离子液体中片状纳米ZnO的制备、表征及其光催化性能

Characterization of ZnO nano-flakes synthesized in synthesized ionic solvent

采用一步合成法制备了离子液体1-庚基-3-甲基咪唑溴盐([C7mim]Br),以该离子液体为反应介质,在常压下制备了片状纳米ZnO粉体。用场发射扫描电子显微镜、X射线衍射、傅立叶转换红外光谱等对片状纳米ZnO粉体进行表征,结果表明,在该体系下离子液体作为溶剂及模板剂制备出具有六方纤锌矿结构片状聚集体,平均厚度约为20 nm,平均长和宽约为190 nm。以高压汞灯为光源,以ZnO纳米片为光催化剂,对有机染料罗丹明B进行光降解实验,结果表明,经过145 min后罗丹明B的去除率达到了96.4%,具有良好的光催化活性。

ZnO nano-flakes were prepared in the ionic solvent of the synthesized 1-heptal-3-methylimidazolium bromide and characterized by SEM.XRD and FT-IR. The results showed that the structure of ZnO flakes was hexagonal wurtzite, with average thickness of 20 nm and average length or width of 190 nm. The prepared ZnO nano-flakes were applied on photocatalytic degradation of Rhodamine B, and the degradation rate was 96.4% after being irradiated for 145 min.