Composite Photocatalysts Based on Cd1-xZnxS and TiO2 for Hydrogen Production under Visible Light: Effect of Platinum co-Catalyst Location Full article
| Journal |
RSC Advances
ISSN: 2046-2069 |
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| Output data | Year: 2021, Volume: 11, Number: 60, Pages: 37966-37980 Pages count : 15 DOI: 10.1039/d1ra06845h | ||
| Tags | Cadmium sulfide; Heterojunctions; Hydrogen production; II-VI semiconductors; Light; Photocatalysis; Photocatalysts; Platinum; Solutions; Ultraviolet visible spectroscopy; Zinc sulfide | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 20-33-70086 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0011 |
Abstract:
Ternary composite photocatalysts based on titania and solid solutions of CdS and ZnS were prepared and studied by a set of physicochemical methods including XRD, XPS, HRTEM, UV-vis spectroscopy, and electrochemical tests. Two synthetic techniques of platinization of Cd1-xZnxS/TiO2 were compared. In the first case, platinum was deposited on the surface of synthesized Cd1-xZnxS (x = 0.2–0.3)/TiO2 P25; in the second one, Cd1-xZnxS (x = 0.2–0.3) was deposited on the surface of Pt/TiO2 P25. The photocatalytic properties of the obtained samples were compared in the hydrogen evolution from TEOA aqueous solution under visible light (λ = 425 nm). The Cd1-xZnxS (10–50 wt%; x = 0.2–0.3)/Pt (1 wt%)/TiO2 photocatalysts demonstrated much higher photocatalytic activity than the Pt (1 wt%)/Cd1-xZnxS (10–50 wt%; x = 0.2–0.3)/TiO2 ones. It turned out that the arrangement of platinum nanoparticles precisely on the titanium dioxide surface in a composite photocatalyst makes it possible to achieve efficient charge separation according to the type II heterojunctions and, accordingly, a high rate of hydrogen formation. The highest photocatalytic activity was demonstrated by 20% Cd0.8Zn0.2S/1% Pt/TiO2 in the amount of 26 mmol g−1 h−1 (apparent quantum efficiency was 7.7%) that exceeds recently published values for this class of photocatalysts.
Cite:
Zhurenok A.V.
, Markovskaya D.V.
, Gerasimov E.Y.
, Cherepanova S.V.
, Bukhtiyarov A.V.
, Kozlova E.A.
Composite Photocatalysts Based on Cd1-xZnxS and TiO2 for Hydrogen Production under Visible Light: Effect of Platinum co-Catalyst Location
RSC Advances. 2021. V.11. N60. P.37966-37980. DOI: 10.1039/d1ra06845h WOS Scopus РИНЦ AN PMID OpenAlex
Composite Photocatalysts Based on Cd1-xZnxS and TiO2 for Hydrogen Production under Visible Light: Effect of Platinum co-Catalyst Location
RSC Advances. 2021. V.11. N60. P.37966-37980. DOI: 10.1039/d1ra06845h WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Sep 12, 2021 |
| Accepted: | Nov 16, 2021 |
| Published print: | Nov 21, 2021 |
Identifiers:
| Web of science: | WOS:000722349200001 |
| Scopus: | 2-s2.0-85120528931 |
| Elibrary: | 47533898 |
| Chemical Abstracts: | 2021:2602121 |
| PMID: | 35498100 |
| OpenAlex: | W3216909741 |