EFFECT OF NANOMETER SURFACE TREATMENT TECHNOLOGY ON CERAMIC MATERIAL PHOTOCATALYSIS

摘要

Utilizing ceramic material—titanium dioxide semiconductor's property of degrading organic matter through photocatalysis, such material can find broad application in sewage water treatment and air cleaning. TiO_2 with nanometer dimensions prepared through nanotechnology has non-conventional characteristics: quantum size effect, surface and boundary effect and so on. This article discusses the effect and its mechanisms of surface nanometerized ceramic material on photocatalysis activity of TiO_2: visible improvement of photocatalysis activity when particle size is less than one critical value; quantum size effect of TiO_2 particle plays an important part here. Some of the latest applied examples of this technology are given. This technology is also a successful application of nanometer technology in practical domain.