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<p>The g-C<sub>3</sub>N<sub>4</sub>/MXene heterojunction photocatalyst was effectively developed using the wet impregnation synthesis method, and its physicochemical properties were thoroughly characterised. The composites of the g-C<sub>3</sub>N<sub>4</sub>/MXene was prepared by mixing the MXene to varies amount of g-C<sub>3</sub>N<sub>4</sub> (0.1–1.2&#xa0;wt.%). MXene with 0.4&#xa0;wt.% g-C<sub>3</sub>N<sub>4</sub> exhibited the optimal loading on the photocatalytic degradation of methylene blue under visible light, with a degradation efficiency of &gt; 99% within 150&#xa0;min. XRD, FTIR, FESEM, SAP, and DR-UV-Vis were utilised to characterise the g-C<sub>3</sub>N<sub>4</sub>/MXene heterojunction photocatalyst as developed. It was discovered that the introduction of g-C<sub>3</sub>N<sub>4</sub> affects the oxygenated functional groups and increases photocatalytic activity by increasing the density of free carrier electrons and inhibiting electron–hole recombination. However, it was revealed that excessive concentration of g-C<sub>3</sub>N<sub>4</sub> can significantly inhibit photocatalytic activity. The FESEM-EDX analysis revealed Al element was decreased up to 70% for 0.4GM thus increase the intervals between the MXene layers with higher exposed oxygen active sites for photocatalytic degradation. Corresponds to that, 0.4GM has the highest oxygen active sites for g-C<sub>3</sub>N<sub>4</sub>/MXene heterostructure photocatalyst which was 6.1&#xa0;wt.%. The findings of this study may provide an innovative approach for enhancing the photocatalytic activity of MXene for applications requiring highly effective effluent treatment.</p>

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The role of g-C3N4 loadings in MXene for photocatalytic degradation of methylene blue

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Nabilah Saafie,
  • Suriati Sufian,
  • Nandang Mufti,
  • Mohamad Fakhrul Ridhwan Samsudin

摘要

The g-C3N4/MXene heterojunction photocatalyst was effectively developed using the wet impregnation synthesis method, and its physicochemical properties were thoroughly characterised. The composites of the g-C3N4/MXene was prepared by mixing the MXene to varies amount of g-C3N4 (0.1–1.2 wt.%). MXene with 0.4 wt.% g-C3N4 exhibited the optimal loading on the photocatalytic degradation of methylene blue under visible light, with a degradation efficiency of > 99% within 150 min. XRD, FTIR, FESEM, SAP, and DR-UV-Vis were utilised to characterise the g-C3N4/MXene heterojunction photocatalyst as developed. It was discovered that the introduction of g-C3N4 affects the oxygenated functional groups and increases photocatalytic activity by increasing the density of free carrier electrons and inhibiting electron–hole recombination. However, it was revealed that excessive concentration of g-C3N4 can significantly inhibit photocatalytic activity. The FESEM-EDX analysis revealed Al element was decreased up to 70% for 0.4GM thus increase the intervals between the MXene layers with higher exposed oxygen active sites for photocatalytic degradation. Corresponds to that, 0.4GM has the highest oxygen active sites for g-C3N4/MXene heterostructure photocatalyst which was 6.1 wt.%. The findings of this study may provide an innovative approach for enhancing the photocatalytic activity of MXene for applications requiring highly effective effluent treatment.