PMID- 18687444
OWN - NLM
STAT- MEDLINE
DCOM- 20081029
LR  - 20151119
IS  - 1095-7103 (Electronic)
IS  - 0021-9797 (Linking)
VI  - 326
IP  - 1
DP  - 2008 Oct 1
TI  - Facile synthesis of ordered magnetic mesoporous gamma-Fe2O3/SiO2 nanocomposites 
      with diverse mesostructures.
PG  - 158-65
LID - 10.1016/j.jcis.2008.07.012 [doi]
AB  - On the basis of a sol-gel process, a facile, low cost, and one-step approach for 
      preparing ordered magnetic mesoporous gamma-Fe(2)O(3)/SiO(2) nanocomposites by an 
      evaporation-induced self-assembly (EISA) approach is presented. Various 
      mesostructured silica materials (P6mm or Im3m) incorporated with different 
      amounts of iron oxide (n(Si)/n(Fe) = 9/1, 8/2, 7/3, respectively) were 
      synthesized and characterized by XRD, TEM, N(2)-sorption analyses, and 
      superconducting quantum interference device (SQUID) magnetometer. The 
      HCl-leaching experiments together with TEM micrographs and nitrogen sorption 
      analysis suggested that most of the gamma-Fe(2)O(3) domains of several nanometers 
      were embedded in the silica walls, rather than dispersed in the mesopores, which 
      could cause the significant pore clogging reported in some studies. The release 
      behaviors of lysozyme from these magnetic porous nanocomposites were investigated 
      for the possible application of drug targeting and control release. The influence 
      of iron precursors was also studied and a possible mechanism was proposed. The 
      hydrolysis of Fe(3+) ions under weakly acidic conditions and the induced 
      formation of Si-O-Fe bonds may account for the synthesis of this kind of 
      nanocomposite. These multifunctional nanostructured materials would have a wide 
      range of applications in toxin removal, catalysis, waste remediation, and 
      biological separation as well as novel drug-carrier technologies.
FAU - Wang, Yangang
AU  - Wang Y
AD  - Lab for Advanced Materials, Research Institute of Industrial Catalysis, East 
      China University of Science and Technology, Meilong Road 130, Shanghai 200237, 
      People's Republic of China.
FAU - Ren, Jiawen
AU  - Ren J
FAU - Liu, Xiaohui
AU  - Liu X
FAU - Wang, Yanqin
AU  - Wang Y
FAU - Guo, Yun
AU  - Guo Y
FAU - Guo, Yanglong
AU  - Guo Y
FAU - Lu, Guanzhong
AU  - Lu G
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20080806
PL  - United States
TA  - J Colloid Interface Sci
JT  - Journal of colloid and interface science
JID - 0043125
RN  - 0 (Ferric Compounds)
RN  - 1K09F3G675 (ferric oxide)
RN  - 7631-86-9 (Silicon Dioxide)
RN  - EC 3.2.1.17 (Muramidase)
SB  - IM
MH  - Adsorption
MH  - Ferric Compounds/*chemistry
MH  - *Magnetics
MH  - Microscopy, Electron, Transmission
MH  - Muramidase/chemistry/isolation & purification
MH  - Nanocomposites/*chemistry
MH  - Nanotechnology/methods
MH  - Phase Transition
MH  - Silicon Dioxide/*chemistry
MH  - Spectroscopy, Fourier Transform Infrared
MH  - X-Ray Diffraction
EDAT- 2008/08/09 09:00
MHDA- 2008/10/31 09:00
CRDT- 2008/08/09 09:00
PHST- 2008/04/14 00:00 [received]
PHST- 2008/06/20 00:00 [revised]
PHST- 2008/07/08 00:00 [accepted]
PHST- 2008/08/09 09:00 [pubmed]
PHST- 2008/10/31 09:00 [medline]
PHST- 2008/08/09 09:00 [entrez]
AID - S0021-9797(08)00816-3 [pii]
AID - 10.1016/j.jcis.2008.07.012 [doi]
PST - ppublish
SO  - J Colloid Interface Sci. 2008 Oct 1;326(1):158-65. doi: 
      10.1016/j.jcis.2008.07.012. Epub 2008 Aug 6.