|
|||||
|
|
The preparation of zinc silicate/ZnO particles and their use as an efficient UV absorber |
|
| Authors: | Peter Podbrš?ek Goran Dra?i? Alojz An?lovar Zorica Crnjak Orel |
| Affiliation: | aNational Institute of Chemistry, Hajdrihova 19, SI 1000 Ljubljana, Slovenia;bDepartment for Nanostructured Materials, Jo?ef Stefan Institute, Jamova 39, SI 1000 Ljubljana, Slovenia;cCenter of Excellence for Polymer Materials and Technologies, Tehnološki Park 24, 1000 Ljubljana, Slovenia |
| Abstract: | The formation of zinc silicate/ZnO particles synthesized by a two-step method and their incorporation into PMMA is presented. In the first step a segmented-flow tubular reactor was used for the continuous room-temperature preparation of a zinc silicate/Zn(OH)2 gel that was thermally treated after rinsing and drying in the second step. The same preparation procedure was also employed for the synthesis of pure ZnO and pure zinc silicate particles. It was found that the presence of the zinc silicate phase significantly influenced the final particle size, decreased the degree of crystallization and reduced the particles’ UV absorption capabilities. The reduced photocatalytic activity of the zinc silicate/ZnO particles indicated that the majority of ZnO crystallites were formed inside the zinc silicate matrix. The nanocomposite prepared from zinc silicate/ZnO particles (0.04 wt.%) and PMMA showed high UV shielding and at the same time sufficient transmittance in the visible-light region. |
| Keywords: | A Oxides B Sol&ndash gel chemistry D Optical properties D Surface properties |
| 本文献已被 ScienceDirect 等数据库收录！ | |