TY - JOUR
T1 - Humidity Detection Using Metal Organic Framework Coated on QCM
AU - Kosuru, Lakshmoji
AU - Bouchaala, Adam M.
AU - Jaber, Nizar
AU - Younis, Mohammad I.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors are thankful to Dr. Osama Shekhah and Professor Mohamed Eddaoudi for providing and helping in preparing HKUST-1. This research has been supported by KAUST.
PY - 2016/7/31
Y1 - 2016/7/31
N2 - Quartz crystal microbalance (QCM) coated with poly-4-vinylpyridine (PVP) and metal organic framework HKUST-1 are investigated and compared for humidity sensing. Drop casting method is employed to coat the PVP and HKUST-1 solutions onto the surface of a quartz crystal microbalance. The resonance frequencies of these sensors with varying relative humidity (RH) from 22% RH to 69% RH are measured using impedance analysis method. The sensitivity, humidity hysteresis, response, and recovery times of these sensors are studied. The sensitivities of uncoated, PVP, and HKUST-1 coated QCM sensors are 7 Hz, 48 Hz, and 720 Hz, respectively, in the range of 22% RH–69% RH. The extraction of desorption rate and adsorption energy associated with the adsorption and desorption of water molecules on these surfaces reveals that HKUST-1 has better sensing properties than PVP and uncoated QCM sensors. In this work, the HKUST-1 coated QCM is shown to be a promising material for moisture detection.
AB - Quartz crystal microbalance (QCM) coated with poly-4-vinylpyridine (PVP) and metal organic framework HKUST-1 are investigated and compared for humidity sensing. Drop casting method is employed to coat the PVP and HKUST-1 solutions onto the surface of a quartz crystal microbalance. The resonance frequencies of these sensors with varying relative humidity (RH) from 22% RH to 69% RH are measured using impedance analysis method. The sensitivity, humidity hysteresis, response, and recovery times of these sensors are studied. The sensitivities of uncoated, PVP, and HKUST-1 coated QCM sensors are 7 Hz, 48 Hz, and 720 Hz, respectively, in the range of 22% RH–69% RH. The extraction of desorption rate and adsorption energy associated with the adsorption and desorption of water molecules on these surfaces reveals that HKUST-1 has better sensing properties than PVP and uncoated QCM sensors. In this work, the HKUST-1 coated QCM is shown to be a promising material for moisture detection.
UR - http://hdl.handle.net/10754/619772
UR - http://www.hindawi.com/journals/js/2016/4902790/
UR - http://www.scopus.com/inward/record.url?scp=84985000683&partnerID=8YFLogxK
U2 - 10.1155/2016/4902790
DO - 10.1155/2016/4902790
M3 - Article
SN - 1687-725X
VL - 2016
SP - 1
EP - 8
JO - Journal of Sensors
JF - Journal of Sensors
ER -