Novel ZnS-ZnO composite synthesized by the solvothermal method through the partial sulfidation of ZnO for H<inf>2</inf> production without sacrificial agent

Yanet Piña-Pérez, Octavio Aguilar-Martínez, Próspero Acevedo-Peña, C. E. Santolalla-Vargas, Socorro Oros-Ruíz, Félix Galindo-Hernández, R. Gómez, F. Tzompantzi

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22 Citations (Scopus)

Abstract

© 2018 Elsevier B.V. Novel ZnS-ZnO composites were synthesized by the solvothermal method from the partial sulfidation of ZnO using thiourea at low temperatures. The synthesized materials were active for the photocatalytic production of H2 with and without the presence of sacrificial agent without the addition of a co-catalyst; in the present paper, methanol was evaluated as sacrificial agent, increasing the amount of H2 produced up to five times compared to the most active photocatalyst without using sacrificial agent. All the materials were characterized by XRD, N2 Physisorption, FT-IR, XPS, Diffuse Reflectance Spectroscopy, and HR-TEM. In addition, the materials were characterized by photo-electrochemical techniques to explain the photocatalytic behavior. The most active material was the composite with an atomic ratio of S/Zn = 0.71 synthesized at 100 °C, producing 247 μmol H2 h−1 g−1, the H2 production rate was improved five times with the addition of methanol as sacrificial agent. The improvement of the photocatalytic activity was attributed to the formation of the heterojunction at the interface formed between ZnO and ZnS, promoting a higher electron transfer to the conduction band and a lower charge transfer resistance from the catalyst surface to the solution reaction.
Original languageAmerican English
Pages (from-to)125-134
Number of pages111
JournalApplied Catalysis B: Environmental
DOIs
StatePublished - 15 Aug 2018

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Composite materials
Methanol
methanol
catalyst
Thiourea
Catalysts
Physisorption
Thioureas
Photocatalysts
Conduction bands
X-ray spectroscopy
Heterojunctions
Charge transfer
transmission electron microscopy
reflectance
X ray photoelectron spectroscopy
spectroscopy
X-ray diffraction
Spectroscopy
Transmission electron microscopy

Cite this

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title = "Novel ZnS-ZnO composite synthesized by the solvothermal method through the partial sulfidation of ZnO for H2 production without sacrificial agent",
abstract = "{\circledC} 2018 Elsevier B.V. Novel ZnS-ZnO composites were synthesized by the solvothermal method from the partial sulfidation of ZnO using thiourea at low temperatures. The synthesized materials were active for the photocatalytic production of H2 with and without the presence of sacrificial agent without the addition of a co-catalyst; in the present paper, methanol was evaluated as sacrificial agent, increasing the amount of H2 produced up to five times compared to the most active photocatalyst without using sacrificial agent. All the materials were characterized by XRD, N2 Physisorption, FT-IR, XPS, Diffuse Reflectance Spectroscopy, and HR-TEM. In addition, the materials were characterized by photo-electrochemical techniques to explain the photocatalytic behavior. The most active material was the composite with an atomic ratio of S/Zn = 0.71 synthesized at 100 °C, producing 247 μmol H2 h−1 g−1, the H2 production rate was improved five times with the addition of methanol as sacrificial agent. The improvement of the photocatalytic activity was attributed to the formation of the heterojunction at the interface formed between ZnO and ZnS, promoting a higher electron transfer to the conduction band and a lower charge transfer resistance from the catalyst surface to the solution reaction.",
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Novel ZnS-ZnO composite synthesized by the solvothermal method through the partial sulfidation of ZnO for H<inf>2</inf> production without sacrificial agent. / Piña-Pérez, Yanet; Aguilar-Martínez, Octavio; Acevedo-Peña, Próspero; Santolalla-Vargas, C. E.; Oros-Ruíz, Socorro; Galindo-Hernández, Félix; Gómez, R.; Tzompantzi, F.

In: Applied Catalysis B: Environmental, 15.08.2018, p. 125-134.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Novel ZnS-ZnO composite synthesized by the solvothermal method through the partial sulfidation of ZnO for H2 production without sacrificial agent

AU - Piña-Pérez, Yanet

AU - Aguilar-Martínez, Octavio

AU - Acevedo-Peña, Próspero

AU - Santolalla-Vargas, C. E.

AU - Oros-Ruíz, Socorro

AU - Galindo-Hernández, Félix

AU - Gómez, R.

AU - Tzompantzi, F.

PY - 2018/8/15

Y1 - 2018/8/15

N2 - © 2018 Elsevier B.V. Novel ZnS-ZnO composites were synthesized by the solvothermal method from the partial sulfidation of ZnO using thiourea at low temperatures. The synthesized materials were active for the photocatalytic production of H2 with and without the presence of sacrificial agent without the addition of a co-catalyst; in the present paper, methanol was evaluated as sacrificial agent, increasing the amount of H2 produced up to five times compared to the most active photocatalyst without using sacrificial agent. All the materials were characterized by XRD, N2 Physisorption, FT-IR, XPS, Diffuse Reflectance Spectroscopy, and HR-TEM. In addition, the materials were characterized by photo-electrochemical techniques to explain the photocatalytic behavior. The most active material was the composite with an atomic ratio of S/Zn = 0.71 synthesized at 100 °C, producing 247 μmol H2 h−1 g−1, the H2 production rate was improved five times with the addition of methanol as sacrificial agent. The improvement of the photocatalytic activity was attributed to the formation of the heterojunction at the interface formed between ZnO and ZnS, promoting a higher electron transfer to the conduction band and a lower charge transfer resistance from the catalyst surface to the solution reaction.

AB - © 2018 Elsevier B.V. Novel ZnS-ZnO composites were synthesized by the solvothermal method from the partial sulfidation of ZnO using thiourea at low temperatures. The synthesized materials were active for the photocatalytic production of H2 with and without the presence of sacrificial agent without the addition of a co-catalyst; in the present paper, methanol was evaluated as sacrificial agent, increasing the amount of H2 produced up to five times compared to the most active photocatalyst without using sacrificial agent. All the materials were characterized by XRD, N2 Physisorption, FT-IR, XPS, Diffuse Reflectance Spectroscopy, and HR-TEM. In addition, the materials were characterized by photo-electrochemical techniques to explain the photocatalytic behavior. The most active material was the composite with an atomic ratio of S/Zn = 0.71 synthesized at 100 °C, producing 247 μmol H2 h−1 g−1, the H2 production rate was improved five times with the addition of methanol as sacrificial agent. The improvement of the photocatalytic activity was attributed to the formation of the heterojunction at the interface formed between ZnO and ZnS, promoting a higher electron transfer to the conduction band and a lower charge transfer resistance from the catalyst surface to the solution reaction.

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