The preparation of Ag/mesoporous silica by direct silver reduction and Ag/functionalized mesoporous silica by in situ formation of adsorbed silver
- Authors
- Park, Jay hyun; Park, Jai koo; Shin, Hee young
- Issue Date
- Jan-2007
- Publisher
- ELSEVIER
- Keywords
- mesoporous material; silver nanoparticles; thiol
- Citation
- MATERIALS LETTERS, v.61, no.1, pp.156 - 159
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS LETTERS
- Volume
- 61
- Number
- 1
- Start Page
- 156
- End Page
- 159
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/180570
- DOI
- 10.1016/j.matlet.2006.04.118
- ISSN
- 0167-577X
- Abstract
- Mesoporous silica (MS) with large pores and thiol functionalized mesoporous silica (TFMS) were synthesized. Si-29 MAS NMR confirmed the functionalization of MPTMS on the surface of mesoporous silica. Silver nanoparticles were prepared by two methods: (1) direct reduction of Ag+ ions with NaBH4 in aqueous AgNO3 solution containing MS, (2) in situ reduction of Ag+ ions adsorbed on TFMS with NaBH4. The characteristics of products from both methods were compared using SAXRD, TEM, and N-2 adsorption-desorption. Ag nanoclusters were mostly confined and dispersed in the channels of the TFMS and their sizes were under 6 nm. However, Ag nanoparticles on the MS formed outside the mesoporous channels rather than within them.
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