Preparation of silver-montmorillonite nanocomposites by reduction with formaldehyde and borohydride

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F09%3A00022000" target="_blank" >RIV/61989100:27360/09:00022000 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/09:00340426

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Preparation of silver-montmorillonite nanocomposites by reduction with formaldehyde and borohydride

Popis výsledku v původním jazyce

Na-rich montmorillonite (MMT) was intercalated with silver cations, which were subsequently reduced with formaldehyde or sodium borohydride. Silver-montmorillonite nanocomposites were studied by UV-VIS spectrometry, transmission electron microscopy (TEM)and X-ray diffraction (XRD). Influence of the different reducing agents on dispersity and size of silver particles deposited on montmorillonite surface was investigated. The reduction with borohydride gives rise to uniformly dispersed silver particles with a narrow particle size distribution from 3 nm to 13 nm. Formaldehyde reduction forms unevenly dispersed particles with a much wider size distribution ranging from 3 nm to 100 nm. In addition, among silver particles prepared by formaldehyde some Ag2Oparticles were found likely as a result of the incomplete reduction. Silver-montmorillonite composites prepared by borohydride and formaldehyde contain 2.4 wt% and 5.3 wt% of Ag, respectively.

Název v anglickém jazyce

Preparation of silver-montmorillonite nanocomposites by reduction with formaldehyde and borohydride

Popis výsledku anglicky

Na-rich montmorillonite (MMT) was intercalated with silver cations, which were subsequently reduced with formaldehyde or sodium borohydride. Silver-montmorillonite nanocomposites were studied by UV-VIS spectrometry, transmission electron microscopy (TEM)and X-ray diffraction (XRD). Influence of the different reducing agents on dispersity and size of silver particles deposited on montmorillonite surface was investigated. The reduction with borohydride gives rise to uniformly dispersed silver particles with a narrow particle size distribution from 3 nm to 13 nm. Formaldehyde reduction forms unevenly dispersed particles with a much wider size distribution ranging from 3 nm to 100 nm. In addition, among silver particles prepared by formaldehyde some Ag2Oparticles were found likely as a result of the incomplete reduction. Silver-montmorillonite composites prepared by borohydride and formaldehyde contain 2.4 wt% and 5.3 wt% of Ag, respectively.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JI - Kompositní materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2009

Kód důvěrnosti údajů

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

Název periodika

Journal of the Brazilian Chemical Society

ISSN

0103-5053

e-ISSN

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Svazek periodika

20

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

BR - Brazilská federativní republika

Počet stran výsledku

7

Strana od-do

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Kód UT WoS článku

000269440000021

EID výsledku v databázi Scopus

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