纸载P-TiO_2光催化降解甲醛的影响因素研究

本文以牛皮纸作载体,用浸渍法制备了具有光催化作用的纳米P-TiO2光催化剂,对室内一定浓度的甲醛气体进行了降解实验研究。通过实验探讨了甲醛的初始浓度、催化剂的用量、湿度条件、溶胶pH值和金属离子的掺杂5个影响甲醛降解率的因素,结果采用美国interscan公司生产的4160型甲醛分析仪进行表征。实验结果表明,当甲醛的初始浓度约为1.53mg/m3,P-TiO2用量为11.94g,湿度约为52%,溶胶pH=5.01,掺杂6.00mL 0.20 mol/L Cu2＋离子时,甲醛的降解效果最好,最高可达93.50%,甲醛浓度降至0.0994mg/m3,达到了GB/T 18883—2002标准中规定的0.10 mg/m3。

Influencing Factors of Formaldehyde Photocatalytic Degradation by P-TiO_2 Loaded on Papers

Nano-P-TiO2 photocatalyst was prepared by dipping on carrier kraft paper,and the photocatalyst was used to degrade indoor formaldehyde gas.The factors affecting the degradation rate of formaldehyde gas such as the initial concentration of formaldehyde gas,the photocatalyst demand,the humidity,the pH value and metal ions doping were discussed.The results were expressed by 4160 type formaldehyde analyzer made by American Interscan Company.The experimental results showed that the best degradation rate of forma...