Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S Photocatalysts
Photocatalytic H<sub>2</sub> production utilizing H<sub>2</sub>S, an industrial side-product, is regarded as an environmentally friendly process to produce clean energy through direct solar energy conversion. For this purpose, sulfide-based materials, such as photocatalysts,...
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MDPI AG
2021-12-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/12/1534 |
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| author | Maali-Amel Mersel Lajos Fodor Péter Pekker Miklós Jakab Éva Makó Ottó Horváth |
| author_facet | Maali-Amel Mersel Lajos Fodor Péter Pekker Miklós Jakab Éva Makó Ottó Horváth |
| author_sort | Maali-Amel Mersel |
| collection | DOAJ |
| description | Photocatalytic H<sub>2</sub> production utilizing H<sub>2</sub>S, an industrial side-product, is regarded as an environmentally friendly process to produce clean energy through direct solar energy conversion. For this purpose, sulfide-based materials, such as photocatalysts, have been widely used due to their good solar response and high photocatalytic activity. In this work, a ZnS–CdS composite was studied, and special attention was dedicated to the influence of the preparation parameters on its H<sub>2</sub> production activity. The ZnS–CdS composite, with an enhanced photoactivity for H<sub>2</sub> production, was synthesized both from ammine complexes and, in a conventional way, directly from acetates at various pH values. Deviating from the traditional method, the photoactivity of ZnS–CdS prepared from ammine complexes was not affected by the pH. Besides, the hydrothermal treatment and the ammonia content strongly influenced the rate of H<sub>2</sub> production in this system. DRS, TEM, SEM, XRD, and quantum yield measurements prove the dependence of the photoactivity of these catalysts on the structural and morphological properties determined by the preparation conditions. The promising photocatalytic efficiency achieved with the application of these ZnS–CdS catalysts, prepared without any metal deposition, encourages further investigations to enhance the rate of hydrogen generation by optimization of the reaction conditions for practical utilization. |
| first_indexed | 2024-03-10T04:26:45Z |
| format | Article |
| id | doaj.art-61a0828153c141c4a6cd53805542ad81 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T04:26:45Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-61a0828153c141c4a6cd53805542ad812023-11-23T07:35:03ZengMDPI AGCatalysts2073-43442021-12-011112153410.3390/catal11121534Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S PhotocatalystsMaali-Amel Mersel0Lajos Fodor1Péter Pekker2Miklós Jakab3Éva Makó4Ottó Horváth5Research Group of Environmental and Inorganic Photochemistry, Center for Natural Sciences, Faculty of Engineering, University of Pannonia, P.O.B. 1158, H-8210 Veszprem, HungaryResearch Group of Environmental and Inorganic Photochemistry, Center for Natural Sciences, Faculty of Engineering, University of Pannonia, P.O.B. 1158, H-8210 Veszprem, HungaryEnvironmental Mineralogy Research Group, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, P.O.B. 1158, H-8210 Veszprem, HungaryResearch Center for Engineering Sciences, Department of Materials Engineering, University of Pannonia, P.O.B. 1158, H-8210 Veszprem, HungaryResearch Center for Engineering Sciences, Department of Materials Engineering, University of Pannonia, P.O.B. 1158, H-8210 Veszprem, HungaryResearch Group of Environmental and Inorganic Photochemistry, Center for Natural Sciences, Faculty of Engineering, University of Pannonia, P.O.B. 1158, H-8210 Veszprem, HungaryPhotocatalytic H<sub>2</sub> production utilizing H<sub>2</sub>S, an industrial side-product, is regarded as an environmentally friendly process to produce clean energy through direct solar energy conversion. For this purpose, sulfide-based materials, such as photocatalysts, have been widely used due to their good solar response and high photocatalytic activity. In this work, a ZnS–CdS composite was studied, and special attention was dedicated to the influence of the preparation parameters on its H<sub>2</sub> production activity. The ZnS–CdS composite, with an enhanced photoactivity for H<sub>2</sub> production, was synthesized both from ammine complexes and, in a conventional way, directly from acetates at various pH values. Deviating from the traditional method, the photoactivity of ZnS–CdS prepared from ammine complexes was not affected by the pH. Besides, the hydrothermal treatment and the ammonia content strongly influenced the rate of H<sub>2</sub> production in this system. DRS, TEM, SEM, XRD, and quantum yield measurements prove the dependence of the photoactivity of these catalysts on the structural and morphological properties determined by the preparation conditions. The promising photocatalytic efficiency achieved with the application of these ZnS–CdS catalysts, prepared without any metal deposition, encourages further investigations to enhance the rate of hydrogen generation by optimization of the reaction conditions for practical utilization.https://www.mdpi.com/2073-4344/11/12/1534photocatalysishydrogen generationvisible-light-drivensolar energy conversionZnS–CdS compositepreparation conditions |
| spellingShingle | Maali-Amel Mersel Lajos Fodor Péter Pekker Miklós Jakab Éva Makó Ottó Horváth Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S Photocatalysts Catalysts photocatalysis hydrogen generation visible-light-driven solar energy conversion ZnS–CdS composite preparation conditions |
| title | Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S Photocatalysts |
| title_full | Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S Photocatalysts |
| title_fullStr | Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S Photocatalysts |
| title_full_unstemmed | Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S Photocatalysts |
| title_short | Effects of Preparation Conditions on the Efficiency of Visible-Light-Driven Hydrogen Generation Based on Cd<sub>0.25</sub>Zn<sub>0.75</sub>S Photocatalysts |
| title_sort | effects of preparation conditions on the efficiency of visible light driven hydrogen generation based on cd sub 0 25 sub zn sub 0 75 sub s photocatalysts |
| topic | photocatalysis hydrogen generation visible-light-driven solar energy conversion ZnS–CdS composite preparation conditions |
| url | https://www.mdpi.com/2073-4344/11/12/1534 |
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