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采用水溶液法,在低温下通过控制羧基化合物的种类(草酸、酒石酸、柠檬酸)和加入量合成了单分散性WO_3·H_2O纳米片,并采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、紫外-可见光谱仪(UV-vis)对样品的结构和形貌进行表征.结果发现羧基对单分散性WO_3·H_2O纳米片的形成具有重要作用,在此基础上讨论了它的作用机理.此外,实验还考查了添加草酸、酒石酸、柠檬酸对合成样品的光致变色性的影响,结果发现样品的光致变色性依次增强,并结合SEM、XRD、UV-vis进行了分析研究.
The monodispersed WO_3 · H_2O nanosheets were synthesized by aqueous solution method under the control of the kinds of the carboxyl compounds (oxalic acid, tartaric acid, citric acid) and the addition amount. The morphology of the nanoparticles was characterized by scanning electron microscopy (SEM), X-ray diffractometer ) And UV-vis spectroscopy were used to characterize the structure and morphology of the sample. The results showed that the carboxyl group played an important role in the formation of monodispersed WO_3 · H_2O nanosheets, and its mechanism of action was discussed. In addition, the effects of adding oxalic acid, tartaric acid and citric acid on the photochromism of the synthesized samples were also investigated. The results showed that the photochromic properties of the samples were enhanced in turn and analyzed by SEM, XRD and UV-vis.