Partially oxidized Ti3C2Tx MXene-sensitive material-based ammonia gas sensor with high-sensing performances for room temperature application

Yao, Lifang; Tian, Xu; Cui, Xiuxiu; Zhao, Rongjun; Xiao, Xuechun; Wang, Yude

doi:10.1007/s10854-021-07166-w

Cited by 27 publications

(21 citation statements)

References 37 publications

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“…5b). A weight loss of 3.4% was observed at 120 °C, which was due to the evaporation of the physically adsorbed, interlayer water molecules 32,33 . However, this weight loss was followed by a minor weight gain at 330 °C, which indicated the onset of oxidation of the V 2 CT x MXene.…”

Section: Resultsmentioning

confidence: 99%

V2CTX MXene-based hybrid sensor with high selectivity and ppb-level detection for acetone at room temperature

Majhi

Ali

Greish

et al. 2023

Sci Rep

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High-performance, room temperature-based novel sensing materials are one of the frontier research topics in the gas sensing field, and MXenes, a family of emerging 2D layered materials, has gained widespread attention due to their distinctive properties. In this work, we propose a chemiresistive gas sensor made from V2CTx MXene-derived, urchin-like V2O5 hybrid materials (V2C/V2O5 MXene) for gas sensing applications at room temperature. The as-prepared sensor exhibited high performance when used as the sensing material for acetone detection at room temperature. Furthermore, the V2C/V2O5 MXene-based sensor exhibited a higher response (S% = 11.9%) toward 15 ppm acetone than pristine multilayer V2CTx MXenes (S% = 4.6%). Additionally, the composite sensor demonstrated a low detection level at ppb levels (250 ppb) at room temperature, as well as high selectivity among different interfering gases, fast response-recovery time, good repeatability with minimal amplitude fluctuation, and excellent long-term stability. These improved sensing properties can be attributed to the possible formation of H-bonds in multilayer V2C MXenes, the synergistic effect of the newly formed composite of urchin-like V2C/V2O5 MXene sensor, and high charge carrier transport at the interface of V2O5 and V2C MXene.

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Section: Resultsmentioning

confidence: 99%

V2CTX MXene-based hybrid sensor with high selectivity and ppb-level detection for acetone at room temperature

Majhi

Ali

Greish

et al. 2023

Sci Rep

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“…The room temperature NH 3 -sensing mechanism of Ti 3 C 2 Tx Mxene/GO/CuO/ZnO nanocomposite has been described based on the formation of multiple p–n heterojunctions at the Ti 3 C 2 Tx Mxene/GO/CuO/ZnO of the interface. Several researchers reported that Ti 3 C 2 Tx MXene exhibited the electronic properties of metallic. ,,, It can become a semiconductor depending on the existence of the hydroxyl (−OH), oxygen (−O), or fluorine (−F) groups at the surface termination of the Ti 3 C 2 Tx MXene. ,, In our work, the Ti 3 C 2 Tx MXene sensing behavior shows the properties of a p-type semiconductor since the resistance of pristine Ti 3 C 2 Tx MXene sensor increases after exposure to electron donating-NH 3 . In the case of GO, CuO, and ZnO in this work, they show n-type conductivity.…”

Section: Resultsmentioning

confidence: 61%

“…20,27,57,66 It can become a semiconductor depending on the existence of the hydroxyl (−OH), oxygen (−O), or fluorine (−F) groups at the surface termination of the Ti 3 C 2 Tx MXene. 28,95,96 In our work, the Ti 3 C 2 Tx MXene sensing behavior shows the properties of a p-type semiconductor since the resistance of pristine Ti 3 C 2 Tx MXene sensor increases after exposure to electron donating-NH 3 . In the case of GO, CuO, and ZnO in this work, they show n-type conductivity.…”

Section: Gas-sensing Mechanismmentioning

confidence: 60%

Room-Temperature Ammonia Gas Sensor Based on Ti₃C₂Tx MXene/Graphene Oxide/CuO/ZnO Nanocomposite

Seekaew,

Kamlue,

Wongchoosuk

2023

ACS Appl. Nano Mater.

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Two-dimensional (2D) Ti3C2Tx Mxene has currently demonstrated significant potential for gas sensing application with a high signal-to-noise ratio at room temperature. Herein, we present the mixture of popular NH3 sensing materials such as graphene oxide (GO), copper oxide (CuO), and zinc oxide (ZnO) into Ti3C2Tx Mxene to be a high-performance NH3 gas sensor at room temperature. Various nanocomposites such as Mxene/GO, Mxene/ZnO, Mxene/CuO, Mxene/GO/ZnO, Mxene/GO/CuO, Mxene/ZnO/CuO, and Mxene/GO/ZnO/CuO were synthesized via the hydrothermal method and used as NH3 sensing materials in room-temperature gas sensors. The Ti3C2Tx MXene/GO/CuO/ZnO nanocomposite gas sensor exhibited the best NH3 gas sensor. The effects on the weight ratios of Ti3C2Tx MXene/GO/CuO/ZnO were also investigated, and the optimal Ti3C2Tx MXene/GO/CuO/ZnO weight ratio was determined to be 9:1:5:5. The optimal Ti3C2Tx MXene/GO/CuO/ZnO based gas sensor showed a high response of 96% at 200 ppm of NH3, humidity independence in the range of 30–70%RH, good linear relationship (R 2 = 0.998), low limit of detection of 4.1 ppm, and high selectivity to NH3 over several gases/VOCs including formaldehyde, ethanol, methanol, isopropanol, toluene, and acetone. The NH3-sensing mechanism was proposed based on the modulation of complex p–n heterojunctions via the electron accumulation layer in the n-type of GO/CuO/ZnO and the electron depletion layer in the p-type Ti3C2Tx Mxene.

