SnO/Sn_3O_4异质结构的制备及其光催化性能

Synthesis and photocatalytic performance of heterostructured SnO/Sn_3O_4

采用简单的一步水热法合成了SnO/Sn_3O_4异质结构花状微球。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)、表面积分析仪和紫外-可见吸收光谱(UV-Vis)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。结果表明,花状微球由大量SnO/Sn_3O_4异质结构组成,比表面积为52.6 m2/g;样品中SnO和Sn_3O_4的禁带宽度分别为2.90和2.51eV,同时对罗丹明B有较好的光催化降解特性。

Flower-like microspheres were synthesized by a simple one-step hydrothermal method. The crystal structure, morphology, composition, specific surface area and optical property of the samples were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, high resolution transmission electron microscopy （HRTEM）, automatic surface area analyzer and UVVis absorption spectrum. Photocatalytic activity was evaluated by degradation of rhodamine B（RhB） solution. The results showed that the flower-like microspheres were composed of SnO/Sn3O4 heterostructures. The specific surface area of the sample was 52.6 m2/g. The band gap of SnO and Sn3O4 in the samples were evaluated as 2.90 and 2.51 eV, respectively. Finally, SnO/Sn3O4 heterostructures semiconductors performed the efficiency degradation of RhB.