Dual-mode fluorescent and colorimetric sensing of thiourea and aluminum ion in natural water based on CuO nanoparticles

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchimica Acta Pub Date : 2024-10-14 DOI:10.1007/s00604-024-06758-7

Yao Jin, Wenhui Ai, Ge Chen, Guodong Zhang, Fang Wang, Ting Zhou, Zhiqing Zhang, Xiufeng Wang

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Abstract

CuO nanoparticles with good water solubility and uniform particle size were successfully prepared. Interestingly, the oxidase-like activity of CuO NPs was continuously enhanced by the addition of thiourea (TU), and the enzyme activity was further enhanced by the addition of aluminum ion (Al³⁺). By systematically exploring and optimizing the experimental conditions, including the key parameters such as temperature, reaction time, and pH, a fluorescence-colorimetric dual-mode sensing system based on CuO nanoparticles was constructed. The detection range of TU and Al³⁺ were 1-100 µM and 1-100 µM, respectively, and the selectivity and precision of detection were further improved. In addition, the catalytic mechanism of CuO NPs as oxidase-like catalysts and the specific process in the reaction were investigated. Finally, the nano-sensing system was successfully applied to the analysis of three real environmental samples, namely, tap water, lake water and river water, which provided an effective new strategy for the future development of nano-sensing technology for TU and Al³⁺.

Graphical Abstract

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基于 CuO 纳米粒子的天然水中硫脲和铝离子双模式荧光比色传感技术

成功制备了具有良好水溶性和均匀粒径的 CuO 纳米粒子。有趣的是，加入硫脲（TU）后，CuO NPs 的氧化酶样活性持续增强，加入铝离子（Al3+）后，酶活性进一步增强。通过系统地探索和优化实验条件，包括温度、反应时间和 pH 值等关键参数，构建了基于 CuO 纳米粒子的荧光比色双模式传感系统。TU和Al3+的检测范围分别为1-100 µM和1-100 µM，检测的选择性和精确度进一步提高。此外，还研究了 CuO NPs 作为氧化酶类催化剂的催化机理和反应的具体过程。最后，该纳米传感系统被成功应用于自来水、湖水和河水这三种真实环境样品的分析，为今后TU和Al3+纳米传感技术的发展提供了有效的新策略。

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.