Enhancement in room temperature ammonia sensing properties of naphthalene diimides through core expansion

Ali, Salman; Jameel, Mohammed; Oldham, Glenn; Gupta, Akhil; Shafiei, Mahnaz; Langford, Steven J.

doi:10.1039/d1tc05362k

Cited by 11 publications

(5 citation statements)

References 44 publications

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“…In recent years, a variety of emerging sensitive materials (graphene, organic semiconductor, transition metal dichalcogenides, etc) have been explored and used in room-temperature gas sensors [11][12][13][14][15]. For instance, Ali et al prepared a gas sensor based on nanoporous naphthalene diimide thin layer for the NH 3 detection at room temperature [16].…”

Section: Introductionmentioning

confidence: 99%

Enhanced ammonia sensing response based on Pt-decorated Ti₃C₂T _x /TiO₂ composite at room temperature

Zhang¹,

Wang²,

Zou³

et al. 2023

Nanotechnology

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Herein, we report a Pt-decorated Ti3C2Tx/TiO2 gas sensor for the enhanced NH3 sensing response at room temperature. Firstly, the TiO2 nanosheets (NSs) are in-situ grown onto the two-dimensional (2D) Ti3C2Tx by hydrothermal treatment. Similar to Ti3C2Tx sensor, the Ti3C2Tx/TiO2 sensor has a positive resistance variation upon exposure to NH3, but with slight enhancement in response. However, after the loading of Pt nanoparticles (NPs), the Pt-Ti3C2Tx/TiO2 sensor shows a negative response with significantly improved NH3 sensing performance. The shift in response direction indicates that the dominant sensing mechanism has changed under the sensitization effect of Pt NPs. At room temperature, the response of Pt-Ti3C2Tx/TiO2 gas sensor to 100 ppm NH3 is about 45.5%, which is 13.8- and 10.8- times higher than those of Ti3C2Tx and Ti3C2Tx/TiO2 gas sensors, respectively. The experimental detection limit of the Pt-Ti3C2Tx/TiO2 gas sensor to detect NH3 is 10 ppm, and the corresponding response is 10.0%. In addition, the Pt-Ti3C2Tx/TiO2 gas sensor shows the fast response/recovery speed (23/34 s to 100 ppm NH3), high selectivity and good stability. Considering both the response value and the response direction, the corresponding gas-sensing mechanism is also deeply discussed. This work is expected to shed a new light on the development of noble metals decorated MXene-metal oxide gas sensors.

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Section: Introductionmentioning

confidence: 99%

Enhanced ammonia sensing response based on Pt-decorated Ti₃C₂T _x /TiO₂ composite at room temperature

Zhang¹,

Wang²,

Zou³

et al. 2023

Nanotechnology

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“…Even lower concentrations of NO X at parts per billion (ppb) are required, as they can be used to detect lung tissue infections [ 5 ]. Many types of sensors exist, such as amperometric and electrochemical, but their curbed LOD or higher operating temperature is shown to be limiting for extremely sensitive applications [ 6 , 7 ]. One of the many driving forces, apart from the many inherent advantages, are metal oxide semiconductor-based sensors, which have been the most researched type of gas sensing among all the other types [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Sub PPM Detection of NO2 Using Strontium Doped Bismuth Ferrite Nanostructures

et al. 2023

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The present work investigates the NO2 sensing properties of acceptor-doped ferrite perovskite nanostructures. The Sr-doped BiFeO3 nanostructures were synthesized by a salt precursor-based modified pechini method and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The synthesized materials were drop coated to fabricate chemoresistive gas sensors, delivering a maximum sensitivity of 5.2 towards 2 ppm NO2 at 260 °C. The recorded values of response and recovery time are 95 s and 280 s, respectively. The sensor based on Bi0.8Sr0.2FeO3–δ (BSFO) that was operated was shown to have a LOD (limit of detection) as low as 200 ppb. The sensor proved to be promising for repeatability and selectivity measurements, indicating that the Sr doping Bismuth ferrite could be a potentially competitive material for sensing applications. A relevant gas-sensing mechanism is also proposed based on the surface adsorption and reaction behavior of the material.

