Green synthesized CuxO@Cu nanocomposites on a Cu mesh with dual catalytic functions for dye degradation and hydrogen evaluation
Alghamdi, Nada K.
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
KAUST Catalysis Center (KCC)
KAUST Solar Center (KSC)
Nano Energy Lab
Physical Science and Engineering (PSE) Division
Online Publication Date2020-07-30
Print Publication Date2020-12
Embargo End Date2022-08-10
Permanent link to this recordhttp://hdl.handle.net/10754/664614
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AbstractHere 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.
CitationAlhebshi, N., Huang, H., Ghandour, R., Alghamdi, N. K., Alharbi, O., Aljurban, S., … Al-Jawhari, H. (2020). Green synthesized CuxO@Cu nanocomposites on a Cu mesh with dual catalytic functions for dye degradation and hydrogen evaluation. Journal of Alloys and Compounds, 848, 156284. doi:10.1016/j.jallcom.2020.156284
SponsorsThis work was supported by the Science Research and Innovation Unit at KAU and Mawakeb Alajer. The XPS and SEM characterizations were conducted at the Nanotechnology Center at KAU.
JournalJournal of Alloys and Compounds