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<p>Recently, researchers have focused on eco-friendly methods for synthesizing gases and chemicals. In photocatalytic N<sub>2</sub> fixation, transition-metal sites adsorb N<sub>2</sub> and weaken its triple bond. Due to the presence of iron in the nitrogenase enzyme, iron-containing catalysts are of interest in nitrogen fixation. PCN-222 (Fe) is among the compounds that have worked well in nitrogen fixation. We report the solvothermal synthesis and testing of the PCN-222 (Fe)/g-C<sub>3</sub>N<sub>4</sub> composite in different percentages (10, 20, 30, and 40%) and studied the nitrogen reduction process under visible-light conditions. The PCN-222 (Fe)/g-C<sub>3</sub>N<sub>4</sub> composite, we synthesized by a solvothermal method. The highest photocatalytic N2 fixation rate (595.23 μmol g<sup>−1</sup> h<sup>−1</sup>) was observed for the 30% PCN-222 (Fe)/g-C<sub>3</sub>N<sub>4</sub> composite, which is almost 2.7 times higher than that of PCN-222 (Fe) alone. To characterize and investigate the synthesized composites, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectra, Ultraviolet–visible (UV–Vis) spectroscopy, Ion chromatography (IC), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) were used to study the properties of the synthesized composites.</p> Graphical abstract <p></p>

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Boosting and convenient production of NH3 by using PCN-222 (Fe)/g-C3N4 composite through N2 fixation process under visible light

  • 期刊论文

  • 发表日期：

    2025年8月10日

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  • Parva Bayat-Makou,
  • Saeed Dehghanpour,
  • Bahareh Bagherpour

摘要

Recently, researchers have focused on eco-friendly methods for synthesizing gases and chemicals. In photocatalytic N2 fixation, transition-metal sites adsorb N2 and weaken its triple bond. Due to the presence of iron in the nitrogenase enzyme, iron-containing catalysts are of interest in nitrogen fixation. PCN-222 (Fe) is among the compounds that have worked well in nitrogen fixation. We report the solvothermal synthesis and testing of the PCN-222 (Fe)/g-C3N4 composite in different percentages (10, 20, 30, and 40%) and studied the nitrogen reduction process under visible-light conditions. The PCN-222 (Fe)/g-C3N4 composite, we synthesized by a solvothermal method. The highest photocatalytic N2 fixation rate (595.23 μmol g−1 h−1) was observed for the 30% PCN-222 (Fe)/g-C3N4 composite, which is almost 2.7 times higher than that of PCN-222 (Fe) alone. To characterize and investigate the synthesized composites, X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) spectra, Ultraviolet–visible (UV–Vis) spectroscopy, Ion chromatography (IC), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) were used to study the properties of the synthesized composites.

Graphical abstract