期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 658, 期 -, 页码 684-688出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2015.08.185
关键词
Ag nanoparticles; Chemical reduction; Surface enhanced Raman scattering
资金
- National Natural Science Foundation of China [51172180, 51372200]
- Program for New Century Excellent Talents in University of Ministry of Education of China [NCET-12-1045]
- Science and Technology Plan of Xi'an [CXY1430(9)]
- Shaanxi Program for Outstanding Youth Project
In this paper, Ag nanoparticles (NPs) were prepared by using the citrate and tannic acid combined reduction of silver nitrate at 60 degrees C. Tannic acid is employed as both auxiliary reductant and surface modification agent. The size of Ag NPs can be well under controlled by varying the concentration of tannic acid. The size of Ag NPs decreases from 30 to 10 nm with the decrease of the concentration of tannic acid. The minimum average particle size, 10 nm, could be obtained with the 6 mu M of tannic acid under the reaction condition of 60 degrees C. The products are rod-like, triangle, polygon NPs when the concentration of tannic acid turns to 24 mM. The results show that the obtained Ag NPs at 60 degrees C are smaller than that of boiling. Moreover, the morphology of the obtained Ag NPs is controllable under the condition of 60 degrees C. A SERS experiment was conducted for RhB in the presence of Ag NPs prepared at 60 degrees C, and a clear surface enhanced Raman spectroscopy was recorded. (C) 2015 Elsevier B.V. All rights reserved.
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