花状空心Sn3O4微球的制备及其光催化性能的研究

通过简易的一步水热法在不同制备温度(120℃、135℃、150℃)下成功合成了花状空心Sn₃O₄微球。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HRTEM)、表面积分析仪、紫外可见吸收光谱(UV-Vis)和光致发光谱 (PL)等测试手段对其形貌、结构、比表面积和光学性质进行了分析, 并以罗丹明B(RhB)为模型污染物研究了样品的光催化性能。实验结果显示: 中空微球结构不随水热合成温度发生明显改变; 随着水热合成温度的升高, 样品的UV-Vis吸收峰从384 nm蓝移至365 nm, 同时PL发射峰位的峰强逐渐降低。光催化结果显示, 在120℃合成的空心Sn₃O₄微球具备最优的光催化性能。

Fabrication of Flower-like Sn3O4 Hollow Microspheres and Their Photocatalytic Activity

Flower-like Sn₃O₄ hollow microspheres were synthesized via one-step hydrothermal process with varying reaction temperature (120℃, 135℃ and 150℃). The crystal structure, morphology, composition, specific surface area, and optical property of the obtained products were characterized by X-ray diffraction(XRD), scanning electron microscope(SEM), transmission electron microscope(TEM), high resolution transmission electron microscope(HRTEM), automatic surface area analyzer, UV-Vis absorption spectrum, and photoluminescence spectrum (PL). The photocatalytic experiments of the as-prepared samples were evaluated by decomposing the model pollutants rhodamine B (RhB). Systematical measurements revealed that the morphology of the hollow microsphere structures was faithfully preserved as changing the hydrothermal synthesized temperature. With the increase of the hydrothermal synthesized temperature, the UV-Vis absorption peak of samples shifted from 384 nm to 365 nm and the PL intensity further weakened. Finally, the photocatalytic activity presented that Sn₃O₄ microspheres hydrothermal synthesized at 120℃ had the best photcatalytic performance.