Journal
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Volume 31, Issue 2, Pages 166-172Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2010.08.014
Keywords
Monodispersed mesoporous silica spheres; Tunable pore size; Au nanoparticles; Urease
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Funding
- National Natural Science Foundation of China [20925621, 20976054]
- Science and Technology for Ministry of Education [107045]
- Shanghai Municipal Education Commission [09ZZ58]
- Shanghai Subject Chief Scientist [08XD1401500]
- Shuguang Scholar-Tracking Foundation of Shanghai [08GG09]
- Shanghai Leading Academic Discipline Project [B502]
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Monodispersed mesoporous silica spheres (MMSS) with controllable porosity and pore size were successfully prepared by calcination method in the presence of complex salts. The effect of calcination temperature on the pore size of MMSS was examined. The results show that the pore size of MMSS samples can be tuned in the range from 3.20 to 46.80 nm by varying the calcination temperature. It is worth mentioning that the pore size of MMSS can be controlled on a much larger scale by this method compared to the templating approach, by which the pore size can only be expanded up to 10 nm. It is very advantageous for the application in loading enzymes. Moreover, it could be found that the method is feasible, effective and simple. In addition, the use of various MMSS samples as adsorbents for Au nanoparticles of different sizes as well as urease has also been demonstrated. It was confirmed that MMSS with adequate surface charge and optimum matching pore size showed excellent adsorption properties for Au nanoparticles and urease. (C) 2010 Elsevier B.V. All rights reserved.
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