公开(公告)号：US20230039609A1

公开(公告)日：2023-02-09

申请号：US17847150

申请日：2022-06-22

申请人： INDUSTRY-ACADEMIA COOPERATION GROUP OF SEJONG UNIVERSITY

发明人： Nae Sung LEE ,  Syed Muhammad ZAIN MEHDI

IPC分类号： C01B32/16 ,  B01J19/08

摘要： Disclosed are a multi-wall carbon nanotube (MWCNT) formed using arc discharge and a method for manufacturing the same. The carbon source of the anode and boron that is the doping source, are evaporated through arc discharge and then deposited on the surface of the cathode to form MWCNTs, and boron is evenly distributed in the multi-walls of the MWCNTs. Therefore, the outer diameter of the MWCNT is reduced, high thermal stability is secured, and the effect of improving the field emission characteristics can be obtained.

公开(公告)号：US20190292058A1

公开(公告)日：2019-09-26

申请号：US16362599

申请日：2019-03-22

申请人： INDUSTRY-ACADEMIA COOPERATION GROUP OF SEJONG UNIVERSITY

发明人： Nae Sung LEE ,  Tae Hun SHIN

IPC分类号： C01B32/16

摘要： Disclosed is a method for producing CNTs by an electric arc discharge method. The synthesis gas for the arc discharge includes nitrogen and oxygen gases. The oxygen gas in the synthesis gas is converted to reactive oxygen species by the arc discharge and chemically reacts with amorphous carbon. Accordingly, the formation of amorphous carbon is suppressed when CNTs are formed on the cathode, and thus, high crystallinity of CNTs can be secured.

公开(公告)号：US20150251910A1

公开(公告)日：2015-09-10

申请号：US14586651

申请日：2014-12-30

申请人： Industry-Academia Cooperation Group Of Sejong University

发明人： Nae Sung LEE ,  Jeung Choon GOAK ,  Chang Jin LIM ,  Eun Kyung CHO

IPC分类号： C01B31/02

CPC分类号： C01B31/026 ,  B82Y40/00 ,  C01B32/17 ,  Y10S977/845

摘要： A method for purifying carbon nanotubes (CNTs) includes heating the CNTs including metallic impurities and metallic oxide impurities; reducing the metallic oxide impurities by passing a reducing gas through the CNTs; removing the metallic impurities and the reduced metallic oxide impurities by passing a liquid halide through the CNTs using a carrier gas; and cooling the CNTs. Therefore, by simply passing liquid chloroform through CNTs using a carrier gas, a method for purifying CNTs can be provided so as to simply, economically, and effectively remove metallic impurities from the CNTs in a short time through one step. In addition, the purification effect can be further improved by removing the metallic oxide impurities as well as the metallic impurities through the reducing step. In addition, it is possible to improve the purification effect by further performing a step of removing a halogen or an acid-treatment purification step.

摘要翻译： 碳纳米管（CNT）的净化方法包括加热包含金属杂质和金属氧化物杂质的CNT， 通过使还原气体通过CNT来减少金属氧化物杂质; 通过使用载气使液态卤化物通过CNT去除金属杂质和还原的金属氧化物杂质; 并冷却CNT。 因此，通过使用载气简单地使液体氯仿通过CNT，可以提供CNT的净化方法，以简单，经济，有效地在短时间内从CNT中去除金属杂质。 此外，通过还原步骤除去金属氧化物杂质以及金属杂质，可以进一步提高净化效果。 此外，通过进一步进行除去卤素或酸处理纯化步骤的步骤，可以提高净化效果。