期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 300, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119807
关键词
Photocatalytic; Heavy metal reduction; Heterostructures; Molecule tailoring; Electronic channel
资金
- Natural Science Foundation of Jiangsu Province [SBK2020043594]
- National Science Funds for Creative Research Groups of China [51421006]
- Major Science and Technology Program for Water Pollution Control and Treatment [2017ZX07204003]
- Key Program of National Natural Science Foundation of China [91647206]
- Fundamental Research Funds for the Central Universities [B200204033]
- PAPD
- Blue Project in Jiangsu Province
Utilizing an atomic-hybridized strategy to construct an electronic channel significantly accelerates the hexavalent chromium reduction reaction over ReS2 nanosheets with carbon quantum dots. This simple and feasible method enhances the reaction rate and provides new insights for designing efficient photocatalysts.
The design of the excellent photocatalyst with high catalytic activity and light response characteristics remains a significant challenge for heavy metal reduction. Different from conventional heterostructures, this work focuses on a simple and feasible atomic-hybridized strategy to accelerate reaction kinetic process through constructing an electronic channel. Herein, we present an interesting molecule tailoring method to open C = O double bonds of carbon quantum dots (CQDs) and then anchor it onto ReS2 nanosheets to form an electronic channel via Re-5d and O-2p orbital hybridization, in which photoinduced carrier of surface-reduced CQDs (rCQDs) can freely transfer to ReS2 for hexavalent chromium reduction. Compared to pristine ReS2 nanosheets and CQDs/ReS2, the reduction reaction rate constant over the pseudo-first-order kinetic model is enhanced about 13.1 and 4.3 times, respectively. Our findings provide new inspirations for steering electronic channel by atomic hybridization and accelerating reaction kinetic mechanism simultaneously.
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