Coordination-driven synthesis of perfected π-conjugated graphitic carbon nitride with efficient charge transfer for oxygen activation and gas purification
Autor: | Shujuan Jiang, Shaoqing Song, Zhanggao Le, Zhu Ye'an, Chuanbao Xiong |
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Rok vydání: | 2019 |
Předmět: |
chemistry.chemical_classification
Chemistry Graphitic carbon nitride chemistry.chemical_element Charge (physics) 02 engineering and technology Polymer Conjugated system 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Oxygen 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Yield (chemistry) Vacancy defect Photocatalysis 0210 nano-technology |
Zdroj: | Journal of Colloid and Interface Science. 538:237-247 |
ISSN: | 0021-9797 |
DOI: | 10.1016/j.jcis.2018.11.099 |
Popis: | Efficient yield of reactive-oxygen species (ROS) is greatly important for environmental purification and engineering. In this study, the perfected π-conjugated g-C3N4 (PNa-g-C3N4) photocatalysts were constructed by coordination between 3p orbits of Na and N 2p lone electron at vacancy structure of tri-s-triazine polymer for ROS evolution and elimination of HCHO and NO. The perfected π-conjugated structure enhances the visible-light capturing capability, enriches active sites for O2 activation, and promotes the directional charge transfer from N 2p of C3-N to Na and C. Therefore, the superior activities including the evolution of O2− (35 µmol.L−1h−1), and H2O2 (517 µmol.L−1h−1) have been achieved over PNa-g-C3N4 photocatalyst. As a result, PNa-g-C3N4 photocatalysts demonstrate high performances removal efficiency of NO (53% for 6 min), and HCHO (almost 100% for 55 min) in the elimination process. The results may provide the promising strategy to construct efficient photocatalytic system to yield ROS for environmental purification. |
Databáze: | OpenAIRE |
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