Anatase TiO2 nanoparticle coating on barium ferrite using titanium bis-ammonium lactato dihydroxide and its use as a magnetic photocatalyst
Anatase TiO2 nanoparticle coating on barium ferrite using titanium bis-ammonium lactato dihydroxide and its use as a magnetic photocatalyst
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DOI：
10.1021/cm0351902
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发表时间：
2004-02
影响因子：
8.6
通讯作者：
Seungwoo Lee;J. Drwiega;Changzheng Wu;and David Mazyck;W. Sigmund
中科院分区：
文献类型：
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作者：
Seungwoo Lee;J. Drwiega;Changzheng Wu;and David Mazyck;W. Sigmund
在相对较低的温度(95°C)下，通过双铵盐氢氧化钛在较低温度(95°C)下的可控水解和缩合反应，将粒径小于10 nm的锐钛矿型纳米二氧化钛包覆在钡铁氧体表面。所制备的复合粒子(硬磁性BaO铁氧体(核)−锐钛矿型纳米粒子(壳))可以作为磁性光催化剂，在外加磁场的作用下进行流态化和回收，提高了修复液的分离和混合效率。用扫描电子显微镜和透射电子显微镜对复合粒子的形貌进行了表征。用X射线衍射仪和电子衍射仪对二氧化钛的晶体结构进行了表征。利用能量色散光谱对产物进行了元素分析。结果表明，所制备的TiO2光催化活性高于TiO2光催化活性，−复合光催化性能优于TiO2光催化活性。
Photoactive anatase TiO2 nanoparticles with a size less than 10 nm were coated on barium ferrite forming complete coverage by the controlled hydrolysis and condensation of titanium bis-ammonium lactato dihydroxide in the presence of polyethyleneimine at a relatively low temperature (95 °C). The as-prepared composite particles (hard magnetic barium ferrite (core)−anatase TiO2 nanoparticles (shell)) can be utilized as a magnetic photocatalyst, which can be fluidized and recovered by an applied magnetic field enhancing both the separation and mixing efficiency for remediating fluids. The morphology of composite particles was characterized with scanning electron microscopy and transmission electron microscopy. The crystalline structure of TiO2 was characterized by X-ray diffraction and electron diffraction. Energy-dispersive spectroscopy was utilized for the elemental analysis of the products. The as-prepared TiO2−barium ferrite composite has higher photocatalytic activities than the TiO2−barium ferrite compo...