SOLUTION SPRAY PROCESS FOR PREPARATION OF INORGANIC NANOSIZED PARTICLES USING CO-PRECIPITATION TECHNIQUE IN MICELLAR MODE

摘要

The basis of novel process for synthesis of nanoparticles is to control reaction at molecular level (bottom to top approach) for regulating the particle size. The idea is to contact reactants at highly atomized level through spray and use surfactants at concentration in excess of CMC to prevent the resultant nanoproduct from meeting each other to avoid aggregation. Accordingly, the present invention provides a solution spray process for the preparation of highly dispersed nanoparticles varying from 5 to 80 nm as described herein, said process comprising: 1. Dissolving the precursor and precipitator independently in solvent to form concentrated solutions at specified strength. 2. Mixing the appropriate surfactant either with precursor or precipitator. North Maharashtra University, Jalgaon 3. Spraying these solutions independently and simultaneously in co-precipitation reactor to form the reaction zone in flowing thin film form. 4. Controlling the individual spray to maintain fan pattern in flowing reaction film. 5. Controlling input flow rates and discharge rates for providing specific residence time/ holding time. 6. Filtering the resultant reaction mixture, containing nanosized product, through fine mesh filter. 7. Washing with solvent to remove soluble by-products (Salt) formed during the reaction. 8. Low temperature vacuum drying of nanoparticles to eliminate residual traces of solvent.