多级结构氧化锌的构筑、形貌调控及其光催化活性

分别以混合常见二锌盐为锌源,以离子液体和柠檬酸钠为表面活性剂,在绿色温和的条件下采用二次沉积法制备出多级结构氧化锌。用XRD、IR、SEM、UV-Vis、PL等表征了样品的组成、结构、形貌、光致发光性能及光催化性能。探讨了表面活性剂、阴离子、温度等因素对氧化锌形貌的影响。结果表明,由不同表面活性剂所得到样品的多级结构有较大的差异。此外,推测了在多级结构氧化锌形成过程中,阴离子和温度对样品形貌的调控作用,并对比了三种典型样品的光催化性能,其中样品-1的光催化性能最好。

Hierarchical ZnO: Architecture, Morphological Control and Photocatalytic Activity

Under the green and mild conditions, the hierarchical ZnO was fabricated by the secondary deposition with mixed two zinc salts (zinc source), ionic liquid (surfactant). The composition, structure, morphology, photoluminescence properties and photocatalytic activity of samples were characterized by XRD, IR, SEM, UV-Vis and PL, respectively. The influential factors on sample morphology, such as surfactant, the kind of anion and temperature, were discussed. The results indicate that surfactant has a significant regulation on the morphologies of as-prepared ZnO samples. Furthermore, the anion and temperature also play a critical role in the crystal structure and morphology of ZnO. In addition, all of as-prepared hierarchical ZnO show an excellent photocatalytic activity on methyl orange under UV lamp, where the sample-1 is slightly better than others.