Abstract
Nanoparticle synthesis in supercritical water (around 374oC and 22MPa) was extensively investigated because good crystallization of products can be obtained in high efficacy. Corrosion of reactor materials and aggregation of nanoparticles in supercritical water, however, were often found as main problems. Using mixtures of water and organic solvents significantly decreased the critical temperature (Tc) and pressure (Pc) of the medium to as low as about 550-650 K and 7-20 MPa, respectively. The effects on preparing BaTiO3 nanoparticles in supercritical state of mixing solvents were discussed.
