镉离子响应性凝胶光子晶体传感膜的构建

doi:10.3866/PKU.WHXB201610171

物理化学学报 >> 2016, Vol. 32 >> Issue (12): 2976-2982.doi: 10.3866/PKU.WHXB201610171

镉离子响应性凝胶光子晶体传感膜的构建

张晓栋,秦立彦,陈明清,刘士荣*()

江南大学化学与材料工程学院,食品胶体与生物技术教育部重点实验室,江苏无锡214122

收稿日期:2016-07-27 发布日期:2016-11-30
通讯作者: 刘士荣 E-mail:liushirong1961@163.com
基金资助:
国家自然科学基金(51173072)

Fabrication of a Responsive Hydrogel Photonic Crystal Sensing Film for Cadmium Ions

Xiao-Dong ZHANG,Li-Yan QIN,Ming-Qing CHEN,Shi-Rong LIU*()

The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, P. R. China

Received:2016-07-27 Published:2016-11-30
Contact: Shi-Rong LIU E-mail:liushirong1961@163.com
Supported by:
The project was supported by the National Natural Science Foundation of China(51173072)

摘要/Abstract

摘要：

将光子晶体与响应性水凝胶结合，采用“三明治”填充方法，以聚苯乙烯（PS）胶体晶体为模板，丙烯酰胺和烯丙基硫脲为单体制备得到一种对镉离子具有特异响应性的凝胶光子晶体传感膜，并对其进行了形貌表征和响应性研究。结果表明，该传感膜具有排列整齐的反蛋白石结构，可对不同浓度的Cd²⁺输出不同的光学信号。随着Cd²⁺浓度的增大，传感膜的Bragg衍射峰发生蓝移，并伴随有显著的颜色变化。在最优配比，适宜pH和离子强度条件下，衍射峰的最大位移值可达51.1 nm。在研究过程中发现其他干扰金属离子的存在不会影响传感膜对Cd²⁺的特异性响应，并且表现出了较快的响应速度。在多次循环实验中传感膜由于具备高度交联结构而表现出了良好的机械性和化学稳定性。该传感膜的构建为Cd²⁺的快速高效及裸眼可视检测提供了可能性。

关键词: 光子晶体, 水凝胶, 烯丙基硫脲, 镉离子, 蓝移, 裸眼

Abstract:

A hydrogel photonic crystal (HPC) film was fabricated for the specific detection of cadmium ions. This sensing film was based on a combination of a photonic crystal and a responsive hydrogel. It was fabricated using a "sandwich" filling method with a polystyrene (PS) colloidal crystal template, acrylamide (AM) and 1-allyl-2-thiourea (ATU) monomers. The morphology and responsivity were investigated in detail. The sensing film had an ordered, inverse opal structure and produced an optical signal in response to changes in the concentration of Cd²⁺. The Bragg diffraction peaks from the sensing film were blue shifted with increasing concentrations of Cd²⁺, and the color changes were visible to the naked eye. When the optimum ratio of monomers, suitable pH and ionic strength were used, the maximum displacement of the diffraction peak reached 51.1 nm. The presence of other interfering metal ions did not affect the specific response to Cd²⁺, and the sensing film exhibited a fast response rate. The cyclic tests showed that the sensing films had suitable mechanical and chemical stability because of their highly cross-linked structure. Importantly, these sensing films were allowed for high efficiency and rapid detection of Cd²⁺ by a color change that was visible to the naked eye.

Key words: Photonic crystal, Hydrogel, 1-Allyl-2-thiourea, Cadmium ion, Blue shift, Naked eye

张晓栋,秦立彦,陈明清,刘士荣. 镉离子响应性凝胶光子晶体传感膜的构建[J]. 物理化学学报, 2016, 32(12): 2976-2982.

Xiao-Dong ZHANG,Li-Yan QIN,Ming-Qing CHEN,Shi-Rong LIU. Fabrication of a Responsive Hydrogel Photonic Crystal Sensing Film for Cadmium Ions[J]. Acta Phys. -Chim. Sin., 2016, 32(12): 2976-2982.

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201610171

https://www.whxb.pku.edu.cn/CN/Y2016/V32/I12/2976

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镉离子响应性凝胶光子晶体传感膜的构建

Fabrication of a Responsive Hydrogel Photonic Crystal Sensing Film for Cadmium Ions

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