Ultrafast NH3 gas sensor based on phthalocyanine-optimized non-covalent hybrid of carbon nanotubes with pyrrole

Gai, Shijie; Wang, Bin; Wang, Xiaolin; Zhang, Runze; Miao, Shoulei; Wu, Yiqun

doi:10.1016/j.snb.2021.131352

Cited by 56 publications

(22 citation statements)

References 59 publications

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“…According to the literature, we know that PPy is very sensitive toward amine-based compounds , and NH 3. , As results show, the Au-IDEs/S-PPyMPs, as well as Au-IDEs/S-PPyMPs/AgNPs, respond to MA, DMA, TMA, EA, and TEA. Clearly, the response of Au-IDEs/S-PPyMPs/AgNPs to NH 3 is better than that of tested amine-based compounds.…”

Section: Resultsmentioning

confidence: 74%

Design and Fabrication of a Gas Sensor Based on a Polypyrrole/Silver Nanoparticle Film for the Detection of Ammonia in Exhaled Breath of COVID-19 Patients Suffering from Acute Kidney Injury

et al. 2022

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One of the serious complications of COVID-19 is acute kidney injury (AKI), leading to a decrease in kidney function and even death. The concentration of ammonia (NH 3 ) in the exhaled breath (EB) of COVID-19 patients suffering from AKI symptoms will be significantly increased. In this work, the detection of breath NH 3 was performed at gold interdigital electrodes modified with a soluble polypyrrole microparticle and silver nanoparticle film (Au-IDEs/S-PPyMPs/AgNPs) as a noninvasive chemiresistor gas sensor. The response behavior of unmodified and modified gas sensors toward NH 3 and other interfering compounds was studied. The Au-IDEs/S-PPyMPs/AgNPs exhibited NH 3 detection in the linear dynamic range of 1.00−19.23 ppm, with a limit of detection of 0.12 ppm. Finally, the fabricated gas sensor was used to monitor the NH 3 concentration in the EB of COVID-19 patients suffering from AKI symptoms. For this purpose, the gas sensor was validated in 19 EB samples (seven COVID-19−positive patients, four COVID-19−negative patients, and eight post−COVID-19 patients). The gas sensor was directly exposed to the EB samples, followed by recording the changes in electrical resistance via a low-cost digital multimeter. The sensing mechanism was explained as the interaction between breath NH 3 and sensing materials. The breath NH 3 concentrations have a desirable correlation (R 2 = 0.8463) with the estimated glomerular filtration rate (eGFR) values in COVID-19−positive patients. The fabricated gas sensor can distinguish COVID-19−positive patients suffering from AKI symptoms from COVID-19−negative patients and post−COVID-19 patients. The present work can pave the way for the development of a simple and efficient analytical approach for COVID-19 patients with AKI without the need for sample pretreatment.

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Section: Resultsmentioning

confidence: 74%

Design and Fabrication of a Gas Sensor Based on a Polypyrrole/Silver Nanoparticle Film for the Detection of Ammonia in Exhaled Breath of COVID-19 Patients Suffering from Acute Kidney Injury

et al. 2022

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“…It is also worth noting that exposure times are relatively short in some of these examples, meaning that the steady state is sometimes not achieved [ 39 ]. The short response times reported by some studies in Table 1 are explained by either the ultra-thin film structure [ 35 ], the combination of the different elements of the composites [ 37 ], or the synergetic effect of the protonation process [ 40 ].…”

Section: Resultsmentioning

confidence: 99%

Phthalocyanines and Porphyrins/Polyaniline Composites (PANI/CuPctBu and PANI/TPPH2) as Sensing Materials for Ammonia Detection

et al. 2022

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We combined a conducting polymer, polyaniline (PANI), with an organic semiconducting macrocyclic (MCs) material. The macrocycles are the phthalocyanines and porphyrins used to tune the electrical properties of the PANI, which benefits from their ability to enhance sensor response. For this, we proceeded by a simple ultrasonically assisted reaction involving the two components, i.e., the PANI matrix and the MCs, to achieve the synthesis of the composite nanostructure PANI/MCs. The composite nanostructure has been characterized and deposited on interdigitated electrodes (IDEs) to construct resistive sensor devices. The isolated nanostructured composites present good electrical properties dominated by PANI electronic conductivity, and the characterization reveals that both components are present in the nanostructure. The experimental results obtained under gas exposures show that the composite nanostructures can be used as a sensing material with enhanced sensing properties. The sensing performance under different conditions, such as ambient humidity, and the sensor’s operating temperature are also investigated. Sensing behavior in deficient humidity levels and their response at different temperatures revealed unusual behaviors that help to understand the sensing mechanism. Gas sensors based on PANI/MCs demonstrate significant stability over time, but this stability is highly reduced after experiments in lower humidity conditions and at high temperatures.

