Magnetic and photocatalytic study of Co3O4–ZnO nanocomposite
Magnetic and photocatalytic study of Co3O4–ZnO nanocomposite
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DOI：
10.1016/j.jallcom.2015.09.040
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发表时间：
2015-12
影响因子：
6.2
通讯作者：
T. Jana;A. Pal;K. Chatterjee
中科院分区：
文献类型：
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作者：
T. Jana;A. Pal;K. Chatterjee
通过化学途径合成了Co3O4-ZnO纳米复合材料。结构、成分和形态分析证明，纳米复合材料的成功形成，具有几乎核壳型结构，粒径范围为 10-40 nm。通过测量不同磁场和温度下的磁化强度，对纳米复合材料进行了磁性研究。在~15 K以下观察到 Co3O4-ZnO 纳米复合结构的快速磁排列，并根据其界面效应解释了该行为。这种耦合半导体系统也经过了光催化应用的检验，对罗丹明 B 的研究表明该材料在光降解污染物有机染料方面表现出优异的能力。材料的光催化效率归因于系统有效电荷分离和电荷转移的能力。总体而言，Co3O4-ZnO 纳米复合体系在磁性和光催化行为方面具有协同效应。
Co3O4–ZnO nanocomposite has been synthesized by chemical route. Structural, compositional and morphological analyses evidenced the successful formation of the nanocomposite with almost core–shell type structure having particle size of 10–40 nm range. Magnetic study of the nanocomposite has been carried out by measuring magnetization with varying magnetic field and temperature. Rapid magnetic alignment of the Co3O4–ZnO nanocomposite structure has been observed below ∼15 K and the behaviour is explained on the basis of their interface effect. This coupled semiconductor system has also been examined for the photocatalytic application and the study on rhodamine B exhibits excellent capacity of the materials for the application in photodegradation of the pollutant organic dye. The photocatalytic efficiency of the materials has been attributed to the capacity of effective charge separation and charge transfer of the system. As a whole, the Co3O4–ZnO nanocomposite system gives synergistic effect in magnetic and in photocatalytic behaviour.