玻璃弹簧负载TiO2光催化降解甲醛的影响因素

利用自制间歇式光催化气体反应器体系作为反应场所，以玻璃弹簧负载TiO₂溶胶作催化剂，在紫外光照射下降解室内污染气体甲醛，探讨了催化剂的酸度、反应器内湿度、甲醛气体浓度和反应时间等因素对甲醛降解率的影响.结果表明:玻璃弹簧负载TiO₂并经pH5的蒸馏水酸浸后作催化剂对甲醛的降解效果最好，90 min内降解率达到57.26%；反应器内的湿度约为50%时甲醛降解率最高，反应90 min时达到82.20%；在0.46～8.10 mg/m3内，初始ρ(甲醛)为5.51 mg/m3时的降解率最高，150 min内达95.10%；延长反应时间，甲醛降解率上升幅度逐渐减小；通过计算降解后甲醛的残余量可知，TiO₂光催化方法可以有效降解甲醛，并能使0.46 mg/m3以内的ρ(甲醛)在150 min内达到国家标准. 

Factors Influencing Formaldehyde Photocatalytic Degradation by Titanium Dioxide Deposited on Glass Springs

This paper studied a newly manufactured intermittent photocatalytic gas reactor system by which the photocatalytic degradation of formaldehyde gas occurs by TiO_2 deposited on glass springs.The main controlling factors which affect the degradation rate of formaldehyde,such as the acidity of catalyst,the humidity in the reactor,the mass concentration of formaldehyde and the reactive time were discussed.The results showed that the degradation rate of formaldehyde could reach 57.26% in 90 minutes when the glas...