A novel humidity sensor based on NH2-MIL-125(Ti) metal organic framework with high responsiveness

Zhang, Ying; Chen, Yu; Zhang, Yupeng; Cong, Huahua; Fu, Bo; Wen, Shizhu; Ruan, Shengping

doi:10.1007/s11051-013-2014-6

Cited by 90 publications

(40 citation statements)

References 25 publications

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“…Distinct synthetic methodologies have been used previously to prepare nano-scaled MIL-125-NH 2 : (i) solvothermal synthesis (150 °C/20 h or 50 °C/16 h) [ 40 , 41 , 42 ]; (ii) microwave-assisted solvothermal route (100 °C/15 min or 150 °C/1 h) [ 36 , 43 ]; and (iii) under reflux for 72 h [ 44 ]. Keeping in mind the desire for a simple, easy and low-cost synthetic approach, we optimized an atmospheric pressure method to obtain smaller MIL-125-NH 2 NPs that are compatible with intravenous administration.…”

Section: Resultsmentioning

confidence: 99%

Nanometric MIL-125-NH2 Metal–Organic Framework as a Potential Nerve Agent Antidote Carrier

et al. 2017

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The three-dimensional (3D) microporous titanium aminoterephthalate MIL-125-NH2 (MIL: Material of Institut Lavoisier) was successfully isolated as monodispersed nanoparticles, which are compatible with intravenous administration, by using a simple, safe and low-cost synthetic approach (100 °C/32 h under atmospheric pressure) so that for the first time it could be considered for encapsulation and the release of drugs. The nerve agent antidote 2-[(hydroxyimino)methyl]-1-methyl-pyridinium chloride (2-PAM or pralidoxime) was effectively encapsulated into the pores of MIL-125-NH2 as a result of the interactions between 2-PAM and the pore walls being mediated by π-stacking and hydrogen bonds, as deduced from infrared spectroscopy and Monte Carlo simulation studies. Finally, colloidal solutions of MIL-125-NH2 nanoparticles exhibited remarkable stability in different organic media, aqueous solutions at different pH and under relevant physiological conditions over time (24 h). 2-PAM was rapidly released from the pores of MIL-125-NH2 in vitro.

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Section: Resultsmentioning

confidence: 99%

Nanometric MIL-125-NH2 Metal–Organic Framework as a Potential Nerve Agent Antidote Carrier

et al. 2017

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“…Such a continuous filling, which is observed for UiO-66 solids, is confirmed by the large heats of adsorption at low coverage. 83,84 Fig. 9 Adsorption sites for water in UiO fumarate (MOF-801).…”

Section: Adsorption-desorption Mechanismsmentioning

confidence: 99%

“…Given that this condensation takes place on the surface of the nanosheets and not inside the nanopores, the conductivity pathway is thought to take place through dangling water and In a similar approach, Ti-MIL-125-NH 2 nanoparticles were deposited on interdigitated electrodes. 84 The influence of RH on the impedance response was studied to assess the performance of such architecture for humidity sensor device. Although water sorption was not quantitatively studied in this work, a sorption isotherm for bulk Ti-MIL-125-NH 2 was reported elsewhere.…”

Section: Composite Systemsmentioning

confidence: 99%

Water adsorption in MOFs: fundamentals and applications

et al. 2014

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This review article presents the fundamental and practical aspects of water adsorption in Metal-Organic Frameworks (MOFs). The state of the art of MOF stability in water, a crucial issue to many applications in which MOFs are promising candidates, is discussed here. Stability in both gaseous (such as humid gases) and aqueous media is considered. By considering a non-exhaustive yet representative set of MOFs, the different mechanisms of water adsorption in this class of materials are presented: reversible and continuous pore filling, irreversible and discontinuous pore filling through capillary condensation, and irreversibility arising from the flexibility and possible structural modifications of the host material. Water adsorption properties of more than 60 MOF samples are reported. The applications of MOFs as materials for heat-pumps and adsorbent-based chillers and proton conductors are also reviewed. Some directions for future work are suggested as concluding remarks.

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“…For example, its low conductivity has led to the introduction of impedance spectroscopy in detecting different gases. Although recent success has been made in detecting ammonia and methanol, studies for better selectivity are still required for further applications [ 48 , 49 , 50 , 51 ]. Another application that utilized low conductivity of MOFs is its role as a chemiresistive sensor.…”

Section: Gas Sensing Methodsmentioning

confidence: 99%

Affinity Ionic Liquids for Chemoselective Gas Sensing

Chang

Chang³

et al. 2018

Molecules

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Selective gas sensing is of great importance for applications in health, safety, military, industry and environment. Many man-made and naturally occurring volatile organic compounds (VOCs) can harmfully affect human health or cause impairment to the environment. Gas analysis based on different principles has been developed to convert gaseous analytes into readable output signals. However, gas sensors such as metal-oxide semiconductors suffer from high operating temperatures that are impractical and therefore have limited its applications. The cost-effective quartz crystal microbalance (QCM) device represents an excellent platform if sensitive, selective and versatile sensing materials were available. Recent advances in affinity ionic liquids (AILs) have led them to incorporation with QCM to be highly sensitive for real-time detection of target gases at ambient temperature. The tailorable functional groups in AIL structures allow for chemoselective reaction with target analytes for single digit parts-per-billion detection on mass-sensitive QCM. This structural diversity makes AILs promising for the creation of a library of chemical sensor arrays that could be designed to efficiently detect gas mixtures simultaneously as a potential electronic in future. This review first provides brief introduction to some conventional gas sensing technologies and then delivers the latest results on our development of chemoselective AIL-on-QCM methods.

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A novel humidity sensor based on NH2-MIL-125(Ti) metal organic framework with high responsiveness

Cited by 90 publications

References 25 publications

Nanometric MIL-125-NH2 Metal–Organic Framework as a Potential Nerve Agent Antidote Carrier

Nanometric MIL-125-NH2 Metal–Organic Framework as a Potential Nerve Agent Antidote Carrier

Water adsorption in MOFs: fundamentals and applications

Affinity Ionic Liquids for Chemoselective Gas Sensing

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