Effects of adsorbed polyaniline on redox process on MoO3 surface

• Published in: Journal of colloid and interface science Vol. 212; no. 1; pp. 123 - 129
• Main Authors: DE FARIAS, R. F, DE SOUZA, J. M, DE MELO, J. V, AIROLDI, C
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier 01-04-1999
• Subjects: Applied sciences; Chemistry; Exact sciences and technology; General and physical chemistry; Organic polymers; Physicochemistry of polymers; Properties and characterization; Solid-liquid interface; Surface physical chemistry; Liquid solid adsorption; Organic adsorbate; Solid solid interface; Metallic adsorbent; Molybdenum oxide; Redox system; Aniline polymer
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1006/jcis.1998.6002

The effects exhibited by adsorbed conducting polyaniline on the redox process on a molybdenum oxide surface were studied. Thermogravimetric results indicate a 4% polyaniline deposition. Cyclic voltammograms of the adsorbed polymer on MoO3 show that polyaniline exerts remarkable effects on the molybdenum blue oxidation-reduction process, with oxidation and reduction potentials of 0.33 and 0.18 V, respectively. This effect strongly enhances the electrode response, and can be used as an important tool in qualitative and/or quantitative determinations of molybdenum in solution as well as in any substrate. Copyright 1999 Academic Press.