【摘要】 采用甲醛有机诱导在水热条件下制备了形貌新颖的WO3粉体,使用XRD,SEM,TEM,BET等手段进行结构和形貌表征,并利用测色计对所制备的样品进行光致变色性能测试.结果表明,合成的WO3粉体仍为六方相,以甲醛为诱导剂合成的粉体是由WO3纳米立方体簇集成的大小均匀的微球团聚而成,纳米立方体的边长为20～50nm,簇集形成的微球直径为500～800nm,这种特殊的形貌有利于光生质子的产生和传输,从而提高了合成的WO3粉体的光致变色性能.更多还原

【Abstract】 The WO3 powder was prepared by a hydrothermal method using formaldehyde as an organic in- ducer, and characterized by XRD, SEM, TEM and BET. Furthermore, its photochromic properties were studied by a color difference meter. The results indicate that the WO3 is hexagonal and has a particular structure. Under the SEM and TEM observations, it was found that these WO3 microspheres induced by HCOH comprised many WO3 cubes. The edge lengths of the WO3 cube range from 20 to 50 nm, and the av- erage diameter of these microspheres is 500～800 nm. Moreover, the special structure of this induced prod- uct provides a better proton diffusion path, thus resulting in its high photochromic properties.更多还原