纤锌矿ZnS在油--水界面处的室温制备及光催化性能

通过控制硫化锌室温成核反应在油-水液-液界面处进行,并采用羟基端基自组装分子层修饰的聚合物膜作为柔性衬底,最终在衬底表面制得硫化锌纳米晶膜. X射线衍射表征显示产物为高温稳定的纤锌矿结构. 扫描电镜和透射电镜观察发现硫化锌膜由粒径30~50 nm的颗粒构成. 产物对甲基橙的光催化降解研究证实在紫外光辅助下硫化锌纳米晶膜对有机物的降解能力. 鉴于上述结果,提出了一种结合油-水液-液界面及自组装分子层功能化的衬底,在室温且无添加剂条件下一步制备高温稳定相ZnS功能膜的方法,并分析了产物形貌与光催化性能间的关系.

Room-temperature synthesis of wurtzite ZnS at the oil--water interface and its photocatalytic performance

Room-temperature synthesis of ZnS was controlled at the oil- water liquid- liquid interface. Combining with polymer films which were modified by hydroxyl-terminated self-assembled monolayers ( SAMs) as flexible substrates, nanocrystalline ZnS films were fabricated on the substrates. X-ray diffraction analysis indicates that the ZnS films have a hexagonal wurtzite structure, which is the high-temperature polymorph of sphalerite. Scanning electron microscopy and transmission electron microscopy observations show that the ZnS films consist of nanoparticles with the diameter of 30-50 nm. Photocatalytic degradation of methyl orange by these prod-ucts under UV-light irradiation was observed, which confirmed the photocatalytic degradation ability of the nanocrystalline ZnS films to organics. In view of the results, a facile one-step method, combining the oil- water interface with the SAMs-modified substrate, was proposed for fabricating the wurtzite ZnS functional films without any additive at room temperature. The relationship between photocata-lytic performance and the morphology of the products was also discussed.