Abstract
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 silica-coated PVP-capped ZnO composites. The reduced photocatalytic activity of silica-coated ZnO nanoparticles will enhance their performance as durable, safe, and non-reactive UV blockers in plastics, paints, and coating for outdoor textile and timber products.
Original language | English |
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Pages (from-to) | 1705-1711 |
Number of pages | 7 |
Journal | Colloid and Polymer Science |
Volume | 288 |
Issue number | 18 |
DOIs | |
Publication status | Published - Dec 2010 |
Externally published | Yes |