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Effects of Adsorbed Polyaniline on Redox Process on MoO3 Surface
de Farias RF1, de Souza JM, de Melo JV
1Departamento de Química, Universidade Federal de Roraima, 69310-270 Boa Vista, Roraima, Brasil
Journal of Colloid and Interface Science
|March 11, 1999
Summary
Adsorbed conducting polyaniline significantly enhances molybdenum oxide
Area of Science:
- Electrochemistry
- Materials Science
Background:
- Molybdenum oxide (MoO3) exhibits redox properties.
- Conducting polymers can modify electrode surfaces.
Purpose of the Study:
- To investigate the impact of adsorbed polyaniline on the redox behavior of molybdenum oxide.
- To explore potential applications in molybdenum detection.
Main Methods:
- Thermogravimetric analysis (TGA) for polymer deposition quantification.
- Cyclic voltammetry (CV) to study redox processes.
Main Results:
- Thermogravimetric analysis confirmed a 4% polyaniline deposition.
- Polyaniline adsorption altered molybdenum blue redox potentials to 0.33 V (oxidation) and 0.18 V (reduction).
- Enhanced electrode response observed due to polyaniline modification.
Conclusions:
- Adsorbed polyaniline significantly influences the redox processes of molybdenum oxide.
- The modified electrode shows promise for sensitive qualitative and quantitative analysis of molybdenum.
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