Photocatalytic Performance and Mechanism Study of High Specific Area TiO _\textbf2 Combined with g-C _\textbf3 N _\textbf4

g-C₃N₄ coupled with high specific area TiO₂ (HSA-TiO₂) composite was prepared by a simple solvothermal method, which was easy to operate with low energy consumption. Degradation of methyl orange test results showed that HSA-TiO₂ effectively improved the photocatalytic activity effectively. Photoelectrochemical test results indicated that the separation of photo-generated carriers and the charge carrier migration speed of TiO₂ were improved after combination with g-C₃N₄. g-C₃N₄/HSA-TiO₂ showed strong photocatalytic ability. The degree of degradation of methyl orange by 6%-g-C₃N₄/HSA-TiO₂ could reach up to 92.44%. Furthermore, it revealed good cycle performance. The photocatalytic mechanism of g-C₃N₄/HSA-TiO₂ was proposed.