Humidity adsorption kinetics of a trypsin gel film

Okur, Salih; Ceylan, Cagatay; Çulcular, Evren

doi:10.1016/j.jcis.2011.09.078

Cited by 12 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Langmuir adsorption isotherm model has been frequently used 23,[34][35][36][37] for various gases such as humidity on organic or inorganic films to describe adsorption kinetics. According to this model, the rate of surface reaction to form a monolayer on the surface is given using the following equations:…”

Section: Sensing Properties Of Metal Oxide Nanofibersmentioning

confidence: 99%

VOC sensors based on a metal oxide nanofibrous membrane/QCM system prepared by electrospinning

et al. 2014

Self Cite

View full text Add to dashboard Cite

aeWe report a simple synthetic route to fabricate crystalline ZnO and CeO 2 /ZnO nanofibrous mats and their sensing characteristics against volatile organic compounds (VOCs) such as benzene, propanol, ethanol, and dichloromethane. Precursor fibers were fabricated by electrospinning of poly(vinyl alcohol) and metal salt(s) at 2.5 kV cm À1 in aqueous solution. The fibers were directly deposited on the crystal surface of a quartz crystal microbalance (QCM). The crystal, which was coated by nanostructured PVA/metal precursor(s) fibers, was subjected to calcination in air at 500 1C for 5 h. The formation of an oxide based nanofiber mat was revealed by scanning electron microscopy and X-ray diffraction. Upon exposure of the nanofiber mats to the VOCs, the compounds adsorbed onto the surface of oxidic fibers. The physisorption of the compounds was confirmed by FTIR and QCM. Both systems showed sensitivity to the VOCs and they hold a broad promise particularly for sensing applications of volatile alcoholic compounds. The introduction of CeO 2 into the ZnO structure reduced the sensitivity of ZnO most probably due to the decrement of oxygen vacancies.

show abstract