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Preparation of Nanometer Composite Particles with Inorganic Surface Modifier(PDF)


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Preparation of Nanometer Composite Particles with Inorganic Surface Modifier
YangYi LiFengsheng LiuHongying TanLinghua
National Special Superfine Powder Center of Science and Technology, NUST,Nanjing 210094
surface modif ier dioxide t itanium dioxide silicon nanometer material composite material
Porous nanometer TiO2/ SiO2 composite part icles w ere prepared by Ti( SO4) 2 and w ater glass. Hig h concent rat ion inorganic surface modif ier solut ion w as used to form modifier crystal f ilm on nanometer composite part icles. T he heat t reatment process, which is one of the key points of the ex periment, w as divided into three stages based on the TA- TG test ing of the modif ier solut ion, and 80 ℃, 120 ℃ and 600 ℃ w ere employed at each stage. Af ter heat treatment , the modifier crystal film on particles w as decomposed. Consequently, w el-l dispersed nanometer composite powder w as obtained. T he characterist ics of the composite particles w ere invest igated by means of XRD, TEM and FT IR. It w as indicated that T iO2 part icles w ere coated w ith porous SiO2 film in the form of 12. 6 nm crystal part icles, and the composite part-i cles w ere about 20 nm in single-dispersed form. And Ti - O - Si bonds were formed in the T iO2/ SiO2 nanometer composite part icles.


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Last Update: 2013-03-17