Hierarchical Three-Dimensional Cobalt Phosphate Microarchitectures : Large-Scale Solvothermal Synthesis, Characterization, and Magnetic and Microwave Absorption Properties
Hierarchical Three-Dimensional Cobalt Phosphate Microarchitectures : Large-Scale Solvothermal Synthesis, Characterization, and Magnetic and Microwave Absorption Properties
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DOI：
10.1021/jp804602b
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发表时间：
2008-09
影响因子：
3.7
通讯作者：
He Wen;Minhua Cao;Genban Sun;Wenguo Xu;Dan Wang;Xiaoqiang Zhang;Chang-Wen Hu
中科院分区：
文献类型：
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作者：
He Wen;Minhua Cao;Genban Sun;Wenguo Xu;Dan Wang;Xiaoqiang Zhang;Chang-Wen Hu
在溶剂热条件下合成了不同形貌的新型分级结构磷酸钴（α-和β-Co2 P2 O 7）和磷酸氢钴[Co-11（HPO 3）（8）（OH）（6）]三维结构。通过调节反应体系的实验参数，可以很容易地调节磷酸钴的形式和形状。当Co2+/H3 PO 4/CH 3 NH 2/HO（CH 2）（2）OH的摩尔比为1：1.2：1：108，反应温度为180 ℃，反应时间为5 d时，得到了具有篮状微结构的新型分级α-Co2 P2 O 7微晶;当Co2 +/H3 PO 4/CH 3 NH 2/HO（CH 2）（2）OH的摩尔比为1：1.2：1：108，反应温度和时间相同时，得到了哑铃状β-Co2 P2 O 7微球。54，和具有牡丹状纳米结构的Co-11（HPO 3）（8）（OH）（6），以与β-Co2 P2 O 7相同的摩尔比和反应时间，但反应温度为120 ℃。采用X射线衍射（XRD）、场发射扫描电子显微镜（FE-SEM）、傅里叶变换红外光谱（FT-IR）、量子设计超导量子干涉仪（SQUID）磁强计和网络分析仪对样品进行了表征。详细研究了磷酸钴微结构的形成机理。
Novel hierarchical cobalt phosphate (alpha- and beta-Co2P2O7) and cobalt hydrogen phosphate hydroxide [Co-11(HPO3)(8)(OH)(6)] three-dimensional (3D) architectures with different morphologies were synthesized under a solvothemal condition. The form and shape of cobalt phosphate can be readily tuned by adjusting experimental parameters of the reaction system. The novel hierarchical alpha-CO2P2O7 microcrystals with basketry-like microstructures were obtained with a molar ratio of Co2+/H3PO4/CH3NH2/HO(CH2)(2)0OH of 1:1.2:1:108, the reaction temperature of 180 degrees C, and the reaction time of 5 days; dumbbell-like beta-Co2P2O7 microspheres were formed with the same reaction temperature and time but the molar ratio of 1: 1.2:1:54, and Co-11(HPO3)(8)(OH)(6) with peony-like nanostructures was prepared with the same molar ratio and reaction time as beta-Co2P2O7 but the reaction temperature of 120 degrees C. The samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectra (FT-IR) technologies, a Quantum Design superconducting quantum interference device (SQUID) magnetometer, and a network analyzer. The formation mechanism of cobalt phosphate microstructures was investigated in detail.