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Photocatalytic Hydrogen Production from Glycerol Aqueous Solution Using Cu-Doped ZnO under Visible Light Irradiation

Department of Industrial Engineering, University of Salerno, via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy
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Appl. Sci. 2019, 9(13), 2741; https://doi.org/10.3390/app9132741
Received: 17 May 2019 / Revised: 24 June 2019 / Accepted: 24 June 2019 / Published: 6 July 2019
(This article belongs to the Special Issue Cu and Cu-Based Nanoparticles: Applications in Catalysis)
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Abstract

Cu-doped ZnO photocatalysts at different Cu loadings were prepared by a precipitation method. The presence of Cu in the ZnO crystal lattice led to significant enhancement in photocatalytic activity for H2 production from an aqueous glycerol solution under visible light irradiation. The best Cu loading was found to be 1.08 mol %, which allowed achieving hydrogen production equal to 2600 μmol/L with an aqueous glycerol solution at 5 wt % initial concentration, the photocatalyst dosage equal to 1.5 g/L, and at the spontaneous pH of the solution (pH = 6). The hydrogen production rate was increased to about 4770 μmol/L by increasing the initial glycerol concentration up to 10 wt %. The obtained results evidenced that the optimized Cu-doped ZnO could be considered a suitable visible-light-active photocatalyst to be used in photocatalytic hydrogen production without the presence of noble metals in sample formulation. View Full-Text
Keywords: photocatalysis; visible light; Cu-doped ZnO; hydrogen; glycerol photocatalysis; visible light; Cu-doped ZnO; hydrogen; glycerol
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Vaiano, V.; Iervolino, G. Photocatalytic Hydrogen Production from Glycerol Aqueous Solution Using Cu-Doped ZnO under Visible Light Irradiation. Appl. Sci. 2019, 9, 2741.

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