Abstract: Macro-mesoporous N-doped TiO2 photocatalysts were directly prepared by a sol-gel technique with a block copolymer as template and formamide as solvent. The microstructure, band gap, and photocatalytic activity of the materials were mainly affected by the concentration of the template. When its concentration was 11%, the band gap was 2.76 eV, and the degradation of methyl orange reached 93.2% after 120 min.

Key words: block copolymer, formamide, titanium dioxide, nitrogen doping, macropore, mesopore, methyl orange, photocatalytic degradation