Core-shell Au@SiO2 nanocrystals doped PANI for highly sensitive, reproducible and flexible ammonia sensor at room temperature

Chen, Gangrong; Resource, Yongtao Yuan; Lang, Ming; Lv, Zhen; Ma, Weilin; Gu, Naiting; Liu, Hong; Fang, Jingzhong; Zhang, Haibin; Cheng, Yuntao

doi:10.1016/j.apsusc.2022.153821

Cited by 25 publications

(8 citation statements)

References 42 publications

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“…Figure 10a,b explicitly demonstrates the calculation associated with it for both the maximum and minimum ammonia concentration. The values attribute to a much faster response and moderately fast relaxation of the sensor compared with the other reports 58,59 . The next figure (i.e., Figure 10c) displays a bar plot showing the selectivity study of the PRZ3 sample by exposing it to different target gas/VOCs (e.g., IPA, acetone, ethanol, toluene, CCl4, and n‐hexane) at their lowest (250 ppb) and highest (100 ppm) concentrations.…”

Section: Resultsmentioning

confidence: 91%

“…The values attribute to a much faster response and moderately fast relaxation of the sensor compared with the other reports. 58,59 The next figure (i.e., Figure 10c) displays a bar plot showing the selectivity study of the PRZ3 sample by exposing it to different target gas/VOCs (e.g., IPA, acetone, ethanol, toluene, CCl4, and n-hexane) at their lowest (250 ppb) and highest (100 ppm) concentrations. This investigation was nothing but a comparative study that helps to understand at which gas/VOC the sensor gained the highest amount of response.…”

Section: Response/recovery Time Calculation and Selectivity Studymentioning

confidence: 99%

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Superior ammonia sensing properties of PET‐supported polyaniline/reduced graphene oxide/zinc ferrite ternary nanocomposite thin film at room temperature

Kundu,

Majumder,

Pal Chowdhury

2023

J of Applied Polymer Sci

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This article introduces a ternary nanocomposite‐based flexible thin film ammonia sensor developed on transparent polyethylene terephthalate (PET) substrate in the well‐known in situ chemical oxidative polymerization technique. The nanocomposite consists of three different materials: polyaniline (PANI), reduced graphene oxide (rGO), and zinc ferrite (ZF). Keeping the PANI amount constant, seven PANI/rGO/ZF (PRZ) samples are produced by performing stoichiometric variation between rGO and ZF. Later on, various structural, morphological, and spectroscopic analysis of all the composite materials is accomplished with field emission scanning electron microscopy (FESEM), high‐resolution transmission electron microscopy (HRTEM), X‐ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and ultraviolet–visible spectroscopy (UV–Vis). The sensing performance of the as‐produced sensors toward ammonia (NH3) is examined in the concentration range from 250 ppb to 100 ppm. The study reveals the excellent sensing ability of the PRZ3 sensor (rGO = 30%, ZF = 20%) achieving minimum and maximum responsivity values of ~51% and ~1052%, respectively, at the lowest (250 ppb) and highest (100 ppm) concentration of ammonia. The sensor also exhibits admirable repeatability, good dynamic responsivity, rapid response (tres ~2.9–5 s), moderately faster recovery (trec ~37.9–69.7 s), superb linearity against ppm variation (R2 ~ 0.989), low detection limit (~123 ppb), and exceptional selectivity toward ammonia. The substrate temperature variation divulges that room temperature (30°C) is the ideal temperature for getting outstanding responsivity of the sensor. The study is further accompanied by humidity variation in the incoming air and bending flexibility test of the substrate. A compulsory and legitimate model regarding the sensing mechanism is presented at the end.

