Trace level detection of hydrogen gas using birnessite-type manganese oxide

Tian, Xianqing; Li, Yang; Qing, Xiaoxia; Yu, Kun; Wang, Xinfeng

doi:10.1016/j.snb.2014.08.018

Cited by 22 publications

(16 citation statements)

References 30 publications

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“…The best detection limits obtained by fitting experimental data with equation (2) ((18 ± 1) ppm and (11 ± 1) ppm for Mn 3 O 4 -Ag and Mn 3 O 4 -SnO 2 sensors, respectively) were close to those previously reported for MnO 2 [8], CoO [6] and CuO-TiO 2 -Au [44] sensors, and inferior than those pertaining to ZnO ones [15]. It is also worth noticing that these values were nearly three orders of magnitude lower than the H 2 lower explosion limit (LEL, 40000 ppm) [2,11,12,23,43], highlighting thus the detection efficiency of the present systems.…”

Section: Gas Sensing Performancessupporting

confidence: 85%

“…It is also worthwhile highlighting that the optimal operating temperature for H 2 detection by the present materials (200 • C for Mn 3 O 4 -SnO 2 systems) was lower than the ones reported for Mn 3 O 4 [35], MnO 2 [8], CuO [3,17,29], Co 3 O 4 [16], NiO [9], NiO-ZnO [43], Ni x Co 3-x O 4 [16], BiFeO 3 [7] and CuO-WO 3 sensors [18]. This result is of importance, not only to avoid dangerous temperature-triggered explosions, but also to implement sensing devices with a higher service life and a lower power consumption [11,25,38,41].…”

Section: Gas Sensing Performancesmentioning

confidence: 77%

“…All the observed reflections located at 2θ = 18.0°, 28.9°, 31.0°, 32.3° and 36.1° could be indexed to the (101), (112), (200), (103) and (211) planes of tetragonal hausmannite (α-Mn3O4; a = 5.762 Å and c = 9.470 Å [31,38,59]). The occurrence of relatively weak and broad diffraction peaks suggested the formation of defective nanocrystallites [11], whose average dimensions were close to 25 nm for all the target specimens. A comparison of the signal relative intensities with those of the reference pattern [59] did not reveal any significant orientation/texturing effect, and no appreciable reflections from other Mn oxide polymorphs could be distinguished, highlighting the occurrence of phase-pure systems.…”

Section: Chemico-physical Characterizationmentioning

confidence: 91%

“…Beyond sensitivity, selectivity is an important parameter for the eventual utilization of gas sensing devices [6,11,19,27,30]. The responses towards a specific test gas are in fact required to be higher than those of other potential interferents, in order to avoid false alarms in real-time gas monitoring equipment [36,38,39].…”

Section: Gas Sensing Performancesmentioning

confidence: 99%

“…In this broad scenario, a key role is played by the early recognition of molecular hydrogen (H 2 ), a zero-emission and clean fuel, with a high energy density of ≈130 MJ×kg −1 [2,7], which has emerged as a future energy source for transportation, industrial and residential applications [8][9][10]. Nevertheless, since H 2 is colorless, odorless and highly flammable, the detection of hydrogen leakages at concentrations lower than hazardous levels [11][12][13][14] is extremely critical towards the emergence of a future hydrogen economy [7,8,[15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Gas Sensing Performances of p-Type Mn3O4 Nanosystems: The Role of Built-in Mn3O4/Ag and Mn3O4/SnO2 Junctions

et al. 2020

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Among oxide semiconductors, p-type Mn3O4 systems have been exploited in chemo-resistive sensors for various analytes, but their use in the detection of H2, an important, though flammable, energy vector, has been scarcely investigated. Herein, we report for the first time on the plasma assisted-chemical vapor deposition (PA-CVD) of Mn3O4 nanomaterials, and on their on-top functionalization with Ag and SnO2 by radio frequency (RF)-sputtering, followed by air annealing. The obtained Mn3O4-Ag and Mn3O4-SnO2 nanocomposites were characterized by the occurrence of phase-pure tetragonal α-Mn3O4 (hausmannite) and a controlled Ag and SnO2 dispersion. The system functional properties were tested towards H2 sensing, yielding detection limits of 18 and 11 ppm for Mn3O4-Ag and Mn3O4-SnO2 specimens, three orders of magnitude lower than the H2 explosion threshold. These performances were accompanied by responses up to 25% to 500 ppm H2 at 200 °C, superior to bare Mn3O4, and good selectivity against CH4 and CO2 as potential interferents. A rationale for the observed behavior, based upon the concurrence of built-in Schottky (Mn3O4/Ag) and p-n junctions (Mn3O4/SnO2), and of a direct chemical interplay between the system components, is proposed to discuss the observed activity enhancement, which paves the way to the development of gas monitoring equipments for safety end-uses.

