Back to Search
Start Over
All-solid-state potentiometric sensor using single-walled carbon nanohorns as transducer.
- Source :
-
Sensors & Actuators B: Chemical . Mar2019, Vol. 283, p284-289. 6p. - Publication Year :
- 2019
-
Abstract
- Highlights • Single-walled carbon nanohorns is used to prepare solid-state potentiometric sensor. • Single-walled carbon nanohorns could be acted as an ion-to-electron transducer. • The developed sensor exhibits fast response and outstanding potential stability. • This potentiometric sensor holds great promise for routine sensing application. Abstract Single-walled carbon nanohorns (SWCNHs) was utilized as an ion-to-electron transducer to fabricate all-solid-state ion-selective electrodes (ISE) for the first time. To evaluate the performance of developed SWCNHs-based calcium ISE, various electrochemical experiments were carried out. A Nernstian response (29.69 ± 0.24 mV/decade, R 2 = 0.9996) was acquired across a broad linear range between 10−6 and 10−2 M, and the detection limit of 10−6.1 M was achieved in the meantime. Additionally, water layer test and reversed chronopotentiometry were used to estimate the long-term and short-term stability of SWCNHs-based ISE, respectively, indicating SWCNHs is capable of enhancing potential stability on account of its hydrophobicity. Furthermore, a SWCNHs-based reference electrode (RE) was fabricated by directly coating a photo-polymerised reference membrane (RM) onto a SWCNHs modified electrode. Results demonstrated that the SWCNHs-based RE exhibited slight potential fluctuation for common ions with different charges over a wide concentration range of calibration. Based on these superior results, an integrated all-solid-state SWCNHs-based potentiometric sensing device combined SWCNHs-based ISE and SWCNHs-based RE was constructed for detecting calcium, which shows a Nernstian response with a slope of 27.14 mV/decade. This developed electrode in the aid of SWCNHs exhibits fast response as well as outstanding potential stability, making it extreme promising for routine sensing application. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POTENTIOMETRY
*TRANSDUCERS
*CHRONOAMPEROMETRY
*HYDROPHOBIC interactions
*CALCIUM
Subjects
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 283
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 134149324
- Full Text :
- https://doi.org/10.1016/j.snb.2018.12.040