Highly Sensitive Detection of Strontium Ions Using Metal-Organic Frameworks Functionalized Solid-State Nanochannels

Authors

• Xu-Gang Wang, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
• Zheng-Xu He, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
• De-Fang Ding, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
• Xue-Qin Luo, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
• Li Dai, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
• Wei-Qi Zhang, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China
• Qun Ma, Department of Chemical Engineering, Graduate School of Engineering, Osaka Metropolitan University, Sakai, Osaka599-8570, Japan
• Yu Huang, State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. ChinaFollow
• Fan Xia, a State Key Laboratory of Biogeology and Environmental Geology, Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, P. R. China; c Shenzhen Research Institute of China University of Geosciences, Shenzhen 518052, Guangdong, PR China

Corresponding Author

Yu Huang(yuhuang@cug.edu.cn)

Abstract

Strontium-90, a highly radioactive isotope, accumulates within the food chain and skeletal structure, posing significant risks to human health. There is a critical need for a sensitive detection strategy for Strontium-90 in complex environmental samples. Here, solid-state nanochannels, modified with metal-organic frameworks (MOF) and specific aptamers, were engineered for highly sensitive detection of strontium ion (Sr²⁺). The synergistic effect between the reduced effective diameter of the nanochannels due to MOF and the specific binding of Sr²⁺ by aptamers amplifies the difference in ionic current signals, enhancing detection sensitivity significantly. The MOF-modified nanochannels exhibit highly sensitive detection of Sr²⁺, with a limit of detection (LOD) being 0.03 nmol·L^–1, whereas the LOD for anodized aluminum oxide (AAO) without the modified MOF nanosheets is only 1000 nmol·L^–1. These findings indicate that the LOD of Sr²⁺ detected by the MOF-modified nanochannels is approximately 33,000 times higher than that by the nanochannels without MOF modification. Additionally, the highly reliable detection of Sr²⁺ in various water samples was achieved, with a recovery rate ranging from 94.00% to 118.70%. This study provides valuable insights into the rapidly advancing field of advanced nanochannel-based sensors and their diverse applications for analyzing complex samples, including environmental contaminant detection, food analysis, medical diagnostics, and more.

Graphical Abstract

Keywords

Nanochannel, MOF, Sensor, Strontium ion, Sensitivity Detection

DOI Link

https://doi.org/10.61558/2993-074X.3482

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Publication Date

2024-10-28

Online Available Date

2024-07-23

Revised Date

2024-05-18

Received Date

2024-04-30

Recommended Citation

Xu-Gang Wang, Zheng-Xu He, De-Fang Ding, Xue-Qin Luo, Li Dai, Wei-Qi Zhang, Qun Ma, Yu Huang, Fan Xia. Highly Sensitive Detection of Strontium Ions Using Metal-Organic Frameworks Functionalized Solid-State Nanochannels[J]. Journal of Electrochemistry, 2024, 30(10): 2414003.
DOI: 10.61558/2993-074X.3482
Available at: https://jelectrochem.xmu.edu.cn/journal/vol30/iss10/3