期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 273, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119051
关键词
BPQDs; Tubular g-C3N4; Cr(VI) reduction; Oxytetracycline hydrochloride; Density functional theory
资金
- Program for the National Natural Science Foundation of China [51521006, 51879101, 51809090, 51579098, 51779090, 51709101, 51709100, 51278176, 51378190, 51408206]
- National Program for Support of Top-Notch Young Professionals of China (2014)
- Fundamental Research Funds for the Central Universities
- Hunan Provincial Science and Technology Plan Project [2016RS3026, 2017SK2243, 2018SK20410]
- Program for New Century Excellent Talents in University [NCET-13-0186]
- Three Gorges Follow-up Research Project [2017HXXY-05]
- Natural Science Foundation of Hunan Province, China [2019JJ50077]
- Fundamental Research Funds for the Central Universities [531109200027, 531118010114, 531107050978]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
As an up-and-coming two-dimensional (2D) material, black phosphorus (BP) has attracted much attention due to its abundant metal-free properties and broad application prospects in photocatalysis. This study introduces a promising sunlight-driven metal-free photocatalyst for oxytetracycline hydrochloride degradation and hexavalent chromium reduction in water and wastewater. The roles of BP quantum dots (BPQDs) in the distribution of electrons and photocatalytic performances were well identified by experimental and density functional theory (DFT) calculations. As expected, the specially designed 0D/1D structure shows unusual photocatalytic efficiency toward the degradation of oxytetracycline hydrochloride (0.0276 min(-1)) and reduction of hexavalent chromium (0.0404 min(-1)). Reactive species, namely, O-center dot(2)- and h(+) comprised the primary photocatalytic mechanisms for oxytetracycline hydrochloride degradation. This work highlights that the combination of tubular g-C3N4 (TCN) with BPQDs facilitates the charge spatial separation in the photocatalytic process, and provides alternative strategy for design of highly active and metal-free nanomaterials toward environmental remediation and sustainable solar-to-chemical energy conversion.
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