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Silver-doped hydroxyapatite (Ag-HA) porous microspheres were synthesized by one-step hydrothermal route at 180 • C for 10 h in the presence of L-glutamic acid (Glu) as a growth regulator. The effects of Glu concentration and silver ion doping on the phase and morphology of the products were thoroughly characterized by X-ray diffraction and scanning electron microscopy. Results show that the presence of Glu induces the growth of hydroxyapatite crystals from flower-like aggregates to porous microspheres, and the addition of silver ions can maintain the roundness of hydroxyapatite microspheres. The Brunauer-Emmett-Teller analysis, particle dispersity and antibacterial property were also conducted. The optimal parameters for porous silver-doped hydroxyapatite microspheres with uniform morphology was obtained with the atomic molar ratio n(Ag)/n[Ag + Ca] = 0.01 and Glu concentration at 0.06 M.

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