20.500.12556/RUL-185801 Noble metal-free zeolitic imidazolate framework-based composite for photocatalytic production of green hydrogen Photocatalytic water splitting could become a major pillar in addressing future demands for carbon-free energy supply. To develop noble-metal-free photocatalyst microstructures, a heterostructure photocatalytic system containing hexagonal Zeolitic Imidazolate Framework-8 (ZIF-8) and oxygen-deficient spherical CuWO▫$_{4}$▫ nanoparticles was designed. In addition to preventing CuWO▫$_{4}$▫ aggregation, ZIF-8 promotes the accessibility of active sites, interfacial charge transfer, and separation in the ZIF-8@CuWO▫$_{4}$▫ composite. In this composite, UV-visible diffuse reflectance spectroscopy reveals substantial light absorption in the UV range, while photoluminescence spectroscopy indicates suppressed electron-hole recombination relative to pristine materials. The as-synthesised ZIF-8@CuWO▫$_{4}$▫ exhibits a photocatalytic H▫$_{2}$▫ evolution rate of 2,531 μmol g▫$^{-1}$▫ h▫$^{-1}$▫ under UV irradiation, higher than that of pristine ZIF-8 and CuWO▫$_{4}$▫. The composite achieves a maximum H▫$_{2}$▫ production rate of 79 μmol g▫$^{-1}$▫ h▫$^{-1}$▫ under visible light irradiation using Na▫$_{2}$▫S/Na▫$_{2}$▫SO▫$_{3}$▫ (0.35/0.25 M) as the sacrificial hole scavenger. These results highlight that integrating ZIF-8 with CuWO▫$_{4}$▫ could offer an effective option for improving photocatalytic green hydrogen production in CuWO▫$_{4}$▫-based heterojunction systems. CuWO4 composites green hydrogen production water splitting ZIF-8 CuWO4 kompoziti proizvodnja zelenega vodika razcep vode ZIF-8 true false true Angleški jezik Slovenski jezik Članek v reviji 2026-08-20 13:46:52 2026-08-20 13:47:00 2026-08-21 04:30:29 0000-00-00 00:00:00 2026 0 0 23 str. Vol. 6, art. 20260107 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.526.5:678.061 2770-2995 10.20517/microstructures.2026.58 288336899 Iqbal_..._Noble_metal-free_....pdf Iqbal_..._Noble_metal-free_....pdf 1 1EC8C5BB486E52FD5B3E6192F9E9FA60 04201596f953a27c60a0adbc858d3f85bce781f3a55587b0bffec82bfd5a80f3 c6ad4d45-9c8c-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=244783 https://www.oaepublish.com/articles/microstructures.2026.58 1 7e8ea424-9c8c-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=244782 Fakulteta za strojništvo 0 0 0