標題: The photocatalytic degradation of methylene blue by green semiconductor films that is induced by irradiation by a light-emitting diode and visible light
作者: Yang, Chih-Chi
Doong, Ruey-An
Chen, Ku-Fan
Chen, Giin-Shan
Tsai, Yung-Pin
環境工程研究所
Institute of Environmental Engineering
公開日期: 1-Jan-2018
摘要: This study develops a low-energy rotating photocatalytic contactor (LE-RPC) that has Cu-doped TiO2 films coated on stainless-steel rotating disks, to experimentally evaluate the efficiency of the degradation and decolorization of methylene blue (MB) under irradiation from different light sources (visible 430 nm, light-emitting diode [LED] 460 nm, and LED 525 nm). The production of hydroxyl radicals is also examined. The experimental results show that the photocatalytic activity of TiO2 that is doped with Cu2+ is induced by illumination with visible light and an LED. More than 90% of methylene blue at a 10 mg/L concentration is degraded after illumination by visible light (430 nm) for 4 hr at 20 rpm. This study also demonstrates that the quantity of hydroxyl radicals produced is directly proportional to the light energy intensity. The greater the light energy intensity, the greater is the number of hydroxyl radicals produced.
URI: http://dx.doi.org/10.1080/10962247.2017.1358222
http://hdl.handle.net/11536/144866
ISSN: 1096-2247
DOI: 10.1080/10962247.2017.1358222
期刊: JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
Volume: 68
起始頁: 29
結束頁: 38
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