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Preparation and Characterization of Polyoxychromium PiIlared Montmorillonite

WANG Lianbo XU Jianru LU Yi XIANG Sifen HUA Tongwen(Department of Chemistry,Peking University,Beijing,100871)  
In this work,polyoxychromium pillared montmorillonites(Cr-Mt)have been synthesized by ion exchange method with Na-montmorillonite and characteri-zed by a series of physical-chemical methods.The experimental results indicate that the higher ageing temperature the shor-ter ageing time. Some properties of Cr-Mt are better than that of Na-Mt.Their basal spacings(d_(001))are 1.6~1.9nm,specific surface areas are 80~190 m ̄2·g ̄(-1) ,pore size of 1.8~5. 0 nm is about 50%,total surface acidities are 6. 1×10 ̄(-4)~6. 5×10 ̄(-4) mol·g ̄(-1),cation exchange capacities are 9.0×10 ̄(-3)~42 × 10 ̄(-3)mol/100g. However,its thermal stability is worse.
【Fund】: 国家自然科学基金
【CateGory Index】: O643.36
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