Surface Coating of TiO_2 Powder


Peixin Zhang~(1,2,a) Dongyun Zhang~(1,b) Qi Qiu~(2,c) Li Jing~(2,d) Xiangzhong Ren~(2,e) 1School of Materials Science and Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,P.R.China 2School of Chemistry and Chemical Engineering,Shenzhen University,Shenzhen 518060,P.R.China;


<正>SiO_2 nano-scale films were coated on the surface of TiO_2 powder by liquid phase deposition.The morphology and the composition of coated TiO_2 were studied by transmission electron microscopy (TEM),X-ray photoelectronic spectrscopy (XPS),and X-ray fluorescence (XRF).The study showed that a continuous SiO_2 nano-scale film was coated on the TiO_2 particles, and the element Si was bonded to the surface of TiO_2 in the form of the Ti-O-Si bond.The most suitable conditions for coating are:0.5 mol·L~(-1) of C_(Na_2SiO_3);pH value of 9.5;200 g·L~(-1) of C_(TiO_2), reaction time of 5 h at 85℃.


TiO_2;;liquid phase deposition;;surface coating


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