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http://dx.doi.org/10.12925/jkocs.2012.29.3.13

Preparation of $N-TiO_2$ Photocatalysts and Activity Test  

Kang, Young-Gu (Department of Chemical Engineering, Myongji University)
Shin, Ki-Seok (Department of Chemical Engineering, Myongji University)
Ahn, Sung-Hwan (Department of Chemical Engineering, Myongji University)
Hahm, Hyun-Sik (Department of Chemical Engineering, Myongji University)
Publication Information
Journal of the Korean Applied Science and Technology / v.29, no.3, 2012 , pp. 466-472 More about this Journal
Abstract
Visible-light-responding photocatalysts, $N-TiO_2$, were prepared by nitrogen doping onto $TiO_2$. The crystalline structure and morphology, doping state of the prepared photocatalysts were characterized by XRD, FE-SEM, and XPS. The activity of the prepared photocatalysts was examined by the decomposition of methyleneblue. The prepared catalysts were anatase type and the crystallinity was increased with pH. The particle sizes of the prepared catalysts were 5.42, 5.99, 7.58 nm at pH 2.2, 4.7, 9.0, respectively. The particle sizes of the prepared catalysts were slightly increased with pH. The activity of the photocatalysts was directly proportional to the crystallinity of the catalysts. $N-TiO_2$ prepared by nitrogen doping onto $TiO_2$ showed activity under visible light. The doped nitrogen was located not in the lattice but on the surface.
Keywords
photocatalyst; $N-TiO_2$; nitrogen doping; methyleneblue decomposition;
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