纳米TiO_2/β-环糊精涂布纸对二甲苯的光催化降解作用

Photocatalytic Degradation of Xylene by Nano-TiO_2/β-cyclodextrin Coated Paper

在自制的光催化装置中对涂覆纳米TiO2和纳米TiO2/β-环糊精两种涂料的涂布纸进行光催化性能研究,并对涂布原纸和光照前后的涂布纸进行物理性能检测。结果表明,3种纸样光催化降解效率顺序为:纳米TiO2/β-环糊精涂布纸>纳米TiO2涂布纸>涂布原纸,β-环糊精的加入对于纳米TiO2的光催化降解具有明显的协同促进作用;两种涂布纸在紫外光和室内自然光下对二甲苯气体都有一定的降解作用,其中紫外光的效果明显强于室内自然光;在室内自然光照射2周后,纳米TiO2/β-环糊精涂布纸可将浓度为292mg/m3的二甲苯降解78%。另外,光照尤其紫外光对纸张的物理性能产生一定的不利影响。

The photocatalytic degradation of xylene with nano titanium dioxide （TiO2） and nano-TiO2/β-cyclodextrin （β-CD） coated papers in the self-made air-tight device and the properties of the base paper and coated papers before and after irradiating were studied. The results showed that both coated papers have activities in photocatalytic degradation of xylene. Paper coated with nano-TiO2/β-CD has a better effect on degradation than the paper only coated with nano-TiO2, and β-CD and nano-TiO2 have significant synergistic effect on the degradation of xylene., Under the radialization of indoor light the degradation of xylene at the concentration of 292 mg/m3 with using nano-TiO2/β-CD coated paper was up to 78% after 2 weeks. However, the irradiation both by the UV light and natural light indoor has negative impact on physical properties of the papers.