著者

野口 大介

出版者

長崎大学大学院工学研究科

雑誌

長崎大学大学院工学研究科研究報告 = Reports of Graduate School of Engineering, Nagasaki University (ISSN:18805574)

巻号頁・発行日

vol.50, no.95, pp.81-84, 2020-07

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Photocatalyzed oxidation reaction of organic compound (methylene blue; MB) by using titanium(IV) oxide (TiO2) nanoparticles and wind power to stir the solution with uses a hand-made propeller was carried out. As a first, to check the degree of reaction rate, MB was added to the aqueous solution with TiO2 nanoparticles and UV (ultraviolet rays) irradiation that changes its color of MB gradually resulted in proceeding the oxidation reaction by O2 in air. After that, calibration curve was made using UV-vis spectrometer which was used to determine the concentration of MB in the solution measuring its absorbance. Then the UV condition was changed with and without UV. As a result, it was revealed that with UV condition, the reaction rates of oxidation of MB were faster than without UV. The wind condition to stir the solution was also revealed with unexpected result; i.e., “Weak-power” wind to stir the solution accelerated the reaction rather than “Middle-power” one. The reason stirring by middle-power wind couldn't accelerate the reaction so far is supposed that hand-made propeller used to stir the solution is not strong enough to convey the power under the condition.