摘要
本文以Ca(NO3)2和(NH4)2HPO4为原料,采用重结晶法,在水热条件下制备了羟基磷灰石(HA)纳米棒;利用X-射线衍射(XRD)、透射电镜(TEM)、高分辨透射电镜(HRTEM)、红外光谱(FTIR)等分析测试手段,研究了pH值和晶化时间对HA组成和结构的影响。实验结果表明,室温混合pH值为7.5的沉淀物和pH值为10.5的清液,于180℃下水热处理10h重结晶制得的HA纳米棒的平均长径比最长(约为28);采用不同pH值的清液,体系的单体浓度(即化学势)改变时,得到的HA纳米棒的长径比不同;随着晶化时间延长,纳米棒的长径比先增大后减小。
Hydroxyapatite nanorods were prepared by hydrothermal recrystallization method using Ca（NO3）2 and （NH4）2HPO4 as raw materials. XRD, TEM, HRTEM and FTIR were used to characterize the hydroxyapatite nanorods. The effect of pH value, crystallization time were studied on the compositions and structures of hydroxyapatite nanorods. The best aspect ratio of ca. 28 could be obtained for the hydroxyapatite nanorods prepared by hydrothermal heat-treatment at 180℃ and recrystallization of the room temperature mixture of the suspension at pH value 7.5 and the clear solution of pH value of 10.5. With different pH values of clear solution, as monomer concentration （chemical potential） changed, the aspect ratio of hydroxyapatite nanorods were different; when crystallization time elongated, the aspect ratio of hydroxyapatite nanorods was increased first, then decreased.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第1期86-90,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20571007)
关键词
水热重结晶法
羟基磷灰石
纳米棒
hydrothermal recrystallization method
hydroxyapatite
nanorods
