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采用溶胶-凝胶法在不锈钢丝网上负载TiO2薄膜,通过SEM、XRD和TG-DTA对其进行表征.研究了聚乙二醇(PEG)分子量及添加量、水加入量、涂膜次数和煅烧温度等工艺条件对样品光催化降解甲醛性能的影响.结果表明,通过工艺条件控制可得具有较高光催化活性的负载型TiO2光催化薄膜.在钛酸丁酯乙醇溶液中添加适量PEG600和水,经反应制备的TiO2溶胶,涂膜于不锈钢丝网表面,450℃煅烧后获得具有中孔结构的TiO2混晶薄膜,该薄膜对甲醛光催化降解率达90%以上.
The TiO2 thin films were coated on stainless steel wire mesh by sol-gel method and characterized by SEM, XRD and TG-DTA. The effects of PEG molecular weight and loading, water addition, Temperature and other technological conditions on the photocatalytic degradation of formaldehyde samples.The results show that the photocatalytic activity of the supported TiO2 photocatalytic film can be obtained by controlling the process conditions in butyl titanate ethanol solution was added an appropriate amount of PEG600 and water, The titania sol prepared by the reaction was coated on the surface of a stainless steel mesh and calcined at 450 ° C. to obtain a TiO2 mixed crystal film with a mesoporous structure. The photocatalytic degradation rate of formaldehyde on the film was over 90%.