介孔羟基磷灰石与氨基修饰碳点复合结构的制备及性能研究

Preparation and Properties of the Composites of Mesoporous Hydroxyapatite and Amine-functionalized Carbon Dots

通过在一定水热条件下混合介孔羟基磷灰石(Mesoporous hydroxyapatite,MHA)和氨基修饰碳点(N-CDs)得到了MHA/N-CDs复合结构。利用XRD、FTIR和HRTEM的表征,证实了N-CDs成功嫁接到MHA表面。N2吸附-脱附和TEM的分析指出,MHA的介孔孔径为5 nm左右,且存在一定量的大孔结构。在可见光下催化降解亚甲基兰结果表明,复合体系的光催化能力大幅提高,约是N-CDs的两倍。

The Mesoporous Hydroxyapatite（ MHA） and amine-functionalized carbon dots（ N-CDs） were combined by ionic bonding under the chemical reaction,resulting in a new composite,i. e. MHA / NCDs. XRD,IR-spectra and HRTEM revealed that N-CDs were successfully coupled with MHA. The results of Nitrogen adsorption-desorption and TEM suggest that the mesopore size of MHA was about 5nm. Meanwhile,a certain amount of macropores existed. More importantly,the high photocatalytic activity of the MHA / N-CDs composite was observed upon the degradation of methylene blue（ MB） under visible-light irradiation,which was almost two times of N-CDs.