掺杂Fe3+纳米TiO2膜光催化降解VOCs

利用玻璃弹簧负载TiO_2膜光催化降解VOCs,以室内空气污染物甲醛、丙酮和甲苯为目标污染物,采用自制反应器,分析了初始浓度、空气湿度和气体流量对甲苯降解效果的影响,考察了三种物质混合的降解效果,对比了在相同条件下单一甲苯和VOCs中甲苯的降解效果。结果表明,气体流速5 L·min~(-1)时,甲苯的降解效率为74.6%,空气湿度为30%时,甲苯降解率为81.6%,初始浓度为0.173 mg·L~(-1)时,甲苯降解率为94%,在这三种情况下,甲苯降解效果较好;对VOCs中甲苯和单一甲苯的降解效果进行对比,发现混合气体中甲苯的降解率在反应205 min后高于单一甲苯。

Photocatalytic degradation of VOCs on TiO2 films doped with Fe3+

Photocatalytic degradation of VOCs over glass spring supported TiO2 film was studied, using formaldehyde, acetone and toluene as the model pollutants. Influence of initial concentration, air relative humidity and gas flow rate on the degradation efficiency of toluene was investigated, with toluene degradation rate of 74.6% under gas flow rate of 5 L·min^-1, 30% under air relative humidity of 30% , and 94% under initial concentration 0. 173 mg·L^-1 The degradation rate of solely toluene and toluene in mixed VOCs was investigated, too, with higher toluene degradation rate for solely toluene than for toluene in mixed VOCs after 205 min treatment.