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采用溶胶-凝胶法制备了钒-氮共掺杂TiO2光催化剂,对苯酚溶液进行了光催化降解试验研究,考察了在模拟太阳光条件下,pH、曝气量、苯酚溶液初始和催化剂投加量对钒-氮共掺杂TiO2光催化剂降解苯酚溶液的影响。结果表明,在试验条件下,以800 W氙灯为光源,反应溶液pH=6,曝气体积流量75 mL/min,苯酚溶液初始质量浓度小于80mg/L,催化剂投加量1.5 g/L时,苯酚溶液降解率最高;钒-氮共掺杂TiO2光催化剂重复使用7次后,对苯酚的光催化活性没有明显下降,具有良好的重复使用性。可为钒-氮共掺杂TiO2的应用推广提供依据。
The vanadium-nitrogen co-doped TiO2 photocatalyst was prepared by sol-gel method, and the photocatalytic degradation of phenol solution was studied. The effects of pH, aeration, initial phenol solution and catalyst concentration Effect of dosage on degradation of phenol solution by vanadium - nitrogen co - doped TiO2 photocatalyst. The results showed that when the initial concentration of phenol solution was less than 80 mg / L and the dosage of catalyst was 1.5 g / L under the conditions of 800 W xenon lamp as light source, the reaction solution pH = 6, aeration volume flow rate of 75 mL / min, The degradation rate of phenol solution was the highest. After repeated use of vanadium-nitrogen co-doped TiO2 photocatalyst for 7 times, the photocatalytic activity of phenol was not significantly decreased, and had good reusability. It can provide the basis for the application of vanadium-nitrogen co-doped TiO2.