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Jeong, Hu Young
UNIST Central Research Facilities (UCRF)
Research Interests
  • Soft material characterization such as graphene using a low kV Cs-corrected TEM
  • Insitu-TEM characterization of carbon-based materials using nanofactory STM holder for Li-ion battery application
  • Structural characterization of mesoporous materials using SEM & TEM
  • Interface analysis between various oxides and metals through Cs-corrected (S)TEM
  • Resistive switching mechanism of graphene oxide thin films for RRAM application

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Biomineralized N-Doped CNT/TiO2 Core/Shell Nanowires for Visible Light Photocatalysis

Cited 42 times inthomson ciCited 44 times inthomson ci
Title
Biomineralized N-Doped CNT/TiO2 Core/Shell Nanowires for Visible Light Photocatalysis
Author
Lee, Won JunLee, Ju MinKochuveedu, Saji ThomasHan, Tae HeeJeong, Hu YoungPark, MoonkyuYun, Je MoonKwon, JoonNo, KwangsooKim, Dong HaKim, Sang Ouk
Keywords
biomineralization; carbon nanotubes; doping; photocatalysis; TiO 2
Issue Date
2012-01
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v.6, no.1, pp.935 - 943
Abstract
We report an efficient and environmentally benign biomimetic mineralization of TiO 2 at the graphitic carbon surface, which successfully created an ideal TiO 2/carbon hybrid structure without any harsh surface treatment or interfacial adhesive layer. The N-doped sites at carbon nanotubes (CNTs) successfully nucleated the high-yield biomimetic deposition of a uniformly thick TiO 2 nanoshell in neutral pH aqueous media at ambient pressure and temperature and generated N-doped CNT (NCNT)/TiO 2 core/shell nanowires. Unlike previously known organic biomineralization templates, such as proteins or peptides, the electroconductive and high-temperature-stable NCNT backbone enabled high-temperature thermal treatment and corresponding crystal structure transformation of TiO 2 nanoshells into the anatase or rutile phase for optimized material properties. The direct contact of the NCNT surface and TiO 2 nanoshell without any adhesive interlayer introduced a new carbon energy level in the TiO 2 band gap and thereby effectively lowered the band gap energy. Consequently, the created core/shell nanowires showed a greatly enhanced visible light photocatalysis. Other interesting synergistic properties such as stimuli-responsive wettabilites were also demonstrated.
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DOI
10.1021/nn204504h
ISSN
1936-0851
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SE_Journal Papers
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