磷酸一氢钙在甲醇中转化为β-磷酸三钙纳米晶的研究  

Crystal Transformation from CMHP to β-TCP in Methanol

作　　者：徐子颉[1] 马超[1] 王芬芬[1] 吉涛[1] 夏炳忠[1] 甘礼华[1] 

机构地区：[1]同济大学化学系,上海200092

出　　处：《无机化学学报》2012年第2期215-220,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家863项目(No.2007AA03Z313);国家自然科学基金(No.20973127)资助项目

摘　　要：以一水合醋酸钙、浓磷酸为原料,采用湿化学合成法预先合成磷酸一氢钙（CMHP）,在室温将其浸泡于定期更换的无水甲醇中,经过72 h的浸泡,CMHP转化为β-磷酸三钙（β-TCP）纳米晶。对所得样品分别进行X射线粉末衍射仪（XRD）、激光拉曼散射光谱（Raman）以及透射电镜（TEM）表征,结果表明,所得短棒状β-TCP的晶粒长度在30~60 nm之间;CMHP电离产生的氢离子通过CMHP和甲醇之间的界面层,进入甲醇本体,促使CMHP的电离以及向β-TCP的晶型转化,这种晶型转化不经过无定形态而直接转化为β-TCP纳米晶。Calcium monohydrogenphosphate（CMHP） were pre-fabricated by using calcium acetate monohydrate and concentrated phosphoric acid as starting materials and CMHP were transformed to β-tricalcium phosphate（β-TCP） by soaking them in exchanged methanol for 72 h at room temperature.Resultant samples were characterized by using X-ray diffraction,Raman scattering spectra and electron microscopy methods,which indicates that β-TCP were nano-crystals in a needle shape with about 30~60 nm in length.The formation of the interface between CMHP and methanol is favorable to the transmission of hydrogen ions ionized from CMHP,resulting in the direct crystal transformation from CMHP to β-TCP nano-crystals.

关 键 词：磷酸一氢钙 Β-磷酸三钙 甲醇 纳米晶 

分 类 号：O614.231[理学—无机化学] O613.62[理学—化学]