P2EC.25 - Conducting polyaniline/reduced graphene oxide-modified carbon paste electrode for the electrochemical multidetection of ascorbic acid and uric acid
- Event
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria - Chapter
- P-2 - Electrochemical Sensors
- Author(s)
- J. Baricaua, J. Balitaan - Department of Chemistry, College of Science, University of Santo Tomas (Philippines), K. Santiago - Research Center for the Natural and Applied Sciences, University of Santo Tomas (Philippines)
- Pages
- 745 - 746
- DOI
- 10.5162/IMCS2018/P2EC.25
- ISBN
- 978-3-9816876-9-9
- Price
- free
Abstract
This study presents a simultaneous electrochemical detection of ascorbic acid (AA) and uric acid (UA) using fabricated polyaniline/reduced graphene oxide-modified carbon paste electrode (PANI/rGOmCPE). PANI/rGO was synthesized via in situ chemical polymerization route, and characterized using FTIR, SEM, and 4-point conductivity probe. The sensor’s performance was evaluated towards standard solutions of AA and UA. FTIR and conductivity studies proved that PANI/rGO composite was successfully synthesized. The FTIR spectrum of PANI/rGO shows the characteristic peaks of PANI: 3300-3500 cm-1 (amine N-H bonds); 1400-1750 (aromatic rings). Combining PANI and rGO provided enhanced conductivity and surface area as compared to pristine PANI and rGO. Voltammetric studies showed direct proportional relationship between anodic peak current against analyte concentration. Based on voltammetric studies, the redox capability of synthesized electrodes was found to show an increasing trend of CPE < PANI-mCPE < PANI/rGO-mCPE. Among the three tested electrodes, the fabricated PANI/rGO-mCPE exhibited the best performance for the multi-detection of AA and UA.