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Influences of chemical composition, microstructure and bandgap energy on photocatalytic and antimicrobial activities of ZnO and Ag-doped ZnO by solution combustion technique |
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| รหัสดีโอไอ | |
| Creator | Kornkamon MEESOMBAD |
| Title | Influences of chemical composition, microstructure and bandgap energy on photocatalytic and antimicrobial activities of ZnO and Ag-doped ZnO by solution combustion technique |
| Contributor | Oratai JOONGPRATEEP, Ratchatee TECHAPIESANCHAROENKIJ, Krissada SUWANTHANAWISES, Patcharaporn SIWAYAPRAHM, Phonphan WATTHANARAT |
| Publisher | Metallurgy and Materials Science Research Institute, Chulalongkorn University |
| Publication Year | 2562 |
| Journal Title | Journal of Metals, Materials and Minerals |
| Journal Vol. | 29 |
| Journal No. | 1 |
| Page no. | 78-85 |
| Keyword | Combustion synthesis, Nanoparticle, Ag doped ZnO, Photocatalytic activity |
| URL Website | http://ojs.materialsconnex.com/index.php/jmmm/index |
| Website title | Journal of Metals, Materials and Minerals |
| ISSN | 08576149;26300508 |
| Abstract | Antibacterial agents, self-cleaning materials, H2 generators and air purifiers areamong common applications of photocatalysts. ZnO is a low cost material withprominent photocatalytic performance. It is generally accepted that enhancement ofphotocatalytic activities of powders can be achieved through doping, particlerefinement, as well as tailoring of bandgap energy. It has been reported that properdoping of zinc oxide by silver lead to reduction of bandgap energy, promotingelectron and hole generation, which results in enhanced photocatalytic performance.The present study aims at synthesizing ZnO and ZnO doped with 2.5, 5, and 10 mol%Ag by solution combustion technique. Influences of chemical composition,microstructure, and bandgap energy on photocatalytic activities were also examined.Compositional analysis revealed an increasing trend of Ag phase formation withgreater doping content. Microstructural examination indicated that all powderscontained fine particles, which agglomerated into non-uniformed clusters withaverage sizes ranging from 99 to 255 nm. Values of optical bandgap ranging from3.40 to 3.22 eV were observed. The greatest and the least amount of photocatalyticdegradation of methylene blue, examined at wavelength closed to 290 nm in 90 min,were found in ZnO with 2.5 mol% Ag and ZnO with 5 mol% Ag, respectively. Theantibacterial activity of the powders revealed the same trend as that of thephotocatalytic degradation. The antibacterial activity of the powders revealed thesame trend as that of the photocatalytic degradation, with the maximumStaphylococcus aureus reduction of 93.88% in ZnO powder with 2.5 mol% Ag. |
