Department of Physical and Colloid Chemistry, Gubkin University, Moscow, 119991, Russian Federation.
Department of Photocatalysis, Boreskov Institute of Catalysis SB RAS, Novosibirsk, 630090, Russian Federation.
Chemistry. 2020 Oct 9;26(57):13085-13092. doi: 10.1002/chem.202002192. Epub 2020 Sep 21.
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.
基于在粘土纳米管内外原位形成量子点 (QD) 的纳米结构方法，开发了一种方法。在嗪改性埃洛石纳米管表面模板化的钌掺杂硫化镉 QD 的作用下，实现了在可见光下具有高效和稳定光催化活性的光催化剂。在水相电解质溶液中可见光下的析氢反应中测试了催化活性。由于形成金属/半导体异质结，Ru 掺杂增强了 CdS QD 的光催化活性，这得益于更好的光吸收和电子-空穴对分离。在嗪改性粘土表面上形成稳定纳米颗粒的主要因素是 S/Cd 比。在含有 5.2wt%Cd（掺杂 0.1wt%Ru）和 S/Cd 比为 1 的 Ru/CdS/埃洛石中，量子产率达到了 9.3%。CdS/埃洛石杂化材料的体内和体外研究表明，在短期试验中真核细胞和线虫中没有毒性作用，因此它们是用于多种应用的有前途的光敏材料。
