聚乙二醇对纳米二氧化钛性质和应用的影响

The influence of polyethylene glycol on the nature and application of nano-titanium dioxide

TiCl4 was used as the precursor and PEG as a dispersant to prepare Nano TiO2 with direct hydrolysis method.The research result explains the influence of PEG with different molecular weight to the crystal and the grain size of the titanium dioxide.Furthermore,it also introduces the photo-catalytic degradative influence of the titanium dioxide to the formaldehyde and chromium(VI).Under 700° C sintering temperature,the result indicated hat a different ratio of rutile and the anatase titanium dioxide mixed crystal,with its grain size of 15-20mm,can be produced by PEG6000.The greatest degradation rate of formaldehyde and chromium(VI) was taken place when the amount of PEG was 4%.The basic pure rutile titanium dioxide with its grain size of 29-40nm can be produced by PEG1000.It indicated that the amount of PEG1000 used has no significant effect on the degradation rate of formaldehyde and chromium(VI).The better photo-catalytic effect happened with mixed grain of Cr(VI) instead of using anatase and rutile.

TiCl4 was used as the precursor and PEG as a dispersant to prepare Nano TiO2 with direct hydrolysis method.The research result explains the influence of PEG with different molecular weight to the crystal and the grain size of the titanium dioxide.Furthermore,it also introduces the photo-catalytic degradative influence of the titanium dioxide to the formaldehyde and chromium（Ⅵ）.Under 700℃ sintering temperature,the result indicated hat a different ratio of rutile and the anatase titanium dioxide mixed crystal,with its grain size of 15-20mm,can be produced by PEG6000.The greatest degradation rate of formaldehyde and chromium（Ⅵ） was taken place when the amount of PEG was 4%.The basic pure rutile titanium dioxide with its grain size of 29-40nm can be produced by PEG1000.It indicated that the amount of PEG1000 used has no significant effect on the degradation rate of formaldehyde and chromium（Ⅵ）.The better photo-catalytic effect happened with mixed grain of Cr（Ⅵ） instead of using anatase and rutile.