羟基磷灰石纳米棒的水热制备及其晶体生长机理研究EI北大核心CSCD

以无水CaCl 2和(NH 4)2HPO 4为原料,尿素为均相沉淀剂,十六烷基三甲基溴化铵(CTAB)为模板剂,利用水热法制备了羟基磷灰石(HA)纳米棒。采用X射线衍射仪(XRD)、扫描电镜(SEM)和透射电镜(TEM)对产物的物相组成、微观形貌进行了表征。结果表明:通过改变反应温度和时间,可实现HA纳米形貌的可控微调。在120℃水热反应12 h可以制备出单晶密排六方结构HA纳米棒,其长约为0.5~1.0μm,直径约为15~30 nm。并从晶体结构的角度详细研究了CTAB在合成纳米棒结构中所起的作用,并通过实验进行了验证。

Hydrothermal synthesis and crystal growth mechanism of hydroxyapatite nanorods

Hydroxyapatite(HA)nanorods were synthesized by hydrothermal process using anhydrous CaCl 2 and(NH 4)2HPO 4 as raw materials,urea was used as a homogeneous precipitation agent;hexadecyltrimethy ammonium bromide(CTAB)was used as a template agent.Phase composition and microstructure of the products were characterized via X-ray diffractometer(XRD),scanning electron microscope(SEM)and transmission electron microscopy(TEM).The results show that the morphologies of HA nanorods can be controllably fine-tuning by changing the reaction temperature and time.Hexagonal single crystal HA nanorods single structure can be obtained at 120℃for hydrothermal 12 h,its length is about 0.5-1.0μm,diameter is about 15-30 nm.Finally,the role of CTAB was studied by the formation process of nanorods crystalline structure in details,and verified by experiment.