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Citation: Sharifah Bee Abd Hamid, Tong Ling Tan, Chin Wei Lai, Emy Marlina Samsudin. Multiwalled carbon nanotube/TiO2 nanocomposite as a highly active photocatalyst for photodegradation of Reactive Black 5 dye[J]. Chinese Journal of Catalysis, ;2014, 35(12): 2014-2019. doi: 10.1016/S1872-2067(14)60210-2 shu

Multiwalled carbon nanotube/TiO2 nanocomposite as a highly active photocatalyst for photodegradation of Reactive Black 5 dye

  • 1.

    Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Graduate Studies Building, University of Malaya, 50603 Kuala Lumpur, Malaysia

  • Corresponding author: Sharifah Bee Abd Hamid, 
  • Received Date: 11 June 2014
    Available Online: 20 August 2014

  • A nanocomposite UV-visible light-responsive multiwalled carbon nanotube (MWCNT)/titanium dioxide (TiO2) nanophotocatalyst was successfully synthesized by a modified sol-gel method using titanium isopropoxide and functionalized MWCNTs as the starting precursors. The photocatalytic activity of the TiO2 and the nanohybrid material was investigated through the photodegradation of Reactive Black 5 dye under ultraviolet light irradiation. X-ray diffraction analysis indicated that anatase phase was obtained for both the pure TiO2 and the MWCNT/TiO2 composite, while Raman spectroscopy confirmed the presence of MWCNTs in the composite. Field emission scanning electron microscopy revealed that TiO2 nanoparticles with an individual diameter of about 10-20 nm were coated on the surface of the MWCNTs. The specific surface areas of the samples were found to be 80 and 181 m2/g for the pure TiO2 and MWCNT/TiO2, respectively. As a result, MWCNT/TiO2 showed better photocatalytic performance than pure TiO2 because the high surface area of MWCNTs enabled them to function as good electron acceptors for the retardation of electron-hole pair recombination.
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