SnO_2/钛酸钠纳米管降解甲醛的研究

Study on Photocatalytic Degradation of Formaldehyde by SnO_2/Sodium Titanate Nanotubes

用水热法制备SnO2/钛酸钠纳米管,并用其对甲醛进行光催化降解。应用分光光度法研究光照时间、甲醛浓度等对降解率的影响。并将钛酸钠纳米管和SnO2/钛酸钠纳米管对甲醛的降解效果进行了比较。结果表明,紫外灯照射2.5 h时,SnO2/钛酸钠纳米管对甲醛的降解率是钛酸钠纳米管降解率的1.5倍。甲醛浓度为0.541 5 mg/mL、H2O2浓度为198 mg/mL时,甲醛的降解率最高。SnO2提高了钛酸钠纳米管对甲醛的光催化降解活性。

SnO2/sodium titanate nanotubes were prepared using hydrothermal method.The effects of illuminative time and the concentration of formaldehyde on the degradation of formaldehyde were studied using spectrophotometric method and the degradation efficiency of single sodium titanate nanotubes and SnO2/sodium titanate nanotubes were compared.The results indicated that the degradation rate of formaldehyde by SnO2/sodium titanate nanotubes were twice higher than that by single titanate nanotubes under UV irradiation.When the concentration of formaldehyde was 0.541 5 mg/mL and H2O2 was 198 mg/mL,the degradation rate of formaldehyde was higher than that in other conditions.SnO2 increased the photocatalytic activity of sodium titanate nanotubes.