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Article

CdS Photocatalysts Modified with Ag: Effect of the Solvothermal Temperature on the Structure and Photoactivity for Hydrogen Production

Instituto de Catálisis y Petroleoquímica (CSIC), C/Marie Curie 2, Cantoblanco, 28049 Madrid, Spain
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Catalysts 2019, 9(2), 110; https://doi.org/10.3390/catal9020110
Received: 14 December 2018 / Revised: 14 January 2019 / Accepted: 15 January 2019 / Published: 22 January 2019
(This article belongs to the Special Issue Photocatalysis Science and Engineering in Europe)
This work studies the effect of the temperature in the solvothermal synthesis of CdS modified with Ag (Ag-CdS) over both the structure of CdS and the chemical state of the Ag species. The increase in the solvothermal temperature produces the evolution of the CdS nanostructures from nanoparticles of low crystallinity in coexistence with small nanocrystals with strong confinement effect to the formation of highly crystalline nanorods. The Ag species also change with the solvothermal temperature from Ag2S species, formed at low temperature, to metallic species as the temperature increases. The photoactivity of the Ag-CdS samples is the result of the combination of three factors: crystallinity of the CdS structures, existence of small nanocrystals with strong confinement effect and the presence of segregated Ag2S species. The Ag-CdS sample prepared at 120 °C shows the better efficiency for hydrogen production because it achieves the better combination of the aforementioned factors. View Full-Text
Keywords: CdS; Ag; solvothermal; water splitting; hydrogen production; photocatalysis; temperature CdS; Ag; solvothermal; water splitting; hydrogen production; photocatalysis; temperature
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MDPI and ACS Style

Soto, E.; Vaquero, F.; Mota, N.; Navarro, R.M.; Fierro, J.L.G. CdS Photocatalysts Modified with Ag: Effect of the Solvothermal Temperature on the Structure and Photoactivity for Hydrogen Production. Catalysts 2019, 9, 110. https://doi.org/10.3390/catal9020110

AMA Style

Soto E, Vaquero F, Mota N, Navarro RM, Fierro JLG. CdS Photocatalysts Modified with Ag: Effect of the Solvothermal Temperature on the Structure and Photoactivity for Hydrogen Production. Catalysts. 2019; 9(2):110. https://doi.org/10.3390/catal9020110

Chicago/Turabian Style

Soto, Erika, Fernando Vaquero, Noelia Mota, Rufino M. Navarro, and Jose L.G. Fierro 2019. "CdS Photocatalysts Modified with Ag: Effect of the Solvothermal Temperature on the Structure and Photoactivity for Hydrogen Production" Catalysts 9, no. 2: 110. https://doi.org/10.3390/catal9020110

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