TiO_2/CPF纳米复合催化材料的制备  

Preparation of nanosized catalytic material TiO_2/CPF

作　　者：苏碧桃[1] 张小红[1] 敏世雄[1] 费鹏[1] 孙佳星[1] 雷自强[1] 

机构地区：[1]西北师范大学化学化工学院甘肃省部共建生态环境相关高分子材料教育部重点实验室甘肃省高分子材料重点实验室,甘肃兰州730070

出　　处：《化学试剂》2010年第3期193-196,共4页Chemical Reagents

基　　金：甘肃省自然科学基金资助项目(0710RJZA119)

摘　　要：利用聚合-热转化两步法,以TiCl4作催化剂和Ti源,由糠醇单体聚合制备出了具有共轭结构的高分子(CPF)和TiO2的纳米复合催化材料(TiO2/CPF);用TEM、XRD、FT-IR和UV-Vis等技术对其进行了表征,以亚甲基蓝(MB)为目标污染物研究了该材料在自然光条件下的催化性能。结果表明,由该方法可以得到纳米级TiO2/CPF复合材料,其中TiO2的结构为锐钛矿型,CPF具有大的共轭结构,且与TiO2之间存在强相互作用。CPF与TiO2的复合将TiO2的光谱响应拓展到了整个紫外-可见区,极大地改善了TiO2在自然光条件下的催化性能。在自然光条件下,该复合材料,能够在5 min将MB溶液完全脱色,COD去除率达93.9%;重复利用6次对MB溶液的脱色率依然在95%以上,而纯TiO2在紫外光照射3 h时COD去除率仅为54.4%。Nanosized TiO2/CPF complex catalyst was successfully prepared through a two-step method from furancarbinol monomer and TiCl4 used as the catalyst and Ti source and was characterized by TEM,XRD,FT-IR and UV-Vis techniques.Its photocatalytic property was evaluated by using the degradation of methylene blue（MB） dye solution as model reaction under the irradiation of natural light.The results showed that the nanosized TiO2/CPF complex material could be obtained through the said method.The crystalline structure of TiO2 in the complex nanomaterials was anatase.Having a large conjugated structure,CPF was closely linked with TiO2 by a strong interaction.Introducing CPF into TiO2 extended the photo response of TiO2 from UV to visible region and the catalytic property was greatly improved under the natural light.The TiO2/CPF nano-sized material could fully decolorize the dye MB and its COD removal reached 93.9% in 5 min under the irradiation of natural light,while in the case of TiO2 the COD removal rate of the MB solution only reached 54.5% in 3 h under the illumination of a 250 W high-pressure lamp.

关 键 词：TiO2/CPF 纳米复合材料 制备 表征 催化性能 

分 类 号：TQ426.6[化学工程]