复合光催化材料降解气相中甲苯和二甲苯中间产物的评价

将Sol-Gel法制得的二氧化钛(TiO2)负载到活性碳纤维(ACF)上,利用超临界干燥手段和高温真空煅烧工艺,获得了具有气凝胶特性和高光催化活性的复合材料(TiO2-ACF)。由于该材料在降解空气中甲苯和二甲苯的过程中降解速度逐渐变缓,因此通过提取反应物并利用色谱—质谱联用分析方法,确定该光催化复合材料在降解甲苯和二甲苯720 min后是否有中间产物产生。试样结果证明,只有还未参加反应的甲苯和二甲苯而不存在中间产物。

Evaluation of Intermediate Product on Degradation Toluene and Xylene by TiO2-ACF Photocatalytic Material

Photocatalytic d dioxide （TiO2） loaded on egradation of toluene and xylene activated carbon fibers （ACF）. in the air was investigated using titanium The TiO2 and ACF combination （TiO2 - ACF） was prepared by sol -gel, following by supercritical fluid CO2 dry process and calcinations under the vacuum . Because the photocatalytic reaction process, the degradation speed become slowly. So by extraction reactant and using GC - MS analytical method, to ensure that intermediate exist or not in TiO2 - ACF after reacting 720min. The result indicated that intermediate was inexistent and only toluene and xvlene exist in TiO2 -ACF.