TY - JOUR

T1 - Ru/CdS Quantum Dots Templated on Clay Nanotubes as Visible-Light-Active Photocatalysts: Optimization of S/Cd Ratio and Ru Content

AU - Stavitskaya, Anna V.

AU - Kozlova, Ekaterina A.

AU - Kurenkova, Anna Yu

AU - Glotov, Aleksandr P.

AU - Selischev, Dmitry S.

AU - Ivanov, Evgenii V.

AU - Kozlov, Denis V.

AU - Vinokurov, Vladimir A.

AU - Fakhrullin, Rawil F.

AU - Lvov, Yuri M.

N1 - Funding Information: This work was supported by the Ministry of Education and Science of the Russian Federation (Grant N. 14.Z50.31.0035). Authors thank Dr. Anna Vutolkina, Dr. A. V. Bukhtiyarov and Dr. I. P. Prosvirin for XPS spectra obtaining and proceeding, Dr. Elvira Rozhina and Dr. Gölnur Fakhrullina for technical help with cell cultures and nematodes. C. elegans nematodes. Publisher Copyright: © 2020 Wiley-VCH GmbH Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/10/9

Y1 - 2020/10/9

N2 - A nanoarchitectural approach based on in situ formation of quantum dots (QDs) within/outside clay nanotubes was developed. Efficient and stable photocatalysts active under visible light were achieved with ruthenium-doped cadmium sulfide QDs templated on the surface of azine-modified halloysite nanotubes. The catalytic activity was tested in the hydrogen evolution reaction in aqueous electrolyte solutions under visible light. Ru doping enhanced the photocatalytic activity of CdS QDs thanks to better light absorption and electron–hole pair separation due to formation of a metal/semiconductor heterojunction. The S/Cd ratio was the major factor for the formation of stable nanoparticles on the surface of the azine-modified clay. A quantum yield of 9.3 % was reached by using Ru/CdS/halloysite containing 5.2 wt % of Cd doped with 0.1 wt % of Ru and an S/Cd ratio of unity. In vivo and in vitro studies on the CdS/halloysite hybrid demonstrated the absence of toxic effects in eukaryotic cells and nematodes in short-term tests, and thus they are promising photosensitive materials for multiple applications.

AB - A nanoarchitectural approach based on in situ formation of quantum dots (QDs) within/outside clay nanotubes was developed. Efficient and stable photocatalysts active under visible light were achieved with ruthenium-doped cadmium sulfide QDs templated on the surface of azine-modified halloysite nanotubes. The catalytic activity was tested in the hydrogen evolution reaction in aqueous electrolyte solutions under visible light. Ru doping enhanced the photocatalytic activity of CdS QDs thanks to better light absorption and electron–hole pair separation due to formation of a metal/semiconductor heterojunction. The S/Cd ratio was the major factor for the formation of stable nanoparticles on the surface of the azine-modified clay. A quantum yield of 9.3 % was reached by using Ru/CdS/halloysite containing 5.2 wt % of Cd doped with 0.1 wt % of Ru and an S/Cd ratio of unity. In vivo and in vitro studies on the CdS/halloysite hybrid demonstrated the absence of toxic effects in eukaryotic cells and nematodes in short-term tests, and thus they are promising photosensitive materials for multiple applications.

KW - cadmium sulfide

KW - clays

KW - nanostructures

KW - photochemistry

KW - quantum dots

UR - http://www.scopus.com/inward/record.url?scp=85091199642&partnerID=8YFLogxK

U2 - 10.1002/chem.202002192

DO - 10.1002/chem.202002192

M3 - Article

C2 - 32640117

AN - SCOPUS:85091199642

VL - 26

SP - 13085

EP - 13092

JO - Chemistry - A European Journal

JF - Chemistry - A European Journal

SN - 0947-6539

IS - 57

ER -