Details
| Original language | English |
|---|---|
| Article number | 110227 |
| Journal | Microporous and Mesoporous Materials |
| Volume | 302 |
| Early online date | 8 Apr 2020 |
| Publication status | Published - 1 Aug 2020 |
Abstract
Nano-scaled UiO-66 and UiO-66-NH2 crystals are synthesized via a solvothermal procedure and investigated regarding their applicability in CO2 sensing devices. The interaction between CO2 and UiO-66 as well as UiO-66-NH2 is studied via FTIR and dielectric measurements with a home-made sensing-cell contraption. The affinity towards low CO2 concentrations is proved by FTIR measurements with 20 ppm CO2. We show, that the co-existence of water leads to an even higher CO2 adsorption compared to the absence of water. Both UiO-MOFs show a good response towards low CO2 concentrations, but UiO-66-NH2 is far more sensitive than UiO-66. In dielectric studies, the affinity of UiO-66 and UiO-66-NH2 towards CO2 results in a strong decrease of the capacity at low frequencies. While UiO-66-NH2 seems to be suited for sensing devices within a CO2 concentration range from 1 up to 100%, UiO-66 seems not be suitable for capacitive CO2 sensing.
Keywords
- Carbon dioxide, Dielectric spectroscopy, FTIR spectroscopy, Gas sensing, Metal-organic frameworks, UiO-66
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanics of Materials
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In: Microporous and Mesoporous Materials, Vol. 302, 110227, 01.08.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - UiO-66 and UiO-66-NH2 based sensors
T2 - Dielectric and FTIR investigations on the effect of CO2 adsorption
AU - Strauss, Ina
AU - Chakarova, Kristina
AU - Mundstock, Alexander
AU - Mihaylov, Mihail
AU - Hadjiivanov, Konstantin
AU - Guschanski, Natalija
AU - Caro, Jürgen
N1 - Funding Information: The authors of this work are grateful for the financial support from the Hannover School for Nanotechnology (HSN) (organized by R. Haug and F. Schulze-Wischeler) and the Bulgarian Ministry of Education and Science (contract D?1-214/ 28.11.2018) under the National Research Programme ??Low-carbon Energy for the Transport and Domestic Use - EPLUS? approved by DCM # 577/17.08.2018". SEM and EDX measurements were performed by Frank Steinbach at the Institute of Physical Chemistry and Electrochemistry. The authors thank A. Sch?nhals (BAM, Berlin) for stimulating discussions. I.S. thanks J. Lacayo-Pineda (Continental, Hannover) for the access to the Impedance Spectrometer. Funding Information: The authors of this work are grateful for the financial support from the Hannover School for Nanotechnology (HSN) (organized by R. Haug and F. Schulze-Wischeler) and the Bulgarian Ministry of Education and Science (contract DО1-214/ 28.11.2018) under the National Research Programme ““ Low-carbon Energy for the Transport and Domestic Use - EPLUS ” approved by DCM # 577/17.08.2018". SEM and EDX measurements were performed by Frank Steinbach at the Institute of Physical Chemistry and Electrochemistry. The authors thank A. Schönhals (BAM, Berlin) for stimulating discussions. I.S. thanks J. Lacayo-Pineda (Continental, Hannover) for the access to the Impedance Spectrometer.
PY - 2020/8/1
Y1 - 2020/8/1
N2 - Nano-scaled UiO-66 and UiO-66-NH2 crystals are synthesized via a solvothermal procedure and investigated regarding their applicability in CO2 sensing devices. The interaction between CO2 and UiO-66 as well as UiO-66-NH2 is studied via FTIR and dielectric measurements with a home-made sensing-cell contraption. The affinity towards low CO2 concentrations is proved by FTIR measurements with 20 ppm CO2. We show, that the co-existence of water leads to an even higher CO2 adsorption compared to the absence of water. Both UiO-MOFs show a good response towards low CO2 concentrations, but UiO-66-NH2 is far more sensitive than UiO-66. In dielectric studies, the affinity of UiO-66 and UiO-66-NH2 towards CO2 results in a strong decrease of the capacity at low frequencies. While UiO-66-NH2 seems to be suited for sensing devices within a CO2 concentration range from 1 up to 100%, UiO-66 seems not be suitable for capacitive CO2 sensing.
AB - Nano-scaled UiO-66 and UiO-66-NH2 crystals are synthesized via a solvothermal procedure and investigated regarding their applicability in CO2 sensing devices. The interaction between CO2 and UiO-66 as well as UiO-66-NH2 is studied via FTIR and dielectric measurements with a home-made sensing-cell contraption. The affinity towards low CO2 concentrations is proved by FTIR measurements with 20 ppm CO2. We show, that the co-existence of water leads to an even higher CO2 adsorption compared to the absence of water. Both UiO-MOFs show a good response towards low CO2 concentrations, but UiO-66-NH2 is far more sensitive than UiO-66. In dielectric studies, the affinity of UiO-66 and UiO-66-NH2 towards CO2 results in a strong decrease of the capacity at low frequencies. While UiO-66-NH2 seems to be suited for sensing devices within a CO2 concentration range from 1 up to 100%, UiO-66 seems not be suitable for capacitive CO2 sensing.
KW - Carbon dioxide
KW - Dielectric spectroscopy
KW - FTIR spectroscopy
KW - Gas sensing
KW - Metal-organic frameworks
KW - UiO-66
UR - http://www.scopus.com/inward/record.url?scp=85083061855&partnerID=8YFLogxK
U2 - 10.1016/j.micromeso.2020.110227
DO - 10.1016/j.micromeso.2020.110227
M3 - Article
AN - SCOPUS:85083061855
VL - 302
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
M1 - 110227
ER -