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<p>Polymer-supported photocatalysts provide an effective route to enhance charge separation and stability for solar hydrogen production. In this study, L-cysteine-functionalized poly(methyl methacrylate) (PMMA) was synthesized via emulsion polymerization and employed as a support to anchor CuO-based nanoparticles, forming a novel PMC–Cu nanocomposite. The novelty of this work lies in the use of L-cysteine functionalization to strengthen interfacial coupling, improve nanoparticle dispersion, and suppress agglomeration. Structural and optical characterization (XRD, FTIR, SEM, and UV–vis DRS) confirmed the formation of monoclinic CuO with nanosheet-like morphology (average crystallite size of ~ 16&#xa0;nm) and enhanced light absorption properties. Optical measurements indicated a band gap of 1.43&#xa0;eV for PM-C–Cu1 and two direct band gaps (1.39 and 1.93&#xa0;eV) for PM-C–Cu2. Photocatalytic revealed a significantly improved hydrogen evolution performance and apparent quantum yield (AQY). Under visible-light irradiation (29 mW cm⁻²) for 30&#xa0;min using 50&#xa0;mg of photocatalyst, PMC–Cu2 exhibited the highest photocatalytic activity, achieving 9.8 mL of H₂, with an AQY of 2.71%. The enhanced activity is attributed to efficient charge separation, extended visible-light absorption, and the high surface area of the nanosheet structures. These findings demonstrate that PM-C–Cu nanocomposites are promising candidates for efficient visible-light-driven H₂ production.</p>

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Novel Photocatalyst Based on PMMA-Cysteine Nanosphere-supported CuO-nanosheet for Hydrogen Generation

  • 期刊论文

  • 发表日期：

    2026年6月26日

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  • Karima Agoudjil,
  • Nabila Haddadine,
  • Khadidja Chabni,
  • Amel Boudjemaa,
  • Naima Bouslah,
  • Zakia Dria

摘要

Polymer-supported photocatalysts provide an effective route to enhance charge separation and stability for solar hydrogen production. In this study, L-cysteine-functionalized poly(methyl methacrylate) (PMMA) was synthesized via emulsion polymerization and employed as a support to anchor CuO-based nanoparticles, forming a novel PMC–Cu nanocomposite. The novelty of this work lies in the use of L-cysteine functionalization to strengthen interfacial coupling, improve nanoparticle dispersion, and suppress agglomeration. Structural and optical characterization (XRD, FTIR, SEM, and UV–vis DRS) confirmed the formation of monoclinic CuO with nanosheet-like morphology (average crystallite size of ~ 16 nm) and enhanced light absorption properties. Optical measurements indicated a band gap of 1.43 eV for PM-C–Cu1 and two direct band gaps (1.39 and 1.93 eV) for PM-C–Cu2. Photocatalytic revealed a significantly improved hydrogen evolution performance and apparent quantum yield (AQY). Under visible-light irradiation (29 mW cm⁻²) for 30 min using 50 mg of photocatalyst, PMC–Cu2 exhibited the highest photocatalytic activity, achieving 9.8 mL of H₂, with an AQY of 2.71%. The enhanced activity is attributed to efficient charge separation, extended visible-light absorption, and the high surface area of the nanosheet structures. These findings demonstrate that PM-C–Cu nanocomposites are promising candidates for efficient visible-light-driven H₂ production.