Facile synthesis of MgGa2O4/graphene composites for room temperature acetic acid gas sensing

He, Lifang; Gao, Cuiping; Yang, Lei; Zhang, Kui; Chu, Xiangcheng; Liang, Shiming; Zeng, Dawen

doi:10.1016/j.snb.2019.127453

Cited by 28 publications

(11 citation statements)

References 64 publications

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“…[238] In general, composite materials can consist of: i) an organic phase, typically in the form of conductive polymers; ii) an inorganic phase made of metal oxides, semiconductors and metal nanoparticles; and iii) carbon-based or 2D materials. The different combinations reported in literature (Figure 8a) include metal oxides with semiconductors, [43] polymers, [239,240] metalorganic frameworks [241] or carbon-based materials [205,207,[242][243][244] as well as polymers with carbon-based materials [245] or 2D materials. [235] An application-specific tuning of the composites hybrid properties can be achieved by varying synthetic routes and precursors, composition and morphological/interfacial characteristics.…”

Section: Compositesmentioning

confidence: 99%

Advances in Materials and Technologies for Gas Sensing from Environmental and Food Monitoring to Breath Analysis

Milone

Monteduro

Rizzato

et al. 2022

Advanced Sustainable Systems

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Figure 2. a) Pie chart illustrating the use of n-type and p-type metal oxides materials in gas sensing research (reproduced with permission. [23] Copyright 2014, Elsevier B.V.); b) schematics of a typical chemiresistors (e.g., based on WO 3 -films) (reproduced with permission. [55] Copyright 2007, IEEE); c) response of a solid-state impedance NO x gas sensor upon NO exposure (reproduced with permission. [56] Copyright 2003, Elsevier B.V.). d) Illustration of gas sensing through a mesoporous material with different analyte percolation ability (reproduced with permission. [24] Copyright 2013, Royal Society of Chemistry); e) grain size effect in n-type semiconducting metal oxide gas sensors (reproduced with permission under the term of CC-BY license. [57] Copyright 2012, the Authors, published by MDPI); f-h) crystalline ordered mesoporous WO 3 /Pt composites schematic and FESEM images (reproduced with permission. [47] Copyright 2018, Elsevier B.V.); i) typical response curves of In(III)-SnO 2 loaded cubic mesoporous graphitic carbon nitride sensor when exposed to toluene vapors at a working temperature of 200 °C; l,m) response to 50 ppm and 1 ppm toluene gas at 200 °C (reproduced with permission. [53] Copyright 2018, Elsevier B.V.).

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Section: Compositesmentioning

confidence: 99%

Advances in Materials and Technologies for Gas Sensing from Environmental and Food Monitoring to Breath Analysis

Milone

Monteduro

Rizzato

et al. 2022

Advanced Sustainable Systems

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“…Moreover, it delivered fast response/recovery time of 36 s/67 s, thereby is noted as encouraging research with a wide scope. In view of this, MgGa 2 O 4 /graphene composites were synthesized by simple hydrothermal route and utilized in the sensing of acetic acid at room temperature [ 406 ]. At 0.1 wt% graphene, the material displayed a high sensor response (R a /R g = 363.3 for 100 ppm; response/recovery time = 50 s/35 s) with a calculated LOD of 0.001 ppm.…”

Section: Nanostructures In Other Vocs Determinationsmentioning

confidence: 99%

Inorganic-Diverse Nanostructured Materials for Volatile Organic Compound Sensing

Shellaiah

Sun

2021

Sensors

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Environmental pollution related to volatile organic compounds (VOCs) has become a global issue which attracts intensive work towards their controlling and monitoring. To this direction various regulations and research towards VOCs detection have been laid down and conducted by many countries. Distinct devices are proposed to monitor the VOCs pollution. Among them, chemiresistor devices comprised of inorganic-semiconducting materials with diverse nanostructures are most attractive because they are cost-effective and eco-friendly. These diverse nanostructured materials-based devices are usually made up of nanoparticles, nanowires/rods, nanocrystals, nanotubes, nanocages, nanocubes, nanocomposites, etc. They can be employed in monitoring the VOCs present in the reliable sources. This review outlines the device-based VOC detection using diverse semiconducting-nanostructured materials and covers more than 340 references that have been published since 2016.

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“…The functionality and efficiency of chemiresistors are heavily dependent on the sensing layer. Carbonaceous materials [28], perovskite-structured (e.g., LaFeO 3 [29], MgGa 2 O 4 [30]), and metal oxide (ZnO [31], In 2 O 3 [32], SnO 2 [33]) semiconductors (usually doped or with a heterojunction structure) are among the most common class of materials used for SCFA detection. The reaction between the chemisorbed oxygen on the surface of the electrode with SCFAs releases electrons back to the sensing layer, and the resultant decreases in the width of the depletion and accumulation layers change the resistance of the sensor.…”

Section: Introductionmentioning

confidence: 99%

An impedance-based chemiresistor for the real-time detection of gut microbiota-generated short-chain fatty acids

Yavarinasab

Flibotte²,

Liu

et al. 2022

Preprint

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Short chain fatty acids (SCFAs) are key molecules produced by gut bacteria in the intestine, that are absorbed into the bloodstream and strongly influence human health. SCFA disruption and imbalances have been linked to many diseases; however, they are seldom used diagnostically as their detection requires extensive sample preparation and expensive equipment. In this work, an electrochemical sensor was developed to enable real time, quantitative measurement of SCFAs from complex samples in liquid phase without the need for extraction, evaporation, or destruction. An impedance based sensor for in vitro detection of acetic acid, propionic acid, and butyric acid (accounting for more than 95% of SCFAs in the intestine) was fabricated by the deposition of a ZnO and polyvinyl alcohol (PVA) on the surface of a microfabricated interdigitated gold electrode. The sensor was first exposed to a broad, physiologically relevant range of concentrations of SCFAs in isolation (0.5 to 20 mg/ml) and unlike previously published SCFA sensors that could detect only in gas form with the aid of evaporation, it was able to detect them directly in the liquid phase at room temperature. Electrochemical impedance spectroscopy analysis was then applied to the mixture of SCFAs prepared at different ratios and in complex media at concentrations ranging from 0.5 to 10 mg/ml, which showed the capability of the sensor to measure SCFAs in experimentally relevant mixture. The recorded faradaic responses were then used to train a fit to data model to utilize the sensor to screen human bacterial isolates and detect which species secrete SCFAs in vitro. This work will allow for the rapid and non destructive determination of the levels of SCFAs in complex biological samples, providing a miniaturized, highly stable, and highly sensitive sensor for real time monitoring applications.

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Facile synthesis of MgGa2O4/graphene composites for room temperature acetic acid gas sensing

Cited by 28 publications

References 64 publications

Advances in Materials and Technologies for Gas Sensing from Environmental and Food Monitoring to Breath Analysis

Advances in Materials and Technologies for Gas Sensing from Environmental and Food Monitoring to Breath Analysis

Inorganic-Diverse Nanostructured Materials for Volatile Organic Compound Sensing

An impedance-based chemiresistor for the real-time detection of gut microbiota-generated short-chain fatty acids

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