Synthesis of Multiphase Au/Cd0.6Zn0.4S/ZnS Photocatalysts for Improved Photocatalytic Performance Full article
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International Journal of Hydrogen Energy
ISSN: 0360-3199 , E-ISSN: 1879-3487 |
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| Output data | Year: 2019, Volume: 44, Number: 42, Pages: 23589-23599 Pages count : 11 DOI: 10.1016/j.ijhydene.2019.07.081 | ||||
| Tags | Cd1-xZnxS; Photocatalytic hydrogen production; Photoelectrochemical properties; Visible light | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Federal Agency for Scientific Organizations | 0303-2016-0016 |
Abstract:
Novel composite photocatalysts consisting of a cadmium and zinc sulfide solid solution (Cd0.6Zn0.4S) and zinc sulfide (ZnS) nanoparticles were successfully prepared by a simple hydrothermal treatment of suspended Cd0.3Zn0.7S at 120 °C. The as-obtained materials were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and UV-VIS diffuse reflection spectroscopy. The obtained photocatalysts were tested in the photocatalytic evolution of hydrogen from a Na2S/Na2SO3 aqueous solution under visible light irradiation (λ = 450 nm). It is shown that the hydrothermal treatment of Cd0.3Zn0.7S at 120 °C increases the activity by a factor of 7.5 due to the phase transformations of the solid solution with the formation of the multiphase Cd0.6Zn0.4S/ZnS sample. The deposition of gold on the surface of Cd0.6Zn0.4S/ZnS leads to a further increase in activity: the achieved photocatalytic activity and quantum efficiency (450 nm) for 1%Au/Cd0.6Zn0.4S/ZnS are 17.4 mmol g−1 h−1 and 42.6%, respectively. This excellent performance is found to be attributable to the transformation of Cd1-xZnxS from the cubic to the hexagonal phase during the hydrothermal treatment. Additionally, photoelectrodes based on Cd0.6Zn0.4S/ZnS and FTO were synthesized and tested in a two-electrode cell. A high value of the photocurrent equal to 0.5 mA/cm2 is achieved for the Cd0.6Zn0.4S/ZnS/FTO electrode. An investigation by means of impedance spectroscopy reveals the longer lifetime of photogenerated charge carriers in the Cd0.6Zn0.4S/ZnS/FTO photoelectrode if to compare with Cd0.3Zn0.7S/FTO system. © 2019 Hydrogen Energy Publications LLC
Cite:
Kozlova E.A.
, Gribov E.N.
, Kurenkova A.Y.
, Cherepanova S.V.
, Gerasimov E.Y.
, Kozlov D.V.
Synthesis of Multiphase Au/Cd0.6Zn0.4S/ZnS Photocatalysts for Improved Photocatalytic Performance
International Journal of Hydrogen Energy. 2019. V.44. N42. P.23589-23599. DOI: 10.1016/j.ijhydene.2019.07.081 WOS Scopus РИНЦ AN OpenAlex
Synthesis of Multiphase Au/Cd0.6Zn0.4S/ZnS Photocatalysts for Improved Photocatalytic Performance
International Journal of Hydrogen Energy. 2019. V.44. N42. P.23589-23599. DOI: 10.1016/j.ijhydene.2019.07.081 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Mar 13, 2019 |
| Accepted: | Jul 9, 2019 |
| Published online: | Aug 8, 2019 |
| Published print: | Sep 1, 2019 |
Identifiers:
| Web of science: | WOS:000486096400006 |
| Scopus: | 2-s2.0-85070230039 |
| Elibrary: | 41625110 |
| Chemical Abstracts: | 2019:1503215 |
| OpenAlex: | W2964879760 |