Abstract
Carbon-based nanomaterials with carboxylation or chemical modification are widely used as electron-ion exchangers of solid electrodes. For reducing the complexity and dangerousness of the intermediate layer preparation, different original carbon-based nanomaterials are dispersed in deionized water. They are applied in the fabrication of Pb2+-selective electrodes. Because the contact angle of graphene reached 132.5°, the Pb2+-selective electrode of graphene used as an electron-ion exchanger showed excellent performance with a low detection limit of 3.4 × 10−8 M and a fast average response time of 42.6 s. The Nernstian response slope could reach 26.8 mV/decade, and the lifetime lasted for a month. Therefore, graphene suspension without any treatment can be used as the intermediate layer of solid-state electrodes, providing a reference for the preparation of other ion-selective electrodes.
Highlights
Heavy metals such as lead increasingly aggravate the pollution of ecosystems and the poisoning of organisms [1]
This study demonstrated that different carbon‐based nanomaterials can be applied in the fabrication of Pb2+‐selective electrodes
The Pb2+ -selective electrode of graphene used as an electron-ion exchanger showed excellent performance with a low detection limit of 3.4 × 10−8 M and a fast average response time of 42.6 s
Summary
Heavy metals such as lead increasingly aggravate the pollution of ecosystems and the poisoning of organisms [1]. The formation of a thin water film between the CPs and of CPs as an electron-ion exchanger improved the potential stability. Due to the good hydrophobicity and conductivity, carbon-based nanomaterials are widely exploited as electron-ion exchangers instead of CPs. Graphene (GR) (Figure S1a) is a two-dimensional crystal composed of closely packed carbon. Potentiometric electron-ion exchanger for theand determination flavoxate hydrochloride; the preparedsensor electrode little potential drift and good comparison with the electrode carbonshowed nanotube as stability innerintransducing layer exhibited without the graphene layer [25]. GR as an the electron‐ion exchanger forsolid the determination of f by comparing the properties of three electrodes with different carbon-based nanomaterials the prepared electrode showed little potential drift and good stab as the intermediate layer. The suspension strate electrode, followed by natural drying to form the electronmal solid Pb2+‐ISE was obtained by comparing the properties of t
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
