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Article Dans Une Revue RSC Advances Année : 2018

Bio-sourced phosphoprotein-based synthesis of silver-doped macroporous zinc phosphates and their antibacterial properties

Résumé

The usual sources of phosphorus for metal phosphates are obtained from phosphate rocks, of which resources are depleted. As a substitute for these mineral sources, an original method of synthesis has been developed to prepare macroporous zinc phosphates using casein phosphoprotein. This bio-sourced reactant plays during the synthesis the roles of both a phosphorus source and a reducing agent for silver nanoparticles. Thus, zinc phosphates loaded with different Ag contents (up to 6.4 wt%) are prepared via hydrothermal treatment at 100 C. Silver nanoparticles co-crystallized with hopeite, Zn 3 (PO 4) 2 and/or Zn 2 P 2 O 7. In addition, casein induces porosity within the zinc phosphate framework and provides macropores (diameter of >50 nm) during calcination. The antibacterial properties against Escherichia coli K12 bacteria of Ag-containing and Ag-free porous zinc phosphates (calcined at 750 C) were also tested for the first time.
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hal-02536844 , version 1 (08-04-2020)

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Jessica Viviana Hinostroza Ramos, Karine Anselme, Angélique Simon-Masseron, Lydie Ploux. Bio-sourced phosphoprotein-based synthesis of silver-doped macroporous zinc phosphates and their antibacterial properties. RSC Advances, 2018, 8 (44), pp.25112-25122. ⟨10.1039/c8ra04438d⟩. ⟨hal-02536844⟩
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