Zeolite-fiber Integrated Optical Chemical Sensors for Detection of Dissolved Organics in Water

Abstract

MFI zeolite coated optical fiber sensors have been developed for in situ detection of dissolved organics in water. The sensors operate by monitoring the optical reflectivity changes caused by the selective adsorption of organic molecules, i.e., 2-propanol or pentanoic acid in this study, from aqueous solutions in the zeolitic pores. Reversible and monotonic sensor signals were observed in response to the variation of 2-propanol concentration in water with fast response. However, the sensor exhibited a much slower response to pentanoic acid than to 2-propanol. It was also found that substitution of Si by Al in the MFI framework increased the adsorption of pentanoic acid that resulted in enhanced sensor responses.

Department(s)

Electrical and Computer Engineering

Sponsor(s)

Sandia Laboratories
United States. Department of Energy

Keywords and Phrases

Optical Fiber Sensors; Organic Molecules; Optical fiber detectors; Zeolites

International Standard Serial Number (ISSN)

0743-7463

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2005 American Chemical Society (ACS), All rights reserved.

Publication Date

01 Jan 2005

Link to Full Text

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