Hydrogen Peroxide → DL-Arginine Cerium

Participants

Reaction Conditions

Reaction Steps

Into a 600 ml glass beaker containing a magnetic stir bar was introduced 500 ml of high purity (HP) water. A 0.415 gm quantity of DL-arginine was dissolved in this volume, forming an alkaline solution. A 10.0 gm quantity of Ce(NO3)3·6(H2O) was added, dissolved with stirring, resulting in a solution pH of about pH 6. The molar ratio of DL-arginine to cerium ion was 0.1. Base in the form of ammonium hydroxide was added. Then a 10 ml solution containing 1.20 gm of 50% H2O2 (0.75 molar ratio of H2O2 to cerium ion) was added slowly to the cerium and arginine solution mixture. The reaction product was then heated to 40° C. for 1 hour. After cooling, the final product dispersion displayed a high degree of Tyndall scattering when illuminated with a low intensity LASER beam, indicating it contained well-dispersed colloidal particles. Particle size analysis by dynamic light scattering indicated a hydrodynamic diameter of 93.1 nm with a polydispersity of 0.111.

Provenance & Evidence