On the Nature of Citrate-Derived Surface Species on Ag Nanoparticles: Insights from X-Ray Photoelectron Spectroscopy | Sciact - CRIS-system of Boreskov Institute of Catalysis

On the Nature of Citrate-Derived Surface Species on Ag Nanoparticles: Insights from X-Ray Photoelectron Spectroscopy Full article

Journal

Applied Surface Science
ISSN: 0169-4332

Output data

Year: 2018, Volume: 427, Number: Part B, Pages: 687-694 Pages count : 8 DOI: 10.1016/j.apsusc.2017.09.026

Tags

Adsorption, Citrate capping, Silver nanoparticles, X-ray photoelectron spectroscopy

Authors

Mikhlin Yuri L. ¹ , Vorobyev Sergey A. ¹ , Saikova Svetlana V. ² , Vishnyakova Elena A. ^1,3 , Romanchenko Alexander S. ¹ , Zharkov Sergey M. ^2,4 , Larichev Yurii V. ⁵

Affiliations

1	Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/24, Krasnoyarsk, 60036,Russia
2	Siberian Federal University, Svobodny av. 79, Krasnoyarsk, 660041, Russia
3	Department of Chemistry and The Smalley-Curl Institute, Rice University, 6100 Main Street, Houston, 77005, USA
4	Kirensky Institute of Physics of the Siberian Branch of the Russian Academy of Sciences, Akademgorodok 50/38, Krasnoyarsk, 660036, Russia
5	Boreskov Institute of Catalysis of the Siberian Branch of the Russian Academy of Sciences, Lavrent’ev av. 5, Novosibirsk, 630090, Russia

Citrate is an important stabilizing, reducing, and complexing reagent in the wet chemical synthesis of nanoparticles of silver and other metals, however, the exact nature of adsorbates, and its mechanism of action are still uncertain. Here, we applied X-ray photoelectron spectroscopy, soft X-ray absorption near-edge spectroscopy, and other techniques in order to determine the surface composition and to specify the citrate-related species at Ag nanoparticles immobilized from the dense hydrosol prepared using room-temperature reduction of aqueous Ag+ ions with ferrous ions and citrate as stabilizer (Carey Lea method). It was found that, contrary to the common view, the species adsorbed on the Ag nanoparticles are, in large part, products of citrate decomposition comprising an alcohol group and one or two carboxylate bound to the surface Ag, and minor unbound carboxylate group; these may also be mixtures of citrate with lower molecular weight anions. No ketone groups were specified, and very minor surface Ag(I) and Fe (mainly, ferric oxyhydroxides) species were detected. Moreover, the adsorbates were different at AgNPs having various size and shape. The relation between the capping and the particle growth, colloidal stability of the high-concentration sol and properties of AgNPs is briefly considered.

Mikhlin Y.L. , Vorobyev S.A. , Saikova S.V. , Vishnyakova E.A. , Romanchenko A.S. , Zharkov S.M. , Larichev Y.V.
On the Nature of Citrate-Derived Surface Species on Ag Nanoparticles: Insights from X-Ray Photoelectron Spectroscopy

Applied Surface Science. 2018. V.427. NPart B. P.687-694. DOI: 10.1016/j.apsusc.2017.09.026 WOS Scopus РИНЦ AN OpenAlex

Full text from publisher

Submitted:	Jun 19, 2017
Accepted:	Sep 5, 2017
Published online:	Sep 7, 2017
Published print:	Jan 1, 2018

Web of science:	WOS:000415219100087
Scopus:	2-s2.0-85029396203
Elibrary:	31052063
Chemical Abstracts:	2017:1520284
OpenAlex:	W2751174369

DB	Citing
Web of science	22
Scopus	26
Elibrary	23
OpenAlex	30