Synthesis and characterisation of gas sensor materials obtained from Pt/Zn/Al layered double hydroxides

Morandi, Sara; Prinetto, F.; Martino, Marcello Di; Ghiotti, G.; Lorret, O.; Tichit, Didier; Malagù, C.; Vendemiati, B.; Carotta, M.C.

doi:10.1016/j.snb.2006.04.025

Cited by 33 publications

(25 citation statements)

References 11 publications

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“…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%

“…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

106

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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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“…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%

Section: Introductionmentioning

confidence: 99%

Thin 2D: The New Dimensionality in Gas Sensing

Neri

2017

Chemosensors

106

View full text Add to dashboard Cite

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“…LDHs have a wide range of applications in many fields, e.g., as catalysts or catalyst precursors, ion exchangers, adsorbents for environmental contaminants, and substrates for the immobilization of biological material [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Thermal decomposition of the LDH at high temperature leads to the formation of mixed metal oxide (MMO) materials composed of spinel-like (M Ⅱ M Ⅲ 2 O 4 ) phases and other metal oxide phases (M Ⅱ O) and previous studies have shown that such materials can be used as catalysts and catalyst supports, sensors, and Li-ion battery electrodes [15][16][17]. In particular, thermal treatment of LDH precursors containing Fe Ⅲ in the layers leads to the formation of spinel ferrite materials with excellent magnetic properties [18].…”

Section: Introductionmentioning

confidence: 99%

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

Zhao

Wang

et al. 2010

Nano Res.

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NiFe 2 O 4 nanoparticles (<10 nm) embedded in a NiO matrix have been fabricated by calcining the corresponding Ni Ⅱ Fe Ⅲ -layered double hydroxide (LDH) precursors at high temperature (500 °C ). Compared with the NiFe 2 O 4 /NiO nanocomposite obtained by calcination of a precursor prepared by a traditional chemical coprecipitation method, those derived from NiFe-LDH precursors show much higher blocking temperatures (T B ) (~380 K). The enhanced magnetic stability can be ascribed to the much stronger interfacial interaction between NiFe 2 O 4 and NiO phases due to the topotactic nature of the transformation of the LDH precursor to the NiFe 2 O 4 /NiO composite material. Through tuning the Ni Ⅱ /Fe Ⅲ molar ratio of the NiFe-LDH precursor, the NiFe 2 O 4 concentration can be precisely controlled, and the T B value as well as the magnetic properties of the final material can also be regulated. This work represents a successful example of the fabrication of ferro(ferri)magnetic (FM)/antiferrimagnetic (AFM) systems with high magnetic stability from LDH precursors. This method is general and may be readily extended to other FM/AFM systems due to the wide range of available LDH precursors.

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“…Recently, Pt/ Zn(Al)O materials prepared from Pt complex/LDH composite were used for gas sensor of CO, CH4, and benzene. 11) Since the octahedral type noble metals were used for these researches, it is thought that the interlayer distance of LDH has extended greatly by introduced noble metal ion. These layer structures, therefore, were unsuitable for synthesize nanocomposite dispersing fine and uniform size noble metal particle because of higher mobility of interlayer ion or metal depend on the extended interlayer of LDH.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Pt particles dispersing nanocomposites by thermal treatment of tetrachloroplatinate/layered double hydroxide (LDH)

Kameshima

Nakajima

Okada

et al. 2009

J. Ceram. Soc. Japan

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Mg-Al LDH intercalated PtCl42-anion (PtCl4-LDH) was synthesized by a reconstruction method using potassium tetrachloroplatinate and its thermal changes were investigated at various temperatures. The PtCl4-LDH included 17 mass% Pt was synthesized by a reconstruction method using K2PtCl4 solution of 10 mM to adjust the pH with NaOH to about 11. The obtained PtCl4-LDH shows high crystallinity and has low content of CO3 2-. The basal spacing of the obtained PtCl4-LDH was 0.83 nm expanding slightly from 0.78 nm of starting LDH. The XRD patterns of the obtained PtCl4-LDH showed that the second 00l diffraction line (006) became more accentuated than the first one (003) according to the intercalation of Pt components. Pt fine particles in the several nm were directly observed by TEM after firing at 500°C. However, the diffraction patterns of Pt or Pt components were not detected via XRD in the same sample. This is due to the coagulation of Pt components by the narrow basal spacing of the PtCl4-LDH.

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Synthesis and characterisation of gas sensor materials obtained from Pt/Zn/Al layered double hydroxides

Cited by 33 publications

References 11 publications

Thin 2D: The New Dimensionality in Gas Sensing

Thin 2D: The New Dimensionality in Gas Sensing

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

Preparation of Pt particles dispersing nanocomposites by thermal treatment of tetrachloroplatinate/layered double hydroxide (LDH)

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