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Highly sensitive volatile organic compounds vapour measurements using a long period grating optical fibre sensor coated with metal organic framework ZIF-8

Hromadka, Jiri; Tokay, Begum; Correia, Ricardo; Morgan, Stephen P.; Korposh, Sergiy

Highly sensitive volatile organic compounds vapour measurements using a long period grating optical fibre sensor coated with metal organic framework ZIF-8 Thumbnail


Authors

Jiri Hromadka

BEGUM PEISSEL BEGUM.TOKAY@NOTTINGHAM.AC.UK
Professor of Chemical Engineering

Profile image of SERHIY KORPOSH

SERHIY KORPOSH S.Korposh@nottingham.ac.uk
Professor of Photonics Instrumentation



Abstract

An optical fibre long period grating (LPG) based volatile organic compound (VOC) sensor coated with ZIF-8, a material from the zeolite imidazolate framework (ZIF) family, functional coating is presented. ZIF-8 film was deposited onto the surface of the LPG using an in-situ crystallization technique by mixing freshly prepared 12.5 mM zinc nitrate hexahydrate and 25 mM 2-metyl-imidazole solutions in methanol. A concentration specific response to acetone, ethanol and methanol vapour was obtained over the high concentration range up to tens thousands ppm. The LPG based sensor works at phase-matching turning point (PMTP) and such operates at the highest sensitivity. A novel approach for the data analysis based on the measurement of the bandwidth of the U-shaped attenuation band of the LPG is introduced. The optimized sensor shows a sensitivity of 0.015 ± 0.001 and 0.018 ± 0.0015 nm/ppm and limit of detection (LOD) of 6.67 and 5.56 ppm for acetone and ethanol respectively.

Citation

Hromadka, J., Tokay, B., Correia, R., Morgan, S. P., & Korposh, S. (2018). Highly sensitive volatile organic compounds vapour measurements using a long period grating optical fibre sensor coated with metal organic framework ZIF-8. Sensors and Actuators B: Chemical, 260, https://doi.org/10.1016/j.snb.2018.01.015

Journal Article Type Article
Acceptance Date Jan 2, 2018
Online Publication Date Jan 3, 2018
Publication Date May 1, 2018
Deposit Date Feb 6, 2018
Publicly Available Date Feb 6, 2018
Journal Sensors and Actuators B: Chemical
Print ISSN 0925-4005
Electronic ISSN 1873-3077
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 260
DOI https://doi.org/10.1016/j.snb.2018.01.015
Keywords Long period grating (LPG); Metal organic framework (MOF); ZIF-8; Volatile organic compounds (VOCs) sensor; Ethanol; Methanol; Acetone
Public URL https://nottingham-repository.worktribe.com/output/930704
Publisher URL https://doi.org/10.1016/j.snb.2018.01.015
Contract Date Feb 6, 2018

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