Microwave gas sensor technology : developing graphene oxide-polyaniline nanocomposites for improved sensing and detection of ammonia gas
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Javadian Saraf, Aida
issued: 2021-09-22T22:18:01Z
issued: 2021
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Over the past decade, ammonia gas sensors have received significant attention as robust platforms for many applications, including emission control, food safety, and monitoring patients' exhaled breath for the early detection of metabolic disorders. Particularly, to diagnose diseases such as dysfunction of the kidney and the liver, ammonia gas is a key biomarker present in human breath. This thesis explores the development of a microwave-based split-ring resonator (SRR) sensor with enhanced sensitivity to detect ammonia gas at low concentrations. The sensor is based on a nanocomposite fabricated by incorporating carbon-based nanomaterial into polyaniline (PANI) via the in-situ polymerization of aniline monomers. The addition of carbon-based materials, as a substrate and dopant to PANI, results in high sensitivity for low concentrations of ammonia gas, in a 150-400 s time interval at room temperature. The selectivity of the prepared sensor toward ammonia gas was tested in the presence of other higher concentrations of hazardous gases and a wide range of relative humidity levels (3 to 90%). The developed low-cost and robust sensor has the potential to monitor ammonia gas in various applications, including medical, environmental, food, and agricultural sectors. Although several studies have been carried out on the application of graphene oxide-polyaniline (GO-PANI) nanocomposites no scientific understanding of the interaction mechanism of GO-PANI and ammonia gas molecules has been investigated. Therefore, in the next step of this research, we monitored and analyzed the microwave gas sensor's response to ammonia gas to gain a better understanding of the interactions and mechanism. The time-dependent sensor response revealed that the Interactions of ammonia gas with polymer surface occurred via chemisorption or physisorption through the Langmuir adsorption mechanism. According to the designed thickness experiment, the thickness of sensitive elements affects the sensitivi…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/79788
note: MICROWAVE GAS SENSOR TECHNOLOGY: DEVELOPING GRAPHENE OXIDE-POLYANILINE NANOCOMPOSITES FOR IMPROVED SENSING AND DETECTION OF AMMONIA GAS by Aida Javadian Saraf M.Sc, Ferdowsi University of Mashhad, 2013 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE COLLEGE OF GRADUATE STUDIES (Mechanical Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) November 2021 © Aida Javadian Saraf, 2021 ii The following individuals certify that they have read, and recommend to The College of Graduate Studies for acceptance, a thesis/dissertation entitled: Microwave Gas Sensor Technology: Developing Graphene Oxide-Polyaniline Nanocomposites For Improved Sensing And Detection Of Ammonia Gas submitted by Aida Javadian Saraf in partial fulfillment of the requirements for the degree of Master of Applied Science Examining Committee: Dr. Mohammad Arjmand, School of Engineering Supervisor Dr. Mohammad Hossein Zarifi, School of Engineering Co-supervisor Dr. Jian Liu, School of Engineering Supervisory Committee Member Dr. Kevin Golovin, Faculty of Applied Science & Engineering Supervisory Committee Member Dr. Yasmine Abdin, Faculty of Applied Science University Examiner iii Abstract Over the past decade, ammonia gas sensors have received significant attention as robust platforms for many applications, including emission control, food safety, and monitoring patients' exhaled breath for the early detection of metabolic disorders. Particularly, to diagnose diseases such as dysfunction of the kidney and the liver, ammonia gas is a key biomarker present in human breath. This thesis explores the development of a microwave-based split-ring resonator (SRR) sensor with enhanced sensitivity to detect ammonia gas at low concentrations. The sensor is based on a nanocomposite fabricated by incorporating carbon-based nanomaterial into polyaniline (PANI) via the in-situ polymerization of aniline monomers. The addition of carbon-based material…
has type: Thesis/Dissertation
date issued: 2021-11
is shown at: 10.14288/1.0402334
language: eng
degree discipline: Mechanical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Arjmand, Mohammad
contributor: Zarifi, Mohammad Hossein
type: Text
identifier URI: http://hdl.handle.net/2429/79788