Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light

Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light

Two types of photocatalysts, 1%Pt/Cd<sub>1−x</sub>Zn<sub>x</sub>S/g-C<sub>3</sub>N<sub>4</sub> (x = 0.2–0.3) and Cd<sub>1−x</sub>Zn<sub>x</sub>S/1%Pt/g-C<sub>3</sub>N<sub>4</sub> (x = 0.2–0.3), were synth...

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Autores principales: Angelina V. Zhurenok, Dina V. Markovskaya, Evgeny Y. Gerasimov, Alexander S. Vokhmintsev, Ilya A. Weinstein, Igor P. Prosvirin, Svetlana V. Cherepanova, Andrey V. Bukhtiyarov, Ekaterina A. Kozlova
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
solar energy
photocatalytic hydrogen evolution
visible light
g-C<sub>3</sub>N<sub>4</sub>
Chemical technology
TP1-1185
Chemistry
QD1-999
Acceso en línea:https://doaj.org/article/e5630562f93e48c6a93e845a052cb972
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spelling oai:doaj.org-article:e5630562f93e48c6a93e845a052cb9722021-11-25T17:06:05ZConstructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light10.3390/catal111113402073-4344https://doaj.org/article/e5630562f93e48c6a93e845a052cb9722021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1340https://doaj.org/toc/2073-4344Two types of photocatalysts, 1%Pt/Cd<sub>1−x</sub>Zn<sub>x</sub>S/g-C<sub>3</sub>N<sub>4</sub> (x = 0.2–0.3) and Cd<sub>1−x</sub>Zn<sub>x</sub>S/1%Pt/g-C<sub>3</sub>N<sub>4</sub> (x = 0.2–0.3), were synthesized by varying the deposition order of platinum, and a solid solution of cadmium and zinc sulfides onto the surface of g-C<sub>3</sub>N<sub>4</sub>. The characterization of photocatalysts showed that, for 1%Pt/Cd<sub>1−x</sub>Zn<sub>x</sub>S/g-C<sub>3</sub>N<sub>4</sub>, small platinum particles were deposited onto a solid solution of cadmium and zinc sulfides; in the case of Cd<sub>1−x</sub>Zn<sub>x</sub>S/1%Pt/g-C<sub>3</sub>N<sub>4</sub>, enlarged platinum clusters were located on the surface of graphitic carbon nitride. Based on the structure of the photocatalysts, we assumed that, in the first case, type II heterojunctions and, in the latter case, S-scheme heterojunctions were realized. The activity of the synthesized samples was tested in hydrogen evolution from triethanolamine (TEOA) basic solution under visible light (λ = 450 nm). A remarkable increase in hydrogen evolution rate compared to single-phase platinized 1%Pt/Cd<sub>1−x</sub>Zn<sub>x</sub>S photocatalysts was observed only in the case of ternary photocatalysts with platinum located on the g-C<sub>3</sub>N<sub>4</sub> surface, Cd<sub>1−x</sub>Zn<sub>x</sub>S/1%Pt/g-C<sub>3</sub>N<sub>4</sub>. Thus, we proved using kinetic experiments and characterization techniques that, for composite photocatalysts based on Cd<sub>1−x</sub>Zn<sub>x</sub>S and g-C<sub>3</sub>N<sub>4</sub>, the formation of the S-scheme mechanism is more favorable than that for type II heterojunction. The highest activity, 2.5 mmol H<sub>2</sub> g<sup>−1</sup> h<sup>−1</sup>, with an apparent quantum efficiency equal to 6.0% at a wavelength of 450 nm was achieved by sample 20% Cd<sub>0.8</sub>Zn<sub>0.2</sub>S/1% Pt/g-C<sub>3</sub>N<sub>4</sub>.Angelina V. ZhurenokDina V. MarkovskayaEvgeny Y. GerasimovAlexander S. VokhmintsevIlya A. WeinsteinIgor P. ProsvirinSvetlana V. CherepanovaAndrey V. BukhtiyarovEkaterina A. KozlovaMDPI AGarticlesolar energyphotocatalytic hydrogen evolutionvisible lightg-C<sub>3</sub>N<sub>4</sub>Chemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1340, p 1340 (2021)
institution DOAJ
collection DOAJ
language EN
topic solar energy
photocatalytic hydrogen evolution
