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Surface Modification of TiO2 Thin Films by N2 Atmospheric Plasma and Evaluation of Photocatalytic Activity  

Lim, Gyeong-Taek (Research Institute for Catalysis and Center for Photonic Materials and Devices, Chonnam National University)
Kim, Kyung Hwan (Department of Advanced Chemicals and Center for Functional Nano Fine Chemicals, Chonnam National University)
Park, Jun (Department of Advanced Chemicals and Center for Functional Nano Fine Chemicals, Chonnam National University)
Kim, Kyoung Seok (Department of Advanced Chemicals and Center for Functional Nano Fine Chemicals, Chonnam National University)
Park, Yu Jeoung (Department of Advanced Chemicals and Center for Functional Nano Fine Chemicals, Chonnam National University)
Song, Sun-Jung (Department of Advanced Chemicals and Center for Functional Nano Fine Chemicals, Chonnam National University)
Kim, Jong-Ho (Research Institute for Catalysis and Center for Photonic Materials and Devices, Chonnam National University, Department of Advanced Chemicals and Center for Functional Nano Fine Chemicals, Chonnam National University)
Cho, Dong Lyun (Research Institute for Catalysis and Center for Photonic Materials and Devices, Chonnam National University, Department of Advanced Chemicals and Center for Functional Nano Fine Chemicals, Chonnam National University)
Publication Information
Applied Chemistry for Engineering / v.20, no.4, 2009 , pp. 402-406 More about this Journal
Abstract
$TiO_2$ thin films were surface-modified with atmospheric plasma and their photocatalytic activities were evaluated. The films were deposited on glass plates by dip-coating in a $TiO_2$ sol-gel solution and sintered at various temperatures for various times. Nitrogen plasma was used for the modification and the experiments were carried out varying operational parameters such as discharge power and treatment time. Photocatalytic activity was evaluated based on the degradation efficiency of methylene blue (MB) under irradiation of UV-A and fluorescent light. According to XPS analysis, a little amount of nitrogen was found to be doped in the film surface after the modification. As a result, photocatalytic activity increased under irradiation of UV-A and fluorescent light, especially fluorescent light.
Keywords
atmospheric plasma; surface modification; nitrogen doping; $TiO_2$ film; photocatalytic activity;
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