溴离子掺杂钨酸钡催化超声降解罗丹明B研究

Ultrasonic Degradation of Rhodamine B Catalyzed by Bromine-Doped Barium Tung-state

摘要: 本文通过水热合成法制备了溴离子(Br−)掺杂的钨酸钡(BaWO₄)催化剂材料，并对其进行了多方面表征。研究了不同实验参数对该催化剂超声催化降解罗丹明B (Rhodamine B, Rh B)的影响，并确定了各项实验参数的最优值。得到优化后的实验参数为Br−/BaWO₄中Br−掺杂比为5%、5% Br−/BaWO₄加入量为1.0 g∙L⁻¹，超声功率200 W，超声时间2 h，Rh B初始浓度5 mg∙L⁻¹，初始溶液pH = 7时，此时对Rh B的降解率高达98.3%，并通过循环实验分析了该催化剂的可实际应用性。

Abstract: In this study, bromine-doped barium tungstate (BaWO₄) was prepared by hydrothermal synthesis and characterized in various aspects. The effects of different experimental parameters on the sonocatalytic degradation of rhodamine B (Rh B) were evaluated by UV-v is spectra, and then determined the optimal values of each experimental parameter in the process of degradation. The degradation rate of Rh B by Br−/BaWO₄ was 98.3% under the optimized experimental parameters with the ratio of bromine-doping was 5%, the addition amount of 5% Br−/BaWO₄ was 1.0 g•L⁻¹, the ultrasonic power was 200 W, the ultrasonic time was 2 h, the initial concentration of Rh B solution was 10 mg•L⁻¹, and the initial pH of solution was 7. The practical applicability of the sonocatalyst was carried out by the cyclic experiments.