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Author: search.filters.author.Mangkornkarn, Chayangkoon

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    Fabrication of Anodic Titanium Oxide (ATO) for waste water treatment application
    (2017-01-01)
    Choksumlitpol, Pimsuree
    ;
    Mangkornkarn, Chayangkoon
    ;
    Sumtong, Peerawith
    ;
    Onlaor, Korakot
    ;
    Eiad-Ua, Apiluck
    In this study, forming of Anodic Titanium Oxide (ATO) that has a nanoporous and nanotube morphology was studied for waste water treatment application. Nanoporous anodic titanium oxide was obtained by anodization, using ethylene glycol merging with ammonium fluoride at room temp as electrolyte. The variables of the process were anodization time (5, 10, 15 and 20 min) and anodization voltages (20, 40 and 60 V). Field emission scanning electron microscopy revealed that separated nanotubes became obvious when the voltage is high. The samples with different ATO conditions were investigated by the degradation of methylene blue under UV light irradiation. It was found that the activity of the photocatalysis of ATO was significantly enhancement of the degradation of methylene blue. These results suggest that ATO/UV photocatalysis as a method for treatment of diluted waste waters in textile industries.
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    Effect of anodizing voltage on anodic titanium dioxide (ATO) growth based on an ethylene glycol solution containing NH4F
    (2016-01-01)
    Mangkornkarn, Chayangkoon
    ;
    Samransuksamer, Benjarong
    ;
    Horprathum, Mati
    ;
    Eiamchai, Pitak
    ;
    Eiad-Ua, Apiluck
    We reported on the influence of applied voltage on the surface morphology of anodic titanium dioxide (ATO) thin films. At first, titanium (Ti) thin films were prepared by DC-magnetron sputtering for use as a base material in the anodization process. The titanium dioxide (TiO<inf>2</inf>) nanoporous ATO was fabricated by the anodization process from the Ti thin film, with different applied voltages from 20 V to 60 V in an electrolyte based on an ethylene glycol containing NH<inf>4</inf>F. Pore size distribution of ATO thin films can be varied from 20-50 nm by increasing the applied voltage, while the thickness of the film also increases. In addition, to observe the effect of time, the optimal condition of anodizing voltage was studied by increasing the anodizing time. The results clearly showed the nanoporous ATO over the films and the thickness of the nanoporous ATO is approximately 260 nm.