CAJ | 학술논문

采用低温水热法通过控制 Eu3＋的掺杂浓度合成了 YPO 4和 YPO 4??0．8H 2 O 两种结构的晶体粉末.所得样品的结构、形貌和发光性能通过 X 射线衍射(XRD),场发射扫描电子显微镜(FE-SEM)和荧光光谱仪(PL)进行了表征.结果表明,随着 Eu3＋掺杂量的增加,YPO4的结构发生了改变,当掺杂量达到13％时,晶相由四方相 YPO4变为六方相 YPO4??0．8H2 O,形貌从不规则的片状变为细棒状.六方相的 YPO4??0．8H2 O∶Eu3＋发光性能弱于四方相 YPO 4∶Eu3＋,但通过后期200℃煅烧处理,失去了结构水的 YPO 4??0．8H 2 O 的发光强度较直接制备无结构水的 YPO 4有了大幅度提高.
채용저온수열법통과공제 Eu3＋적참잡농도합성료 YPO 4화 YPO 4??0．8H 2 O 량충결구적정체분말.소득양품적결구、형모화발광성능통과 X 사선연사(XRD),장발사소묘전자현미경(FE-SEM)화형광광보의(PL)진행료표정.결과표명,수착 Eu3＋참잡량적증가,YPO4적결구발생료개변,당참잡량체도13％시,정상유사방상 YPO4변위륙방상 YPO4??0．8H2 O,형모종불규칙적편상변위세봉상.륙방상적 YPO4??0．8H2 O∶Eu3＋발광성능약우사방상 YPO 4∶Eu3＋,단통과후기200℃단소처리,실거료결구수적 YPO 4??0．8H 2 O 적발광강도교직접제비무결구수적 YPO 4유료대폭도제고.
Eu3 +-doped YPO 4 and YPO 4 ??0.8H 2 O nano-and micro-crystals were synthesized via low-temperature hydrothermal process by adjusting the doped concentration of Eu3 + .The structure,morphology and lumines-cence property of the as-prepared samples were characterized by the X-ray power diffraction (XRD),field emis-sion-scanning electron microscope (FE-SEM)and photoluminescence (PL).The experimental results indicate that the phase structure of the as-prepared samples has been changed with the increasing of the concentration of the Eu3 + ions.When doping concentration of Eu3 + higher than 13%,the tetragonal phase of YPO 4 ∶Eu3 + has been completely transformed to the hexagonal phase of YPO 4 ??0.8H 2 O∶Eu3 + .The morphology of the crystal structure also changed from nanoparticles to bundle-like microstructures composed of nanorods.The lumines-cence intensities of YPO 4 ??0.8H 2 O ∶Eu3 + are lower than that of YPO 4 ∶Eu3 + synthesized by hydrothermal method.However,pure tetragonal phase of YPO 4 ∶Eu3 + powders were obtained when the powder of YPO 4 ??0.8H 2 O∶Eu3 + annealed at 200 ℃,and the luminescence intensities of YPO 4 ∶Eu3 + also have been greatly im-proved after loss crystallization water of YPO 4 ??0.8H 2 O∶Eu3 + .