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“…The fascinating physical and chemical properties such as stability, large band gap, high surface-to-volume ratio, the possibility of synthesizing different nanoforms, biodegradability, nontoxicity, and low cost of TiO 2 among other metal oxides make it the most promising gas/VOC sensing material. , Many researchers introduced a variety of TiO 2 morphologies including one-dimensional (1D), , two-dimensional (2D), and three-dimensional (3D). 3,4,9 1D nanomaterials, mainly TiO 2 nanotubes, have been reported as potential gas sensing materials ,, due to their extremely high effective surface area. However, their limited time stability, high working temperature (200–400 °C), and high reactivity to the traces of moisture inhibit the sensing characteristics. , …”

Section: Introductionmentioning

confidence: 99%

“…1,14 Many researchers introduced a variety of TiO 2 morphologies including one-dimensional (1D), 1,15 two-dimensional (2D), 9 and three-dimensional (3D). 3,4,9 1D nanomaterials, mainly TiO 2 nanotubes, have been reported as potential gas sensing materials 1,15,16 due to their extremely high effective surface area. However, their limited time stability, high working temperature (200−400 °C), and high reactivity to the traces of moisture inhibit the sensing characteristics.…”

Section: ■ Introductionmentioning

confidence: 99%

SrTiO₃–TiO₂ Heterostructured Nanotube Arrays for Ultrafast Ethanol Sensing

Bhardwaj

Hazra

2022

ACS Appl. Nano Mater.

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Diverse metal oxide semiconductors have bloomed in chemical sensing applications providing opportunities and challenges. In this work, SrTiO 3 −TiO 2 heterostructured nanotube arrays were well designed via the electrochemical synthesis of TiO 2 nanotubes, followed by a facile one-step hydrothermal route by varying the amount of Sr(OH) 2 •8H 2 O precursor (0.25−25 mM) to grow different quantities of SrTiO 3 on TiO 2 nanotubes. The crystalline nature, morphology, and synthesis mechanism of the nanotube array were fully elucidated. Vertically aligned SrTiO 3 − TiO 2 heterostructured nanotube arrays were then sandwiched between the Ti bottom electrode (substrate as well) and Au top electrode to fabricate the metal−insulator−metal type sensors. SrTiO 3 −TiO 2 nanotube sensors exhibited ethanol-selective behavior where the highly defective SrTiO 3 layer acted as the main sensitive material that interacted with target species like ethanol. The SrTiO 3 −TiO 2 heterostructured nanotube array sensor synthesized with 0.25 mM Sr(OH) 2 precursor exhibited an excellent response magnitude (R a /R g ) of ∼556 with an ultrafast response time of 0.4 s toward 50 ppm ethanol at an operating temperature of 150 °C. Moreover, the sensor exhibits excellent stability, a low detection limit of 2.94 ppb, and good selectivity. All the SrTiO 3 −TiO 2 heterostructured nanotube array sensors showed promising humidity-tolerant behavior, and negligible change in response was obtained in the presence of 80% humid ambient air. The mechanism behind the modulated VOC sensing characteristics was explained with the comprehensive effects of the larger specific surface area, high surface defects, and modulated oxygen vacancies coming from the SrTiO 3 modification in the nanotube structures.

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Ultrafast NH3 gas sensor based on phthalocyanine-optimized non-covalent hybrid of carbon nanotubes with pyrrole

Cited by 56 publications

References 59 publications

Design and Fabrication of a Gas Sensor Based on a Polypyrrole/Silver Nanoparticle Film for the Detection of Ammonia in Exhaled Breath of COVID-19 Patients Suffering from Acute Kidney Injury

Design and Fabrication of a Gas Sensor Based on a Polypyrrole/Silver Nanoparticle Film for the Detection of Ammonia in Exhaled Breath of COVID-19 Patients Suffering from Acute Kidney Injury

Phthalocyanines and Porphyrins/Polyaniline Composites (PANI/CuPctBu and PANI/TPPH2) as Sensing Materials for Ammonia Detection

SrTiO₃–TiO₂ Heterostructured Nanotube Arrays for Ultrafast Ethanol Sensing

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Ultrafast NH3 gas sensor based on phthalocyanine-optimized non-covalent hybrid of carbon nanotubes with pyrrole

Cited by 56 publications

References 59 publications

Design and Fabrication of a Gas Sensor Based on a Polypyrrole/Silver Nanoparticle Film for the Detection of Ammonia in Exhaled Breath of COVID-19 Patients Suffering from Acute Kidney Injury

Design and Fabrication of a Gas Sensor Based on a Polypyrrole/Silver Nanoparticle Film for the Detection of Ammonia in Exhaled Breath of COVID-19 Patients Suffering from Acute Kidney Injury

Phthalocyanines and Porphyrins/Polyaniline Composites (PANI/CuPctBu and PANI/TPPH2) as Sensing Materials for Ammonia Detection

SrTiO3–TiO2 Heterostructured Nanotube Arrays for Ultrafast Ethanol Sensing

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SrTiO₃–TiO₂ Heterostructured Nanotube Arrays for Ultrafast Ethanol Sensing