化工进展 ›› 2023, Vol. 42 ›› Issue (8): 4143-4152.DOI: 10.16085/j.issn.1000-6613.2023-0345

• 专栏:化学产品工程 • 上一篇    下一篇

Hg2+响应型智能凝胶检测光栅的构建与性能

张婷婷1(), 潘大伟1,2, 巨晓洁1,2, 刘壮1,2, 谢锐1,2, 汪伟1,2(), 褚良银1,2   

  1. 1.四川大学化学工程学院,四川 成都 610065
    2.四川大学高分子材料工程国家重点实验室,四川 成都 610065
  • 收稿日期:2023-03-06 修回日期:2023-04-27 出版日期:2023-08-15 发布日期:2023-09-19
  • 通讯作者: 汪伟
  • 作者简介:张婷婷(1997—),女,硕士研究生,研究方向为功能聚合物材料。E-mail:tingtingzhang971@163.com
  • 基金资助:
    国家自然科学基金(21991101)

Fabrication and performance of Hg2+-responsive smart hydrogel grating detector

ZHANG Tingting1(), PAN Dawei1,2, JU Xiaojie1,2, LIU Zhuang1,2, XIE Rui1,2, WANG Wei1,2(), CHU Liangyin1,2   

  1. 1.School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
    2.State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, Sichuan, China
  • Received:2023-03-06 Revised:2023-04-27 Online:2023-08-15 Published:2023-09-19
  • Contact: WANG Wei

摘要:

高灵敏度、高选择性检测水中Hg2+对于人类健康和环境生态可持续发展具有重要意义。本文基于硫脲基团与Hg2+的选择性强螯合作用来调控光栅微结构和实现信号转化,构建了用于高灵敏、高选择性便捷检测水中痕量Hg2+的智能凝胶光栅。该凝胶光栅的交联高分子网络结构中具有硫脲基团,可高选择性地与Hg2+进行强螯合,从而诱导光栅起伏高度发生变化,实现由水中Hg2+浓度到衍射光强度的信号变化。通过利用该智能凝胶光栅构建光学检测系统来便捷检测衍射光强度变化,可高灵敏、高选择性地检测水中浓度低至10-9mol/L的Hg2+。相关工作为面向水中痕量Hg2+的便捷灵敏检测技术的开发提供了新途径。

关键词: 智能凝胶, 光栅, 汞离子, 螯合作用

Abstract:

Highly sensitive and selective detection of Hg2+ in water is of great significance for human health and eco-environmental sustainability. In this work, based on microstructure adjustment and signal conversion via selective and strong chelation between thiourea groups and Hg2+, a Hg2+-responsive smart hydrogel grating was created for ultrasensitive, highly-selective and facile detection of trace Hg2+ in water. In the crosslinked polymeric networks of the hydrogel grating, the thiourea groups can selectively chelate with Hg2+ to induce the height change of the hydrogel grating, thus realizing the signal conversion from concentration change of Hg2+ to intensity change of diffracted light. By integrating the hydrogel grating into an optical detection system to conveniently detect the intensity changes of diffracted light, ultrasensitive and highly-selective detection of Hg2+ with concentration as low as 10-9 mol/L in water can be achieved. This work provided a new strategy for development of convenient and sensitive detection technique for trace Hg2+ in water.

Key words: smart hydrogel, grating, mercury (Ⅱ) ion, chelation

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