Biomineralized N-Doped CNT/TiO2 Core/Shell Nanowires for Visible Light Photocatalysis
- Title
- Biomineralized N-Doped CNT/TiO2 Core/Shell Nanowires for Visible Light Photocatalysis
- Author
- 한태희
- Keywords
- biomineralization; carbon nanotubes; dopingp; hotocatalysis; TiO 2
- Issue Date
- 2012-01
- Publisher
- 한국고분자학회
- Citation
- ACS Nano, Vol.6, No.1 [2012], p935-943
- 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.
- URI
- https://pubs.acs.org/doi/10.1021/nn204504hhttp://hdl.handle.net/20.500.11754/67169
- ISSN
- 1936-0851
- DOI
- 10.1021/nn204504h
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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