首页|Preparation of Nitrogen-doped TiO_2 Nanoparticle Catalyst and Its Catalytic Activity under Visible Light
Preparation of Nitrogen-doped TiO_2 Nanoparticle Catalyst and Its Catalytic Activity under Visible Light
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N-doped TiO_2 nanoparticle photocatalysts were prepared through a sol-gel procedure using NH_4Cl as the nitrogen source and followed by calcination at certain temperature. Systematic studies for the preparation parameters and their impact on the structure and photocatalytic activity under ultraviolet (UV) and visible light irradiation were carried out. Multiple techniques (XRD, TEM, DRIF, DSC, and XPS) were commanded to characterize the crystal structures and chemical binding of N-doped TiO_2. Its photocatalytic activity was examined by the degradation of organic compounds. The catalytic activity of the prepared N-doped TiO_2 nanoparticles under visible light (λ > 400nm) irradiation is evidenced by the decomposition of 4-chlorophenol, showing that nitrogen atoms in the N-doped TiO_2 nanoparticle catalyst are responsible for the visible light catalytic activity. The N-doped TiO_2 nanoparticle catalyst prepared with this modified route exhibits higher catalytic activity under UV irradiation in contrast to TiO_2 without N-doping. It is suggested that the doped nitrogen here is located at the interstitial site of TiO_2 lattice.
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