Magnetically modified nanogold-biosilica composite as an effective catalyst for CO oxidation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F19%3A00510770" target="_blank" >RIV/60077344:_____/19:00510770 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/19:73597937 RIV/61989100:27640/19:10239873 RIV/61989100:27710/19:10239873
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1878535218302521?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1878535218302521?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.arabjc.2018.12.002" target="_blank" >10.1016/j.arabjc.2018.12.002</a>

Result language
angličtina
Original language name
Magnetically modified nanogold-biosilica composite as an effective catalyst for CO oxidation
Original language description
The temperature-dependent biosynthesis of gold nanoparticles (AuNP) using diatom cells of Diadesmis gallica was successfully performed. The resulting biosynthesis product was a bionanocomposite containing AuNP (app. 20 nm) subsequently anchored on the silica surface of diatomaceous frustules. As-prepared nanogold-biosilica composite was tested as catalyst in the oxidation of carbon monoxide using gas chromatograph with thermal conductivity detector. For catalytic activity enhancement, bionanocomposite was magnetically modified by ferrofluid using two different methods, i.e., with and without the use of methanol. The oxidation of CO at 300 °C was 58–60% in the presence of nanogold-biosilica composites. CO conversion at 300 °C was only 15% over magnetically responsive sample modified in the presence of methanol. On the other hand, complete CO conversion was reached over direct (without methanol) magnetically modified nanogold-biosilica composite at 330 °C (GHSV = 60 l g−1 h−1). Our results show, that the type of magnetic modification can influence the catalytic activity of bionanocomposite. The best catalytic effect in CO conversion established direct magnetically modified nanogold-biosilica composite.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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