Presentation Information
[20a-B3-4]Enhanced Photocatalytic Activity of Zinc Oxide Nanoparticles
Annealed with Chitosan/Citric Acid
〇Kotaro Kunimoto1, Retsuo Kawakami1, Shin-ichiro Yanagiya1,2, Yoshitaka Nakano3, Masahito Niibe4 (1.Tokushima Univ., 2.pLED, Tokushima Univ., 3.Chubu Univ., 4.The Univ. Tokyo)
Keywords:
zinc oxide,chitosan,citric acid
In recent years, the risk of various infectious diseases has increased. To address this problem, we focused on semiconductor photocatalysts that have bactericidal and antibacterial properties only by light irradiation. ZnO is particularly attractive because of its antimicrobial properties and low cost. However, ZnO has a large band gap (3.2-3.4 eV), low reactivity under visible light irradiation, and high recombination rate due to its direct transition type.
We focused on carbon doping of ZnO with chitosan (CS) and citric acid (CA) as carbon sources, because CS and CA have antimicrobial properties as well, and the addition of CA is expected to enhance the solubility of CS.
In this study, we report on the enhancement of photocatalytic activity of ZnO under visible light by annealing (AN) of CS/CA. In particular, we have clarified the mixing ratio of organic matter (CS/CA) that enhances the photocatalytic activity.
We focused on carbon doping of ZnO with chitosan (CS) and citric acid (CA) as carbon sources, because CS and CA have antimicrobial properties as well, and the addition of CA is expected to enhance the solubility of CS.
In this study, we report on the enhancement of photocatalytic activity of ZnO under visible light by annealing (AN) of CS/CA. In particular, we have clarified the mixing ratio of organic matter (CS/CA) that enhances the photocatalytic activity.
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