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http://dx.doi.org/10.9713/kcer.2019.57.3.331

Brief Review on the preparation of N-doped TiO2 and Its Application to Photocatalysis  

Oh, Kyeongseok (Department of Chemical and Environmental Technology, Inha Technical College)
Hwang, Duck Kun (Corporate Diagnosis & Technology Department, Korea SMEs and Startups Agency)
Publication Information
Korean Chemical Engineering Research / v.57, no.3, 2019 , pp. 331-337 More about this Journal
Abstract
Titania has become the most applicable material for photocatalytic application. Nevertheless, titania has the weak point in its wide band gap energy that is mainly activated by UV irradiation. There have been vast research challenges in order to make the wide band gap energy of titania narrow that could be activated in the presence of visible light. Various modifications of titania surface were popular because titania needs to change its surface to respond in visible light. Among the methodological approaches, N-doping to titania can be the alternative candidate because it is facile process and eco-friendly. The activated electron from valence band in N-doped $TiO_2$ migrates to conduction band in the presence of visible light irradiation, which shows photocatalytic activity as well. In this study, focused on the evaluation of nitrogen state after N-doping through brief review. Arguments are still existed in nitrogen states and their different effects on photocatalytic activity. In particular, two nitrogen states are generally reported; substitutional and interstitial states. The research articles regarding N-doped $TiO_2$ are continuously appearing because the potential application of water split in visible light is still fascinate. The future of N-doped $TiO_2$ is also presented by referrals based on various literature.
Keywords
N-doped $TiO_2$; Photocatalyst; Visible light; Band gap energy;
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