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“…Here, surface functional groups provide many defects that give more active states to gas adsorbing, and layered structure offered an efficient electron transport channel, both beneficial for gas detecting. [ 28 ] Figure S1g,h in the Supporting Information shows the mapping results for Ti 3 C 2 T x and PFOTES‐Ti 3 C 2 T x ‐CNF. The successful action of both Ti 3 C 2 T x and PFOTES is demonstrated by the characteristic elements Ti and Si.…”

Section: Resultsmentioning

confidence: 99%

“…[ 35 ] In the structure of Ti 3 C 2 T x , the surface functional groups provide many defects that provide a more active state for gas adsorption, and the layered structure provides an efficient electron transport channel, both of which are favorable for gas detection. [ 28 ] The PFOTES‐CNF and PFOTES‐Ti 3 C 2 T x ‐CNF films were characterized by an automated specific surface area and porosity analyzer, and it was found that the pore size of PFOTES‐Ti 3 C 2 T x ‐CNF film was larger than that of PFOTES‐CNF film, which was mainly due to the effect of the layered structure and the presence of Ti 3 C 2 T x (Figure S8 , Supporting Information). The lamellar structure gave the material a larger pore size providing a more active state for gas adsorption and also effectively improved the adsorption performance of PFOTES‐Ti 3 C 2 T x ‐CNF films.…”

Section: Resultsmentioning

confidence: 99%

Gas‐Sensitive Cellulosic Triboelectric Materials for Self‐Powered Ammonia Sensing

et al. 2022

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Gas-sensitive materials are capable of dynamic identification and content monitoring of specific gases in the environment, and their applications in the field of gas sensing are promising. However, weak adsorption properties are the main challenge limiting the application of gas-sensitive materials. A highly adsorbent gas-sensitive cellulose nanofibril (CNF)-based triboelectric material with a layered structure is prepared here and it is applied to self-powered gas sensing. The layered structure of the triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane cellulose nanofiber (PFOTES-CNF)-based gas-sensitive material further enhances the adsorption of the material due to electrostatic adsorption in the electrostatic field induced by triboelectricity. It is found that the ammonia-sensitive material obtained by loading Ti 3 C 2 T x in PFOTES-CNF has a fast response/recovery (12/14 s), high sensitivity response (V air /V gas = 2.1), high selectivity response (37.6%), and low detection limit (10 ppm) for 100 ppm of ammonia gas. In addition, the ammonia-sensitive CNF-based triboelectric material can accurately identify NH 3 concentration changes in the range of 10-120 ppm and transmit the signal wirelessly to the user interface, facilitating real-time online monitoring of NH 3 in the environment. A novel strategy is provided here for designing and preparing high-performance gas-sensitive composites and the analysis of self-powered gas sensing is guided.

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Partially oxidized Ti3C2Tx MXene-sensitive material-based ammonia gas sensor with high-sensing performances for room temperature application

Cited by 27 publications

References 37 publications

V2CTX MXene-based hybrid sensor with high selectivity and ppb-level detection for acetone at room temperature

V2CTX MXene-based hybrid sensor with high selectivity and ppb-level detection for acetone at room temperature

Room-Temperature Ammonia Gas Sensor Based on Ti₃C₂Tx MXene/Graphene Oxide/CuO/ZnO Nanocomposite

Gas‐Sensitive Cellulosic Triboelectric Materials for Self‐Powered Ammonia Sensing

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Partially oxidized Ti3C2Tx MXene-sensitive material-based ammonia gas sensor with high-sensing performances for room temperature application

Cited by 27 publications

References 37 publications

V2CTX MXene-based hybrid sensor with high selectivity and ppb-level detection for acetone at room temperature

V2CTX MXene-based hybrid sensor with high selectivity and ppb-level detection for acetone at room temperature

Room-Temperature Ammonia Gas Sensor Based on Ti3C2Tx MXene/Graphene Oxide/CuO/ZnO Nanocomposite

Gas‐Sensitive Cellulosic Triboelectric Materials for Self‐Powered Ammonia Sensing

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Room-Temperature Ammonia Gas Sensor Based on Ti₃C₂Tx MXene/Graphene Oxide/CuO/ZnO Nanocomposite