Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Visible – Light Driven Systems: Effect of the Parameters Affecting Hydrogen Production through Photoreforming of Organics in Presence of Cu2O/TiO2 Nanocomposite Photocatalyst

Marica Muscetta
* ORCID logo ,
Laura Clarizia
* ,
Marco Race
ORCID logo ,
Roberto Andreozzi
,
Raffaele Marotta
ORCID logo ,
Ilaria Di Somma
Version 1 : Received: 25 January 2023 / Approved: 27 January 2023 / Online: 27 January 2023 (09:53:35 CET)

A peer-reviewed article of this Preprint also exists.

Muscetta, M.; Clarizia, L.; Race, M.; Andreozzi, R.; Marotta, R.; Di Somma, I. Visible—Light Driven Systems: Effect of the Parameters Affecting Hydrogen Production through Photoreforming of Organics in Presence of Cu2O/TiO2 Nanocomposite Photocatalyst. Appl. Sci. 2023, 13, 2337. Muscetta, M.; Clarizia, L.; Race, M.; Andreozzi, R.; Marotta, R.; Di Somma, I. Visible—Light Driven Systems: Effect of the Parameters Affecting Hydrogen Production through Photoreforming of Organics in Presence of Cu2O/TiO2 Nanocomposite Photocatalyst. Appl. Sci. 2023, 13, 2337.

Abstract

Several studies have shown that combining TiO2 and Cu2O enhances the photocatalytic activity of the material by generating a heterojunction capable of extending the light absorption in the visible and reducing the electron-hole recombination rate. Ball milling has been chosen as an alternative methodology for photocatalyst preparation, among the several techniques documented in the literature review. The results of a previously reported investigation enabled the identification of the most effective photocatalyst that can be prepared for hydrogen generation by combining Cu2O and TiO2 (i.e., 1%wt Cu2O in TiO2 photocatalyst prepared by ball-milling method at 200 rpm and 1 min milling time). To optimize photocatalytic hydrogen generation in the presence of the greatest photocatalyst, the effects of (i) sacrificial species and their concentration, (ii) temperature, and (iii) pH of the system are taken into account, resulting in a light-to-chemical energy efficiency of 8% under the best-tested conditions. Last but not least, the possibility of using the present photocatalytic system under direct solar light irradiation is evaluated: the results indicate that nearly 60% of the hydrogen production recorded under sunlight can be attributed to the visible component of the solar spectrum, while the remaining 40% can be attributed to the UV component.

Keywords

Green hydrogen; Photoreforming; ball milling; cuprous oxide; solar photocatalysis

Subject

Engineering, Chemical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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