Preparation of Nano-Size PbTiO_3 Particles and Its Characteristics on the Adsorption of Organic Acids

摘要

The nano-size PbTiO_3 particles were prepared by sol-gel method and the effects of processing variables such as concentration of sol solution, catalyst, concentration of catalyst, calcination temperature and calcination process on particle size of PbTiO_3 were analyzed. The condition for preparation of sol solution from the precursor is very critical to the size of PbTiO_3 particle. At certain experimental conditions, the particles of 129nm, 213nm and 343nm were obtained. However, the particle size of commercialized PbTiO_3 powder was 5μm(5,000nm). The prepared nano-size PbTiO_3 powder adsorbed more acetic acid and formic acid than the commercialized one; 1.5 times for acetic acid and 1.2 times for formic acid. Formic acid was preferentially adsorbed than acetic acid.