纳米氧化锌的改性及其光催化性能研究

摘要

以硝酸锌和硬脂酸为主要原料合成了纳米氧化锌(nano-ZnO)，并在后续处理过程中采用正丁醇淬火对氧化锌表面进行改性。通过红外吸收光谱、X射线衍射、紫外-可见漫反射等手段对改性前后样品进行了表征。结果表明，改性纳米氧化锌具有较好的疏水性，可长期悬浮于水的表面，有利于直接用于太阳光催化降解污水。将甲基橙溶液作为模拟废水，考察纳米ZnO在紫外灯和太阳光下的光催化活性。结果表明，改性纳米ZnO比未改性纳米氧化锌具有更好的光催化降解活性。%Nano-ZnO was prepared using Zn(NO3)2•6H2O and stearic acid as the precursors, and was treated by butyl alcohol quenching. Both the modified and unmodified nano-ZnO samples were characterized by XRD and UV-vis. The experimental results indicated that the modified compound was hydrophobic and could suspend on the surface of water for a long time, which has a potential to be applied in wastewater disposal. The photo-catalytical performance of nano-ZnO was evaluated us-ing methyl orange solution under UV light and sunlight. The result showed that the modified nano-ZnO exhibited a much better photo-catalytic activity, compared to the unmodified nano-ZnO under the same conditions.