Formation And Characteristics Of Nano-Titania Ink

Because of its excellent catalytic and ultraviolet absorption performance,non-toxic,stable chemical properties,nano-TiO₂ are widely used in light catalysis and light electric fields.In actual production,nano-TiO₂ often exists in the form of thin films.However,the preparation of large area,controllable thickness is still a difficult problem.Ink-jet printing has been a great method due to its high utilization rate of the precursor,controllable of the thickness,simple operation.For the preparation of nano-TiO₂ thin film by ink-jet printing,the dispersion of the ink is the most important.This acticle is aimed to prepare nano-TiO₂ ink used for self-cleaning glass and ultraviolet detection device,study the nature and law of decentralized system.The research content is divided into two parts,one is to prepare anatase TiO₂ nanoparticles which is about 10 nm by solvent hot method.This type of TiO₂ has high photocatalytic activity,good electron injection and transmission performance,which is suitable for self-cleaning glass and ultraviolet detection device.This topic has studied the reactant of isopropyl alcohol and distilled water in the influence of the grain size and grain type of nano-TiO₂.The results reflected that isopropyl alcohol and distilled water inhibits the grown-up of the grain.Differrent from distilled water,isopropyl alcohol played a role for promoting the anatase phase.When isopropyl alcohol is 30 ml,distilled water is 10 ml,the right TiO₂ is formed.Next,the dispersion mechanism of nano-TiO₂ has been studied,including the influence of pH and dispersant.The results showed that the isoelectric point of is p H=4.6 in the water.When thepHis the isoelectric point,the dispersion is the most terrible.When p H=9,the dispersion is the best.If 1 g nano-TiO₂ is added into100 ml water,0.002 g sodium hexametaphosphates more is good for diaperation.The absorbance is 0.895,the average particle size of 131.5 nm.