Layered Double Hydroxides Intercalated with Chlorine Used as Low Temperature Gas Sensors

Polese, Davide; Mattoccia, A.; Giorgi, F. M.; Pazzini, Luca; Ferrone, Andrea; Giamberardino, L. Di; Maiolo, Luca; Pecora, A.; Convertino, Annalisa; Fortunato, G.; Medaglia, P. G.

doi:10.1016/j.proeng.2015.08.765

Cited by 16 publications

(9 citation statements)

References 7 publications

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“…Zn/Al-LDHs materials have been prepared and tested in various atmospheres by Polese and coworkers. The results show that this kind of material is able to detect the tested volatile compounds (CH4, CO, NO) and discriminate different concentrations at room temperature [10].…”

Section: Lhds Sheetsmentioning

confidence: 91%

“…The ultrahigh thickness and its very high associated surface area is one of the most important factors that helps to enhance the gas sensing performance of thin 2D nanostructures ( Figure 2). gases and vapors such as nitrogen oxides, acetone, and ethanol [10]. 2D layered materials have been also used as precursors for obtaining thin two-dimensional metal oxides [11][12][13].…”

Section: Factors Influencing the Gas Sensing Characteristics Of Thin mentioning

confidence: 99%

“…By varying the metallic cations, their ratio, and the interlayer anions, a great number of LDHs types can be formed. LDHs structure exhibits a pathway facilitating carrier diffusion/transportation, therefore they received considerable attention for direct potential applications in gas sensors for monitoring a wide class of gases and vapors such as nitrogen oxides, acetone, and ethanol [10]. 2D layered materials have been also used as precursors for obtaining thin two-dimensional metal oxides [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Thin 2D: The New Dimensionality in Gas Sensing

Neri

2017

Chemosensors

112

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Abstract:Since the first report of graphene, thin two-dimensional (2D) nanomaterials with atomic or molecular thicknesses have attracted great research interest for gas sensing applications. This was due to the distinctive physical, chemical, and electronic properties related to their ultrathin thickness, which positively affect the gas sensing performances. This feature article discusses the latest developments in this field, focusing on the properties, preparation, and sensing applications of thin 2D inorganic nanomaterials such as single-or few-layer layered double hydroxides/transition metal oxides/transition metal dichalcogenides. Recent studies have shown that thin 2D inorganic nanomaterials could provide monitoring of harmful/toxic gases with high sensitivity and a low concentration detection limit by means of conductometric sensors operating at relatively low working temperatures. Promisingly, by using these thin 2D inorganic nanomaterials, it may open a simple way of improving the sensing capabilities of conductometric gas sensors.

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Section: Lhds Sheetsmentioning

confidence: 91%

Section: Factors Influencing the Gas Sensing Characteristics Of Thin mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thin 2D: The New Dimensionality in Gas Sensing

Neri

2017

Chemosensors

112

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“…Chlormagaluminite, Mg 4 Al 2 (OH) 12 Cl 2 (H 2 O) 2 , is a member of the quintinite group, which belongs to the hydrotalcite supergroup [1]. Hydrotalcite-supergroup minerals and their synthetic analogs are known as layered double hydroxides (LDHs), which found many applications in modern industry.…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that Mg-Al-Cl LDHs form as secondary phases in leaching experiments with metallic uranium-aluminum research reactor fuel and may incorporate Eu into their structures [10]. They are endorsed for biosensors [11] and gas sensors [12]. In addition, the recent study demonstrated that the Mg2Al-Cl (a synthetic analog of chlormagaluminite) and Zn2Al-Cl LDHs can be applied for biomedical purposes due to their good compatibility with living matter [13].…”

Section: Introductionmentioning

confidence: 99%

Crystal Chemistry of Chlormagaluminite, Mg4Al2(OH)12Cl2(H2O)2, a Natural Layered Double Hydroxide

et al. 2019

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Chlormagaluminite is the only Cl-dominated hydrotalcite-supergroup mineral species with M2+:M3+ = 2:1. The holotype sample of chlormagaluminite from the Kapaevskaya volcanic pipe (Irkutsk Oblast, Siberia, Russia) has been chemically and structurally characterized. The average chemical composition of the mineral is (electron microprobe, OH content is calculated by stoichiometry and H2O from the crystal-structure data, wt. %): MgO 33.85, FeO 1.09, Al2O3 22.07, Cl 14.72, H2Otot 30.96, Cl=O −3.39, total 99.30. The empirical formula based on Mg + Al + Fe = 6 atoms per formula unit (apfu) is [Mg3.91Fe2+0.07Al2.02(OH)12]Cl2.02(H2O)2.0(2). The crystal structure has been solved from single-crystal X-ray diffraction data in the space group P63/mcm, a = 5.268(3), c = 15.297(8) Å and V = 367.6(4) Å3. The refinement converged to R1 = 0.083 on the basis of 152 unique reﬂections with I > 2σ(I) collected at room conditions. The powder pattern contains standard reflections of a 2H polytype and two additional reflections [(010), d010 = 4.574 Å; (110), d110 = 2.647 Å] indicative of Mg and Al ordering according to the superstructure. The structure is based upon brucite-type octahedral layers with an ordered distribution of Mg and Al over octahedral sites. The Cl− anions and H2O molecules reside in the interlayer, providing a three-dimensional integrity of the structure.

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Synthesis, characterization, and gas sensing properties of Ni-Cr-Al LDH

et al. 2021

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In recent years, the unique properties of Layered Double Hydroxides (LDHs) led to an interest in using LDHs as sensors, but gas sensing properties of LDHs have not still been broadly investigated. In this work, Ni-Cr-Al LDH was synthesized by co-precipitation method and was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Fourier-transform infrared spectroscopy (FTIR), and then, its sensing properties were investigated in the presence of various gases at room temperature (25 ± 2 °C). It was observed that the sensors resistance changes in the presence of acetone were descending, and the opposite trend was observed for alcohols. The sensor's selectivity and stability were acceptable, but its response and recovery times were somewhat long (about a few minutes).

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Layered Double Hydroxides Intercalated with Chlorine Used as Low Temperature Gas Sensors

Cited by 16 publications

References 7 publications

Thin 2D: The New Dimensionality in Gas Sensing

Thin 2D: The New Dimensionality in Gas Sensing

Crystal Chemistry of Chlormagaluminite, Mg4Al2(OH)12Cl2(H2O)2, a Natural Layered Double Hydroxide

Synthesis, characterization, and gas sensing properties of Ni-Cr-Al LDH

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