Preparation of carbon monoxide sensor using electrospun heme-bound ployaniline nanofibers

Date

10-2010

Degree

Bachelor of Science in Chemistry

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Ernesto J. Del Rosario

Committee Member

Jose Rene L. Micor, Lou Serafin M. Lozada

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Abstract

Polyaniline (PAni) was synthesized via oxidative polymerization with ammonium peroxydisulfate and then dissolved in chloroform. The resulting solution was mixed with 600mg of polystyrene as binding agent. The mixture was electrospun at 20 kilovolts that resulted to nanofiber mats. The mats were attached to Wheatstone bridge circuit to

determine the change in voltage before and after exposure to carbon monoxide. CSA- doped PAni gave an average signal size of 11.64± 11.59 and a ΔV value of 0.0017±

0.0004 μvolts. Undoped PAni gave an average signal size of 13.4 ± 4.3and ΔV of 0.0015 ± 0.0002 μvolts. Heme was then bound to undoped PAni and gave a ΔV of 0.0012± 0.0004 μvolts and signal size of 1.20±0.34. The effect of varying concentration was determined by using five different concentration of CO produced which were adjusted using stoichiometric ratios of reactants. Undoped PAni and PAni – Heme gave a regression coefficient of 0.923 and 0.967 respectively. The effect of storage time was also determined for the PAni-Heme sensor that gave a percent difference of 20% for ΔV and 91% for average signal size.

Language

English

Location

UPLB College of Development Communication (CDC)

Call Number

LG 993.5 2010 C42 C47

Document Type

Thesis

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