Organic–inorganic hybrids for CO<sub>2</sub> sensing, separation and conversion

Rebber, Matthias; Willa, Christoph; Koziej, Dorota

doi:10.1039/c9nh00380k

Cited by 28 publications

(17 citation statements)

References 291 publications

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“…As stated earlier, our aim is not to produce a complete bibliographic review of each mentioned technique. We do so for the sake of conciseness, and because comprehensive reviews focusing on one or another of the techniques presented here are available in the literature [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. While the latter performs an in-depth coverage of their respective topic (e.g., nanomaterials-based sensors [ 18 , 22 ]), they never cover the full range of CO

sensing possibilities.…”

Section: Review Of Co Sensing Techniquesmentioning

confidence: 99%

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Dervieux¹,

Théron

Uhring

2021

Sensors

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Carbon dioxide (CO2) monitoring in human subjects is of crucial importance in medical practice. Transcutaneous monitors based on the Stow-Severinghaus electrode make a good alternative to the painful and risky arterial “blood gases” sampling. Yet, such monitors are not only expensive, but also bulky and continuously drifting, requiring frequent recalibrations by trained medical staff. Aiming at finding alternatives, the full panel of CO2 measurement techniques is thoroughly reviewed. The physicochemical working principle of each sensing technique is given, as well as some typical merit criteria, advantages, and drawbacks. An overview of the main CO2 monitoring methods and sites routinely used in clinical practice is also provided, revealing their constraints and specificities. The reviewed CO2 sensing techniques are then evaluated in view of the latter clinical constraints and transcutaneous sensing coupled to a dye-based fluorescence CO2 sensing seems to offer the best potential for the development of a future non-invasive clinical CO2 monitor.

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sensing possibilities.…”

Section: Review Of Co Sensing Techniquesmentioning

confidence: 99%

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Dervieux¹,

Théron

Uhring

2021

Sensors

View full text Add to dashboard Cite

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“…and inorganic materials (large surface area, conductivity, etc.) (Judeinstein and Sanchez, 1996; Faustini et al, 2018;Zhang et al, 2019;Rebber et al, 2020;Yang et al, 2020), but also improve the physicochemical properties, such as the increased CO 2 adsorption and conductivity, enriched types of active sites, maximized exposure of active sites, and manipulated reaction pathways by tuning the stability of intermediates, thereby synergistically reducing the overpotential and promoting product selectivity (Nam et al, 2020;Sun et al, 2020). As an example, Kramer et al grafted a cobalt metalated phthalocyanine complex onto a pyridine-substituted polymer that resulted in an increase of selectivity towards CO due to an axial coordination between carbon monoxide and the metal center (Kramer and McCrory, 2016).…”

Section: Organic Inorganic/polymer Hybrid Materials For Co 2 Reductionmentioning

confidence: 99%

Recent Progress in (Photo-)-Electrochemical Conversion of CO2 With Metal Porphyrinoid-Systems

et al. 2021

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Since decades, the global community has been facing an environmental crisis, resulting in the need to switch from outdated to new, more efficient energy sources and a more effective way of tackling the rising carbon dioxide emissions. The activation of small molecules such as O2, H+, and CO2 in a cost—and energy-efficient way has become one of the key topics of catalysis research. The main issue concerning the activation of these molecules is the kinetic barrier that has to be overcome in order for the catalyzed reaction to take place. Nature has already provided many pathways in which small molecules are being activated and changed into compounds with higher energy levels. One of the most famous examples would be photosynthesis in which CO2 is transformed into glucose and O2 through sunlight, thus turning solar energy into chemical energy. For these transformations nature mostly uses enzymes that function as catalysts among which porphyrin and porphyrin-like structures can be found. Therefore, the research focus lies on the design of novel porphyrinoid systems (e.g. corroles, porphyrins and phthalocyanines) whose metal complexes can be used for the direct electrocatalytic reduction of CO2 to valuable chemicals like carbon monoxide, formate, methanol, ethanol, methane, ethylene, or acetate. For example the cobalt(III)triphenylphosphine corrole complex has been used as a catalyst for the electroreduction of CO2 to ethanol and methanol. The overall goal and emphasis of this research area is to develop a method for industrial use, raising the question of whether and how to incorporate the catalyst onto supportive materials. Graphene oxide, multi-walled carbon nanotubes, carbon black, and activated carbon, to name a few examples, have become researched options. These materials also have a beneficial effect on the catalysis through for instance preventing rival reactions such as the Hydrogen Evolution Reaction (HER) during CO2 reduction. It is very apparent that the topic of small molecule activation offers many solutions for our current energy as well as environmental crises and is becoming a thoroughly investigated research objective. This review article aims to give an overview over recently gained knowledge and should provide a glimpse into upcoming challenges relating to this subject matter.

