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Microwave Treated Bentonite Clay Based TiO2 Composites: An Efficient Photocatalyst for Rapid Degradation of Methylene Blue

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The composites of TiO2 and bentonite were synthesized under microwave conditions. Formation of anatase TiO2 nanoparticles was achieved within 10 minutes by microwave treatment at 180 °C on the clay surface. Phase composition, particle morphology, specific surface area, chemical bonding etc. of these samples were characterized by using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), nitrogen gas adsorption method (BET) and fourier transform infrared spectroscopy (FTIR). The photo catalytic activity of the as prepared material to degrade methylene blue resulting in complete photomineralization to CO2 and H2O was monitored by UV-Vis spectroscopy and gas chromatography. The effect of TiO2 content on the photocatalytic activity was also investigated. Bentonite containing 50% TiO2 by weight showed the highest photocatalytic activity because of its relatively large specific surface area and pore volume. Overall our findings show that the photocatalytic activity of resulting composite is more efficient than commercial nano-TiO2 and thus could therefore be an economic competitive candidate for contaminated water remediation.
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Keywords: Collapsed Bentonite; Composites; Dye; Microwave Synthesis; Photocatalytic Degradation; TiO2

Document Type: Research Article

Affiliations: School of Chemistry and Biochemistry, Thapar University, Patiala 147004, India

Publication date: 2017-02-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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