花状ZnO/ZnS异质结构的简易合成、结构表征及光催化活性

采用简便的两步溶液相化学方法,在较低温度下(80℃),制备出了花状的ZnO/ZnS异质结构。分别利用X射线衍射、X射线光电子能谱仪、扫描电子显微镜、透射电子显微镜、紫外-可见光谱仪等测试手段对所制备的样品进行表征,结果表明ZnO/ZnS异质结构是由花状ZnO纳米结构和ZnS纳米粒子组成。在光降解罗丹明B(RhB)的测试中,ZnO/ZnS异质结构样品体现出了比ZnO前驱物和商业P25光催化剂更高的光催化效率,这主要可归因于异质结构更有利于电子-空穴的有效分离。ZnO/ZnS光催化剂体现出良好的循环稳定性。

Flower-Like ZnO/ZnS Heterostructures: Facile Synthesis, Structural Characterization and Photocatalytic Activity

ZnO/ZnS heterostructures with flower-like morphology have been prepared via a simple two-step chemical solution method at low temperature(80 ℃).The as-prepared samples were characterized by X-ray diffraction,X-ray photoelectron spectroscopy,scanning electron microscopy,transmission electron microscopy and UV-Vis spectroscopy.The results demonstrate that the ZnO/ZnS heterostructure is composed of ZnO microflower coated by ZnS nanoparticles.In the test for photodegradation of Rhodamine B(RhB),the ZnO/ZnS sample shows higher photocatalytic efficiency than those of ZnO precursor and commercial photocatalyst of P25,which is mainly attributed to the effective electron-hole separation at the interfaces of the heterostructures.The ZnO/ZnS photocatalyst also retains good cycling stability during the photocatalytic degradation of RhB.