CdS Quantum Dots in Hierarchical Mesoporous Silica Templated on Clay Nanotubes: Implications for Photocatalytic Hydrogen Production Full article
| Journal |
ACS Applied Nano Materials
ISSN: 2574-0970 |
||||||
|---|---|---|---|---|---|---|---|
| Output data | Year: 2022, Volume: 5, Number: 1, Pages: 605–614 Pages count : 10 DOI: 10.1021/acsanm.1c03393 | ||||||
| Tags | cadmium sulfide; halloysite; hydrogen; mesoporous silica; nanoarchitectonics; photocatalysis | ||||||
| Authors |
|
||||||
| Affiliations |
|
Funding (3)
| 1 | Ministry of Science and Higher Education of the Russian Federation | FSZE-2020-0007 (0768-2020-0007) |
| 2 | Government of the Russian Federation | 14.Z50.31.0035 |
| 3 | Council for Grants of the President of the Russian Federation | МД-79.2020.3 |
Abstract:
A scalable and efficient photocatalyst is a key factor for sustainable hydrogen production. For the first time, clay nanotube-templated mesoporous silica of MCM-41 type was used as an efficient carrier for photocatalytic nanoparticles. 4–5 nm CdS quantum dots (QDs) were synthesized in situ on the surface of this hierarchical aluminosilicate. The influence of the QD composition on the structural, spectral, and photocatalytic properties was investigated. A series of photocatalysts with various QD sizes (3.2–4.8 nm) and band gaps (2.46–2.66 eV) were obtained. Optimization of the CdS and cocatalyst (Ru) concentration resulted in an efficient visible light photocatalyst for hydrogen production. The photocatalytic activity was tested in an aqueous solution of Na2S/Na2SO3 under 30 W 450 nm diode illumination. The hydrogen evolution rate reached 2600 μmol/gcat·h (apparent quantum efficiency of 15%) for the system with 15.0 wt % of CdS doped with 0.2 wt % of Ru, which corresponds to the rate of hydrogen production of 17.1 mmol per hour counting on the active phase. The material demonstrated almost 100% efficiency of the catalytically active phase. It showed better catalytic activity in comparison to MCM-41 due to the hierarchical structure and presence of Al that stimulated electron transfer during the photocatalytic reaction.
Cite:
Stavitskaya A.
, Glotov A.
, Pouresmaeil F.
, Potapenko K.
, Sitmukhanova E.
, Mazurova K.
, Ivanov E.
, Kozlova E.
, Vinokurov V.
, Lvov Y.
CdS Quantum Dots in Hierarchical Mesoporous Silica Templated on Clay Nanotubes: Implications for Photocatalytic Hydrogen Production
ACS Applied Nano Materials. 2022. V.5. N1. P.605–614. DOI: 10.1021/acsanm.1c03393 WOS Scopus РИНЦ AN OpenAlex
CdS Quantum Dots in Hierarchical Mesoporous Silica Templated on Clay Nanotubes: Implications for Photocatalytic Hydrogen Production
ACS Applied Nano Materials. 2022. V.5. N1. P.605–614. DOI: 10.1021/acsanm.1c03393 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Oct 13, 2021 |
| Accepted: | Dec 6, 2021 |
| Published online: | Dec 16, 2021 |
| Published print: | Jan 28, 2022 |
Identifiers:
| Web of science: | WOS:000733823500001 |
| Scopus: | 2-s2.0-85121982920 |
| Elibrary: | 47550456 |
| Chemical Abstracts: | 2021:2753753 |
| OpenAlex: | W4200481209 |