School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
J Colloid Interface Sci. 2010 Sep 15;349(2):473-6. doi: 10.1016/j.jcis.2010.05.069. Epub 2010 May 23.
Pore size adjustable mesoporous silica was synthesized by adsorption of varying amounts of sodium dodecyl benzenesulfonate at the surface of silica activated by zinc ion via a novel surface charge reversal route. The pore size and volume can be adjusted from 5.9 to 13.76 nm and 0.88 to 1.08 cm(3) g(-1), respectively, with increasing the SDBS concentration from 0.77 to 3.08 mmol L(-1). Adsorption of Zn(2+) as a function of pH and N(2) adsorption/desorption isotherms demonstrated that the metal ions such as Zn(2+) could be readily removed with dilute nitric acid without apparent collapse of the pore structure at the proper range of SDBS concentration.
通过一种新颖的表面电荷反转途径，利用锌离子对二氧化硅进行活化，吸附不同量的十二烷基苯磺酸钠，合成了孔径可调节的介孔二氧化硅。随着 SDBS 浓度从 0.77mmol/L 增加到 3.08mmol/L，孔径和孔体积可分别从 5.9nm 调节到 13.76nm 和从 0.88cm³/g 调节到 1.08cm³/g。pH 值对 Zn(2+)的吸附和 N2 吸附/脱附等温线的研究表明，在适当的 SDBS 浓度范围内，金属离子如 Zn(2+)可以用稀硝酸很容易地去除，而不会明显破坏孔结构。
