最新的研究成果，本论文的主要观点为A simple and universal synthesis process for multi-walled carbon nanotube (MWCNT) was developed by Ni catalysis from CTP。 The influences of temperature, catalyst dosage and growth duration on crystal defect, micromorphology, yield and aspect ratio of MWCNTs were investigated systematically。 based on characterization of SEM, TEM, Raman and TGA, it is found that MWCNTs are as long as millimeter。 ID1 /IG increased from 0。91 to 1。05, and then decreased to 0。74 in the temperature range of 850-1000 o C。 There was a similar trend for the area ratio of weight loss peaks in DTG curves (S2/S1)。 Prolonged pyrolysis duration was beneficial to MWCNT forming with a maximum length up to millimeter。 On above basis, it was considered that root growth mechanisms combining vapor-liquid-solid mechanism were attributed to MWCNT growth。不知是否符合录用要求，望您批评与指正。