On the Nature of Citrate-Derived Surface Species on Ag Nanoparticles: Insights from X-Ray Photoelectron Spectroscopy | Sciact - CRIS-система Института катализа

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

Журнал

Applied Surface Science
ISSN: 0169-4332

Вых. Данные

Год: 2018, Том: 427, Номер: Part B, Страницы: 687-694 Страниц : 8 DOI: 10.1016/j.apsusc.2017.09.026

Ключевые слова

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

Авторы

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

Организации

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 CAPlus OpenAlex

Полный текст от издателя

Поступила в редакцию:	19 июн. 2017 г.
Принята к публикации:	5 сент. 2017 г.
Опубликована online:	7 сент. 2017 г.
Опубликована в печати:	1 янв. 2018 г.

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

БД	Цитирований
Web of science	24
Scopus	28
РИНЦ	24
OpenAlex	33