Green synthesized CuxO@Cu nanocomposites on a Cu mesh with dual catalytic functions for dye degradation and hydrogen evaluation

Nuha Alhebshi, Hao Huang, Rokiya Ghandour, Nada K. Alghamdi, Ohoud Alharbi, Shahad Aljurban, Jr-Hau He, Hala Al-Jawhari

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Here we introduce an ecological facile method to grow heterogeneous copper oxide (CuxO) nanocomposites on a Cu mesh using spinach leaf extract. After annealing at different temperatures, morphological and structural characterizations revealed that samples annealed at 300 °C comprise the highest Cu+/Cu2+ ratio and reveal the most porous structure. Such samples exhibited dual catalytic functions as both photocatalysts for dye degradation, and electrocatalysts for hydrogen evolution. Their photocatalytic activity for degradation of methylene blue (MB) was investigated under sunlight irradiation of 7 mW/cm2. A complete degradation, with an average kinetic rate of 63.2 m min−1, was achieved after 60 min. Moreover, the samples revealed a good electrochemical catalytic property for hydrogen evolution reaction (HER) in acidic medium. They exhibited HER onset at 357 mV with a small charge transfer resistance of 8.2 Ω. Such promising outcomes could open a new path for mass-production applications in water-energy fields.
Original languageEnglish (US)
Pages (from-to)156284
JournalJournal of Alloys and Compounds
Volume848
DOIs
StatePublished - Jul 30 2020

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