TY - JOUR
T1 - Efficient ZnO1-xSx composites from the Zn5(CO3)2(OH)6 precursor for the H2 production by photocatalysis
AU - Aguilar-Martínez, Octavio
AU - Hernández-Gordillo, Agileo
AU - Pérez-Hernández, Raúl
AU - Acevedo-Peña, Próspero
AU - Arrieta-Castañeda, Alma
AU - Gómez, Ricardo
AU - Tzompantzi, Francisco
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017
Y1 - 2017
N2 - ZnO1-xSx (x = 0.2, 0.5, 0.7, and 1.0) composites were prepared from the hydrozincite precursor (Zn5(CO3)2(OH)6) as Zn source by sulfidation during the solvothermal treatment using thiourea as sulfur source at different molar ratio. The sulfurized composites were characterized by XRD, FTIR, TGA, SEM-EDS, N2 physisorption, UV–vis diffuse reflectance spectroscopy, and photoluminescence. Additionally, photocatalysts were deposited onto ITO coated supports to perform their photoelectrochemical characterization. The sulfurized samples were composed of cubic-ZnO and cubic-ZnS with proportions close to the theoretical ones, given a ZnO1-xSx heterostructures. Mesoporous composites with large specific surface area (up to 207 m2 g−1) were obtained. All the obtained composites were evaluated in the production of H2 from a MetOH-water solution and UV light. The photocatalytic stability of the best composite was also evaluated for five reaction cycles. The photocatalytic properties of the ZnO1-xSx composite is explained as a function of the generation capacity of electron-hole pairs when the photocalyst is illuminated jointly with the charge transfer resistance of photocatalysts in a methanol-water solution.
AB - ZnO1-xSx (x = 0.2, 0.5, 0.7, and 1.0) composites were prepared from the hydrozincite precursor (Zn5(CO3)2(OH)6) as Zn source by sulfidation during the solvothermal treatment using thiourea as sulfur source at different molar ratio. The sulfurized composites were characterized by XRD, FTIR, TGA, SEM-EDS, N2 physisorption, UV–vis diffuse reflectance spectroscopy, and photoluminescence. Additionally, photocatalysts were deposited onto ITO coated supports to perform their photoelectrochemical characterization. The sulfurized samples were composed of cubic-ZnO and cubic-ZnS with proportions close to the theoretical ones, given a ZnO1-xSx heterostructures. Mesoporous composites with large specific surface area (up to 207 m2 g−1) were obtained. All the obtained composites were evaluated in the production of H2 from a MetOH-water solution and UV light. The photocatalytic stability of the best composite was also evaluated for five reaction cycles. The photocatalytic properties of the ZnO1-xSx composite is explained as a function of the generation capacity of electron-hole pairs when the photocalyst is illuminated jointly with the charge transfer resistance of photocatalysts in a methanol-water solution.
KW - H production
KW - Hydrozincite
KW - Solvothermal
KW - ZnOS composite
UR - http://www.scopus.com/inward/record.url?scp=85019835943&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2017.05.049
DO - 10.1016/j.renene.2017.05.049
M3 - Artículo
SN - 0960-1481
VL - 113
SP - 43
EP - 51
JO - Renewable Energy
JF - Renewable Energy
ER -