以聚乙二醇为表面活性剂,在室温下采用简便、高效、环保的均匀沉淀法制得 ZnO 纳米片,并用 XRD、SEM、TEM、UV-Vis 等方法对产物进行了表征.研究表明,ZnO 纳米片平均直径为300 nm,平均厚度约为40 nm,产物形貌规则且分散均匀,结晶性良好.通过对 ZnO 纳米片形成机理和实验条件进行系统探讨,提出了三步反应机理.发现聚乙二醇对产物的形貌和尺寸起着关键作用,反应温度对其也有着重要影响.通过甲基橙光催化实验,发现ZnO 纳米片具有优良的光催化性能,在日光照射2 h下对甲基橙溶液的脱色率可达99．3％.该法简便、绿色、快捷,具有良好的工业化生产前景,并可推广于其它纳米功能材料的制备.
With PEG-1000 as the surface active agent,ZnO nanosheets were prepared using a convenient,effi-cient and environmental friendly method at room temperature.The products were characterized by XRD,SEM, TEM,UV-Vis.The results show that the average diameter of the products is 300 nm,the average thickness is about 40 nm.The products were uniform nanosheets,which have good crystallinity.The mechanism of the for-mation of ZnO nanosheets and the experimental conditions were discussed.It was found that the PEG-1 000 was the key factor effecting the morphology and size of the products.Besides,the temperature had important influ-ence on the products.The photocatalytic experiments shown that the as-prepared ZnO nanosheets had excellent photocatalytic properties.The photocatalytic degradation of methyl orange mediated by the as-prepared ZnO nanosheets under sunlight irradiation reached 9 9 .3%.This method is convenient,green,fast and has a good prospect of industrial production.It can also be used in the preparation of other nanomaterials.
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