In this work, we study the generation of visible and near-infrared (NIR) luminescence associated with the formation of point defects in hydroxyapatite (HAp) nanobelts. Three different HAp samples were synthesized by a modified hydrothermal method at growth times of 24, 30, and 36 h. Transmission electron microscopy measurements revealed the presence of stacking faults in the nanobelts grown during shorter times. X-ray diffraction and Raman spectroscopy measurements confirmed the high crystalline quality of the samples, showing a hexagonal calcium deficient (Ca-D) HAp phase, supported by the Ca/P ratio of 1.2 and 1.3 revealed by X-ray photoelectron spectroscopy and energy dispersive spectroscopy measurements, respectively. Electron paramagnetic resonance, photoluminescence, and cathodoluminescence measurements demonstrated the presence of hydroxyl ion vacancies (V_OH⁻), calcium vacancies (V_Ca), and oxygen vacancies (V_O) in HAp nanobelts generates a strong luminescence in the visible and NIR ranges.

在这项工作中，我们研究了与羟基磷灰石（HAp）纳米带中点缺陷的形成相关的可见光和近红外（NIR）发光的产生。通过改进的水热法在24、30和36小时的生长时间合成了三个不同的HAp样品。透射电子显微镜测量显示在较短时间内生长的纳米带中存在堆垛层错。X射线衍射和拉曼光谱测量结果证实了样品的高结晶质量，显示出六方钙缺乏（Ca-D）HAp相，由X射线光电子能谱和能量显示的Ca / P比为1.2和1.3支持。色散光谱测量。电子顺磁共振，光致发光，_OH ^- ），钙空缺（V_钙），和氧空位（V _ø在羟基磷灰石纳米带）生成在可见和NIR范围内的强发光。