期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 126, 期 3, 页码 993-997出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2010.09.069
关键词
Metals; Nanostructures; Chemical techniques; Chemisorption
资金
- National Science Council of the Republic of China
- Vanung University
We report here a new pathway to prepare chitosan (Ch)-capped silver nanoparticles (NPs) in aqueous solutions without addition of any stabilizer and reductant. First, 1 g L(-1) Ch was added in a 0.05 N AgNO(3) aqueous solution with pH 6.6. Then the solution was heated from room temperature to boiling at a heating rate of 6 degrees C min(-1) to prepare Ch/Ag nanocomposites (NCs). The particle size of prepared Ag NPs with main (1 1 1) face on Ch is ca. 10 nm. Encouragingly, the prepared Ch/Ag NCs are more active catalysts than Ch is for the decomposition of 2 ppm formaldehyde in a dark and sealed chamber. After testing for 24h, the formaldehyde molecules were decomposed by ca. 96% and 65% via employing Ch/Ag NCs and Ch, respectively. (c) 2010 Elsevier B.V. All rights reserved.
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