Miniature PH Sensor Based on Electropolymerized Polyaniline
DOI:
https://doi.org/10.26534/kimika.v17i1.19-25Keywords:
polyaniline, conducting polymer, BSA dopant, CV, SEM, XPSAbstract
A miniature pH sensor was fabricated by electrochemical polymerization using 0.10 M aniline monomer, 30 mg bovine serum albumin (BSA) dopant, 0.10 M tris(hydroxymethyl)-aminomethane at pH 7, 30-minute polymerization time without stirring, platinum wire support and 9.34 mA cm^2 current density as optimum conditions. It showed a sub-Nemstian response of -42.06 mV/pH+ 0.5, a linearity of -0.9985 and favorable response time of ~3 min for three replicates from pH 3 to pH 10 at room temperature. The sensor exhibited low hysteresis with Δm = 5.83 mV/pH, low drift with an RSD = ~<4%, high reproducibility with an RSD = ~<3% and lifetime of > 1.5 months. Furthermore, extensive electrochemical and surface studies was carried out via Cyclic Yoltammetry (CV), Scanning Electron Microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS).Downloads
How to Cite
Santiago, K. S., & Binag, C. A. (2001). Miniature PH Sensor Based on Electropolymerized Polyaniline. KIMIKA, 17(1), 19–25. https://doi.org/10.26534/kimika.v17i1.19-25
Issue
Section
Research Articles
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).