If the material has been adapted instead of reproduced from the original RSC publication "Reproduced from" can be substituted with "Adapted from". In all cases the Ref. XX is the XXth reference in the list of references.
Search articles by author
If you are the author of this article you do not need to formally request permission to reproduce figures, diagrams etc. If you are the author of this article you still need to obtain permission to reproduce the whole article in a third party publication with the exception of reproduction of the whole article in a thesis or dissertation. Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.
Fetching data from CrossRef. This may take some time to load. Jump to main content. Jump to site search. Journals Books Databases.
Search Advanced. Current Journals. Archive Journals. All Journals. New Titles. Pick and Choose. Literature Updates. Beside pores with different sizes, shapes and polarities [4], Cu-BTC features open metal sites and is promising for selective adsorption and separation of different gases [5]. Gas sensing with Cu-BTC MOF has already been reported [6], but the determining factors for its gas selectivity - especially in humid air - are not completely understood yet.
In our previous studies we showed that Cu-BTC MOF is suitable for selective detection of pentanal from other aldehydes by means of work function based read-out [7], while other BTC-linked MOFs constructed from other metal ions are good for selective detection of alcohols over alkanes owing to the different polarity of the target gases [8]. As not each kind of MOF-analyte interaction contributes to measurable changes in work function, complementary analytical techniques such as Quartz Crystal Microbalance QCM are desirable.
- Introduction;
- bitcoin cash kurser!
- JavaScript is not enabled in your browser..
- bitcoin mining software amazon.
- ShieldSquare Captcha?
- Journal of Sensors;
Our previous study of alcohol adsorption on Cu-BTC [9] shows the influence of the length of the carbon chain of alcohols on their adsorption properties and highlights that the combination of Kelvin Probe with the QCM technique furnishes new insights into the adsorption mechanism. In the current work organic vapors with the same length of the organic chain C3 but different type carbonyl, hydroxyl and position on C1 and C2 atom of their functional group as well as propane were used as target gases in order to understand the influence of polarity and geometry on the adsorption behavior.
ID Screen® Bluetongue Competition
Mass sensitive read-out with a QCM and work function based read-out with a Kelvin Probe technique were applied and the measurements were performed in dry and humid synthetic air at room temperature. Cu-BTC colloid solutions were prepared according to the procedure described in Ref. The particle size of the Cu-BTC nanocrystals is in the range between nm. Two cycles of exposure to 2-propanol and propanal were measured to eliminate the possible influence of the pre-adsorption of one gas to the adsorption of another. Only small responses in work function and resonance frequency can be seen during exposure to 50 ppm of propane in dry air, while 10 ppm can be hardly detected with both read-outs.
Humidity Detection Using Metal Organic Framework Coated on QCM
By comparing the responses for propanal and 2-propanol, it can be observed that the signal intensities obtained with both read-outs are bigger in dry air compared to humid air. Moreover, the work function response of Cu-BTC during exposure to propanal in dry air is smaller than that to 2-propanol, while the mass sensitive response to propanal is higher.
In humid air mass sensitive response to propanal is smaller than that to 2-propanol, and the work function response to pronanal is near the limit of detection. Comparison of work function and mass sensitive responses to propanal, 2-propanol and propane in dry a and humid b synthetic air. Similar sensing behavior is observed with acetone, 2-propanol and 1-propanol as target gases Fig 3.
ID Screen® Bluetongue Competition - IDvet
In our previous study [9] we showed that the simultaneous operation and evaluation of the signal intensities obtained with Kelvin Probe and QCM allow for a clear differentiation between methanol, ethanol and 1-propanol and 2-propanol in dry air, while in humid air the differentiation is possible for higher concentrations of 1-propanol and 2-propanol gases. Lyons, T. Gao, F. Acta , , vol. Pessatti, T. Sakai, T. Fleischmann, M. Interfacial Electrochem. Sarada, B. Geto, A. Carrallero, V.
Degefu, H. Young, J. Svarc-Gajic, J. Keow, C. Niculescu, M. Telsnig, D. Alonso-Lomillo, M. Salimi, A. Rowsell, J. Fotouhi, L. Zhou, E. Wang, Y. B , , vol.