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Pt-decorated CuO nanosheets and their application in the visible light photocatalytic water splitting reaction

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Abstract

CuO nanocompositions found many applications in chemistry and physics. However, its large band gap and charge carrier recombination when used as a photo catalyst hinder its effectiveness. In this paper we report a simple sol–gel method for the synthesis of mesoporous CuO nanosheets followed by the application of photo-assisted Pt incorporation to produce a uniformly Pt-decorated mesoporous CuO nanosheets. The nanosheet structure, crystallinity, morphology, and particle-size were confirmed employing XRD measurements, transition electron microscopy. The synthesized mesoporous Pt/CuO nanosheets showed high pore volumes of 0.350 cm3/g and a large surface area of 250 m2/g. The effectiveness of the photocatalyst was tested via application in the water splitting reaction under visible light and the use of glycerol as a positive hole scavenger. Pt/CuO yielded ~ 5400 µmol/g of H2, 7-times higher compared to pure mesoporous CuO. Higher efficiency is explained by narrower band gap, superior light harvesting capacity, and the efficient charge-carrier separation due to the use of glycerol. Photocurrent and photoluminescence were used to show the effect of Pt decoration on the photocatalytic efficiency of the material through the electron transfer from CuO to Pt atoms.

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Acknowledgements

This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, Saudi Arabia under Grant no. DF-108-130-1441. The authors, therefore, acknowledge with thanks DSR for technical and financial support.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Kingdom of Saudi Arabia

    Mohammad W. Kadi & Reda M. Mohamed

  2. Advanced Materials Department, Central Metallurgical R&D Institute, CMRDI, P.O. Box 87, Helwan, 11421, Cairo, Egypt

    Reda M. Mohamed

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  1. Mohammad W. Kadi
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  2. Reda M. Mohamed
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Correspondence to Reda M. Mohamed.

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Kadi, M.W., Mohamed, R.M. Pt-decorated CuO nanosheets and their application in the visible light photocatalytic water splitting reaction. Appl Nanosci 10, 4291–4298 (2020). https://doi.org/10.1007/s13204-020-01534-4

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  • DOI: https://doi.org/10.1007/s13204-020-01534-4

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