Enhanced photocatalytic activity of graphitic carbon nitride/cadmium sulfide heterojunctions by protonating treatment
| Autor: | Boyong Ye, Mengdie Yan, Yushuang Ma, Xiaoping Dong, Huanhuan Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Diffuse reflectance infrared fourier transform Graphitic carbon nitride Heterojunction 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Cadmium sulfide 0104 chemical sciences chemistry.chemical_compound chemistry Photocatalysis Methyl orange General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology Photodegradation |
| Zdroj: | Journal of Physics and Chemistry of Solids. 116:50-57 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2018.01.017 |
| Popis: | Highly efficient visible-light-driven protonated g-C3N4 (pg-C3N4)/CdS heterojunctions with different weight ratios of CdS were prepared by treating g-C3N4 with hydrochloric acid and using an in-situ precipitation method. The structure and morphology of heterojunctions were investigated by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV–vis diffuse reflectance spectroscopy (DRS), Fourier transform infrared spectroscopy (FTIR) and nitrogen adsorption technology. The as-prepared pg-C3N4/CdS heterojunction with 50 wt% of g-C3N4 exhibited much higher photocatalytic activity for photodegradation of methyl orange (MO) than pg-C3N4, CdS and g-C3N4/CdS without protonation as well, which could be contributed to the activation of hydrochloric acid treatment and the improved electron–hole separation due to their overlapping band structure of CdS and pg-C3N4. A possible photocatalytic mechanism of the pg-C3N4/CdS heterojunctions with superoxide radical species as the main active species in photocatalysis was proposed on the basis of experimental results. |
| Databáze: | OpenAIRE |
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