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The photocatalytic synthesis of o-aminophenol in methanol was investigated with N-doped TiO 2 nanoparticles under UV-light irradiation. The catalytic quantities of N-doped TiO 2 prepared by a simple modified sol-gel process with urea as nitrogen source rapidly reduced o-nitrophenol to the corresponding amine at room temperature.

A novel approach was proposed to synthesize benzo[d]oxazol-2(3H)-one by photoreduction of o-nitrophenol and cyclization with urea using C-doped TiO2 nanoparticles as photocatalyst which was prepared by a modified sol–gel method using glucose as carbon source.

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