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A mesoporous fluorescent sensor based on ZnO nanorods for the fluorescent detection and selective recognition of tetracycline

机译：基于ZnO纳米棒的介孔荧光传感器用于四环素的荧光检测和选择性识别

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Due to tetracycline (TC) being harmful to the environment and animals, versatile fluorescent sensors have been developed and applied for the specific recognition and determination of TC. In the present paper, a mesoporous fluorescent sensor was successfully prepared by using TC as the template, cetyl trimethyl ammonium bromide (CTAB) as the porogen, and ZnO nanorods (NRs) as the core substrate material and optical material. The synthesized composite materials were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Fluorescent measurements of the target TC were then measured by a spectrofluorometer. Under optimal conditions, the linear range and correlation coefficient of the mesoporous MIPs-ZnO NRs were 2.0-120 mmol L-1 and 0.9993, respectively, and the imprinting factor (IF) was up to 3.50. Moreover, in order to further investigate the effect of the mesoporous structure, a fluorescent sensor without a mesoporous structure was synthesized as a comparison and measured by the same processes. Through analysis of the data, it was found that the mesoporous fluorescent sensor showed a lower response time, higher utilization, and higher selective recognition and sensitive determination than the non-mesoporous fluorescent sensor. This study provides a novel strategy to fabricate mesoporous-imprinted polymer layer-coated ZnO NRs with excellent fluorescent performance for TC.
机译：由于四环素（TC）对环境和动物有害，因此开发了多功能荧光传感器并将其应用于TC的特定识别和确定。本文以TC为模板，十六烷基三甲基溴化铵（CTAB）为致孔剂，ZnO纳米棒（NRs）为核心基板材料和光学材料，成功制备了介孔荧光传感器。通过透射电子显微镜（TEM）和X射线衍射（XRD）对合成的复合材料进行了表征。然后通过分光荧光计测量目标TC的荧光测量。在最佳条件下，介孔MIPs-ZnO NRs的线性范围和相关系数分别为2.0-120 mmol L-1和0.9993，印迹因子（IF）高达3.50。此外，为了进一步研究中孔结构的效果，合成了不具有中孔结构的荧光传感器作为比较，并通过相同的方法进行了测量。通过数据分析，发现中孔型荧光传感器比非中孔型荧光传感器响应时间短，利用率高，选择性识别和敏感度高。这项研究提供了一种新颖的策略来制备具有优异的TC荧光性能的介孔印迹聚合物层包覆的ZnO NR。

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