Abstract
In recent years, pollution control and management have become a major issue that to be resolved. Among the many environmental control technology, the technology of useing sunlight as a light activated Nano TiO2 for decomposition of organic pollutants at room temperature has become an ideal environment management technology, more and more widely used in people's daily life.
Sol - gel method is a new method developed in the 1960s to make ceramics, glass, fiber and bulk solids, films and other inorganic materials , the basic principle of the preparation of Nano-TiO2 is putting the metal alkoxides organic or inorganic salt in medium for hydrolysis, polycondensation reaction gel, then get the materials requiredgel by aging, drying, calcining the gel. The method is chemical uniform, and high pure, equipment simple，easy to operate and the proportion of stoichiometric easy to control. This experiment using the traditional Sol - gel method, in the formulation of excessive water system, used as the precursor titanate butyl Of ethanol as solvents, different types and amount of acid catalyst in the low temperature through the hydrolysis direct titanate butyl fully prepared containing the nano-crystalline TiO2 Sol, Sol without going through any have a good handle on the photocatalytic properties.
This article focuses on the impact that different acid catalyst for the phase, morphology, photocatalytic properties of. TiO2 Sol. It wap found that different acid catalyst for the TiO2 Sol, a greater impact on the morphology, particularly in the morphology show on a variety of crystal shape. Different acid catalyst have an important impact on the photocatalytic of TiO2 Sol, in general, the less the amount of catalyst, the more the hydrolysis titanate butyl thorough, effective unit volume, the more accumulation of particles, the less the complex , To participate in Photocatalytic Degradation of Rhodamine dye particles, the more decentralized system in the dispersion of similar, the better its photocatalytic effect. In addition to the amount of catalyst , Sol photocatalytic activity with the decentralized system of relevant influence the extent of the hydrolysis butyl titanate 。When dispersed a difference too far in the dispersion o samples of the photocatalytic efficiency will be affected by significant impact on .
Keywords：Titanium Dioxide Sol - gel Photocatalytic Catalyst
