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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/61989592:15310/19:73597937 RIV/61989100:27640/19:10239873 RIV/61989100:27710/19:10239873

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Arabian Journal of Chemistry

ISSN

1878-5352

e-ISSN

—

Svazek periodika

12

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

SA - Království Saúdská Arábie

Počet stran výsledku

11

Strana od-do

1148-1158

Kód UT WoS článku

000494954400022

EID výsledku v databázi Scopus

2-s2.0-85058363232