Solid-Solution-Like o-C3N4/Ag2SO4 Nanocomposite as a Direct Z-Scheme Photocatalytic System for Photosynthesis of Active Oxygen Species
| Autor: | Shujuan Jiang, Shaoqing Song, Jinghua Li, Chuanbao Xiong, Zhanggao Le, Xi Wu |
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| Rok vydání: | 2018 |
| Předmět: |
Nanocomposite
Renewable Energy Sustainability and the Environment General Chemical Engineering 02 engineering and technology General Chemistry Electronic structure Electron 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Redox Spectral line 0104 chemical sciences law.invention law Photocatalysis Environmental Chemistry 0210 nano-technology Electron paramagnetic resonance Solid solution |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 6:10905-10913 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.8b02241 |
| Popis: | Efficient photosynthesis of active oxygen species (e.g., •OH, •O2–, and H2O2) is of cardinal significance for environmental science and biochemistry. We report a system of o-C3N4/Ag2SO4 with solid-solution-like structure synthesized by coordinating the 5s orbit of Ag+ with surface 2p lone electrons of o-C3N4. The as-synthesized o-C3N4/Ag2SO4 demonstrates a unique electronic structure, as illuminated high light absorption, perfect redox potentials, large BET specific area, abundant active sites, and efficient interfacial charge transfer. Electron paramagnetic resonance spectra and Mott–Schottky measurements confirm that o-C3N4/Ag2SO4 photocatalysts demonstrate highly efficient activity for yielding •OH, •O2–, and H2O2 species with the Z-scheme photocatalytic principle. Experimental and DFT calculation reveal that the transferred electrons on the conduction band (CB) made up of Ag 5s were favorably shifted into the valence band (VB) composed of N 2p with the formed coordination under irradiation, greatly pr... |
| Databáze: | OpenAIRE |
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