|
|
bingd600420(金币+30, 翻译EPI+1): 谢谢 2011-01-18 13:27:45
Test results indicated that Mg2+ had the typical adsorption on the coating surface of nano- ZrO2 but Na+ wasn’t.The coating surface of nano- ZrO2 wasn’t easy to result in it’s lattice’s electric charge unbalanced and generated adsorption of other ions.Due to hydrate Cl- wasn’t easy complexing with Zr4+ on the surface of cardinal nano- ZrO2 in NaCl diluted aqueous solution,therefore, we could remove the possibility for the typical adsorption of Cl – and the non-DLVO acting force was only produced by the typical adsorption of Mg2+ .
Primarily due to the hydrolysis on the surface of nano- ZrO2 or the lone paired electron of O in OH- accept proton so as to make the surface become electropositive or electronegative.
ZrsurfaceOH→ZrOsurface-+H+ or ZrsurfaceOH+H+→ZrsurfaceOH2+
Putting ZrO2 substrate on 10-3mol/L aqueous solution for MgCl2 and NaCl stay for 2h,respectively,then washing with deionized water for 10 times and dunking in nitric acid for 2h,after that using AAS to characterize,the results indicated that we could only detect the trace quantity of Mg but not for Na in soak solution.This thirdly indicated that Mg2+ had the typical adsorption on the coating surface of nano- ZrO2 but Na+ wasn’t. |
|
回复此楼