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Synthesis of silica-coated ZnO nanocomposite : the resonance structure of polyvinyl pyrrolidone (PVP) as a coupling agent
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posted on 2010-12-01, 00:00 authored by Jinfeng Wang, Takuya Tsuzuki, Bin TangBin Tang, Pavel CizekPavel Cizek, Lu Sun, Xungai WangAbstract The preparation of silica-coated ZnO nanocomposite using polyvinyl pyrrolidone (PVP) as a coupling agent was investigated. Transmission electron microscopy analysis revealed that silica has been deposited on the surface of PVP-capped ZnO nanoparticles as a continuous thin layer. Two-dimensional correlation analysis based on the time-dependent UV–vis spectra was introduced to study the interaction governing the deposition of silica on to PVP-capped ZnO. Strong hydrogen bonds formed between the amphiphilic PVP molecules and silica in the silicacoated PVP-capped ZnO composites. The reduced photocatalytic activity of silica-coated ZnO nanoparticles will enhance their performance as durable, safe, and nonreactive UV blockers in plastics, paints, and coating for outdoor textile and timber products.
History
Journal
Colloid and polymer scienceVolume
288Issue
18Pagination
1705 - 1711Publisher
SpringerLocation
Heidelberg, GermanyPublisher DOI
ISSN
0303-402XeISSN
1435-1536Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2010, Springer-VerlagUsage metrics
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