摘要：

通过柠檬酸络合法合成硼和铒共掺杂BiVO₄,并对其进行 XRD、UV-Vis的表征以分析合成材料的物相、形貌。同时考察溶液的初始浓度、pH、催化剂投加量以及光照强度等因素在可见光的照射下对罗丹明B光催化降解的影响。实验结果表明:在50 mL罗丹明B水溶液中,初始质量浓度为10 mg/L,pH=3,催化剂投加量为0.015 g,光照距离14 cm,B-Er共掺杂BiVO₄对罗丹明B有较好的光催化活性,反应50 min 后,降解率可达90%以上。

关键词: BiVO₄, 硼和铒共掺杂, 光催化降解, 罗丹明B

Abstract:

Boron and erbium co-doped BiVO₄ visible-light-driven photocatalysts have been synthesized by citric acid complex method. The phase,and morphology of the synthetic material are characterized by XRD and UV-Vis. Meanwhile,the effects of the factors,such as solution initial concentration,pH,dosage of catalyst,and illumination intensity,on the degradation of Rhodamine B under visible light irradiation are investigated. The experimental results show that boron and erbium co-doped BiVO₄ has better photocatalytic activity on Rhodamine B degradation under the following conditions:initial Rhodamine B concentration is 10 mg/L,the volume of solution 50 mL,pH 3 of the hydrothermal reaction, dosage of catalyst 0.015 g and light distance 14 cm. After reacted for 50 min,the degradation rate of Rhodamine B can be more than 90%.

Key words: bismuth vanadate, boron and erbium co-doping, co-doped photocatalystic degradation, Rhodamine B

中图分类号: 

• X703.1