Effect of Carbon and Nitrogen Modified TiO₂ on Photoluminescence Property and Photocatalytic Activity

Abstract:

Carbon (C) and Nitrogen (N) modified TiO₂ photocatalysts were prepared by using two different precursors namely peat and urea using commercial TiO₂-P25. The results from HR-TEM and XPS analyses shows different interactions between C-TiO₂ and N-TiO₂ photocatalysts where C is only coated on top of TiO₂ while N is chemically bonded in TiO₂ particle. Higher photocatalytic activity for both C and N modified TiO₂ were observed under degradation of reactive red 4 dye (RR4) with the degradation rate were c.a 2.5 and 2.7 times faster compared with pristine TiO₂. The photoluminescence (PL) analysis data showed the lowest PL intensity over C coated TiO₂ followed by pristine TiO₂ while N doped TiO₂ exhibited the highest PL intensity. The lowest PL intensity of C coated TiO₂ was due to the presence of C as electron acceptor while the highest PL intensity for N doped TiO₂ was due to the oxygen vacancies and TiO₂ defect structure.

• Periodical: Applied Mechanics and Materials (Volumes 754-755)
• Pages: 1197-1201
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.754-755.1197
• Online since: April 2015
• Authors: Wan Izhan Nawawi*, M.A. Nawi, Mohd Azlan Mohd Ishak
• Keywords: Carbon, Nitrogen, Photocatalytic Activity, Photoluminescence (PL), TiO₂

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