Influence of ZnS wurtzite–sphalerite junctions on ZnO <inf>Core</inf> -ZnS <inf>Shell</inf> -1D photocatalysts for H <inf>2</inf> production

Guadalupe Mendoza-Damián, Agileo Hernández-Gordillo, Ma Eufemia Fernández-García, Próspero Acevedo-Peña, Francisco Javier Tzompantzi-Morales, Raúl Pérez-Hernández

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Abstract

© 2019 Hydrogen Energy Publications LLC The ZnO core -ZnS shell like nanoparticles have been prepared in ethanol by the hydrothermal method using different sulfur loading. These kind of nanomaterials were characterized by X-ray diffraction, Scanning and Transmission Electron Microscopy, Photoluminescence, and the surface area was determined by BET method. Photocatalytic H 2 production from ethanol in aqueous solution has been studied at ambient temperature under UV irradiation and molecular simulation was also included. The optimum ZnS contents for H 2 production, from ethanol aqueous solution, on the ZnO core -ZnS shell like nanoparticles were 50 mol% of S loading on ZnO-1D. The H 2 yield was about 1200–1500 μmol/hg obtained under prolonged time irradiation. Experimental results showed that the photocatalytic H 2 production could be enhanced remarkably by depositing a suitable amount of ZnS on ZnO-1D surface. Based on our simulation results, we suggest that the water and ethanol were adsorbed preferentially on the surface of sphalerite than on the wurtzite structure and H 2 is released from the sphalerite structure.
Original languageAmerican English
JournalInternational Journal of Hydrogen Energy
DOIs
StatePublished - 1 Jan 2019

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