The selective photocatalytic conversion of benzyl alcohol to benzaldehyde was studied in aqueous medium, as alternative to common organic solvents, in combination with environmentally friendly conditions: metal-free catalysts based on graphitic carbon nitride (g-C₃N₄), natural pH, ambient temperature and pressure, and light emitting diodes (LEDs) as high efficient lighting source. g-C₃N₄ was synthesized by thermal condensation of dicyandiamide and the photocatalytic performance evaluated in terms of different post-treatment routes: thermal, mechanical and chemical. Several temperatures (400, 450 and 500 °C), times of mechanical treatment (1.5, 3.0 and 8.0 h) and protic acids (H₂SO₄, HCl and HNO₃) were tested. The post-treatments significantly enhance photocatalytic conversion and yield, with minimal compromise on selectivity. The photocatalyst obtained upon thermal pos-treatment of g-C₃N₄ at 500 °C, which had the better performance (66% conversion, 59% yield, and 90% selectivity at four hours of irradiation), was found to have the highest BET surface area (87 m² g⁻¹).

在环境友好的条件下，结合常见的有机溶剂，在水介质中研究了苄醇向苯甲醛的选择性光催化转化，方法是：基于石墨碳氮化物（gC ₃ N ₄）的无金属催化剂，自然pH，环境温度和压力，以及发光二极管（LED）作为高效的光源。通过双氰胺的热缩合反应合成gC ₃ N ₄，并根据不同的后处理路线（热，机械和化学）评估光催化性能。几种温度（400、450和500°C），机械处理时间（1.5、3.0和8.0 h）和质子酸（H ₂ SO ₄，HCl和HNO ₃）进行了测试。后处理显着提高了光催化转化率和产率，而对选择性的影响最小。发现在500°C下对gC ₃ N ₄进行热定型处理所获得的光催化剂具有更好的性能（66％的转化率，59％的产率和在照射4小时后的选择性为90％），具有最高的BET值。表面积（87m ²  g ^-1）。