Y³⁺掺杂ZrO₂/Eu³⁺的合成及光催化性能研究

Synthesis and Photocatalytic Properties of Y³⁺ Doping ZrO₂/Eu³⁺

摘要: 采用溶胶–凝胶法制备得到了含有不同Y³⁺离子掺杂比例的ZrO₂/Eu³⁺ (ZEO-Yx, x = 0, 2, 4，6, 8, 10)材料。随着Y³⁺离子掺杂比例升高(0%~10%)，ZEO-Yx样品结构由初始的单斜结构，转变为单斜与立方相混合结构，最后转变为立方相结构。紫外光催化测试结果表明，ZEO-Yx对罗丹明B具有明显的光催化降解性能，其中单斜结构的ZEO-Y(0)与立方结构的ZEO-Y(10) (Y³⁺浓度分别为0%、10%)的催化效果最好。添加ZEO-Y(0)和ZEO-Y(10)催化剂的罗丹明B溶液一级动力学反应速率常数k分别为0.0229和0.0153，分别为未加催化剂的罗丹明B溶液的4.77倍和3.19倍。掺杂Y³⁺离子比例以及样品的结构共同影响ZEO-Yx对罗丹明B的催化光降解能力。

Abstract: In this work, ZrO₂ powders doped with variable concentration of Y³⁺ (ZEO-Yx, x = 0, 2, 4, 6, 8, 10) were prepared by sol-gel method. As the concentration of doped Y³⁺ increases, the ZEO-Yx powders undergo a phase transition in a sequence from the initial monoclinic structure to monoclinic and cubic mixed structure (ZEO-Y(2/4/6)) and finally to cubic structure (ZEO-Y(8/10)). The ZEO-Yx powders exhibit obvious photocatalytic degradation ability for rhodamine B solution. ZEO-Y(0) and ZEO-Y(10) have the best catalytic performance. First order kinetic reaction rate constant k of rhodamine B solution added with ZEO-Y(0) and ZEO-Y(10) catalysts are 0.0229 and 0.0153, respectively, which are 4.77 and 3.19 times that of rhodamine B solution without catalyst, respectively. The catalytic degradation ability of ZEO-Yx on rhodamine B solution is affected by the concentration of doped Y³⁺ ion as well as the structure of ZEO-Yx sample.