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Fabrication of nitrogen-deficient g-C3N4 nanosheets via an acetaldehyde-assisted hydrothermal route and their high photocatalytic performance for H2O2 production and Cr(VI) reduction.
- Source :
- New Journal of Chemistry; 7/21/2023, Vol. 47 Issue 27, p12595-12607, 13p
- Publication Year :
- 2023
-
Abstract
- A highly nitrogen-deficient g-C<subscript>3</subscript>N<subscript>4</subscript> (AH-CN) nanosheet material was successfully prepared via an acetaldehyde-assisted hydrothermal route. The as-prepared AH-CN material was analyzed by X-ray powder diffraction (XRD), N<subscript>2</subscript> physical adsorption–desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), Fourier transform infrared (FT-IR) spectroscopy, UV–vis diffuse reflectance spectroscopy (UV-Vis DRS), elemental analysis (EA), electron paramagnetic resonance (EPR) and photoelectric tests. Compared with H-CN (g-C<subscript>3</subscript>N<subscript>4</subscript> treated hydrothermally without acetaldehyde), a large number of nitrogen vacancies were produced over AH-CN (g-C<subscript>3</subscript>N<subscript>4</subscript> treated under acetaldehyde-assisted hydrothermal conditions). The bandgap of AH-CN decreases and its light absorption was largely improved in UV and visible light regions. Moreover, the as-prepared material possesses a low recombination rate of photogenerated carriers and a relatively negative conduction band potential over AH-CN, which contributes to its strong photocatalytic reduction ability. Under simulated sunlight illumination, the photocatalytic performance for H<subscript>2</subscript>O<subscript>2</subscript> production and Cr(VI) reduction of the AH-CN material was evaluated. The highest H<subscript>2</subscript>O<subscript>2</subscript> yield of 670 μM was obtained over 50AH-CN, which was 2.6 times that of g-CN. In the removal of Cr(VI) via reduction, the removal rate of Cr(VI) over 50AH-CN reaches 56% which is about 5.6 times that of g-CN. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 47
- Issue :
- 27
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 164797675
- Full Text :
- https://doi.org/10.1039/d3nj01963b