壳聚糖模板水浴晶化法制备高催化活性纳米TiO_2

Chitosan Template Water Bath Preparation of TiO2 Nanoparticles with High Photocatalytic Activity

以壳聚糖Chitosan(β-1,4-聚-葡萄糖胺)为模板剂,用溶胶-凝胶70℃水浴条件下制备纳米TiO2粉体.采用透射电镜(TEM)、X射线粉末衍射(XRD)、傅立叶红外光谱(FT-IR)以及紫外-可见光谱(UV-vis)等手段对产物进行了分析和表征.结果表明:加入壳聚糖后,所得纳米TiO2产物由锐钛矿相构成,粒子分散性较好.光催化实验结果表明,所得产物在日光下对有机染料罗丹明B有较好的催化降解作用.

In the presence of the chitosan template, the TiO2 nanoparticles with high photocatalytic activity were prepared by a sol-gel water bath process. The product was characterized by TEM, XRD, FT-IR and UV-vis spectra. The results show that the TiO2 nanoparticles as-obtained are composed of anatase crystal phase, with a good dispersion . the photocatalytic activity of the TiO2 nanoparticles was studied by photodegradating organic dye Rhodamine B on sun light.