Green synthesized CuxO@Cu nanocomposites on a Cu mesh with dual catalytic functions for dye degradation and hydrogen evaluation
Type
ArticleAuthors
Alhebshi, NuhaHuang, Hao
Ghandour, Rokiya
Alghamdi, Nada K.
Alharbi, Ohoud
Aljurban, Shahad
He, Jr-Hau

Al-Jawhari, Hala
KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
KAUST Catalysis Center (KCC)
KAUST Solar Center (KSC)
Nano Energy Lab
Physical Science and Engineering (PSE) Division
Date
2020-07-30Online Publication Date
2020-07-30Print Publication Date
2020-12Embargo End Date
2022-08-10Submitted Date
2020-03-25Permanent link to this record
http://hdl.handle.net/10754/664614
Metadata
Show full item recordAbstract
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.Citation
Alhebshi, 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.2020.156284Sponsors
This 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.Publisher
Elsevier BVJournal
Journal of Alloys and CompoundsAdditional Links
https://linkinghub.elsevier.com/retrieve/pii/S0925838820326487ae974a485f413a2113503eed53cd6c53
10.1016/j.jallcom.2020.156284