Publication:
Detection of Acetone Gas using Optical Sensor Coated with ZnO-TiO2 Nanorods

dc.contributor.authorFARAH SAKIINAH BINTI ROSLAN
dc.contributor.supervisorNORAZLINA BTE SAIDIN,Assistant Professor
dc.date.accessioned2024-10-07T03:27:03Z
dc.date.available2024-10-07T03:27:03Z
dc.date.issued2023
dc.description.abstractElectromagnetic interference in conductometric sensing applications has become a questionable argument in terms of safety and reliability, especially when dealing with a volatile organic compound (VOC) that can be highly flammable and may cause massive damage to the surrounding environment. Semiconductor metal oxide has been used in fabricating the sensor for VOC detection, however, the synthesis process is intricate considering tedious, time-consuming and demanding expensive and high technology equipment. In VOC gas sensing, an optical-based sensor has become an alternative in providing a sensitive sensing response. In this research, an optical sensor is developed by coating a tapered multimode fiber (MMF) with zinc oxide (ZnO) nanorods via a hydrothermal approach for low temperature acetone gas detection. An accessible method of doping titanium dioxide (TiO2) powder is proposed as a catalyst for detecting acetone vapor. To further enhance the sensing ability of the ZnO-TiO2 nanorods sensor, a layer of gold-palladium (Au-Pd) thin film is decorated on the ZnO and ZnO-TiO2 nanorods. A custom-made sealed chamber with a volume of 640 m? is set up for the acetone sensing and operated at a temperature of 87 °C. The spectrometry setup is evaluated by monitoring the light intensity response in relation to its wavelength. The sensor performance is monitored for three different concentrations of acetone gas consisting of 1000 ppm, 5000 ppm and 10,000 ppm. Experimental results present that the light intensity of the sensor decreases linearly with the increasing concentration of acetone vapor at the specified wavelength of 666 nm. For the fiber sensor, the performance has been monitored through the light intensity response when the acetone was injected in for four different fiber samples consist of ZnO nanorods (ZN), ZnO nanorods decorated with Au-Pd thin films (ZNAP), ZnO-15mM TiO2 nanorods (ZTN) and ZnO-15mM TiO2 nanorods decorated with Au-Pd thin films (ZTNAP). Notably, the output intensity responses of ZnO-15mM TiO2 nanorods with Au-Pd decoration fiber sensor are found to have the best sensitivity of 0.0172 a.u./nm, repeatability and standard deviation of 0.0236. respectively, toward the concentration change as compared to the desolated ZnO nanorod fiber sensor.
dc.description.abstractarabicG1919288_ABSTRACTARABIC_1677738069_02032023_1421_VERIFIED ABSTRACT (FINAL).docx
dc.description.callnumber0199875041
dc.description.cpsemailcps2u@iium.edu.my
dc.description.degreelevelMaster
dc.description.emailfarahsakiinah09@gmail.com
dc.description.identifierTHESIS :Detection of Acetone Gas using Optical Sensor Coated with ZnO-TiO2 Nanorods/FARAH SAKIINAH BINTI ROSLAN
dc.description.identityG1919288
dc.description.kulliyahKULLIYYAH OF ENGINEERING
dc.description.nationalityMALAYSIA
dc.description.programmeMaster of Science in Engineering
dc.identifier.urihttps://studentrepo.iium.edu.my/handle/123456789/3154
dc.language.isoENGLISH
dc.publisherKuala Lumpur :International Islamic University Malaysia,2023
dc.rightsOWNED BY IIUM
dc.subjectZinc oxide - titanium dioxide nanorod;Simple doping method;Hydrothermal method
dc.titleDetection of Acetone Gas using Optical Sensor Coated with ZnO-TiO2 Nanorods
dspace.entity.typePublication

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