分别制备Fe3O4和ZnFe2O4粉体并以它们作为磁芯,葡萄糖为模板剂,氟钛酸铵为钛源,通过水热法制备出Fe3O4/C/TiO2和ZnFe2O4/C/TiO2前驱体,煅烧后获得磁性Fe3O4/TiO2和ZnFe2O4/TiO2空心球.采用扫描电子显微镜、X射线衍射仪、X射线光电子能谱仪分析了产物的形貌、结构和化学组成,用振动样品磁强计测试了样品的磁化强度.结果表明,以Fe3O4为磁芯得到的Fe3O4/TiO2空心球的比饱和磁化强度是ZnFe2O4为磁芯得到的ZnFe2O4/TiO2空心球的20倍.以亚甲基蓝溶液为降解模型,考察了磁芯Fe3O4添加量对Fe3O4/TiO2空心球在紫外光下的催化降解能力.结果显示,Fe3O4的添加量对Fe3O4/TiO2空心球的光降解性能影响较小,且Fe3O4/TiO2空心球的紫外光降解能力均比纯TiO2空心球略低,但Fe3O4/TiO2空心球具有在外加磁场下易于回收的优势,具有潜在的应用前景.
参考文献
| [1] | Ao Y;Xu J;Fu D et al.A simple method to prepare Ndoped titania hollow spheres with high photocatalytic activity under visible light[J].Journal of Hazardous Materials,2009,167(1/3):413-417. |
| [2] | Ao Y;Xu J;Fu D et al.A simple method for the preparation of titania hollow spheres[J].Catalysis Communications,2008,9(15):2574-2577. |
| [3] | Xiaofang Li;Kangle Lv;Kejian Deng .Synthesis and characterization of ZnO and TiO_2 hollow spheres with enhanced photoreactivity[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2009(1/3):40-47. |
| [4] | Chunyan Song;Wujiang Yu;Bin Zhao .Efficient fabrication and photocatalytic properties of TiO2 hollow spheres[J].Catalysis Communications,2009(5):650-654. |
| [5] | Yaodong Wang;Aiming Zhou;Zhiyuan Yang .Preparation of hollow TiO_2 microspheres by the reverse microemulsions[J].Materials Letters,2008(12/13):1930-1932. |
| [6] | Hua Gui Yang;Hua Chun Zeng .Preparation of Hollow Anatase TiO_2 Nanospheres via Ostwald Ripening[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,2004(11):3492-3495. |
| [7] | Jiaguo Yu;Shengwei Liu;Huogen Yu .Microstructures and photoactivity of mesoporous anatase hollow microspheres fabricated by fluoride-mediated self-transformation[J].Journal of Catalysis,2007(1):59-66. |
| [8] | Rachel A.Caruso;Andrei Susha;Frank Caruso .Multilayered Titania, Silica, and Laponite Nanoparticle Coatings on Polystyrene Colloidal Templates and Resulting Inorganic Hollow Spheres[J].Chemistry of Materials,2001(2):400-409. |
| [9] | Shinsuke Nagamine;Akiko Sugioka;Hiroyuki Iwamoto .Formation of TiO2 hollow microparticles by spraying water droplets into an organic solution of titanium tetraisopropoxide (TTIP) - Effects of TTIP concentration and TTIP-protecting additives[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,2008(2):168-175. |
| [10] | Li G;Liu F;Zhang Z .Enhanced photocatalytic activity of silica-embedded TiO2 hollow microspheres prepared by one-pot approach[J].Journal of Alloys and Compounds,2010,493(1/2):1-7. |
| [11] | 李纲,刘昉,阳启华,张昭.Si掺杂对TiO2空心微球微结构和光催化性能的影响[J].催化学报,2011(02):286-292. |
| [12] | 罗尔斯 K M;考特尼 T H;伍尔夫 J;范玉殿,夏宗宁,王英华.材料科学与材料工程导论[M].北京:科学出版社,1982:537-538. |
| [13] | 刘芬,陈萦.含铁化合物的Fe2p和Fe3s电子能谱研究[J].分析测试技术与仪器,2001(03):166-169. |
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