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<p>In this work, Pt-free g-C₃N₄/NiMoO₄ hybrid nanocomposites were successfully synthesized via a simple hydrothermal approach and systematically evaluated for their photovoltaic (PV) and photocatalytic performance. XRD analysis confirmed the crystalline nature of NiMoO₄ and revealed its strong interfacial coupling with g-C₃N₄ nanosheets. SEM and TEM observations showed that NiMoO₄ formed uniform microspherical structures, while the incorporation of g-C₃N₄ generated ultrathin sheet-like hybrids, promoting intimate interfacial contact and facilitating efficient charge transport. XPS spectra further validated the chemical bonding and successful coupling between g-C₃N₄ and NiMoO₄. The optimized g-C₃N₄/NiMoO₄-based dye-sensitized solar cell (DSSC) exhibited an impressive power conversion efficiency (PCE) of 8.9 ± 0.5%, surpassing that of bare NiMoO₄ (6.5 ± 0.2%). The double-layer capacitance (Cdl) values, derived from the linear fitting of current density versus scan rate, were 2.5 mF cm⁻² for NiMoO₄ and 17.2 mF cm⁻² for the composite, confirming superior charge storage and transfer capability in the hybrid. Moreover, the g-C₃N₄/NiMoO₄ nanocomposite demonstrated excellent photocatalytic degradation efficiency toward Rhodamine B (RhB), achieving 88% degradation with a rate constant of 33.8 × 10⁻³ min⁻¹. The material maintained high catalytic activity after multiple cycles, highlighting its durability and structural stability. Overall, the strong synergistic interaction between g-C₃N₄ and NiMoO₄ enhances light absorption, charge separation, and surface reactivity, establishing this Pt-free g-C₃N₄/NiMoO₄ hybrid as a promising and sustainable candidate for next-generation photovoltaic and photocatalytic applications.</p>

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Pt-Free g-C₃N₄/NiMoO₄ Hybrid: A Multifunctional Material for Solar Energy Conversion and Pollutant Degradation

  • 期刊论文

  • 发表日期：

    2026年6月29日

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  • M. T. Beevi Fathima,
  • V. P. Suresh Kumar,
  • P. Prasanth,
  • S. Arunkumar

摘要

In this work, Pt-free g-C₃N₄/NiMoO₄ hybrid nanocomposites were successfully synthesized via a simple hydrothermal approach and systematically evaluated for their photovoltaic (PV) and photocatalytic performance. XRD analysis confirmed the crystalline nature of NiMoO₄ and revealed its strong interfacial coupling with g-C₃N₄ nanosheets. SEM and TEM observations showed that NiMoO₄ formed uniform microspherical structures, while the incorporation of g-C₃N₄ generated ultrathin sheet-like hybrids, promoting intimate interfacial contact and facilitating efficient charge transport. XPS spectra further validated the chemical bonding and successful coupling between g-C₃N₄ and NiMoO₄. The optimized g-C₃N₄/NiMoO₄-based dye-sensitized solar cell (DSSC) exhibited an impressive power conversion efficiency (PCE) of 8.9 ± 0.5%, surpassing that of bare NiMoO₄ (6.5 ± 0.2%). The double-layer capacitance (Cdl) values, derived from the linear fitting of current density versus scan rate, were 2.5 mF cm⁻² for NiMoO₄ and 17.2 mF cm⁻² for the composite, confirming superior charge storage and transfer capability in the hybrid. Moreover, the g-C₃N₄/NiMoO₄ nanocomposite demonstrated excellent photocatalytic degradation efficiency toward Rhodamine B (RhB), achieving 88% degradation with a rate constant of 33.8 × 10⁻³ min⁻¹. The material maintained high catalytic activity after multiple cycles, highlighting its durability and structural stability. Overall, the strong synergistic interaction between g-C₃N₄ and NiMoO₄ enhances light absorption, charge separation, and surface reactivity, establishing this Pt-free g-C₃N₄/NiMoO₄ hybrid as a promising and sustainable candidate for next-generation photovoltaic and photocatalytic applications.