基于 Au NPs/3DOM TiO 光子晶体电极的高灵敏和选择性适体电化学生物传感器用于检测阿特拉津。
A highly sensitive and selective photoelectrochemical aptasensor for atrazine based on Au NPs/3DOM TiO photonic crystal electrode.
机构信息
School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China.
School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China; The Instrumental Analysis Center, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
出版信息
J Hazard Mater. 2023 Jun 5;451:131132. doi: 10.1016/j.jhazmat.2023.131132. Epub 2023 Mar 6.
A photoelectrochemical (PEC) sensing platform with high sensitivity and selectivity has been fabricated based on Au nanoparticles (Au NPs) modified three dimensionally ordered macroporous (3DOM) TiO nanostructure frame for trace detection of an endocrine disrupting pesticide, atrazine (ATZ). The resultant photoanode (Au NPs/3DOM TiO) shows enhanced PEC performance under visible light due to multi signal amplification of the unique structure of 3DOM TiO and surface plasmon resonance (SPR) of Au NPs. ATZ aptamers are used as recognition elements and immobilized on Au NPs/3DOM TiO by Au-S bond in large packing density and dominant spatial orientation. The specific recognition and high binding affinity between aptamer and ATZ provides the PEC aptasensor with excellent sensitivity. The detection limit is 0.167 ng/L. Besides, this PEC aptasensor exhibits outstanding anti-interference ability in 100-fold concentration of other endocrine disrupting compounds and has been applied successfully to analyze ATZ in real water samples. A simple but efficient PEC aptasensing platform has therefore been successfully developed with high sensitivity, selectivity and repeatability for pollutant monitoring and potential risk evaluation in the environment with great application prospect.
一种基于金纳米粒子（Au NPs）修饰的三维有序大孔（3DOM）TiO2 纳米结构框架的光电化学（PEC）传感平台，具有高灵敏度和选择性，已被用于痕量检测内分泌干扰农药莠去津（ATZ）。由于 3DOM TiO2 的独特结构和 Au NPs 的表面等离子体共振（SPR）的多重信号放大，所得光电阳极（Au NPs/3DOM TiO）在可见光下表现出增强的 PEC 性能。莠去津适配体被用作识别元件，并通过 Au-S 键以大的堆积密度和主导的空间取向固定在 Au NPs/3DOM TiO 上。适配体与 ATZ 之间的特异性识别和高结合亲和力为 PEC 适体传感器提供了优异的灵敏度。检测限为 0.167 ng/L。此外，该 PEC 适体传感器在 100 倍浓度的其他内分泌干扰化合物存在下表现出出色的抗干扰能力，并已成功应用于实际水样中莠去津的分析。因此，成功开发了一种简单但高效的 PEC 适体传感平台，具有高灵敏度、选择性和重复性，可用于环境中污染物的监测和潜在风险评估，具有广阔的应用前景。
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