ZnO-PFD纳米复合材料的制备及其光催化性能  

Preparation of ZnO-PFD Nanocomposites and Its Photocatalytic Property

作　　者：马占营[1,2] 姚秉华[1] 何仰清[1] 范广[2] 

机构地区：[1]西安理工大学应用化学系,陕西西安710048 [2]咸阳师范学院化学与化工学院,陕西咸阳712000

出　　处：《精细化工》2009年第9期838-843,866,共7页Fine Chemicals

基　　金：国家自然科学基金(90401009);陕西省自然科学基金(SJ08B16);咸阳师范学院引进人才专项(08XSYK305);陕西省教育厅项目(09JK802)~~

摘　　要：以糠醛和ZnO粉体为原料,用酸催化聚合的方法制备了复合光催化剂前驱体,经适当热处理后得到ZnO-共轭高分子(ZnO-PFD)纳米复合微粒,通过SEM、XRD、FTIR、UV-vis、TG-DTA等技术对其表面形貌及结构进行了表征。结果表明,复合微粒的粒径为50～100nm,其中ZnO呈六方纤锌矿结构,PFD的掺杂拓宽了ZnO的光谱响应范围,使其能吸收紫外-可见区的全程光波。在自然光、室温条件下,以亚甲基蓝(MB)的脱色降解为模型反应,考察了复合微粒的光催化性能,探讨了热处理温度和ZnO含量对复合微粒光催化性能的影响。当热处理温度为400℃,ZnO的质量分数为48.62%时,复合微粒对MB降解反应20min,就可使MB水溶液完全脱色,COD去除率达70.24%,ZnO重复使用3次后,对MB的脱色率仍可达87%。ZnO-PFD nanocomposites were obtained by the calcination of its precursor ZnO-PFD-0, which was prepared via the acid-catalyzed process from furfuraldehyde and ZnO powder. The surface morphology and structure of samples were characterized through SEM, XRD, IR, UV - vis and TG - DTA techniques. The results showed that the particle size was 50 -100 nm,the crystalline structure of ZnO was the hexagonal wurtzite structure. The doping of PFD could extend the photo-response of ZnO to the whole UV - vis region （ A = 190 - 800 nm ）. Photocatalytic experimental results indicated that, under natural light and room temperature conditions, when the precursor was heat - treated at 400 ℃ and ZnO content was about 48.62%, the obtained ZnO-PFD400 nanocomposites exhibited a much higher catalytic activity and could be repeatedly used for 3 times while keeping a high activity on the MB decolorization reaction.

关 键 词：ZNO 共轭高分子 纳米复合微粒 催化性能 功能材料 

分 类 号：O643.36[理学—物理化学] X592[理学—化学]