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Title: Fabrication of an Inexpensive and High Efficiency Microphotoreactor Using Co2 Laser Technique for Photocatalytic Water Treatment Applications
Journal: Environmental technology
Author: 1. Hamed Eskandarloo, Alireza Badiei
Year: 2015
Address: 1. School of Chemistry, College of Science, University of Tehran, Tehran, Iran
Abstract: In this study, a microphotoreactor with catalyst immobilized microchannels was designed and fabricated using CO2 laser as a simple and inexpensive technique. The microphotoreactor is composed of an array of microchannels, a quartz plate, and an array of UV–LEDs. The microchannels with dimension of 400 μm width, 50 μm depth, and 80 cm length was inscribed on a flat plate of poly(methyl methacrylate) (PMMA). The illuminated specific surface area for the designed microreactor was calculated to be 25000 m–1. To examine the performance of miniaturized photoreactor, the photocatalytic degradation of 4–Nitrophenol as a refractory pollutant was investigated. The effects of operational variables on the performance of microphotoreactor were studied. The higher photocatalytic degradation is obtained for low flow rates, high light intensities, long microchannels lengths, and low inlet concentrations. Also, the performance of microphotoreactor was examined in the presence of different types of TiO2 catalysts with an average particle size between 5 to 27 nm (such as P25, PC500, Merck, and UV100) and textile dyes with different chemical structures (such as Acid Orange 7, Acid Violet 19, Basic Red 46, Methyl Orange, and Malachite Green). Finally, the reusability of miniaturized photoreactor was evaluated and the results showed satisfactory stability and reusability for the designed microreactor in photocatalytic degradation of organic pollutants.
Keywords: Microphotoreactor; Inexpensive fabrication; Immobilized microchannel; Photocatalytic degradation; UV–LEDs
Application: Water Treatment
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URL:"" & "/doi/abs/10.1080/09593330.2014.974681"#