【摘要】 采用改进的电化学法制备了ZnO-SnO2纳米复合氧化物粉体,通过XRD、FT-IR、TEM等测试手段,对产物的物相组成、粒径大小、形貌等进行了表征;并考察了该纳米复合粉体的光催化活性。结果表明,得到的产物(氧化锌与氧化锡的复合物)颗粒分布均匀、平均粒径约为30～50nm;该复合氧化物对甲基橙及亚甲基蓝溶液的光催化降解明显优于单纯的ZnO或SnO2;前驱体的焙烧温度以及ZnO和SnO2的复合摩尔比对ZnO-SnO2的光催化活性有较大的影响。更多还原

【Abstract】 The composite ZnO-SnO2 nanocrystals were synthesized by the modified electrochemical method.The structure and morphology of the prepared ZnO-SnO2 nanocrystals were characterized by means of XRD,FT-IR and TEM.The photocatalytic activities of ZnO-SnO2 were also studied.The results showed that the composite ZnO-SnO2 powders were composed of particles with average diameter about 30~50 nm.Compared with pure ZnO or SnO2,the composite had better photocatalytic activity for the degradation of methyl orange and methylene blue.The photocatalytic activity of ZnO-SnO2 nanocrystals was greatly dependent on their molar ratio and the calcination temperature for their precursors.更多还原