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Photo-catalytic Degradation on B-, C-, N-, and F Element co-doped TiO2 under Visible-light Irradiation  

Bai, Byong Chol (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University)
Im, Ji Sun (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University)
Kim, Jong Gu (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University)
Lee, Young-Seak (Department of Fine Chemical Engineering Applied Chemistry, Chungnam National University)
Publication Information
Applied Chemistry for Engineering / v.21, no.1, 2010 , pp. 29-33 More about this Journal
Abstract
In this study, boron, carbon, nitrogen and fluorine co-doped $TiO_{2}$ photocatalysts using tetraethylammonium tetrafluoroborate (TEATFB) have been prepared by different heat treatment temperatures to decrease the band gap. To explore the visible light photocatalytic activity of the novel low‐zband gap $TiO_{2}$ photocatalyst, the removal of two dyes was investigated, namely, acridine orange and rhodamine B. XRD patterns demonstrate that the samples calcined at temperatures up to $800^{\circ}C$ clearly show anatase peaks. The XPS results show that all the doped samples contain N, C, B and F elements and the doped $TiO_{2}$ shows the shift in the band gap transition down to 2.98 eV as UV-DRS results. In these UV-Vis results, photocatalytic activity of the doped $TiO_{2}$ is 1.61 times better than undoped $TiO_{2}$. Specially, excellent photoactivity results were obtained in the case of samples treated at $700^{\circ}C$.
Keywords
titania; co-doping; photocatalysts; solar light; band gap;
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