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Section: Gas Sensing Performancessupporting

confidence: 85%

Section: Gas Sensing Performancesmentioning

confidence: 77%

Section: Chemico-physical Characterizationmentioning

confidence: 91%

Section: Gas Sensing Performancesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hydrogen Gas Sensing Performances of p-Type Mn3O4 Nanosystems: The Role of Built-in Mn3O4/Ag and Mn3O4/SnO2 Junctions

et al. 2020

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Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

Ghasemian

Mayyas

Idrus-Saidi

et al. 2019

Adv Funct Materials

137

151

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Liquid metals offer unprecedented chemistry. Here it is shown that they can facilitate self-limiting oxidation processes on their surfaces, which enables the growth of metal oxides that are atomically thin. This claim is exemplified by creating atomically thin hydrated MnO 2 using a Galvanic replacement reaction between permanganate ions and a liquid gallium-indium alloy (EGaIn). The "liquid solution"-"liquid metal" process leads to the reduction of the permanganate ions, resulting in the formation of the oxide monolayer at the interface. It is presented that under mechanical agitation liquid metal droplets are established, and simultaneously, hydrated gallium oxides and manganese oxide sheets delaminate themselves from the interfacial boundaries. The produced nanosheets encapsulate a metallic core, which is found to consist of solid indium only, with the full migration of gallium out of the droplets. This process produces core/shell structures, where the shells are made of stacked atomically thin nanosheets. The obtained core/shell structures are found to be an efficient photocatalyst for the degradation of an organic dye under simulated solar irradiation. This study presents a new research direction toward the modification and functionalization of liquid metals through spontaneous interfacial redox reactions, which has implications for many applications beyond photocatalysis.

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Plasma‐Assisted Growth of β‐MnO₂ Nanosystems as Gas Sensors for Safety and Food Industry Applications

Barreca

Gasparotto

Gri

et al. 2018

Adv Materials Inter

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The development of efficient sensors for security field and food quality control applications has gained an ever‐increasing attention for various end‐uses. In this context, this work reports on the preparation of β‐MnO2 nanosystems by plasma enhanced‐chemical vapor deposition (PE‐CVD), using a fluorinated Mn(II) diamine‐diketonate as single‐source precursor for both Mn and F. Modulations of oxygen partial pressure enable to tailor not only the morphology and oxygen vacancy content, but also fluorine doping level of the resulting systems. For the first time, the gas sensing performances of PE‐CVD β‐MnO2 nanomaterials are tested in the detection of acetonitrile, a poisonous chemical warfare agent (CWA) simulant, and ethylene, an important marker of fruit ripening. The obtained results demonstrate that the fabricated sensors can efficiently detect these analytes, with the best responses at moderate temperatures (≤200 °C), enhanced by a higher oxygen vacancy content and fluorine concentration. These features, coupled with the good selectivity and response times, candidate the developed systems as amenable platforms for practical applications.

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Trace level detection of hydrogen gas using birnessite-type manganese oxide

Cited by 22 publications

References 30 publications

Hydrogen Gas Sensing Performances of p-Type Mn3O4 Nanosystems: The Role of Built-in Mn3O4/Ag and Mn3O4/SnO2 Junctions

Hydrogen Gas Sensing Performances of p-Type Mn3O4 Nanosystems: The Role of Built-in Mn3O4/Ag and Mn3O4/SnO2 Junctions

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

Plasma‐Assisted Growth of β‐MnO₂ Nanosystems as Gas Sensors for Safety and Food Industry Applications

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Trace level detection of hydrogen gas using birnessite-type manganese oxide

Cited by 22 publications

References 30 publications

Hydrogen Gas Sensing Performances of p-Type Mn3O4 Nanosystems: The Role of Built-in Mn3O4/Ag and Mn3O4/SnO2 Junctions

Hydrogen Gas Sensing Performances of p-Type Mn3O4 Nanosystems: The Role of Built-in Mn3O4/Ag and Mn3O4/SnO2 Junctions

Self‐Limiting Galvanic Growth of MnO2 Monolayers on a Liquid Metal—Applied to Photocatalysis

Plasma‐Assisted Growth of β‐MnO2 Nanosystems as Gas Sensors for Safety and Food Industry Applications

Contact Info

Product

Resources

About

Self‐Limiting Galvanic Growth of MnO₂ Monolayers on a Liquid Metal—Applied to Photocatalysis

Plasma‐Assisted Growth of β‐MnO₂ Nanosystems as Gas Sensors for Safety and Food Industry Applications