【摘要】 用钛酸丁酯为钛源,无水乙醇为溶剂,以玻璃珠为载体,采用溶胶-凝胶法及浸渍提拉工艺制备不同煅烧温度下的TiO₂薄膜材料.研究煅烧温度、紫外光照时间、负载次数、薄膜使用量、水样pH值等因素对TiO₂薄膜材料光催化降解氨氮活性的影响.实验表明:在薄膜负载6次,退火温度550℃,水样pH值为4,催化反应时间120 min等最佳实验条件下,TiO₂薄膜光催化降解氨氮的降解效率可达74.4%.重复使用会在一定程度上减弱TiO₂薄膜的光催化活性,经过光催化活性恢复实验后可恢复至新样品的93%.更多还原

【Abstract】 The TiO₂ film materials were prepared under different calcination temperature by the sol-gel method and dip-coating technique. Tetrabutyl titanate,anhydrous ethanol and glass bead were used as titanium source,solvent and carrier,respectively. The influences of calcination temperature etc. on the TiO₂ film materials photocatalytic activity for ammonia nitrogen degradation were studied. The experimental results showed that the degradation efficiency of ammonia nitrogen catalyzed by TiO₂ film materials could reach74. 4% under the optimized conditions: TiO₂ film was coated for 6 times,annealing temperature of 550 ℃,exposure time of 120 min and p H of 4. The reuse of TiO₂ film materials might weaken the photocatalytic activity,however,the photocatalytic activity would recover to 93% after recovery treatments.更多还原