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• W2894587792 abstract "Graphitic carbon nitride with nitrogen defects (g-C3N4-x) is prepared by a facile and effective solid-state chemical reduction technique at mild temperature conditions. The cyano groups and nitrogen vacancies, as evidenced by electron paramagnetic resonance (EPR), X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectra (FTIR) and Solid-state 13C MAS NMR spectra, are controllable via adjusting chemical reduction temperature. Comparing to the pristine g-C3N4, the as-prepared g-C3N4-x shows much enhanced photocatalytic H2 evolution activity under visible-light irradiation. The maximum H2 evolution rate of 3068 μmol·g-1·h-1 is achieved with g-C3N4-x after chemical reduction treatment at 400 °C for 1 h, which is 4.85 times that of the pristine g-C3N4. Moreover, excellent reusability and storage stability have been shown by this photocatalyst as well. It is discovered that nitrogen defects can result in both the up-shift of the valance band and the down-shift of the conduction band, which benefit the absorption of longer wavelength photons and trapping of the photoinduced electrons, therefore reducing the recombination losses of the generated carriers. It is because of this improved visible-light absorption and charge carrier separation, g-C3N4-x displays better visible-light photocatalytic activity compared to the pristine g-C3N4. It is then concluded that the synthetic strategy presented here represents a straightforward and efficient way to synergistically optimize the chemical composition, optical response, and photocatalytic characteristics of g-C3N4-based photocatalysts." @default.
• W2894587792 created "2018-10-12" @default.
• W2894587792 creator A5042543988 @default.
• W2894587792 creator A5051215249 @default.
• W2894587792 creator A5054926656 @default.
• W2894587792 date "2019-02-01" @default.
• W2894587792 modified "2023-10-17" @default.
• W2894587792 title "A solid-state chemical reduction approach to synthesize graphitic carbon nitride with tunable nitrogen defects for efficient visible-light photocatalytic hydrogen evolution" @default.
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• W2894587792 doi "https://doi.org/10.1016/j.jcis.2018.10.012" @default.
• W2894587792 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30316120" @default.
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