visible light
g-C<sub>3</sub>N<sub>4</sub>
Chemical technology
TP1-1185
Chemistry
QD1-999
spellingShingle solar energy
photocatalytic hydrogen evolution
visible light
g-C<sub>3</sub>N<sub>4</sub>
Chemical technology
TP1-1185
Chemistry
QD1-999
Angelina V. Zhurenok
Dina V. Markovskaya
Evgeny Y. Gerasimov
Alexander S. Vokhmintsev
Ilya A. Weinstein
Igor P. Prosvirin
Svetlana V. Cherepanova
Andrey V. Bukhtiyarov
Ekaterina A. Kozlova
Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light
description Two types of photocatalysts, 1%Pt/Cd<sub>1−x</sub>Zn<sub>x</sub>S/g-C<sub>3</sub>N<sub>4</sub> (x = 0.2–0.3) and Cd<sub>1−x</sub>Zn<sub>x</sub>S/1%Pt/g-C<sub>3</sub>N<sub>4</sub> (x = 0.2–0.3), were synthesized by varying the deposition order of platinum, and a solid solution of cadmium and zinc sulfides onto the surface of g-C<sub>3</sub>N<sub>4</sub>. The characterization of photocatalysts showed that, for 1%Pt/Cd<sub>1−x</sub>Zn<sub>x</sub>S/g-C<sub>3</sub>N<sub>4</sub>, small platinum particles were deposited onto a solid solution of cadmium and zinc sulfides; in the case of Cd<sub>1−x</sub>Zn<sub>x</sub>S/1%Pt/g-C<sub>3</sub>N<sub>4</sub>, enlarged platinum clusters were located on the surface of graphitic carbon nitride. Based on the structure of the photocatalysts, we assumed that, in the first case, type II heterojunctions and, in the latter case, S-scheme heterojunctions were realized. The activity of the synthesized samples was tested in hydrogen evolution from triethanolamine (TEOA) basic solution under visible light (λ = 450 nm). A remarkable increase in hydrogen evolution rate compared to single-phase platinized 1%Pt/Cd<sub>1−x</sub>Zn<sub>x</sub>S photocatalysts was observed only in the case of ternary photocatalysts with platinum located on the g-C<sub>3</sub>N<sub>4</sub> surface, Cd<sub>1−x</sub>Zn<sub>x</sub>S/1%Pt/g-C<sub>3</sub>N<sub>4</sub>. Thus, we proved using kinetic experiments and characterization techniques that, for composite photocatalysts based on Cd<sub>1−x</sub>Zn<sub>x</sub>S and g-C<sub>3</sub>N<sub>4</sub>, the formation of the S-scheme mechanism is more favorable than that for type II heterojunction. The highest activity, 2.5 mmol H<sub>2</sub> g<sup>−1</sup> h<sup>−1</sup>, with an apparent quantum efficiency equal to 6.0% at a wavelength of 450 nm was achieved by sample 20% Cd<sub>0.8</sub>Zn<sub>0.2</sub>S/1% Pt/g-C<sub>3</sub>N<sub>4</sub>.
format article
author Angelina V. Zhurenok
Dina V. Markovskaya
Evgeny Y. Gerasimov
Alexander S. Vokhmintsev
Ilya A. Weinstein
Igor P. Prosvirin
Svetlana V. Cherepanova
Andrey V. Bukhtiyarov
Ekaterina A. Kozlova
author_facet Angelina V. Zhurenok
Dina V. Markovskaya
Evgeny Y. Gerasimov
Alexander S. Vokhmintsev
Ilya A. Weinstein
Igor P. Prosvirin
Svetlana V. Cherepanova
Andrey V. Bukhtiyarov
Ekaterina A. Kozlova
author_sort Angelina V. Zhurenok
title Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light
title_short Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light
title_full Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light
title_fullStr Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light
title_full_unstemmed Constructing g-C<sub>3</sub>N<sub>4</sub>/Cd<sub>1−x</sub>Zn<sub>x</sub>S-Based Heterostructures for Efficient Hydrogen Production under Visible Light
title_sort constructing g-c<sub>3</sub>n<sub>4</sub>/cd<sub>1−x</sub>zn<sub>x</sub>s-based heterostructures for efficient hydrogen production under visible light
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/e5630562f93e48c6a93e845a052cb972
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