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Section: Resultsmentioning

confidence: 91%

Section: Response/recovery Time Calculation and Selectivity Studymentioning

confidence: 99%

Superior ammonia sensing properties of PET‐supported polyaniline/reduced graphene oxide/zinc ferrite ternary nanocomposite thin film at room temperature

Kundu,

Majumder,

Pal Chowdhury

2023

J of Applied Polymer Sci

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“…53 Besides, loading with noble metals can significantly enhance the surface catalytic activity. For instance, Chen et al reported core−shell Au@SiO 2 nanocrystals-doped PANI, which could achieve a low-level detection limit of ∼10 ppb with a fast response time of 35 s. 54 The Au-induced sensing capability enhancement was mainly attributed to a spill-over-related sensitization mechanism. 55,56 Au nanopar- ticles (AuNPs) can adsorb NH 3 molecules on the top side of the Au (111) surface with the interaction between a p-orbital from NH 3 and a d-orbital of gold atoms.…”

Section: Structural Design Of Pani-based Sensorsmentioning

confidence: 99%

Section: Structural Design Of Pani-based Sensorsmentioning

confidence: 99%

Polyaniline-Based Biological and Chemical Sensors: Sensing Mechanism, Configuration Design, and Perspective

Yang

Wang

Cao

et al. 2023

ACS Appl. Electron. Mater.

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By virtue of its tunable electrical conductivity, remarkable solution processing capability, and great biocompatibility, polyaniline (PANI) has been recognized as an attractive active material for use in biological and chemical ("bio/chemical") sensors. This Spotlight article focuses on the structure and characteristics of PANI-based materials and the corresponding device-level sensing performance. PANI-based bio/chemical sensors, such as chemi-resistive sensors, electrochemical sensors, and transistor-based sensors, are systematically elucidated based on device architecture and sensing mechanism. The corresponding structure−function relationships among PANI doping state, microscopic structure, local crystallinity, and their functionalities in three types of sensors have been systematically elaborated. Finally, the state-of-the-art progress in applications of these sensors and the corresponding breakthroughs in a broader context are outlined from the challenges to strategies.

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“…In electrochemical methods, the construction of highly sensitive catalysts is crucial. For ammonia, the sensitive materials can be categorized as conductive polymers, carbon-based materials, nanometal, nanometal oxides, and the combinations of them [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Pt has been considered to be the metal catalyst with the best performance for ammonia electro-oxidation [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Ultramicro Interdigitated Array Electrode Chip with Optimized Construction for Detection of Ammonia Nitrogen in Water

Zhao

Cong

et al. 2023

Micromachines

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Ammonia nitrogen is a common contaminant in water and its determination is important for environmental protection. In this paper, an electrochemical sensor based on an ultramicro interdigitated array electrode (UIAE) chip with optimized construction was fabricated with Micro-Electro-Mechanical System (MEMS) technology and developed to realize the detection of ammonia nitrogen in water. The effects of spacing-to-width ratio and width of the working electrode on UIAE’s electrochemical characteristics and its ammonia nitrogen detection performance were studied by finite element simulation and experiment. The results demonstrated that the smaller the spacing-to-width ratio, the stronger generation–collection effect, and the smaller the electrode width, the stronger the edge effect, which led to an easier steady-state reach, a higher response current, and better ammonia nitrogen determination performance. The fabricated UIAE chip with optimized construction showed the linear detection range of 0.15 mg/L~2.0 mg/L (calculated as N), the sensitivity of 0.4181 μA·L·mg−1, and good anti-interference performance, as well as a long lifetime. UIAE based on bare Pt was successfully applied to ammonia nitrogen detection in water by optimizing structure, which might broaden the methods of ammonia nitrogen detection in water.

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Core-shell Au@SiO2 nanocrystals doped PANI for highly sensitive, reproducible and flexible ammonia sensor at room temperature

Cited by 25 publications

References 42 publications

Superior ammonia sensing properties of PET‐supported polyaniline/reduced graphene oxide/zinc ferrite ternary nanocomposite thin film at room temperature

Superior ammonia sensing properties of PET‐supported polyaniline/reduced graphene oxide/zinc ferrite ternary nanocomposite thin film at room temperature

Polyaniline-Based Biological and Chemical Sensors: Sensing Mechanism, Configuration Design, and Perspective

Ultramicro Interdigitated Array Electrode Chip with Optimized Construction for Detection of Ammonia Nitrogen in Water

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