掺锶量对羟基磷灰石形貌及其荧光特性的影响

Influence of Strontium on Hydroxyapatite Morphology and Luminescence Characteristics

采用水热合成法制备了一系列具有不同微观形貌和荧光性能的掺锶羟基磷灰石粉末。通过X射线衍射、红外光谱、电子能谱、扫描电镜和荧光光谱表征样品的物相、形貌及荧光性能。结果表明:所制备的样品形貌为1～3μm的由微小晶粒聚集而成的球形颗粒,但随着掺锶量的变化,组成球形颗粒的微小晶粒形貌会出现较大的差异。未掺锶羟基磷灰石晶粒形貌为短棒状,随着掺锶量的增加,微小晶粒逐渐变为片状而后转变为长棒状。样品能在紫外光(波长351 nm)激发下发出明亮的蓝色荧光(波长375～500 nm,最强峰位432 nm),且荧光强度随掺锶量增加先增强,而后减弱,在掺锶量为30mol%时达到最大。

Strontium Hydroxyapatite （SrxCa10-x（PO4）6（OH）2, x=0, 3, 5, 10） powder with fluorescence property was successfully synthesized by a facile hydrothermal process. X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectra, field emission scanning electron microscope and photoluminescence excitation and emission spectra were employed to analyze phase change, characteristics and fluorescence property of samples. The experimental results indicate that the morphology of samples is spherical particle（D=l-2 μm）, and with the amount of strontium changed from 0 to 100mol%, the morphology of spherical particle changes from short nanorods to nanosheets and then long nanorods. The samples show an intense and bright blue emission from 375 nm to 500 nm centered at 432 nm under long-wavelength UV light excitation （351 nm）. The PL emission intensity firstly increases and then decreases with increasing the strontium content. When strontium content is 30%, the PL emission intensity reaches the maximum.