Facile Fabrication of Oxygen-Releasing Tannylated Calcium Peroxide Nanoparticles.

This study reports a new approach for the facile fabrication of calcium peroxide (CaO2) nanoparticles using tannic acid (TA) as the coordinate bridge between calcium ions. Tannylated-CaO2 (TA/CaO2) nanoparticles were prepared by reacting calcium chloride (CaCl2) with hydrogen peroxide (H2O2) in ethanol containing ammonia and different amounts of TA (10, 25, and 50 mg). The prepared TA/CaO2 aggregates consisted of nanoparticles 25-31 nm in size. The nanoparticles prepared using 10 mg of TA in the precursor solution exhibited the highest efficiency for oxygen generation. Moreover, the oxygen generation from TA (10 mg)/CaO2 nanoparticles was higher in an acidic environment.