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Polymer Precursors Effect in the Macromolecular Metal-Polymer on the Rh/RhO2/Rh2O3 Phase Using Solvent-Less Synthesis and Its Photocatalytic Activity

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Abstract

A mixture of a nanostructured Rh/RhO2 phase was easily obtained by thermally treating the macromolecular Chitosan·(RhCl3)x precursor, while the Rh/Rh2O3 phase was obtained by pyrolyzing PSP-4-PVP·(RhCl3)x, precursors. The nature of the polymeric precursor acting as a solid-state template does not significantly influence the “foam-like” morphology of the Rh/RhO2 and Rh/Rh2O3 nanoparticles. The size of the obtained products is within the range of 16 nm, as confirmed by HRTEM. A possible formation of the Rh/RhO2 and Rh/Rh2O3 nanoparticles is proposed. The bandgap values estimated from Tauc plots are 3.7 eV, and 3.0 eV for Rh/RhO2 and Rh2O3, respectively. Their photocatalytic activity was measured, for the first time, using a methylene blue pollutant, achieving a photodegradation of 78% for Rh/RhO2 and 70% for Rh/Rh2O3 in 300 min.

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Acknowledgements

The authors acknowledge Fondecyt Project 1160241 for financial support. This research also received funding from Consejo Superior de Investigaciones Científicas, Spain, under Grant I-COOP LIGHT 2015CD0013. The use of Servicio General de Apoyo a las Investigación (SAI, University of Zaragoza) is also acknowledged.

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Authors and Affiliations

  1. Departamento de Química, Facultad de Química, Universidad de Chile, La Palmeras 3425, Nuñoa, Casilla 653, Santiago de Chile, Chile

    C. Diaz & M. Segovia

  2. Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Llano Subercaseaux 2801, San Miguel, Santiago de Chile, Chile

    M. L. Valenzuela

  3. Facultad de Ciencias Exactas, Universidad Andrés Bello, Concepción, Autopista Concepción-Talcahuano 7100, Talcahuano, Chile

    O. Cifuentes-Vaca

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  1. C. Diaz
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  2. M. L. Valenzuela
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Correspondence to C. Diaz or M. L. Valenzuela.

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Diaz, C., Valenzuela, M.L., Cifuentes-Vaca, O. et al. Polymer Precursors Effect in the Macromolecular Metal-Polymer on the Rh/RhO2/Rh2O3 Phase Using Solvent-Less Synthesis and Its Photocatalytic Activity. J Inorg Organomet Polym 30, 4702–4708 (2020). https://doi.org/10.1007/s10904-020-01634-2

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