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Synthesis and characterization of anatase-coated multiwall carbon nanotube for improvement of photocatalytic activity

Kordhaghi, F ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.5829/idosi.ije.2017.30.04a.12
  3. Publisher: Materials and Energy Research Center , 2017
  4. Abstract:
  5. Sol-gel technique was used to coat multiwall carbon nanotubes (MWCNTs) with anatase titania to increasing the surface area and improve the photocatalytic activity of TiO2. Room temperature ballistic conduct of MWCNT combined with semiconducting behavior of anatase brought about a photocatalytic improvement of ∼37 % with respect to the highest methyl orange decolorization flair. For characterization and photocatalytic efficiency determination, X-ray diffraction (XRD), field emission (FE) scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), diffuse reflectance spectroscopy (DRS) and ultraviolet visible (UV-vis) spectroscopy were rehearsed. Attachment of anatase nanoparticles onto 30 wt % functionalized CNTs resulted in 99.72% methyl orange decolorization by 160 min irradiation with 8 W ultraviolet lamp. This value was fourfold greater than pure TiO2 nanoparticles and much greater than the values reported in the literature. This improvement was attributed to larger surface area, lower charge recombination and superior crystal structure and stimulated visible-light shifting due to presence of Ti-O-C bond. © 2017, Materials and Energy Research Center. All rights reserved
  6. Keywords:
  7. Anatase ; Carbon nanotube ; Nano-photocatalyst ; Nanocomposite ; Titanium dioxide ; Azo dyes ; Carbon nanotubes ; Citrus fruits ; Crystal structure ; Nanocomposites ; Nanoparticles ; Nanotubes ; Photocatalysis ; Photocatalysts ; Scanning electron microscopy ; Sol-gels ; X ray diffraction ; X ray photoelectron spectroscopy ; Yarn ; Anatase nanoparticles ; Charge recombinations ; Diffuse reflectance spectroscopy ; Nano photocatalysts ; Photocatalytic activities ; Photocatalytic efficiency ; Semiconducting behavior ; Synthesis and characterizations ; Multiwalled carbon nanotubes (MWCN)
  8. Source: International Journal of Engineering, Transactions A: Basics ; Volume 30, Issue 4 , 2017 , Pages 543-550 ; 17281431 (ISSN)
  9. URL: http://www.ije.ir/Vol30/No4/A/abstract-2459.html