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Sustainability 2015, 7(7), 9310-9325; doi:10.3390/su7079310

Hydrogen Production from Water by Photolysis, Sonolysis and Sonophotolysis with Solid Solutions of Rare Earth, Gallium and Indium Oxides as Heterogeneous Catalysts

1
Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto, 8, 06123 Perugia, Italy
2
Inter-University Research Center on Pollution and Environment "Mauro Felli" (CIRIAF), Via G. Duranti 67, 06125 Perugia, Italy
3
Centre of Excellence on Nanostructured Innovative Materials (CEMIN), Università di Perugia, via Elce di Sotto 8, 06123 Perugia, Italy
4
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Perugia, Via Pascoli, 06123 Perugia, Italy
Current Affiliation: Instituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), via C. Golgi 19, 20133 Milano, Italy;
*
Author to whom correspondence should be addressed.
Academic Editor: Marc A. Rosen
Received: 18 May 2015 / Revised: 8 July 2015 / Accepted: 10 July 2015 / Published: 16 July 2015
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Abstract

In this work, we present the hydrogen production by photolysis, sonolysis and sonophotolysis of water in the presence of newly synthesized solid solutions of rare earth, gallium and indium oxides playing as catalysts. From the experiments of photolysis, we found that the best photocatalyst is the solid solution Y0.8Ga0.2InO3 doped by sulphur atoms. In experiments of sonolysis, we optimized the rate of hydrogen production by changing the amount of water, adding ethanol and tuning the power of our piezoelectric transducer. Finally, we performed sonolysis and sonophotolysis experiments in the presence of S:Y0.8Ga0.2InO3 finding a promising synergistic effect of UV-visible electromagnetic waves and 38 kHz ultrasound waves in producing H2. View Full-Text
Keywords: hydrogen energy; solar energy; photocatalysis; sonochemistry; synergy; metal oxides; sulphur-doping hydrogen energy; solar energy; photocatalysis; sonochemistry; synergy; metal oxides; sulphur-doping
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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. (CC BY 4.0).

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MDPI and ACS Style

Penconi, M.; Rossi, F.; Ortica, F.; Elisei, F.; Gentili, P.L. Hydrogen Production from Water by Photolysis, Sonolysis and Sonophotolysis with Solid Solutions of Rare Earth, Gallium and Indium Oxides as Heterogeneous Catalysts. Sustainability 2015, 7, 9310-9325.

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