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. China
Fan Xia, 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; Shenzhen Research Institute of China University of Geosciences
Corresponding Author(s)
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 Sr2+ detection. 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 detection limit (LOD) of 0.03 nM, whereas the LOD for AAOs without the modified MOF nanosheets is only 1000 nM. These findings indicate that the LOD of Sr2+ detected by MOF-modified nanochannels is approximately 33,000 times higher than that of the nanochannels without MOF modification. Additionally, 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
Nanochannels; MOF; Sensor; Sr2+; Sensitivity Detection
DOI
10.61558/2993-074X.3482
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, doi: 10.61558/2993-074X.3482.
