A high-performance S-scheme based Ti3C2Tx Mxene-enhanced S-g-C3N4/NiAl layered double hydroxide ternary heterojunction photocatalyst for sustainable hydrogen production

Bilal A., Bahadur A., Khan M. S., Khan I., Ali S., Iqbal S., ...daha çox

Journal of Power Sources, vol.653, 2025 (SCI-Expanded, Scopus) identifier identifier

  • Nəşrin Növü: Article / Article
  • Cild: 653
  • Nəşr tarixi: 2025
  • Doi nömrəsi: 10.1016/j.jpowsour.2025.237792
  • jurnalın adı: Journal of Power Sources
  • Jurnalın baxıldığı indekslər: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Pollution Abstracts, Civil Engineering Abstracts
  • Açar sözlər: Hydrogen production, Layered double hydroxide (LDH), MXene, Photocatalysis, S-Scheme heterojunction
  • Açıq Arxiv Kolleksiyası: Məqalə
  • Adres: Bəli

Qısa məlumat

The search for economical, long-lasting, and useful photocatalysts for hydrogen (H2) generation has continued for decades. A new S-scheme ternary heterojunction photocatalyst is developed in this study by incorporating (Ti3C2Tx) Mxene into the binary heterojunction of sulfur-doped graphitic carbon nitride (S-g-C3N4) and NiAl-layered double hydroxide (NiAl-LDH). The ternary heterojunction, made using the hydrothermal process, demonstrated superior structural layering and optimally intimate interfacial connections, significantly improving the photocatalytic generation of H2 upon visible light irradiation. By systematic investigations at various catalyst loadings, the optimal formulation of the developed step-scheme (S-scheme) hybrid heterojunction Mxene/S-g-C3N4/NiAl-LDH (12 wt% Mxene) heterojunction has an impressive photocatalytic activity of 72.63 mmol H2 g−1h−1 exhibiting a remarkably elevated apparent quantum yield (AQY) of 79.88 % and solar-to-hydrogen (STH) conversion efficiency of 31.86 % at 420 nm. In addition to recyclability, Mxene/S-g-C3N4/NiAl-LDH heterojunction showed outstanding photostability of 192 h in continuous operation. The long-lasting photostability can be ascribed to reduced electron-hole recombination and enhanced charge migration due to the close contact between Mxene and S-g-C3N4 via suitable S-scheme heterojunction formation. Our findings underline the optimum layered structure and intimate interfacial contact of the component materials to promote photocatalytic H2 production and open a promising route toward sustainable H2 generation technologies.