期刊
JOURNAL OF MEMBRANE SCIENCE
卷 685, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2023.121924
关键词
Kaolinite; Peroxymonosulfate; Photocatalysis; Principal component analysis
In this study, three catalytic membranes composed of 2D/2D hybrid g-C3N4/kaolinite with different iron species were prepared. The evaluation results showed that the γ-FeOOH nanosheets-modified sample had a higher water flux, while the Fe single atom-modified sample achieved improved bisphenol A removal efficiency. The Fe2O3 quantum dots-modified sample exhibited the highest rate constant. Overall, this study provided a systematic and quantitative assessment of 2D/2D hybrid g-C3N4/layered clay-based catalytic membranes for wastewater treatment.
The catalytic membrane, which combines the physical barrier and peroxymonosulfate (PMS)/visible light (Vis)induced catalytic oxidation functionalities while minimizing biofouling, exhibits great promise as a material for the removal of persistent organic pollutants from wastewater. In this study, three catalytic membranes composed of 2D/2D hybrid g-C3N4/kaolinite with nitrogen vacancies and modified with different iron species (& gamma;-FeOOH nanosheets, Fe2O3 quantum dots, and Fe single atoms) were prepared via vacuum filtration. Evaluation of the catalytic performance demonstrated that & gamma;-FeOOH nanosheets-modified sample exhibited a relatively higher water flux (258.13 L m-2 h-1). In contrast, Fe single atom-modified sample achieved improved bisphenol A removal efficiency (97.39%) under the PMS/Vis synergetic system. Interestingly, the Fe2O3 quantum dotsmodified sample exhibited the highest rate constant based on the retention time. Furthermore, the Fe single atom-modified sample showed consistent removal of bisphenol A, reaching nearly 100% during continuous-flow operation for 180 min, while maintaining a flux of approximately 200 L m-2 h-1. Quenching experiments suggested that & BULL;O2 , 1O2, and h+ were the most important oxidizing species involved in the reaction of the three membranes. Statistical analysis indicated that variations in the average pore size of the membranes were key factors influencing the catalytic activity. Overall, this study offers an in-depth insight into the systematic and quantitative assessment of 2D/2D hybrid g-C3N4/layered clay-based catalytic membranes for wastewater treatment.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据