紫外光诱导法合成纳米银/羟基磷灰石及其性能研究

Preparation of silver nanoparticle/hydroxyapatite by ultraviolet irradiation method and study on its properties

以羧甲基纤维素钠(CMC)为模板剂,采用紫外光诱导制备了羟基磷灰石(HAP)负载银纳米颗粒(AgNPs)的复合光催化剂(Ag/HAP)。通过X射线粉末衍射仪、扫描电镜、紫外-可见光吸收光谱仪、X射线光电子能谱仪等对其化学组成、形貌结构和光学性能等进行表征。结果表明,CMC作为模板剂不仅在紫外光诱导下将Ag^(+)还原为Ag^(0),还对载体HAP的形貌、粒径起到调控作用。在甲基橙光催化降解试验中,当Ag的质量分数为1%时,降解率最高达98.31%,银纳米颗粒和HAP两者间的协同作用有效地提高了光催化性能。

Ag/HAP,a composite photocatalyst, is prepared by loading silver nanoparticles(AgNPs) on hydroxyapatite(HAP) through ultraviolet light induction method with sodium carboxymethyl cellulose(CMC) as template.Its chemical composition, morphology and optical properties are characterized by means of XRD,SEM,UV-Vis and XPS.The results show that CMC,as a template, reduces Agto Ag^(0) under ultraviolet induction, and also controls the morphology and particle size of HAP.In the photocatalytic degradation of methyl orange over Ag/HAP,the degradation rate is up to 98.31% when Ag content in the catalyst is 1%.The synergistic effect between silver nanoparticles and HAP can effectively improve the photocatalytic performance.