【摘要】 采用浸渍法将纳米TiO2颗粒负载在蜂窝活性炭(ACH)表面制备出光催化网ACH/TiO2,在自制光催化反应器中38 nm波长紫外光激发下进行甲苯的动态催化降解实验.结果表明,ACH和TiO2具有良好的协同效应,能将可降解甲苯初始浓度从160 mg/m3提高至830 mg/m3.在ACH/TiO2中TiO2含量12.5%±1%(ω)、反应器内湿度30%、甲苯初始浓度410mg/m3及气体流速1L/min的条件下,ACH/TiO2降解甲苯气体效果最佳,降解率达90.0%.水蒸气影响光催化降解甲苯气体,在稳定气流下光照降解甲苯气体效率可在6h内维持稳定.更多还原

【Abstract】 TiO2 nano-particles were immobilized on activated carbon honeycomb(ACH) by impregnation method to prepare ACH/TiO2 photocatalyst. Experiments on dynamic photocatalytic degradation of toluene gas under UV excitation wavelength of 387 nm in a self-made photocatalytic reactor were carried out. The results indicated that ACH/TiO2 had a good synergistic effect, which could increase the degradation of initial concentration of toluene from 160 to 830 mg/m3. Moreover, the degradation rate of toluene could maintain the best level(90.0%) under the conditions of TiO2 in ACH/TiO2 12.5%±1%(ω), initial concentration of toluene 410 mg/m3, relative humidity 30% and gas flow rate 1 L/min, respectively. Water vapor could affect the photocatalytic degradation of toluene gas. The degradation rate of toluene could be kept unchanged for 6 h under illumination with the flow stability.更多还原