水热法合成微米级棒状SnO_2

Hydrothermal Synthesis of SnO_2 Microrods

本文采用水热法，以SnCi4·5H2O和ZnO为前驱物，6mol／LKOH作矿化剂，低温180℃反应12h，高温430℃反应24h，合成了微米级棒状SnO2。测量了合成材料的X射线衍射谱（XRD），利用透射电镜（TEM）和扫描电镜（SEM）对晶体的形貌进行了表征。实验结果表明，在低温180℃时首先合成了ZnSnO3，提高温度到430℃，利用ZnSnO3高温分解的特性提供了SnO2晶体生长的溶质条件，使SnO2晶体持续生长，合成了微米级SnO2，晶体直径可达0．3～0．5μm，长度约为3～10μm。通过在酸性溶液中浸泡生成物，可以获得纯SnO2晶体。

In this paper, SnO2 micronrods were synthesized by hydrothermal method, with SnCl4·5H2O and ZnO as precursor, 6mol/L KOH as mineralizer. The reaction time was 12h at 180℃ and 24h at 430℃. The crystals were determined by XRD and the morphology of crystals was studied through TEM and SEM. The result showed that ZnSnO3 was obtained firstly at 180℃, then, the temperature was raised to 430℃. Because of the resolvability of ZnSnO3 in high temperature, the solute condition was provided which made SnO2 continuously grow and finally SnO2 microncrystals were synthesized. The diameters of the crystals were 0.3-0.5μm, the length was 3-10μm. The pure SnO2 crystals were obtained by dipping the resultant into acidic solution.