Bipolar pulsed electrical discharge for decomposition of methylene blue in aqueous TiO2 nanoparticle dispersions

The objective of this paper is to investigate the decomposition process of organic pollutants by liquid phase plasma. A bipolar pulsed power supply was used to generate discharges in the aqueous TiO2 nanoparticle dispersions. The applied voltage, pulse width, and frequency were 250 V, 5 micros, and...

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Published inJournal of nanoscience and nanotechnology Vol. 13; no. 3; p. 1966
Main Authors Kim, Byung Hoon, Kim, Sun-Jae, Chung, Minchul, Ahn, Ho-Geun, Lee, Heon, Park, Sung Hoon, Jung, Sang-Chul
Format Journal Article
LanguageEnglish
Published United States 01.03.2013
Subjects
Metal Nanoparticles
Methylene Blue - chemistry
Titanium - chemistry
Water - chemistry
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Summary:The objective of this paper is to investigate the decomposition process of organic pollutants by liquid phase plasma. A bipolar pulsed power supply was used to generate discharges in the aqueous TiO2 nanoparticle dispersions. The applied voltage, pulse width, and frequency were 250 V, 5 micros, and 30 kHz, respectively. Properties of generated plasma were investigated by electrical and optical emission spectroscopy methods. The comparison of properties of the discharge operated with and without oxygen gas bubbling is shown. The results of electrical-discharge degradation of methylene blue showed that the decomposition rate increased with the TiO2 particle dosages. Addition of oxygen gas bubbles also increased the degradation rate of methylene blue.
ISSN:1533-4880
1533-4899
DOI:10.1166/jnn.2013.6972