利用浸渍法合成了Co3O4/SBA-15和CoFe2O4/SBA-15介孔纳米磁性材料,并利用X射线粉末衍射(XRD)、透射电子显微镜(TEM)、场发射扫描电子显微镜(FESEM)及振动样品磁强计(VSM)对样品的微观结构和磁性能进行了分析.结果显示,Co3O4及CoFe2O4纳米颗粒分布在SBA-15介孔材料的孔道中,可有效提高SBA-15介孔材料的磁性能.研究发现,SBA-15介孔纳米磁性材料的磁特性由掺杂的纳米磁性颗粒的性质决定,其磁性能随Co3O4及CoFe2O4含量的增加而升高,矫顽力可达400Oe,饱和磁化强度达9 emu/g.
参考文献
| [1] | Sen T,Sebastiandi A,Bruce I J.Mesoporous silica-magnetite nanocomposite:Fabrication and applications in magnetic bioseparations[J].J Am Chem Soc,2006,128(22):7130-7136. |
| [2] | Zhao W,Gu J,Zhang L,Chen H,Shi J.Fabrication of uniform magnetic nanocomposite spheres with a magnetic core/mesoporous silica shell structure[J].J Am Chem Soc,2005,127(25):8916-8917. |
| [3] | Zhu S,Zhou Z,Zhang D.Control of drug release though the in situ assembly of stimula-responsive ordered mesoporous silica with magnetic particles[J].Chem Phys Chem,2007,8(17):2478-2483. |
| [4] | Ruiz-Hernandez E,Lopez-Noriega A,Arcos D,IzquierdoBarba I,Vallet-Regi M.Aerosol-assisted synthesis of magnetic mesoporous silica sphere for drug targeting[J].Chem Mater,2007,19(14):3455-3463. |
| [5] | 徐如人,庞文琴,于吉红,霍启升,陈接胜.分子筛与多孔材料化学[M].北京:科学出版社,2004. |
| [6] | Zhao D,Feng J,Huo Q,Melosh N,Fredrickson G H,Chmelka B F,Stucky G D.Triblock eopolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores[J].Science,1998,279(5350):548-552. |
| [7] | 吴玉程,李广海,张立德.纳米镍/介孔二氧化硅复合材料的组装及结构和性质Ⅱ:纳米镍/介孔二氧化硅复合材料的光吸收性质[J].复合材料学报,2005,22(6):27-31.WuYucheng,Li Guanghai,Zhang Lide.Assembly,microstructure and properties of nanocomposite mesoporous silica loaded with nickel II:Optical absorption properties of nanoeomposite mesoporous silica loaded with nickel[J].Acta Materiae Compositae Sinica,2005,22(6):27-31. |
| [8] | Wang X Q,Ge H L,Jin H X,Cui YJ.Influence of Feon the thermal stability and catalysis of SBA-15 mesoporous molecular sieves[J].Micropor Mesopor Mater,2005,86(1-3):335-340. |
| [9] | Jin H X,Li L,Chu N J,Liu Y P,Wang LY,Lu Q,Qian J,Sun L N,Tang Q,Ge H L,Wang X Q.Magnetic properties of nanocomposite Fe-doped SBA-15 magnetic materials[J].Mater Chem Phys,2008,112(1):112-114. |
| [10] | 李良,褚宁杰,金红晓,葛洪良,王新庆.FexOy/SBA-15介孔分子筛的合成以及性能研究[J].无机化学学报,2007,23(10):1753-1757.Li Liang,Chu Ningjie,Jin Hongxiao,Ge Hongliang,Wang Xinqing.Synthesis and performance of FexOy-doped SBA-15 mesoporous molecular sieves[J].Chin J Inorg Cbem,2007,23(10):1753-1757. |
| [11] | Zhu S M,Zhou Z Y,Zhang D,Jin C,Li Z Q.Design and synthesis of delivery system based on SBA-15 with magnetic paenicles formed in situ and thermo-sensitive PNIPA as controlled swith[J].Micropor Mesopor Mater,2007,106(1-3):56-61. |
| [12] | JungJ S,Choi K H,Jung Y K,Lee S H,Golub V O,Malkinski L,O'Connor C J.Preparation and characterization of y-Fe2O3 nanoparticles in SBA15 host material[J].J Magn Magn Mater,2004,272-276(S1):E1157-E1159. |
| [13] | Tajiri T,Degnchi H,Kohiki S,Mito M,Takagi S,Tsuda K,Murakami Y.Novel size effect of LaMnO3+δ nanocrystals embedded in SBA-15 mesoporous silica[J].J Phys Soe Jpn,2006,75(11):1137041-1137044. |
| [14] | Souza K C,Salazar-Alvarez G,Ardisson J D,Macedo W A A,Sousa E M B.Mesoporous silica-magnetite nanocomposite synthesized by using a neutral surfactant[J].Nanotechnology,2008,19(18):185603-185609. |
| [15] | Koekrick E,Krawiec P,Schnelle W,Geiger D,Sehappacher F M,Pottgen R,Kaskel S.Space-confined formation of FePt nanoparticles in ordered mesoporous silica SBA-15[J].Adv Mater,2007,19(19):3021-3026. |
| [16] | Li S X,Zhang J C,Shen Y S,Ni B,Zhang J G.Synthesis and properties of magnetic nanoparticles[J].J Mater Sei Tech,2006,22(5):659-663. |
| [17] | Du Y,Liu S,Ji Y,Zhang Y,Xiao N,Xiao F.Ordered mesoporous silica materials(SBA-15)with good heatresistant magnetism[J].J Magn Magn Mater,2008,320(13):1932-1936. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%