(121h) N Doped TiO2 nanoparticles Synthesized By One Step Liquid Flame Aerosol Method (LFSP): Understanding the Effect of Synthesis Parameters and Photocatalytic Degradation of VOCs

Environmental photocatalysis Nitrogen doped titanium dioxide is attracting a continuously increasing. Conventional wet synthesis methods need multiple processing steps, high energy input and long processing times, In contrast, flame synthesis, especially liquid flame spray pyrolysis (LFSP), is a versatile one-step process for synthesizing a variety of anion doped nanoparticles. Nitrogen-doped TiO­₂ nanoparticles (NPs) are prepared using novel fast single-step flame synthesis. A combination of various physico-chemical characterizations were performed. The photocatalytic activity and stability of the N-doped TiO₂ samples were evaluated through using the decomposition of phenol as model reaction under visible light irradiation. Characterization results show that the nitrogen dopants have a significant effect on the crystallite size and optical absorption of TiO₂. It is found that the N-doped TiO₂ catalysts have enhanced absorption in the visible light region, and exhibit higher activity for photocatalytic degradation of VOCs. We have produced The UV-vis spectroscopy results of N incorporated TiO₂ showed enhancement of light absorption in the visible range by selected composite materials in the UV range (250-400 nm). We have found the Ti/N ratio of 11% for the materials synthesized from our XPS data. To the best of our knowledge, this is the first report which demonstrates single-step, direct flame synthesis of N-doped TiO₂ and their application as a photocatalyst better performance. The method is extremely simple, low cost, energy efficient, very effective, and can be easily scaled up for large scale production. These interesting results will be discussed in the presentation.