功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2014年
23期
23142-23146,23151
,共6页
殷海荣%赵高扬%乔荫颇%李思媛%高赛
慇海榮%趙高颺%喬蔭頗%李思媛%高賽
은해영%조고양%교음파%리사원%고새
羟基磷灰石%铕%发光光谱%荧光寿命%IR/IO
羥基燐灰石%銪%髮光光譜%熒光壽命%IR/IO
간기린회석%유%발광광보%형광수명%IR/IO
hydroxyapatite%europium%luminescent spectra%fluorescent lifetime%IR/IO
本文采用化学沉淀法制备了 Eu3+掺杂的羟基磷灰石材料(HAP∶xEu),使用 X 射线衍射、红外光谱以及荧光光谱等对其结构及发光特性进行了研究。分析表明,制备得到的掺杂羟基磷灰石具有晶态结构,其红外谱中出现隶属于 OH-、PO3-4的特征振动峰。光谱分析结果表明,在394 nm 波长激发下,掺杂Eu的羟基磷灰石样品的荧光发光强度和荧光寿命呈现随掺杂浓度的增加相反的变化趋势:发光强度增加6倍同时其荧光寿命却下降了约30%。此外,样品中电偶极跃迁与磁偶极跃迁强度之比(I R/I O )随 Eu3+掺杂浓度增加表明Eu占据羟基磷灰石晶格中的Ca Ⅱ不对称位点的比例大于占据Ca Ⅰ对称位点的比例,并可受到掺杂量的影响。
本文採用化學沉澱法製備瞭 Eu3+摻雜的羥基燐灰石材料(HAP∶xEu),使用 X 射線衍射、紅外光譜以及熒光光譜等對其結構及髮光特性進行瞭研究。分析錶明,製備得到的摻雜羥基燐灰石具有晶態結構,其紅外譜中齣現隸屬于 OH-、PO3-4的特徵振動峰。光譜分析結果錶明,在394 nm 波長激髮下,摻雜Eu的羥基燐灰石樣品的熒光髮光彊度和熒光壽命呈現隨摻雜濃度的增加相反的變化趨勢:髮光彊度增加6倍同時其熒光壽命卻下降瞭約30%。此外,樣品中電偶極躍遷與磁偶極躍遷彊度之比(I R/I O )隨 Eu3+摻雜濃度增加錶明Eu佔據羥基燐灰石晶格中的Ca Ⅱ不對稱位點的比例大于佔據Ca Ⅰ對稱位點的比例,併可受到摻雜量的影響。
본문채용화학침정법제비료 Eu3+참잡적간기린회석재료(HAP∶xEu),사용 X 사선연사、홍외광보이급형광광보등대기결구급발광특성진행료연구。분석표명,제비득도적참잡간기린회석구유정태결구,기홍외보중출현대속우 OH-、PO3-4적특정진동봉。광보분석결과표명,재394 nm 파장격발하,참잡Eu적간기린회석양품적형광발광강도화형광수명정현수참잡농도적증가상반적변화추세:발광강도증가6배동시기형광수명각하강료약30%。차외,양품중전우겁약천여자우겁약천강도지비(I R/I O )수 Eu3+참잡농도증가표명Eu점거간기린회석정격중적Ca Ⅱ불대칭위점적비례대우점거Ca Ⅰ대칭위점적비례,병가수도참잡량적영향。
A series of hydroxyapatite (HAP)particles doped with different content of europium (Eu3+)were de-signed and synthesized by a “one-pot”wet-chemical precipitation method and their structure,composition and luminescent property were characterized.XRD patterns and IR adsorption peaks showed the characteristic struc-ture and corresponding groups for Eu doped HAP samples.The typical emission peaks attributed to Eu ions were observed in emission spectra of HAP:xEu samples under excitation.The luminescent intensity of Eu doped samples enhanced with the rising Eu ions content.Meanwhile,the fluorescent lifetime of doped samples de-creased with the rising doped concentrations.Furthermore,the ratio of intensity between 617 and 595 nm corre-sponding to electric-dipole and magnetic-dipole (I R/I O )was also observed to increase with Eu ions content, which revealed the proportion of substitute type and site of Ca ions by Eu ions and was helpful to realize the substitute process and functional structure design.