TY - JOUR
T1 - The effect of elution speed control on purity of separated large-diameter single-walled carbon nanotubes in gel chromatography
AU - Kim, Sunwoo
AU - Kim, Woo Jae
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. NRF-2020R1A5A1019631) and the National Research Foundation of Korea (NRF) Grant by the Korean Government (MSIT) (NRF-2021M3D1A2049865).
Publisher Copyright:
© 2022 The Korean Society of Industrial and Engineering Chemistry
PY - 2022/11/25
Y1 - 2022/11/25
N2 - Large-diameter single-walled carbon nanotubes (SWNTs) have unique properties compared to small-diameter ones, for example, higher electrical conductivities, higher charge carrier mobilities, smaller bandgaps, and longer lengths, which can broaden SWNT applications. However, because the preparation methods result in mixtures of metallic SWNTs (m-SWNTs) and semiconducting SWNTs (s-SWNTs); such as in the case of small-diameter SWNTs, they must be separated and used for specific applications to obtain optimal performance characteristics. In this study, we show that simple elution speed control can increase the purity of separated large-diameter SWNTs in gel chromatography. According to the results, the flow rate of the eluant (i.e., the elution speed during gel column chromatography) greatly affects the purity of the separated m-SWNTs. We controlled the elution speed by changing the pressure inside the column during the separation process and experimentally investigated the relationship between the purity of the separated m-SWNTs and elution speed. By adjusting the elution speed to 0.13 ml/min, we obtained large quantities of pure m-SWNTs. Moreover, high-purity s-SWNTs were obtained for a wide elution speed range. Thus, highly pure m- and s-SWNTs can simultaneously be prepared by simply controlling the elution speed in single-column gel chromatography.
AB - Large-diameter single-walled carbon nanotubes (SWNTs) have unique properties compared to small-diameter ones, for example, higher electrical conductivities, higher charge carrier mobilities, smaller bandgaps, and longer lengths, which can broaden SWNT applications. However, because the preparation methods result in mixtures of metallic SWNTs (m-SWNTs) and semiconducting SWNTs (s-SWNTs); such as in the case of small-diameter SWNTs, they must be separated and used for specific applications to obtain optimal performance characteristics. In this study, we show that simple elution speed control can increase the purity of separated large-diameter SWNTs in gel chromatography. According to the results, the flow rate of the eluant (i.e., the elution speed during gel column chromatography) greatly affects the purity of the separated m-SWNTs. We controlled the elution speed by changing the pressure inside the column during the separation process and experimentally investigated the relationship between the purity of the separated m-SWNTs and elution speed. By adjusting the elution speed to 0.13 ml/min, we obtained large quantities of pure m-SWNTs. Moreover, high-purity s-SWNTs were obtained for a wide elution speed range. Thus, highly pure m- and s-SWNTs can simultaneously be prepared by simply controlling the elution speed in single-column gel chromatography.
KW - Elution speed control
KW - Gel chromatography
KW - High-purity separation
KW - Metallic SWNTs
KW - Semiconducting SWNTs
UR - http://www.scopus.com/inward/record.url?scp=85139001319&partnerID=8YFLogxK
U2 - 10.1016/j.jiec.2022.08.038
DO - 10.1016/j.jiec.2022.08.038
M3 - Article
AN - SCOPUS:85139001319
SN - 1226-086X
VL - 115
SP - 521
EP - 527
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
ER -