本文關(guān)鍵詞： 磷酸釓 超聲法 納米材料 發(fā)光性能　出處：《貴州大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：稀土納米發(fā)光材料因稀土離子具有獨(dú)特的電子結(jié)構(gòu)和躍遷模式而表現(xiàn)出許多優(yōu)異的性能,已被廣泛應(yīng)用于光電子器件、信息顯示、人類醫(yī)療健康等領(lǐng)域。稀土納米發(fā)光材料作為新一代的發(fā)光材料,成為了國(guó)內(nèi)外的熱點(diǎn)研究課題之一。超聲法因具有操作簡(jiǎn)單及能在短時(shí)間、低溫下合成純度高、粒度細(xì)、分布均勻的材料等優(yōu)點(diǎn),開(kāi)始受到了關(guān)注。本論文采用超聲法合成了以磷酸釓為基質(zhì)摻雜銪和鋱的納米發(fā)光材料,通過(guò)XRD、SEM、IR及PL等測(cè)試方法對(duì)樣品的晶型、形貌及發(fā)光性能進(jìn)行了表征與分析,主要探討了摻雜離子濃度、溶液pH值、煅燒溫度、加入配合劑檸檬酸和甘氨酸等因素對(duì)其形貌、晶型及發(fā)光性能的影響,也進(jìn)一步探究了其結(jié)構(gòu)、形貌與性能之間的相互關(guān)系。主要內(nèi)容包括:1、采用超聲法合成的GdPO4:Eu納米發(fā)光材料,在pH=2時(shí)樣品為納米棒狀結(jié)構(gòu),樣品的結(jié)晶度很好,而在pH=10時(shí)樣品為類似球狀的納米顆粒,且結(jié)晶度較低。pH值為10時(shí)的發(fā)光強(qiáng)度比pH值為2時(shí)的發(fā)光強(qiáng)度大。經(jīng)過(guò)高溫煅燒后的樣品,失去結(jié)晶水,由六方晶系變成單斜晶系,并且發(fā)光強(qiáng)度增加,在1000℃煅燒下的樣品的發(fā)光強(qiáng)度大于800℃下煅燒的樣品。2、采用超聲法合成了GdPO4:Tb納米發(fā)光材料,在pH=2時(shí)樣品為納米棒狀結(jié)構(gòu),樣品的結(jié)晶度很好,而在pH=10時(shí)樣品為類似球狀的納米顆粒,且結(jié)晶度較低。pH值為10時(shí)的發(fā)光強(qiáng)度比pH值為2時(shí)的發(fā)光強(qiáng)度大。在加入甘氨酸后,由于配合物的形成,有利于GdPO4晶體的生長(zhǎng),樣品的發(fā)光強(qiáng)度增加。3、采用超聲法合成了GdPO4:(Ce,Tb)納米發(fā)光材料,加入檸檬酸影響了產(chǎn)品的形貌,隨著檸檬酸量的增大,樣品顆粒的長(zhǎng)度逐漸減小,顆粒的寬度逐漸增大,并且在檸檬酸與釓離子物質(zhì)的量之比為2:1時(shí),樣品結(jié)晶度較好、顆粒較大,發(fā)光效果最好。
[Abstract]:Due to the unique electronic structure and transition mode of rare earth ions, rare earth nano-luminescent materials have been widely used in optoelectronic devices, information display. As a new generation of luminescent materials, rare earth nano-luminescent materials have become one of the hot research topics at home and abroad. Ultrasonic method is easy to operate and can be used in a short time. At low temperature, the advantages of high purity, fine particle size and uniform distribution of materials have been paid attention to. In this paper, we synthesized the luminescent materials doped with europium and terbium with gadolinium phosphate as substrate by XRD. The crystal shape, morphology and luminescence properties of the samples were characterized and analyzed by SEM IR and PL. The concentration of doped ions, pH value of solution and calcination temperature were discussed. The effects of citric acid and glycine on the morphology, crystal structure and luminescence properties were also investigated. The relationship among the structure, morphology and properties was also investigated. The main contents include: 1. The nanocrystalline GdPO4:Eu luminescent materials synthesized by ultrasonic method were nanorods at pH = 2:00, and the crystallinity of the samples was very good, while at pH = 10:00 the samples were spherical like nanoparticles. The luminescence intensity of the sample with lower crystallinity and pH value of 10:00 is higher than that of the sample with pH value 2:00. The sample calcined at high temperature loses the crystalline water and changes from hexagonal system to monoclinic system. The luminescence intensity of the sample calcined at 1000 鈩，

本文編號(hào)：1464131