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中文摘要：
以改性Fe3O4颗粒为核，采用溶胶-凝胶法在Fe3O4核表面包覆SiO2壳层，并在SiO2孔道内负载纳米TiO2颗粒，得到易于固-液分离、平均直径为90～150nm的具有核壳结构的Fe3O4-TiO2-MCM-41光催化剂复合颗粒．采用透射电镜、X射线衍射、X射线光电子能谱等手段对样品进行表征，并对该催化剂的光催化性能进行测试。结果表明：所制备的磁性分子筛催化剂在紫外光下对苯酚的降解率达94．12％，对重金属离子Cr^6＋的吸附能达到95．05％。
英文摘要：
The nano-sized modified Fe3O4 particles were used as cores and SiO2 layers were coated on their surface, then TiO2 nano-particles were deposited in the pores by sol-gel process, the magnetic Fe3O4-TiO2-MCM- 41composite nano-particles with core-shell structure in size between 90-150 nm were successfully prepared. The products were characterized by TEM,XRD. XPS, etc. The photodegradation phenol and absorption Cr （ VI ） from water with the magnetic nano-particles were carried out. The results showed that the as-synthesized magnetic nano-particles had high photocatalytic degradation （94.12%） for organic substances and absorption capabilities （95.05%） for heavy metal ions.
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