油溶性LaF_3纳米颗粒的制备及表征

Preparation and Characterization of Oil-Soluble LaF_3 Nanoparticles

以油酸镧和氟化钠为主要原料,在甲苯和水两相体系中制备了油酸镧表面修饰的LaF3纳米颗粒。并用透射电子显微镜、红外光谱仪、X-射线光电子能谱等现代分析手段对所得的LaF3纳米颗粒进行结构表征。结果表明,所制备的油酸镧修饰LaF3纳米颗粒大小均匀,粒径约为10nm,由于表面修饰剂油酸镧与LaF3纳米颗粒表面之间发生化学键合作用,使得油酸镧修饰LaF3纳米颗粒在低极性有机溶剂中的分散性明显提高。

Lanthanum oleate surface capped LaF3 nanoparticles were chemicds synthesized in biphasic system containing toluene and water by using lanthanum oleate and sodium fluoride as the raw material. Transmission electron microscope （TEM）, infrared spectrometer （IR）, and X-ray photoelectron microscopy （XPS） were used to characterize the prepared LaF3 nanoparticles. The results indicated that capped LaF3 nanoparticles, with the average diameter of about 10 nm, were capable of being dispersed stably in low-polar organic solvents. Results also showed that lanthanum oleate capped LaF3 nanoparticles distributed uniformly with average diameter of about 10 nm. Because of the modification agent lanthanum oleate reacted with the LaF3 nanoparticles, the dispersion capacity of lanthanum oleate capped LaF3 nanoparticles in low polar organic solvent was improved effectively.