Controllable pore structures of pure and sub-millimeter-long carbon nanotubes
- Controllable pore structures of pure and sub-millimeter-long carbon nanotubes
- 양철민; 김지훈; Mochen Li; Suguru Noda; Dong Young Kim; Jungpil Kim; Kwang-Seok Kim; Keun Soo Kim
- Single-walled carbon nanotubes; Few-walled carbon nanotubes; Adsorption; Pore structure; Microporosity; Mesoporosity
- Issue Date
- Applied surface science
- VOL 566, 150751
- We report the controllable pore structures of pure (>99.5 wt%) and sub-millimeter-long single-walled and few-walled (triple-walled on average) carbon nanotubes (SWCNTs and FWCNTs, respectively) synthesized via fluidized-bed chemical vapor deposition. The pore structures and adsorption properties of the CNTs were characterized using N2 adsorption analysis at 77 K. A significant advantage of the synthesized vertically-aligned SWCNTs (diameter range: 2？4 nm) and FWCNTs (diameter range: 4？8 nm) arrays, having small bundle structures, is that the guest molecules can easily access the external surfaces of the CNTs, leading to high specific surface areas (SSAs; 903 and 337 m2 g？1, respectively) and pore volumes (2.56 and 2.05 mL g？1, respectively). Interestingly, following sonication, the SSAs of the SWCNTs and FWCNTs increased by 36% and 41%, respectively. Additionally, after mixed acid (HNO3/H2SO4) treatment, the SSAs of the SWCNTs and FWCNTs increased by 34% and 120%, respectively, which are attributed to the corresponding increases in the micropore and mesopore SSAs. These results suggest that CNT networks with controllable pore structures can be fabricated by altering the diameter distribution and alignment degree of the CNTs, thus highlighting the potential of our approach to develop cost-effective CNT-based structures for applications such as high-performance energy storage materials.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.