期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 301, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120765
关键词
0D/2D hybrids; Adsorption-activation trade-off; Multiple synergies; Photo-Fenton; Wastewater treatment
资金
- Natural Science Foundation of China [21671127]
- Guangdong Natural Science Foundation [2019A1515012156, 2019A1515010076]
- Major Project of Guang-dong Department of Education [2017KZDXM034]
- Scientific Research Foundation of Shantou University [NTF20005]
- Characteristic Innovation Project of Colleges and Universities in Guangdong [2021KTSCX030, 2021LSYS009, 2021KCXTD032]
- 2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant [2020LKSFG01A]
This study successfully prepared 0D Cu-Fe bimetal oxide quantum dots/2D CNNSs with multi-active sites, showing superior performance in photo-Fenton catalysis, providing new insights for environmental and energy applications.
Exploitation of catalysts with multi-active sites is very important for enhancing catalytic performance. 0D/2D hybrids, especially quantum dots (QDs)/nanosheets (NSs), have attracted increasing attentions for advanced oxidation processes due to high charge mobility and more active sites. However, 0D/2D hybrids with multi-active sites still remain a great challenge. Herein, 0D Cu-Fe bi-metal oxide QDs/2D g-C3N4 (CNNSs) exhibiting superior advantages beyond single-metal 0D/2D counterparts was fabricated via a facile one-step synthesis strategy for photo-Fenton catalysis. The synergy of ultrafine Cu-Fe sites on CNNSs led to outstanding tetracycline removal efficiency over a wide pH range. Our experiments and DFT calculations clearly demonstrated that except for the fast charge separation and transfer, this synergy could achieve the optimal H2O2 adsorption-activation trade-off on Cu-Fe sites, while also modify tetracycline absorption, leading to multiple synergies of adsorption-catalytic degradation and photocatalysis-Fenton oxidation. This work provides new insights in developing multi-functional 0D/2D hybrids for environment and energy applications.
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