硫化锌微米球的合成及其光催化性能

Synthesis and Photocatalytic Properties of Zinc Sulfide Microspheres

以硫代乙酰胺为硫源,采用传统的水热法和改进的均匀沉淀–水热法制备了Zn S微米球。对制备的样品进行了表征;以紫外灯为光源,染料罗丹明B、甲基橙、亚甲基蓝为目标降解物,考察了两种方法制备的Zn S微米球的光催化活性。结果表明:改进的均匀沉淀–水热法条件温和,制备的Zn S微米球形貌规则、尺寸均一。沉淀–水热法制备的样品具有较高的光催化活性,在紫外光照射170 min后对罗丹明B的降解率达到98%;光照130 min后对甲基橙的降解率达到95%;光照110 min后,对亚甲基蓝的降解率达到98%。其光催化性能明显优于传统水热法制备的Zn S微米球。

Zinc sulfide(Zn S) microspheres were synthesized via a conventional hydrothermal method and a modified homogeneous precipitation–hydrothermal method with thioacetamide as a sulfur source, respectively. The prepared Zn S microspheres samples were characterized. The photocatalytic properties of the Zn S microspheres were evaluated via photocatalytic degradation of rhodamine-B, methyl orange and methylene blue under ultraviolet(UV) light. The results show that the Zn S microspheres with the regular shape and uniform size synthesized by the precipitation–hydrothermal method can be obtained under a mild reaction condition. Moreover, the Zn S microspheres sample synthesized by the precipitation–hydrothermal method has a greater photocatalytic activity. The photocatalytic degradation rates of samples for rhodamine B, methyl orange and methylene blue under UV light irradiation for 170, 130 and 110 min are 98%, 95% and 98%, respectively. The photocatalytic performance of Zn S microspheres synthesized by the modified precipitation–hydrothermal method is superior to that of the samples synthesized by the conventional hydrothermal method.