Modified photodeposition of uniform Ag nanoparticles on TiO2 with superior catalytic and antibacterial activities View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2015-08

AUTHORS

Jianqi Ma, Shaobo Guo, Xiaohua Guo, Hongguang Ge

ABSTRACT

Photocatalytic reduction is a facile and effective route to deposit Ag nanoparticles (NPs) on TiO2. Nevertheless, it is difficult to produce Ag NPs that have small particle size and uniform distribution on TiO2 to form core–shell structure TiO2@Ag composites by straightforward photodeposition. In this study, monodisperse TiO2 spheres composed of anatase nanocrystals were directly employed as templates to deposit small and homogeneously dispersed Ag NPs by modified photodeposition procedure. To prove the feasibility of the innovative method, we evaluated the catalytic performance and bactericidal efficacy of the as-prepared samples based on the characterizations, since there is strong dependence between size and dispersion of Ag NPs and catalytic performance and inhibition of bacterial growth, where smaller and more highly dispersed Ag NPs displayed better antimicrobial and catalytic properties. The results indicate that the modified photodeposition route can effectively prevent TiO2 spheres themselves from aggregating and Ag NPs from rapid overgrowing on the TiO2 surface in the deposition process. The superior bactericidal and catalytic properties of the TiO2@Ag composites are largely attributed to the small and highly dispersed Ag NPs on TiO2 spheres. More... »

PAGES

366-373

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10971-015-3709-1

DOI

http://dx.doi.org/10.1007/s10971-015-3709-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1025587087


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