Highly Luminescent YVO4-Eu3+ Nanocrystals Coating on Wirelike Y(OH)3-Eu3+ and Y2O3-Eu3+ Microcrystals by Chemical Corrosion

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• 作者：Guohui Pan ; Hongwei Song ; Xue Bai ; Libo Fan ; Hongquan Yu ; Qilin Dai ; Biao Dong ; Ruifei Qin ; Suwen Li ; Shaozhe Lu ; Xinguang Ren ; Haifeng Zhao
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：August 23, 2007
• 年：2007
• 卷：111
• 期：33
• 页码：12472 - 12477
• 全文大小：194K
• 年卷期：v.111,no.33(August 23, 2007)
• ISSN：1932-7455

文摘

Highly luminescent YVO₄-Eu³⁺ nanocrystals (NCs) coating on wirelike Y(OH)₃-Eu³⁺ and Y₂O₃-Eu³⁺microcrystals were synthesized by a chemical corrosion method, that is, first preparation of Y(OH)₃-Eu³⁺wirelike microcrystals by a hydrothermal method, and subsequently chemical corrosion with NaVO₄ solutionsthrough a second hydrothermal treatment. The crystal structure, morphology, and optical properties of thecomposites were characterized and compared with those of the general nanoparticles (NPs) obtained by aone-step hydrothermal process. The results indicate that chemical corrosion method yields high-quality YVO₄-Eu³⁺ NCs in the composite grown from exterior to interior, compared with the directly hydrothermal NPsgrown from interior to exterior. In addition, luminescent intensity for YVO₄-Eu³⁺ in the composite wasremarkably increased compared with that of NPs, due to more efficient energy transfer from VO₄^3- to Eu³⁺ions, and was further increased up to level of the the bulk materials after being annealed at 500 C for 2 h.The local environment surrounding Eu³⁺ in the composite is more complex due to the presence of corrosiveinterface.