Hydrothermal synthesis of luminescent GdVO4:Eu nanoparticles with dispersibility in organic solvents
Hydrothermal synthesis of luminescent GdVO4:Eu nanoparticles with dispersibility in organic solvents
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DOI：
10.1007/s11051-014-2378-2
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发表时间：
2014-04
影响因子：
2.5
通讯作者：
Varu Singh;S. Takami;Nobuaki Aoki;D. Hojo;T. Arita;T. Adschiri
中科院分区：
文献类型：
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作者：
Varu Singh;S. Takami;Nobuaki Aoki;D. Hojo;T. Arita;T. Adschiri
以超临界水为绿色溶剂，采用常规水热法制备胶体钒酸钆纳米晶。超临界水的惊人性质有利于合成结晶和表面改性的发光纳米颗粒，在颗粒表面上用有机改性剂的长烷基链封端，使它们可分散在非极性溶剂中。纳米粒子的尺寸可以控制在10-15 nm。使用X射线衍射，透射电子显微镜（TEM），高分辨率TEM，傅里叶变换红外光谱，热重分析，和电子色散X射线散射的水热产物的表征完成。光致发光特性表明，在紫外光激发下，该材料有较强的红光发射，拓宽了材料的应用范围。
A general hydrothermal method was developed to prepare colloidal gadolinium orthovanadate nanocrystals by using supercritical water as a green solvent. The spectacular properties of supercritical water is advantageous for synthesizing crystalline and surface-modified luminescent nanoparticles capped with long alkyl chains of organic modifiers on the surface of the particles to make them dispersible in nonpolar solvents. The size of the nanoparticles could be controlled within 10–15 nm. Characterization of the hydrothermal product was accomplished using X-ray diffraction, transmission electron microscopy (TEM), high-resolution TEM, Fourier transform infrared spectroscopy, thermo gravimetric analysis, and electron dispersive X-ray scattering. The photoluminescence characterization showed that there is a strong red emission under UV excitation, which broadens the material’s various applications.