FeOOH/MoS_(2)的制备及其活化过一硫酸盐的性能

Synthesis of FeOOH/MoS_(2) and Its Activation Performance for Peroxymonosulfate

通过化学沉淀-水热法制备了FeOOH/MoS_(2)复合催化剂,以苯酚为目标污染物,探究其活化过一硫酸盐(PMS)的性能。SEM和XRD结果表明,FeOOH成功负载于MoS_(2)纳米片上。FeOOH和MoS_(2)掺杂比为1∶3的复合催化剂活化PMS性能最好,在最佳反应条件下,反应20 min后,苯酚降解率为96.60%,且该反应符合准一级动力学模型。自由基捕获实验证实,SO_(4)^(-)是体系中主要的活性氧物种。另外,考察了实际水体和常见的无机阴离子对催化降解反应的影响,苯酚降解率在实际水体中略有下降,无机阴离子对苯酚降解的干扰从大到小依次为HCO_(2)^(-)>H_(2)PO_(4)^(-)>NO_(3)^(-),Cl^(-)的影响可忽略不计。以上研究可为高活性PMS催化剂的设计提供新思路。

FeOOH/MoS_(2)composite catalyst was synthesized by the chemical precipitation-hydrothermal method.The phenol was used as the target pollutant to explore its performance of activating peroxymonosulfate(PMS).FeOOH was successfully loaded on MoS_(2)nanosheets.The composite catalyst with a ratio of 1∶3 had the best activation performance for PMS.Under optimal reaction conditions,phenol degradation rate reached 96.60%after 20 minutes.And this reaction was in accordance with the pseudo first-order kinetic model.Free radical capture experiments confirms that SO_(4)^(-)was the major reactive oxygen species in FeOOH/MoS_(2)/PMS system.In addition,the effect of actual water and common inorganic anions on the catalytic degradation reaction was investigated.The degradation rate of phenol was reduced in actual water.The interference of inorganic anions on phenol degradation was in the order of HCO_(2)^(-)>H_(2)PO_(4)^(-)>NO_(3)^(-),and the influence of Cl^(-)was negligible.The above research can provide new ideas for the design of high-activity PMS catalysts.