Effect of PVP molecular weight on the formation of Ag nanoparticles on echinoid-like TiO2
- Title
- Effect of PVP molecular weight on the formation of Ag nanoparticles on echinoid-like TiO2
- Author
- 오성근
- Keywords
- Ag nanoparticles; Echinoid-like TiO2; Poly(vinyl pyrrolidone); Alcohol reduction; Photocatalytic activity
- Issue Date
- 2013-04
- Publisher
- Elsevier Science B.V., Amsterdam.
- Citation
- Materials letters, April 2013, 96, P.214-217
- Abstract
- Ag nanoparticles were immobilized on echinoid-like TiO2 particles via an alcohol reduction process with poly(vinyl pyrrolidone) (PVP) of different molecular weights (Mw.). The sizes of Ag nanoparticles prepared by using PVP K15 (Mw.: 10,000) and 1(30 (Mw.: 40,000) were 12-15 nm and 19-31 nm, respectively. On the other hand, Ag nanoparticles were not observed when PVP K12 (Mw.: 3500) was used. The crystal structure of Ag nanoparticles formed on TiO2 was face-centered cubic silver phase and the chemical states of Ag nanoparticles were Ag+ and Ag-0. The photocatalytic performance was enhanced by Ag deposition. Among the samples, the prepared Ag/TiO2 composite by using PVP K15 exhibited better photocatalytic activity than other composites due to its higher Ag coverage on the TiO2 surface. (C) 2013 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0167577X13000669?via%3Dihubhttp://hdl.handle.net/20.500.11754/44123
- ISSN
- 0167-577X
- DOI
- 10.1016/j.matlet.2013.01.045
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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