Abstract
MWCNTs/TiO2 nanocomposite was prepared by oxidising MWCNT in H2SO4/HNO3 then decorating it with TiO2-p25 nanopowder. The composites were characterised using XRD, TEM, FT-IR PL and UV-vis spectroscopy. The TEM images have shown TiO2 nanoparticles immobilised onto the sidewalls of the MWCNTs. The UV-vis spectrum confirms that the nanocomposites can significantly absorb more light in the visible regions compared with the commercial TiO2 (P25). The catalytic activity of these nanocomposites was determined by photooxidation of MB aqueous solution in the presence of visible light. The MWCNTs/TiO2 (1:3) mass ratio showed maximum degradation efficiency. However, its activity was more favourable in alkaline and a neutral pH than an acidic medium.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Hydrogen-Ion Concentration
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Methylene Blue / chemistry
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Methylene Blue / radiation effects*
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Microscopy, Electron, Transmission
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Nanocomposites / chemistry*
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Nanocomposites / ultrastructure
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Nanotubes, Carbon / chemistry*
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Nanotubes, Carbon / ultrastructure
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Photochemical Processes
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Photolysis
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Spectrophotometry
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Spectroscopy, Fourier Transform Infrared
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Titanium / chemistry*
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Titanium / radiation effects*
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X-Ray Diffraction
Substances
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Nanotubes, Carbon
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titanium dioxide
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Titanium
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Methylene Blue
Grants and funding
This work was financially supported by the Research Management Center (RMC), Universiti Putra Malaysia. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.