Abstract：
The sulfate radical-based advanced oxidation processes (SR-AOPs) is a promising method for the degradation of pollutants, with the development of highly efficient catalysts for persulfate activation has been widely concerned. The novel BiCoFe-LDH (BCF-x) was synthesized successfully by coprecipitation method, which can activate peroxydisulfate (PDS) efficiently to degrade aniline. Comparative analysis with pure CoFe-LDH revealed a remarkable increase in reaction rate constant by approximately 14.66 times; the degradation rate of aniline (10 mg/L) was 100% in 60 min with the condition of 0.5 g/L BCF-1.5 and 0.5 g/L PDS, due to BCF-1.5 which was characterized as a complex of CoFe-LDH and Bi2O2CO3, promoting electron transport to improve the efficiency of activated PDS. In the reaction system, SO4•-, ·OH, and 1O2 were responsible for the aniline degradation and ·OH was the primary one. Furthermore, this work proposes a reaction electron transfer catalytic mechanism, which provided a new insight and good application prospect for efficient activation of PDS for pollutant degradation.
摘要：
基于硫酸盐自由基的高级氧化工艺（SR-AOPs）是一种有前途的污染物降解方法，随着高效催化剂的发展,用于过硫酸盐活化得到了广泛的关注。通过共沉淀法成功合成了新型BiCoFe-LDH(BCF-x),能有效地激活过二硫酸盐(PDS)降解苯胺。与纯CoFe-LDH的比较分析表明，反应速率常数显着增加了约14.66倍；在0.5g/LBCF-1.5和0.5g/LPDS条件下，苯胺（10mg/L）在60分钟内的降解率为100％，由于BCF-1.5被表征为CoFe-LDH和Bi2O2CO3的复合物，促进电子传输以提高活化PDS的效率。在反应系统中,SO4•-，·OH,和1O2是苯胺降解的原因，·OH是主要的。此外，这项工作提出了一种反应电子转移催化机理，为高效活化PDS降解污染物提供了新的思路和良好的应用前景。