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“…Increased conductivity, porosity, and catalytic activity are the benefits of using composites in applications requiring gas sensing [ 20 ]. There are various organic materials that have recently been exploited for gas sensing applications [ 21 , 22 ]. Metal oxide gas sensors initially demonstrate strong sensitivity to harmful chemicals, but they require higher working temperatures.…”

Section: Introductionmentioning

confidence: 99%

Exploitation of SnO2/Polypyrrole Interface for Detection of Ammonia Vapors Using Conductometric and Optical Techniques: A Theoretical and Experimental Analysis

Gahlot

Paliwal

Kapoor

2022

Sensors

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This study describes the construction of a lab-built Surface Plasmon Resonance (SPR) system for gas sensing applications employing a highly sensitive and trustworthy optical approach. The nanocomposite thin film of tin oxide (SnO2) and Polypyrrole (PPy) were prepared for sensing highly toxic gas, i.e., ammonia (NH3) gas. The gas sensor was validated by both optical and conductometric techniques of gas sensing. The optical SPR gas sensor is based on the change in refractive index at the SnO2/Polypyrrole (PPy) interface with gas adsorption (NH3). The thickness of SnO2 and Polypyrrole thin films was optimised using theoretical calculations for a sharp SPR reflectance curve. The manuscript also offers theoretical SPR curves for different PPy and SnO2 layer thicknesses. To support the theoretical conclusions, the effects of NH3 gas on the prism/Au/SnO2/Polypyrrole system were also investigated experimentally. In comparison to other research described in the literature, it was observed that the constructed sensor’s sensitivity was higher. The obtained results demonstrate the utility of the SPR setup in the investigation of the interactions of adhered gas molecules with dielectrics and gas sensing. For conductometric gas sensing studies, the film having optimised thicknesses for sharp SPR reflectance curves was separately prepared on Interdigitated Electrodes. At a low working temperature of roughly 150 °C, the sensing response of the constructed film was observed and found to be maximal (60).

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Enhancement in room temperature ammonia sensing properties of naphthalene diimides through core expansion

Abstract: An amperometric type sensor whose active layer is derived from a tetra core-substituted organic semiconductor, naphthalene diimide (NDI-CN4), has been evaluated for ammonia gas (3, 6, 25 and 50 ppm)...

Cited by 11 publications

References 44 publications

Enhanced ammonia sensing response based on Pt-decorated Ti₃C₂T _x /TiO₂ composite at room temperature

Enhanced ammonia sensing response based on Pt-decorated Ti₃C₂T _x /TiO₂ composite at room temperature

Sub PPM Detection of NO2 Using Strontium Doped Bismuth Ferrite Nanostructures

Exploitation of SnO2/Polypyrrole Interface for Detection of Ammonia Vapors Using Conductometric and Optical Techniques: A Theoretical and Experimental Analysis

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Enhancement in room temperature ammonia sensing properties of naphthalene diimides through core expansion

Abstract: An amperometric type sensor whose active layer is derived from a tetra core-substituted organic semiconductor, naphthalene diimide (NDI-CN4), has been evaluated for ammonia gas (3, 6, 25 and 50 ppm)...

Cited by 11 publications

References 44 publications

Enhanced ammonia sensing response based on Pt-decorated Ti3C2T x /TiO2 composite at room temperature

Enhanced ammonia sensing response based on Pt-decorated Ti3C2T x /TiO2 composite at room temperature

Sub PPM Detection of NO2 Using Strontium Doped Bismuth Ferrite Nanostructures

Exploitation of SnO2/Polypyrrole Interface for Detection of Ammonia Vapors Using Conductometric and Optical Techniques: A Theoretical and Experimental Analysis

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Enhanced ammonia sensing response based on Pt-decorated Ti₃C₂T _x /TiO₂ composite at room temperature

Enhanced ammonia sensing response based on Pt-decorated Ti₃C₂T _x /TiO₂ composite at room temperature