During the recent years, g-C₃N₄/TiO₂ composites have been regarded as efficient photocatalysts for the removal of air pollutants. The combination of these materials gives excellent photocatalytic performances, as each ones advantage covers the disadvantages of the other. In the present study, g-C₃N₄/TiO₂ heterostructures were synthesized by mixing chemically exfoliated g-C₃N₄ with commercial TiO₂ P25 in different ratios and were examined for the removal of NO_x and acetaldehyde under visible-light irradiation. The results of photocatalytic tests in correlation with the EPR experiments revealed that heterostructures containing higher amount of TiO₂ are efficient in systems where the attack of hydroxyl radicals prevails (acetaldehyde), while dominant g-C₃N₄ content provides effectiveness in systems where superoxide radical anions play the key role (NO_x). This outcome is directly coupled with the energy positions of conduction- and valence-band edges of each material.

近年来，gC ₃ N ₄ / TiO ₂复合材料被认为是用于去除空气污染物的有效光催化剂。这些材料的组合可提供出色的光催化性能，因为每个优点都覆盖了另一个缺点。在本研究中，GC ₃ Ñ ₄ /二氧化钛_2个异质结构通过混合化学剥离的GC合成₃ Ñ ₄与商业的TiO ₂ P25以不同比例并检查用于去除NO的_X和乙醛在可见光照射下。与EPR实验相关的光催化测试结果表明，含有较高含量TiO _2的异质结构在占主导地位的羟基自由基（乙醛）的体系中是有效的，而占主导地位的gC ₃ N ₄含量在超氧自由基阴离子的体系中具有有效性发挥关键作用（NO _x）。该结果与每种材料的导带和价带边缘的能量位置直接相关。