Preparation and Characterization of ZnO Nanoparticles Supported on Amorphous SiO2

• Published in: Nanomaterials (Basel, Switzerland) Vol. 7; no. 8; p. 217
• Main Authors: Chen, Ying, Ding, Hao, Sun, Sijia
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 10-08-2017; MDPI
• Subjects: amorphous SiO2; antibacterial; Dehydration; Hydrogen bonds; Hydroxyl groups; load; Minimum inhibitory concentration; monodisperse; Nanoparticles; Particle size; Silica; Silicon dioxide; Zinc oxide; Zinc oxides; ZnO nanoparticle
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano7080217

In order to reduce the primary particle size of zinc oxide (ZnO) and eliminate the agglomeration phenomenon to form a monodisperse state, Zn2+ was loaded on the surface of amorphous silica (SiO2) by the hydrogen bond association between hydroxyl groups in the hydrothermal process. After calcining the precursors, dehydration condensation among hydroxyl groups occurred and ZnO nanoparticles supported on amorphous SiO2 (ZnO-SiO2) were prepared. Furthermore, the SEM and TEM observations showed that ZnO nanoparticles with a particle size of 3-8 nm were uniformly and dispersedly loaded on the surface of amorphous SiO2. Compared with pure ZnO, ZnO-SiO2 showed a much better antibacterial performance in the minimum inhibitory concentration (MIC) test and the antibacterial properties of the paint adding ZnO-SiO2 composite.