三维铈掺杂氧化锌的制备及其降解罗丹明B的性质研究

Preparation of Three-Dimensional Cerium Doped Zinc Oxide and Its Degradation of Ohodamine B

介绍了一种性能优异的半导体材料——三维氧化锌,在掺杂了Ce后对大分子污染物光催化降解处理方面表现出良好的性能,以硝酸锌和氢氧化钠为原料,同时加入Ce制备了花状的分级微纳米氧化锌,并对制备的氧化锌材料的微观形貌进行表征和X射线衍射分析,探究该复合氧化锌材料作为光催化剂的催化能力。通过实验数据表明,氧化锌在掺杂了质量分数为1.2%的Ce后参与光催化降解罗丹明B,经过120 min,罗丹明B的降解率达到最大值(98.5%),大于市面上商用氧化锌光催经降解罗丹明B(89.1%)的降解率,高于未掺杂Ce纳米氧化锌光催化降解罗丹明B(81.8%)的降解率,Ce掺杂的纳米氧化锌的催化降解罗丹明B的效果得到显著提高。Ce掺杂的氧化锌与未掺杂的相比,罗丹明B的降解率提高了20%左右,并且在光催化活性循环5次后罗丹明B的降解率依然没有明显衰减,说明添加元素Ce的氧化锌仍具有较高的稳定性,可以重复高效使用。

The article introduces a high-performance semiconductor material,three-dimensional zinc oxide,which exhibits excellent performance in photocatalytic degradation of macromolecular pollutants after doping with Ce.Flower shaped graded micro nano zinc oxide was prepared using zinc nitrate and sodium hydroxide as raw materials,while Ce was added.The microstructure of the prepared zinc oxide material was characterized and X-ray diffraction analysis was performed,Explore the catalytic ability of the composite zinc oxide material as a photocatalyst..The results showed that zinc oxide participates in the photocatalytic degradation of rhodamine B after doping with 1.2%of Ce,and the degradation rate reaches a maximum of 98.5%after 120 min,which is greater than the 89.1%degradation rate of commercial zinc oxide,and higher than the 81.8%degradation rate of undoped Ce nano zinc oxide photocatalytic degradation of rhodamine B.It can be seen that the catalytic degradation effect of nano-zinc oxide doped with Ce has been significantly improved.Compared to the undoped zinc oxide,the degradation rate of Ce doped zinc oxide is increased by about 20%,and the degradation rate data is still not significantly attenuated after 5 cycles of photocatalytic activity,which indicated that zinc oxide doped with Ce still has high stability and can be used repeatedly and efficiently.