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“…Organic-inorganic hybrid functional materials are considered excellent candidates in a vast number of applications in various domains such as microelectronics [6], nanomedicine [7], energy storage [8,9], light-harvesting [10], drug delivery [11], housing [12], environmental decontamination [13], gas sensors [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Quaternary Oxidized Carbon Nanohorns—Based Nanohybrid as Sensing Coating for Room Temperature Resistive Humidity Monitoring

et al. 2021

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We report the relative humidity (RH) sensing response of a resistive sensor, employing sensing layers, based on a quaternary organic–inorganic hybrid nanocomposite comprising oxidized carbon nanohorns (CNHox), graphene oxide (GO), tin dioxide, and polyvinylpyrrolidone (PVP), at 1/1/1/1 and 0.75/0.75/1/1/1 mass ratios. The sensing structure comprises a silicon substrate, a SiO2 layer, and interdigitated transducer (IDT) electrodes. The sensing film was deposited via the drop-casting method on the sensing structure. The morphology and the composition of the sensing layers were investigated through Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), and RAMAN spectroscopy. The organic–inorganic quaternary hybrid-based thin film’s resistance increased when the sensors were exposed to relative humidity ranging from 0 to 100%. The manufactured devices show a room temperature response comparable to that of a commercial capacitive humidity sensor and characterized by excellent linearity, rapid response and recovery times, and good sensitivity. While the sensor with CNHox/GO/SnO2/PVP at 0.75/0.75/1/1 as the sensing layer has the best performance in terms of linearity and recovery time, the structures employing the CNHox/GO/SnO2/PVP at 1/1/1/1 (mass ratio) have a better performance in terms of relative sensitivity. We explained each constituent of the quaternary hybrid nanocomposites’ sensing role based on their chemical and physical properties, and mutual interactions. Different alternative mechanisms were taken into consideration and discussed. Based on the sensing results, we presume that the effect of the p-type semiconductor behavior of CNHox and GO, correlated with swelling of PVP, dominates and leads to the overall increasing resistance of the sensing layer. The hard–soft acid–base (HSAB) principle also supports this mechanism.

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Organic–inorganic hybrids for CO₂ sensing, separation and conversion

Abstract: Organic–Inorganic hybrids – from individual building blocks to an artificial carbon cycle and beyond.

Cited by 28 publications

References 291 publications

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Recent Progress in (Photo-)-Electrochemical Conversion of CO2 With Metal Porphyrinoid-Systems

Quaternary Oxidized Carbon Nanohorns—Based Nanohybrid as Sensing Coating for Room Temperature Resistive Humidity Monitoring

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Organic–inorganic hybrids for CO2 sensing, separation and conversion

Abstract: Organic–Inorganic hybrids – from individual building blocks to an artificial carbon cycle and beyond.

Cited by 28 publications

References 291 publications

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Carbon Dioxide Sensing—Biomedical Applications to Human Subjects

Recent Progress in (Photo-)-Electrochemical Conversion of CO2 With Metal Porphyrinoid-Systems

Quaternary Oxidized Carbon Nanohorns—Based Nanohybrid as Sensing Coating for Room Temperature Resistive Humidity Monitoring

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Organic–inorganic hybrids for CO₂ sensing, separation and conversion