表面活性剂辅助法制备纳米ZnO及光催化性能研究

Preparation of Nano ZnO by Surfactant-assisted Method and Its Photocatalytic Property

以Zn(NO_3)_2·6H_2O、氨水和不同的表面活性剂为原料,采用沉淀法制备了具有不同微观形貌和尺寸的纳米ZnO,研究表面活性剂对纳米ZnO光催化降解甲基橙性能的影响。通过X射线衍射仪(XRD)、扫描电镜(SEM)和紫外可见分光光度计(UV-Vis)等对所制备纳米ZnO的物相、形貌及光吸收性能进行表征,并对其进行光催化性能测试。结果表明,以CTAB为表面活性剂所制备的纳米ZnO,粒径均匀、分散性良好、无明显团聚现象,并且对甲基橙的光催化降解性能最好,在2 h内降解率可达90.6%。

Nano ZnO with different morphologies and sizes were synthesized by precipitation method with Zn（ NOB ）2 ·6H20, ammonia water and different surfactants as raw materials. The effect of surfactants on the photocatalytic degradation of methyl orange by nano ZnO was studied. The crystalline phase, morphology, and optical absorption properties of the as-prepared nano ZnO were characterized by X-ray diffraction （XRD）, scanning electron microscope （SEM）, and UV-Vis spectroscopy etc. The photocatalytic capability of nano ZnO was tested using methyl orange being a degradation material. Results show that nano ZnO prepared by CTAB has uniformed paticle size, good dispersibility and less agglomeration, and exhibited the best photocatalytic degradation property that the degradation percentages is up to 90.6% within 2 h.