂,在常压条件下,乙炔和氦气气氛中,利用电弧法合成无定型纳米碳管(ACNT)和纳米碳纤维(ACNF).采用透射电镜(TEM)和拉曼光谱(Raman)对产物进行表征,并采用发射光谱(OES)对等离子体的形成过程进行在线诊断.TEM电镜观察结果表,ACNT和ACNF的直径在60～100 nm之间,而且ACNF可能转化成ACNT.Raman分析结果表明,阴极上形成的ACNT的石墨化程度要高于阳极上形成的ACNT或ACNF.OES结果表明,等离子体中有C2和CH活性物种生成,它们可能是形成ACNT和ACNF的前驱体.
이얼위최화제,재상압조건하,을결화양기기분중,이용전호법합성무정형납미탄관(ACNT)화납미탄섬유(ACNF).채용투사전경(TEM)화랍만광보(Raman)대산물진행표정,병채용발사광보(OES)대등리자체적형성과정진행재선진단.TEM전경관찰결과표,ACNT화ACNF적직경재60～100 nm지간,이차ACNF가능전화성ACNT.Raman분석결과표명,음겁상형성적ACNT적석묵화정도요고우양겁상형성적ACNT혹ACNF.OES결과표명,등리자체중유C2화CH활성물충생성,타문가능시형성ACNT화ACNF적전구체.
Amorphous carbon nanotubes (ACNTs) and amorphous carbon nanofibers (ACNFs) were synthesized at atmospheric pressure with Ni as catalyst in the medium of C2H2 and He by arc discharge. The microstructure of ACNTs and ACNFs was characterized by transmission electronic microscopy (TEM) and Raman spectroscopy. The plasma was diagnosed in situ by optical emission spectroscopy (OES) to investigate the formation process of ACNTs. The TEM observation results show that the diameter of ACNTs as well as ACNFs is in the range of 60～100 nm and ACNFs can become ACNTs. Raman analysis results reveal the amorphous nature of ACNTs and ACNFs. The graphitization degree of ACNTs from the cathode is higher than that of ACNTs or ACNFs from the anode. The OES analysis shows that C2 and CH species might be the precursors for the formation of ACNTs and ACNFs.