Metal–Organic Framework Co-MOF-74-Based Host–Guest Composites for Resistive Gas Sensing | Zendy

Ina Strauß | Zendy; Alexander Mundstock | Zendy; Marvin Treger | Zendy; Karsten Lange | Zendy; Seungtaik Hwang | Zendy; Christian Chmelik | Zendy; Pascal Rusch | Zendy; Nadja C. Bigall | Zendy; Thomas Pichler | Zendy; Hidetsugu Shiozawa | Zendy; Jürgen Caro | Zendy

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Metal–Organic Framework Co-MOF-74-Based Host–Guest Composites for Resistive Gas Sensing

Author(s) -

Ina Strauß,

Alexander Mundstock,

Marvin Treger,

Karsten Lange,

Seungtaik Hwang,

Christian Chmelik,

Pascal Rusch,

Nadja C. Bigall,

Thomas Pichler,

Hidetsugu Shiozawa,

Jürgen Caro

Publication year - 2019

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.8b22002

Subject(s) - materials science , metal organic framework , thermogravimetric analysis , adsorption , raman spectroscopy , chemical engineering , nanocomposite , infrared spectroscopy , scanning electron microscope , infrared , selectivity , nanotechnology , composite material , chemistry , organic chemistry , optics , engineering , physics , catalysis

Increasing demands in the field of sensing, especially for gas detection applications, require new approaches to chemical sensors. Metal-organic frameworks (MOFs) can play a decisive role owing to their outstanding performances regarding gas selectivity and sensitivity. The tetrathiafulvalene (TTF)-infiltrated MOF, Co-MOF-74, has been prepared following the host-guest concept and evaluated in resistive gas sensing. The Co-MOF-74-TTF crystal morphology has been characterized via X-ray diffraction and scanning electron microscopy, while the successful incorporation of TTF into the MOF has been validated via X-ray photoemission spectroscopy, thermogravimetric analysis, UV/vis, infrared (IR), and Raman investigations. We demonstrate a reduced yet ample uptake of CO 2 in the pores of the new material by IR imaging and adsorption isotherms. The nanocomposite Co-MOF-74-TTF exhibits an increased electrical conductivity in comparison to Co-MOF-74 which can be influenced by gas adsorption from a surrounding atmosphere. This effect could be used for gas sensing.

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