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

Result code in 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>

Alternative codes found

RIV/61388980:_____/09:00340426

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JI - Composite materials

OECD FORD branch

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Project

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Continuities

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

Publication year

2009

Confidentiality

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

Name of the periodical

Journal of the Brazilian Chemical Society

ISSN

0103-5053

e-ISSN

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Volume of the periodical

20

Issue of the periodical within the volume

7

Country of publishing house

BR - BRAZIL

Number of pages

7

Pages from-to

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UT code for WoS article

000269440000021

EID of the result in the Scopus database

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