采用响应面法对N掺杂改性光催化材料N-P25进行优化,提高其在可见光下的光催化活性。以亚甲基蓝作为目标降解物,对煅烧温度、煅烧时间、掺杂量3个因素进行单因素实验。根据单因素实验结果设计中心组合实验,采用响应面分析法确定最优条件。结果表明:煅烧温度为423℃,煅烧时间为2.6h,掺杂量为31%(与P25的质量比)时,NP25可见光催化活性最高,对亚甲基蓝的降解率达到62.21%,与预期值62.94%基本符合。 The response surface method was used to optimize the N-doped modified N-P25 photocatalyst and improve its photocatalytic activity in visible light. Taking methylene blue as the target degradation product, single factor experiments were carried out on the three factors of calcination temperature, calcination time and doping amount. According to the experimental results of single factor design center combination experiment, response surface analysis method to determine the optimal conditions. The results showed that when the calcination temperature was 423 ℃, the calcination time was 2.6h and the doping amount was 31% (mass ratio to P25), the photocatalytic activity of NP25 was the highest, the degradation rate of methylene blue reached 62.21%, which was 62.94% Basically consistent.