Journal
CHEMOSPHERE
Volume 315, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.137711
Keywords
CuO; Catalytic reduction; 4-Nitrophenol; Methyl orange
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CuO loaded g-C3N4 nanocomposites were prepared by a simple calcination method. The formation of CuO nanocrystals on g-C3N4 was confirmed by XRD, FTIR, and XPS analyses. The addition of CuO nanoparticles reduced the band gap and showed high catalytic efficiency in the reduction of 4-NP and MO.
The cupric oxide (CuO) loaded graphitic carbon nitride (g-C3N4) nanocomposites (CuO/g-C3N4) were prepared by a facile calcination method. The formation of monoclinic CuO nanocrystals along with g-C3N4 was confirmed by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopic analysis. X-ray photoelectron spectral (XPS) analysis further confirms the formation of CuO/g-C3N4. Distribution of CuO stone-like crystalline nanoparticles on g-C3N4 nanosheets was observed by transmission electron microscopic images. The influence of CuO loading on the optical property of g-C3N4 was determined by ultraviolet (UV)-visible absorption and photoluminescence (PL) spectral analysis. Band gap was decreased from 2.7 to 2.3 eV by the addition of CuO nanoparticles. The catalytic performance of the synthesized samples in 4-nitrophenol (4-NP) and methyl orange (MO) reduction was evaluated. The 5 wt% CuO/g-C3N4 showed 99.5% (7 min) and 99.7% (4 min) reduction efficiency for 4-NP and MO respectively. The 5 wt% CuO/g-C3N4 could become a potential catalyst in the chemical treatment of organic pollutants.
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