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以聚丙烯酸为修饰剂,采用水热法合成YVO4:Eu荧光纳米粒子.实验考察了聚丙烯酸加入量、溶液pH值、反应温度等条件对粒子荧光性能的影响.在优化的条件下,合成粒子的荧光强度大,水溶性良好、溶液均匀稳定.对合成粒子进行了表征,红外光谱实验表明,粒子表面包覆了聚丙烯酸;XRD实验表明,制备了单一相YVO4晶体;TEM测试表明合成粒子分散性较好,粒度均匀,粒径在25 nm左右.以合成稀土粒子为能量供体,孔雀石绿为能量受体,建立了荧光共振能量转移体系.基于以上体系,实现了对孔雀石绿的定量检测.方法的线性范围为5.00×10-5～5.00×10-3 g·L-1,检出限为2.0×10-5 g·L-1.
The polyacrylic acid was used as a modifier to synthesize YVO4: Eu fluorescent nanoparticles by hydrothermal method.The effects of the amount of polyacrylic acid added, the pH value of the solution and the reaction temperature on the fluorescence properties of the particles were investigated experimentally.Under the optimal conditions, The results of FTIR spectra showed that the particle surface was coated with polyacrylic acid. XRD results showed that YVO4 crystal with single phase was prepared. The TEM test showed that the synthesized particles were dispersed And the particle size is about 25 nm.The fluorescence resonance energy transfer system was established by synthesizing rare earth particles as energy donor and malachite green as energy acceptor.Based on the above system, The linear range of the method was 5.00 × 10-5 ~ 5.00 × 10-3 g · L-1 with the detection limit of 2.0 × 10-5 g · L-1.