College of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin, 300384, China.
Environ Sci Pollut Res Int. 2024 Apr;31(16):23979-23994. doi: 10.1007/s11356-024-32735-x. Epub 2024 Mar 4.
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 BiOCO, promoting electron transport to improve the efficiency of activated PDS. In the reaction system, SO, ·OH, and O 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.
基于硫酸根自由基的高级氧化工艺 (SR-AOPs) 是一种很有前途的污染物降解方法，高效的过硫酸盐活化催化剂的开发受到了广泛关注。本研究采用共沉淀法成功合成了新型 BiCoFe-LDH（BCF-x），可以有效地活化过氧二硫酸盐 (PDS) 来降解苯胺。与纯 CoFe-LDH 的对比分析表明，反应速率常数显著提高了约 14.66 倍；在 0.5 g/L BCF-1.5 和 0.5 g/L PDS 的条件下，10 mg/L 的苯胺（10 mg/L）在 60 min 内降解率达到 100%，这是由于 BCF-1.5 是 CoFe-LDH 和 BiOCO 的复合物，促进了电子传递，提高了活化 PDS 的效率。在反应体系中，SO 4 ·-、·OH 和 O 2 负责苯胺的降解，其中·OH 是主要的活性物种。此外，本研究提出了一种反应电子转移催化机制，为高效活化 PDS 降解污染物提供了新的见解和良好的应用前景。
