Defects and plasma Ag co-modified S-scheme Ag/NVs-CN/Bi2O2-δCO3 heterojunction with multilevel charge transfer channels for boosting full-spectrum-driven degradation of antibiotics
Source abstract
Abstract
The optimization of the photogenerated carriers’ relaxation dynamics process is critical for the improvement of photocatalytic performance. Herein, a ternary heterojunction with multilevel charge transfer channels was constructed by coupling plasma Ag, nitrogen vacancies carbon nitride (NVs-CN) and Bi 2O 2-δCO 3. Ag/NVs-CN/Bi 2O 2-δCO 3 heterojunction showed the S-scheme mechanism, which not only promoted the interfacial charge transfer, but also enhanced the driving force for redox reactions. The defect states induced by nitrogen vacancies and oxygen vacancies provided an additional energy level platforms for hot electrons relaxation of plasma Ag, resulting in the improved separation efficiency and utilization rate of the high-energy hot carriers. Hence, the prepared Ag/NVs-CN/Bi 2-δO 2CO 3 heterojunction exhibited the markedly boosted full-spectrum driven catalytic activity for antibiotics degradation. 80.5% and 83.8% of tetracycline and ciprofloxacin could be mineralized into H 2O and CO 2 by the optimal heterojunction under visible light irradiation, and the corresponding mineralization efficiencies could reach 81.7% and 81.5% under NIR light irradiation. The proposed multichannel charge transfer mechanism provided a new insight into the design and preparation of high-active full-spectrum responsive heterojunction photocatalysts.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electronic and Structural Properties of Oxides · Advanced Photocatalysis Techniques · Semiconductor materials and devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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