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Issue 7, 2013
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Low temperature synthesis and SERS application of silver molybdenum oxides

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Abstract

AgxMoyOz (Ag/α-MoO3, Ag/h-MoO3, Ag/β-MoO3, Ag2Mo2O7, and Ag2MoO4) nanomaterials are synthesized at relatively low temperature (80 °C) and with a short hydrothermal treatment time (3 h) using glucose (Glc) as a catalyst. Contrary to previous studies, it is possible to synthesize one of the AgxMoyOz binaries at 80 °C by altering the pH of the reaction media in the presence of glucose. In addition, further experiments indicate that Ag/h-MoO3, Ag2Mo2O7 and Ag/β-MoO3 can be converted to Ag/α-MoO3 which can also be synthesized from a reaction involving ammonium heptamolybdate tetrahydrate and AgNO3 at room temperature using cysteamine in both methods. Characterization with UV-Vis, XRD and Raman spectroscopy reveals high purity of as-synthesized product. These synthesized products are finally used to fabricate SERS substrates by coating a silicon wafer with a mixture of silver nanoparticles (Ag NPs) and AgxMoyOz (Si@Ag/AgxMoyOz). The results show a good sensitivity and stability. In addition, it is also found that the SERS activity of Si@Ag/AgxMoyOz is higher than that of Si@Ag.

Graphical abstract: Low temperature synthesis and SERS application of silver molybdenum oxides

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Publication details

The article was received on 07 Nov 2012, accepted on 17 Dec 2012 and first published on 17 Dec 2012


Article type: Paper
DOI: 10.1039/C2TA01018F
Citation: J. Mater. Chem. A, 2013,1, 2558-2566
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    Low temperature synthesis and SERS application of silver molybdenum oxides

    E. K. Fodjo, D. Li, N. P. Marius, T. Albert and Y. Long, J. Mater. Chem. A, 2013, 1, 2558
    DOI: 10.1039/C2TA01018F

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