|
| Preparation of an All-solid-state Selfsupported Pb2+ -selective Miniaturized Elec? trode Based on Disordered Mesoporous Car? bon |
| |
| View Full Text Download reader |
| DOI： |
| KeyWord:polymeric membrane ion-selective electrode ?miniaturized electrode ?disordered mesoporous carbon ?all-solid-state ?lead ion |
| Author | Institution |
| GAO Yang，DING Jia-wang，YIN Tan-ji，QIN Wei |
1. CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation，Shandong Key Laboratory of Coastal Environmental Processes，Yantai Institute of Coastal Zone Research，Chinese Academy of Sciences，Yantai ，China;2. Center for Ocean Mega-Science，Chinese Academy of Sciences，Qingdao ，China; 3. University of Chinese Academy of Sciences，Beijing ，China |
|
| Hits: 1262 |
| Download times: 488 |
| Abstract: |
| An all-solid-state self-supported Pb2+-selective miniaturized electrode（Pb2+－ISμE） based on disordered mesoporous carbon was fabricated by filling the disordered mesoporous carbon as the self-supporting material into a capillary glass tube with a tip diameter about 150 μm， and adsorbing the ion-selective polymeric membrane into the porous structure of disordered mesoporous carbon. The electrochemical behaviors of the proposed electrode were characterized by using cyclic voltammetry and electrochemical impedance spectroscopy， and the potentiometric performance of the Pb2+－ISμE was also investigated. Experiments results indicated that the disordered mesoporous carbon-based miniaturized electrode showed a typical "S" cyclic voltammogram and a large double-layer capacitance because of the porous structure， and the proposed Pb2+－ISμE exhibited a Nernstian potentiometric response in the linear range of 1.0 × 10－7－1.0 × 10－4 mol/L with a response slope of （28.9 ± 0.5） mV/dec and a detection limit of 4.0 × 10－8 mol/L. In addition， the proposed electrode showed excellent selectivity， stability and reproducibility， and was successfully applied in the determination of Pb2+ in pore water. This work provides a simple and convenient method for the preparation of the miniaturized electrodes， and is promising for the determination of ions in micro-environments or with micro/small volumes. |
| Close |