Silver cyanamide nanoparticles decorated ultrathin graphitic carbon nitride nanosheets for enhanced visible-light-driven photocatalysis
| Autor: | Fuqiang Huang, Bingquan Jia, Yuan Cheng, Guoheng Yin, Linggang Fan, Wei Zhao |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Nanocomposite
Materials science Graphitic carbon nitride Nanoparticle Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Photocatalysis Cyanamide 0210 nano-technology Carbon nitride Visible spectrum |
| Zdroj: | Catalysis Science & Technology. 8:1447-1453 |
| ISSN: | 2044-4761 2044-4753 |
| DOI: | 10.1039/c7cy02325a |
| Popis: | Metal cyanamide compounds are an emerging class of photoactive materials for solar energy applications. Although silver cyanamide (Ag2NCN) applied in visible-light-driven photocatalysis has been demonstrated, the photocatalytic performance is unsatisfactory. Herein, a composite of Ag2NCN nanoparticles supported on ultrathin carbon nitride (g-C3N4) nanosheets is synthesized by combining thermal annealing and an in situ precipitation method. Due to the band alignment between Ag2NCN and g-C3N4, a type-II semiconductor heterojunction is built up to improve the photocatalytic activity of pristine Ag2NCN. The as-prepared nanocomposites exhibit enhanced photocatalytic activity for organic dye decolorization under visible light irradiation compared with pure Ag2NCN and pristine g-C3N4 nanosheets. The enhancement of photocatalytic performance can be ascribed to the synergistic effects between Ag2NCN and g-C3N4, which include improved light absorption, superior charge separation, uniform dispersion and smaller size of Ag2NCN loaded on high surface area g-C3N4 nanosheets. The kinetics model and degradation mechanism of the nanocomposites are also proposed. |
| Databáze: | OpenAIRE |
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