Nano Archive

An efficient composite growing N-doped TiO2 on multi-walled carbon nanotubes through sol-gel process

Huang, Bing-Shun and Chang, Feng-Yim and Wey, Ming-Yen (2010) An efficient composite growing N-doped TiO2 on multi-walled carbon nanotubes through sol-gel process. Journal of Nanoparticle Research, 12 (7). pp. 2503-2510.

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High-activity, visible-light-driven photocatalysts were prepared by forming N-doped TiO2 on multi-walled carbon nanotubes (MWCNTs). The use of MWCNTs as the support in a N-doped TiO2 system favored electron trapping, because the recombination process could be retarded, thus promoting photocatalytic activity. The prepared photocatalysts were systematically characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunaure–Emmett–Teller (BET) spectroscopy, and UV–Vis diffuse reflectance spectroscopy (UV–Vis/DRS). The results indicated that the N-doped TiO2 coated on MWCNTs improved the surface area and slightly modified the optical properties of the composite. The activities of the photocatalysts were probed by photodegradation of methanol in the presence of visible light irradiation. The experimental results revealed that the strong interphase linkage between the MWCNTs and the N-doped TiO2 played a significant role in improving photocatalytic activity. However, the mechanical process for MWCNT–TiO2-x N x mixtures showed lower activity than just pure N-doped TiO2. In this study, N-doped TiO2 precursors coated with pretreated MWCNTs during a sol–gel process could effectively form a MWCNT–TiO2-x N x composite. The composite showed excellent activity and effectively enhanced the efficiency of N-doped TiO2 under the visible light region.

Item Type:Article
Uncontrolled Keywords:Visible light driven - N-doped TiO2 - Multi-walled carbon nanotubes - Recombination - Sol–gel process - Synthesis - Photocatalyst
Subjects:Material Science > Functional and hybrid materials
Material Science > Tunnelling and microscopic phenomena
Material Science > Nanofabrication processes and tools
Analytical Science > Beam methods
ID Code:9572
Deposited By:Lesley Tobin
Deposited On:30 Aug 2010 12:45
Last Modified:30 Aug 2010 12:45

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