TiO2/ACF复合滤料光降解甲醛的实验研究

 以钛酸丁酯[Ti(OBu)4]为原料,用溶胶凝胶法制备纳米TiO₂溶胶,采用浸渍法将溶胶整理到活性炭纤维(ACF)滤料上,并对ACF滤料原样、整理样光催化氧化甲醛气体的性能进行静态、动态对比实验。静态实验中,弱光源条件下ACF滤料原样、整理样的甲醛净化率分别为33.3%、39.6%,在强光源条件下分别为38.6%,49.2%;动态实验中,弱光源条件下ACF滤料原样、整理样的甲醛净化率分别为69.9%、77.1%,在强光源条件下分别为77.1%,85.5%。证明纳米TiO₂在强光源和弱光源条件下均可以光降解甲醛。

Experimental study of photodegrading formaldehyde by TiO2/ACF filter

With [Ti(OBu)4] as raw materials,nanometer TiO2was prepared by using sol-gel process,then the sol was applied to ACF(Activated Carbon Fiber) filter material by soaking method.The static and dynamic comparative study of the original sample and treated sample of ACF filter material were carried out with respect to the photocatalysis and oxidation of formaldehyde gas.In the static experiment,the formaldehyde purification rate of the original and treated samples were 33.3% and 39.6% respectively in weak light conditions,and,38.6% and 49.2% in strong light conditions;in the dynamic experiment,the values were 69.9% and 77.1% in weak light conditions,and 77.1% and 85.5% in strong light conitions.It has proven that nanometer TiO2can photodegrade formaldehyde in both strong light and weak light conditions.