泡沫镍/硅烷膜/ZnO复合材料的制备及其光催化性能

Preparation of foam nickel/silane film/ZnO composites and their photocatalytic performance

采用水热法制备氧化锌(ZnO)微球,并以水基硅烷膜为黏结层、以泡沫镍为基底负载ZnO微球,得到泡沫镍/硅烷膜/ZnO复合材料。采用扫描电子显微镜(SEM)对泡沫镍/硅烷膜/ZnO复合材料的表面微观形貌进行观察。同时研究经多次负载ZnO微球的复合材料和负载纳米二氧化钛(TiO2)的复合材料对甲基橙的光催化降解效果。研究结果表明:ZnO微球的粒径约为5μm,表面由厚度约为10 nm的多孔鳞片组成,水基硅烷膜厚度约为1μm,与泡沫镍基体结合紧密,负载的ZnO微球部分嵌入硅烷膜。经一次负载ZnO微球的复合材料降解性能最佳,负载ZnO微球的复合材料对甲基橙的降解效果优于负载纳米TiO2的复合材料。

Uniform ZnO microspheres were successfully synthesized by a hydrothermal route. Foam nickel/silane film/ZnO composites were prepared by loading ZnO microspheres on the foam nickel with water base silane film as the binder. The morphology of composites was investigated by scanning electron microscopy （SEM）. The photocatalytic performances of composites loaded with ZnO for different cycles and those loaded with TiO2 in the photodegradation of methyl orange are investigated. The results reveal that ZnO microspheres with diameters of 5 tim are assembled by many porous nanosheets which are about 10 nm in thickness. Silane films which have thickness of about 1 μm are well adhered to the nickel foam, and some ZnO microspheres are embedded in silane films. Composites loaded ZnO for 1 cycle show the best photocatalytic performance and composites loaded with ZnO show better photocatalytic performance than those loaded with TiO2.