Key Lab of Ecological Restoration in Hilly Areas, School of Chemical & Environmental Engineering, Pingdingshan University, Pingdingshan 467000, China.
Guangzhou Key Laboratory of Analytical Chemistry for Biomedicine, School of Chemistry, South China Normal University, Guangzhou 510006, China.
Molecules. 2022 Jul 11;27(14):4431. doi: 10.3390/molecules27144431.
The presence of nitrite (NO) in water and food leads to serious problems in public health and the environment. Therefore, it is important to develop a rapid and efficient method for the selective detection of NO. In this work, the synthesis and characterization of magnetic FeO@SiO-TbDPA nanoprobe have been carried out. The FeO@SiO-TbDPA aqueous solution exhibits a strong green emission. Due to the addition of various concentrations of NO (0-100 μM), the fluorescence intensity has been suppressed. The nanoprobe FeO@SiO-TbDPA exhibits excellent selectivity and sensitivity toward NO ions. Excellent linearity is obtained in the range of 5-80 μM with a detection limit of 1.03 μM. Furthermore, the presence of magnetic FeO nanoparticles in FeO@SiO-TbDPA nanospheres will also facilitate the effective separation of FeO@SiO-TbDPA from the aqueous solution. Our proposed strategy is expected to fabricate an organic-inorganic hybrid magnetic nanomaterial and can be used as an efficient sensor. It has been shown that this new strategy has numerous advantages, such as high stability, selectivity, and simplicity of operation. It demonstrates great potential for simple and convenient NO detection. It may expand to a variety of ranges in environmental monitoring and biomedical fields.
水中和食物中亚硝酸盐（NO）的存在会导致公共卫生和环境方面的严重问题。因此，开发一种快速高效的选择性检测 NO 的方法非常重要。在这项工作中，合成并表征了磁性 FeO@SiO-TbDPA 纳米探针。FeO@SiO-TbDPA 水溶液表现出强烈的绿色发射。由于加入了各种浓度的 NO（0-100 μM），荧光强度被抑制。纳米探针 FeO@SiO-TbDPA 对 NO 离子表现出优异的选择性和灵敏度。在 5-80 μM 的范围内获得了良好的线性关系，检测限为 1.03 μM。此外，FeO@SiO-TbDPA 纳米球中磁性 FeO 纳米粒子的存在也将促进 FeO@SiO-TbDPA 从水溶液中的有效分离。我们提出的策略有望制备出一种有机-无机杂化磁性纳米材料，并可用作高效传感器。结果表明，这种新策略具有高稳定性、选择性和操作简单等优点。它为简单方便地检测 NO 提供了巨大的潜力。它可能会扩展到环境监测和生物医学领域的各种范围。
