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Sunlight driven Eu2O3/CoNiZn-LDH@g-C3N4 ternary heterojunction nanocomposite photocatalyst for hydrogen generation

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  • Maridevaru, Madappa C.
  • Al Marzouqi, Faisal
  • Nagaveni, Munnelli
  • Kumari, Murikinati Mamatha
  • Shankar, Muthukonda Venkatakrishnan
  • Selvaraj, Rengaraj

Abstract

Photocatalytic H2 generation is a prospective and ecologically suitable way of manufacturing green hydrogen (H2). However, finding the best semiconducting substances with considerable performance is not easy. Inspired by this problem, we suggest in this work the use of a simple impregnation method for the customized sunlight-activated configurable broad-band gap semiconductor by coupling graphitic carbon nitride (CN) with Eu2O3/CoNiZn-LDH (LDH). Herein demonstrated the LDH loading on g-C3N4 surface impacted photocatalytic function by examining the hybrid ternary nanocomposites' microscopic, spectroscopic, and photophysical properties. Under sunlight, 60 wt% of Eu2O3/CoNiZn-LDH@g-C3N4 (60-LDHCN) nanocomposite exhibited highest rate of H2 production (168.5 μmol h−1g−1cat) explained by both density of catalytic active sites and intimate interface between different components of the catalyst facilitated effective separation/utilization of photogenerated electron-hole pairs. This correspondingly led to a 4.7-fold and 3.2-fold increase in H2 generating efficiency of compared to CN (36.2 μmol h−1g−1cat) and LDH (51.25 μmol h−1g−1cat). Evidently, the photocurrent concentration of the 60-LDHCN nanocomposite depicted around 14.3 and 6.1 times better photocurrent than that of CN and LDH, respectively. The essential component of Type-II heterojunctions' immediate interaction between the semiconductors promoted charge separation and enhanced the number of surface-active sites through the absorption of sunlight.

Suggested Citation

  • Maridevaru, Madappa C. & Al Marzouqi, Faisal & Nagaveni, Munnelli & Kumari, Murikinati Mamatha & Shankar, Muthukonda Venkatakrishnan & Selvaraj, Rengaraj, 2025. "Sunlight driven Eu2O3/CoNiZn-LDH@g-C3N4 ternary heterojunction nanocomposite photocatalyst for hydrogen generation," Renewable Energy, Elsevier, vol. 246(C).
    • Handle: RePEc:eee:renene:v:246:y:2025:i:c:s0960148125005798
    DOI: 10.1016/j.renene.2025.122917
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    References listed on IDEAS

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    1. Glen P. Peters & Robbie M. Andrew & Josep G. Canadell & Sabine Fuss & Robert B. Jackson & Jan Ivar Korsbakken & Corinne Le Quéré & Nebojsa Nakicenovic, 2017. "Key indicators to track current progress and future ambition of the Paris Agreement," Nature Climate Change, Nature, vol. 7(2), pages 118-122, February.
    2. Hosseini, Seyed Ehsan & Wahid, Mazlan Abdul, 2016. "Hydrogen production from renewable and sustainable energy resources: Promising green energy carrier for clean development," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 850-866.
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