Title Effect of silver on the phase transition and wettability of titanium oxide films
Authors Mosquera, Adolfo A. , Albella, Jose M. , Navarro, Violeta , Bhattacharyya, Debabrata , ENDRINO ARMENTEROS, JOSÉ LUIS
External publication Si
Means Sci. Rep.
Scope Article
Nature Científica
JCR Quartile 1
SJR Quartile 1
JCR Impact 4.25900
SJR Impact 1.69200
Web https://www.scopus.com/inward/record.uri?eid=2-s2.0-84984796671&doi=10.1038%2fsrep32171&partnerID=40&md5=d3db85667478e7e340f41cc22588c647
Publication date 30/08/2016
ISI 000382156200001
Scopus Id 2-s2.0-84984796671
DOI 10.1038/srep32171
Abstract The effect of silver on the phase transition and microstructure of titanium oxide films grown by pulsed cathodic arc had been investigated by XRD, SEM and Raman spectroscopy. Following successive thermal annealing up to 1000 degrees C, microstructural analysis of annealed Ag-TiO2 films reveals that the incorporation of Ag nanoparticles strongly affects the transition temperature from the initial metastable amorphous phase to anatase and stable rutile phase. An increase of silver content into TiO2 matrix inhibits the amorphous to anatase phase transition, raising its temperature boundary and, simultaneously reduces the transition temperature to promote rutile structure at lower value of 600 degrees C. The results are interpreted in terms of the steric effects produced by agglomeration of Ag atoms into larger clusters following annealing which hinders diffusion of Ti and O ions for anatase formation and constrains the volume available for the anatase lattice, thus disrupting its structure to form rutile phase. The effect of silver on the optical and wetting properties of TiO2 was evaluated to demonstrate its improved photocatalytic performance.
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