Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation Method
A simple ultrasonic radiation method was employed for the preparation of zinc and cadmium sulfide solid solution (Zn<sub>x</sub>Cd<sub>1−x</sub>S; x = 0–0.25 wt.%) with the aim to investigate its efficiency for H<sub>2</sub> production via a visible light-driven w...
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doaj-a97f743aceee40c4bb0b51c4e004f0cd2020-11-25T03:34:43ZengMDPI AGEnergies1996-10732020-10-01135603560310.3390/en13215603Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation MethodLuis Fernando Morelos Medina0Rufino Nava1María de los Ángeles Cuán Hernández2Omar Said Yáñez Soria3Bárbara Pawelec4Rufino M. Navarro5Carlos Elías Ornelas Gutiérrez6División de Investigación y Posgrado, Facultad de Ingeniería y Facultad de Química, Universidad Autónoma de Querétaro (UAQ), Centro Universitario, Querétaro 76000, MexicoDivisión de Investigación y Posgrado, Facultad de Ingeniería y Facultad de Química, Universidad Autónoma de Querétaro (UAQ), Centro Universitario, Querétaro 76000, MexicoDivisión de Investigación y Posgrado, Facultad de Ingeniería y Facultad de Química, Universidad Autónoma de Querétaro (UAQ), Centro Universitario, Querétaro 76000, MexicoDivisión de Investigación y Posgrado, Facultad de Ingeniería y Facultad de Química, Universidad Autónoma de Querétaro (UAQ), Centro Universitario, Querétaro 76000, MexicoInstituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, SpainInstituto de Catálisis y Petroleoquímica, CSIC, Cantoblanco, 28049 Madrid, SpainCentro de Investigación en Materiales Avanzados, S.C., Cimav, Av. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua C.P. 31109, MexicoA simple ultrasonic radiation method was employed for the preparation of zinc and cadmium sulfide solid solution (Zn<sub>x</sub>Cd<sub>1−x</sub>S; x = 0–0.25 wt.%) with the aim to investigate its efficiency for H<sub>2</sub> production via a visible light-driven water-splitting reaction. The catalyst characterization by X-ray diffraction confirmed the formation of solid solution (Zn<sub>x</sub>Cd<sub>1−x</sub>S) between CdS and ZnS phases. All catalysts exhibited hierarchical morphology (from SEM and TEM) formed by aggregated nanoparticles of Zn<sub>x</sub>Cd<sub>1−x</sub>S solid solution with crystals showing mainly (111) planes of cubic CdS phase. The crystal size linearly decreased with an increase in Zn incorporation in the crystal lattice (from 4.37 nm to 3.72 nm). The Zn<sub>x</sub>Cd<sub>1−x</sub>S photocatalysts showed a gradual increase in the H<sub>2 </sub>evolution, with an increase in the Zn concentration up to 0.2 wt.% making the most effective Zn<sub>0.2</sub>Cd<sub>0.8</sub>S catalyst toward H<sub>2</sub> production. From the catalyst activity–structure correlation, it has been concluded that the twin-like CdS structure, the (111) plane and specific morphology are the main factors influencing the catalyst effectivity toward H<sub>2 </sub>production. All those factors compensated for the negative effect of an increase in band gap energy<i> </i>(<i>E</i><sub>bg</sub>) after ZnS incorporation into solid solution (from 2.21 eV to 2.34 eV). The effect of the catalyst morphology is discussed by comparing H<sub>2 </sub>evolution over unsupported and supported Zn<sub>0.2</sub>Cd<sub>0.8</sub>S solid solutions.https://www.mdpi.com/1996-1073/13/21/5603ZnxCd1−xSphotocatalystH2 productionsonochemical coprecipitation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Luis Fernando Morelos Medina Rufino Nava María de los Ángeles Cuán Hernández Omar Said Yáñez Soria Bárbara Pawelec Rufino M. Navarro Carlos Elías Ornelas Gutiérrez |
spellingShingle |
Luis Fernando Morelos Medina Rufino Nava María de los Ángeles Cuán Hernández Omar Said Yáñez Soria Bárbara Pawelec Rufino M. Navarro Carlos Elías Ornelas Gutiérrez Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation Method Energies ZnxCd1−xS photocatalyst H2 production sonochemical coprecipitation |
author_facet |
Luis Fernando Morelos Medina Rufino Nava María de los Ángeles Cuán Hernández Omar Said Yáñez Soria Bárbara Pawelec Rufino M. Navarro Carlos Elías Ornelas Gutiérrez |
author_sort |
Luis Fernando Morelos Medina |
title |
Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation Method |
title_short |
Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation Method |
title_full |
Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation Method |
title_fullStr |
Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation Method |
title_full_unstemmed |
Structural, Optical and Photocatalytic Characterization of Zn<sub>x</sub>Cd<sub>1−x</sub>S Solid Solutions Synthetized Using a Simple Ultrasonic Radiation Method |
title_sort |
structural, optical and photocatalytic characterization of zn<sub>x</sub>cd<sub>1−x</sub>s solid solutions synthetized using a simple ultrasonic radiation method |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2020-10-01 |
description |
A simple ultrasonic radiation method was employed for the preparation of zinc and cadmium sulfide solid solution (Zn<sub>x</sub>Cd<sub>1−x</sub>S; x = 0–0.25 wt.%) with the aim to investigate its efficiency for H<sub>2</sub> production via a visible light-driven water-splitting reaction. The catalyst characterization by X-ray diffraction confirmed the formation of solid solution (Zn<sub>x</sub>Cd<sub>1−x</sub>S) between CdS and ZnS phases. All catalysts exhibited hierarchical morphology (from SEM and TEM) formed by aggregated nanoparticles of Zn<sub>x</sub>Cd<sub>1−x</sub>S solid solution with crystals showing mainly (111) planes of cubic CdS phase. The crystal size linearly decreased with an increase in Zn incorporation in the crystal lattice (from 4.37 nm to 3.72 nm). The Zn<sub>x</sub>Cd<sub>1−x</sub>S photocatalysts showed a gradual increase in the H<sub>2 </sub>evolution, with an increase in the Zn concentration up to 0.2 wt.% making the most effective Zn<sub>0.2</sub>Cd<sub>0.8</sub>S catalyst toward H<sub>2</sub> production. From the catalyst activity–structure correlation, it has been concluded that the twin-like CdS structure, the (111) plane and specific morphology are the main factors influencing the catalyst effectivity toward H<sub>2 </sub>production. All those factors compensated for the negative effect of an increase in band gap energy<i> </i>(<i>E</i><sub>bg</sub>) after ZnS incorporation into solid solution (from 2.21 eV to 2.34 eV). The effect of the catalyst morphology is discussed by comparing H<sub>2 </sub>evolution over unsupported and supported Zn<sub>0.2</sub>Cd<sub>0.8</sub>S solid solutions. |
topic |
ZnxCd1−xS photocatalyst H2 production sonochemical coprecipitation |
url |
https://www.mdpi.com/1996-1073/13/21/5603 |
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