Herein, two-dimension (2D) δ-MnO₂-modified porous g-C₃N₄/micro-mesoporous titanium phosphate (MO-CN/TiP) nanocomposites have been controllably fabricated by a two-step solvothermal process. The amount-optimized MO-CN/TiP nanocomposite exhibits greatly improved photocatalytic CO oxidation performance (87%) compared with corresponding bare TiP and CN/TiP, even superior to the commercial P25 TiO₂. Based on the experimental results of time-resolved surface photovoltage responses, photocurrent action spectra, and electron paramagnetic resonance signals, it is clearly confirmed that the exceptional photoactivity is mainly attributed to the great promotion in the Z-scheme charge transfer in resultant dimension-matched CN/TiP nanocomposite and in the O₂ activation via the modified MO. The porous structure favorable to increase the specific surface areas and to facilitate the mass diffusion and the extended visible-light absorption also contribute to the photoactivity enhancement. Moreover, it is uncovered by the in-situ diffuse reflectance fourier transform infrared spectra that CO is previously adsorbed by the formed OHOC intermediate with the surface hydroxyls and then oxidized.

在此，已经通过两步溶剂热法可控地制备了二维（2D）δ- MnO ₂改性的多孔gC ₃ N ₄ /微介孔磷酸钛（MO-CN / TiP）纳米复合材料。与相应的裸TiP和CN / TiP相比，量优化的MO-CN / TiP纳米复合材料表现出大大改善的光催化CO氧化性能（87％），甚至优于商用P25 TiO ₂。根据时间分辨的表面光电压响应，光电流作用谱和电子顺磁共振信号的实验结果，可以清楚地证明，出色的光活性主要归因于Z方案电荷转移的极大促进，从而导致尺寸匹配。 CN / TiP纳米复合材料并通过修饰的MO激活O ₂。有利于增加比表面积并促进质量扩散和扩展的可见光吸收的多孔结构也有助于提高光活性。此外，通过原位漫反射傅立叶变换红外光谱发现，CO事先已被形成的OH吸附。OC与表面羟基中间体，然后被氧化。