Recent Progress of Toxic Gas Sensors Based on 3D Graphene Frameworks

Dong, Qichao; Xiao, Min; Chu, Zengyong; Li, Guochen; Zhang, Ye

doi:10.3390/s21103386

Cited by 23 publications

(11 citation statements)

References 142 publications

(208 reference statements)

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“…The unique 3D porous structures of aerogels provide high porosity, ultralow density, and high specific surface area. [ 15 , 16 , 17 ] Conductive, compressible, and elastic aerogels have been considered as excellent candidates for fabricating flexible/wearable devices [ 18 , 19 , 20 , 21 ] such as piezoresistive sensors, [ 15 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 ] and energy harvesting devices. [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ] The flexible and compress 3D porous structure of aerogels can provide large numbers of adjustable contact areas which can modulate the electrical resistance under the external pressure.…”

Section: Introductionmentioning

confidence: 99%

Ultralight, Elastic, Hybrid Aerogel for Flexible/Wearable Piezoresistive Sensor and Solid–Solid/Gas–Solid Coupled Triboelectric Nanogenerator

et al. 2022

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Aerogels have been attracting wide attentions in flexible/wearable electronics because of their light weight, excellent flexibility, and electrical conductivity. However, multifunctional aerogel-based flexible/wearable electronics for human physiological/motion monitoring, and energy harvest/supply for mobile electronics, have been seldom reported yet. In this study, a kind of hybrid aerogel (GO/CNT HA) based on graphene oxide (GO) and carboxylated multiwalled carbon nanotubes (CMWCNTs) is prepared which can not only used as piezoresistive sensors for human motion and physiological signal detections, but also as high performance triboelectric nanogenerator (TENG) coupled with both solid-solid and gas-solid contact electrifications (CE). The repeatedly loading-unloading tests with 20 000 cycles exhibit its high and ultrastable piezoresistive sensor performances. Moreover, when the obtained aerogel is used as the electrode of a TENG, high electric output performance is produced due to the synergistic effect of solid-solid, and gas-solid interface CEs (3D electrification: solid-solid interface CE between the two solid electrification layers; gas-solid interface CE between the inner surface of GO/CNT HA and the air filled in the aerogel pores). This kind of aerogel promises good applications for human physiological/motion monitoring and energy harvest/supply in flexible/wearable electronics such as piezoresistive sensors and flexible TENG.

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Section: Introductionmentioning

confidence: 99%

Ultralight, Elastic, Hybrid Aerogel for Flexible/Wearable Piezoresistive Sensor and Solid–Solid/Gas–Solid Coupled Triboelectric Nanogenerator

et al. 2022

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“…As the most important component of two-dimensional (2D) carbon-based material, graphene possesses superior thermal conductivity (~5000 W/m·K), high specific surface area (2630 m 2 /g), chemical stability, and high electron mobility, as well as excellent mechanical and optical properties, which has great application potential in many fields [ 17 ]. However, their direct application as excellent adsorbents, anode materials, and mechanical devices suffers from limitation, as a serious loss in surface area occurs due to the re-stacking problem resulting from π-π interaction between graphene layers and the Van der Waals force [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Synthesis and Application of Three-Dimensional Graphene-Based Aerogels

et al. 2022

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Three-dimensional graphene-based aerogels (3D GAs), combining the intrinsic properties of graphene and 3D porous structure, have attracted increasing research interest in varied fields with potential application. Some related reviews focusing on applications in photoredox catalysis, biomedicine, energy storage, supercapacitor or other single aspect have provided valuable insights into the current status of Gas. However, systematic reviews concentrating on the diverse applications of 3D GAs are still scarce. Herein, we intend to afford a comprehensive summary to the recent progress in the preparation method (template-free and template-directed method) summarized in Preparation Strategies and the application fields (absorbent, anode material, mechanical device, fire-warning material and catalyst) illustrated in Application of 3D GAs with varied morphologies, structures, and properties. Meanwhile, some unsettled issues, existing challenges, and potential opportunities have also been proposed in Future Perspectives to spur further research interest into synthesizing finer 3D GAs and exploring wider and closer practical applications.

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“…Graphene, with a two-dimensional honeycomb lattice structure, has excellent electrical [ 29 , 30 ] and sensing [ 31 ] properties suitable for flexible electronic devices [ 32 ]. Shi et al [ 28 ] prepared graphene oxide (GO)-coated polyurethane composite foam with different pore sizes using the self-assembly method.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Wrinkles for Tunable Strain Sensing Based on Programmable, Anisotropic, and Patterned Graphene Hybrids

Chu

Gong

et al. 2022

Polymers

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Flexible, stretchable, wearable, and stable electronic materials are widely studied, owing to their applications in wearable devices and the Internet of Things. Because of the demands for both strain-insensitive resistors and high gauge factor (GF) strain-sensitive materials, anisotropic strain sensitivity has been an important aspect of electronic materials. In addition, the materials should have adjustable strain sensitivities. In this work, such properties are demonstrated in reduced graphene oxide (RGO) with hierarchical oriented wrinkle microstructures, generated using the two-step shrinkage of a rubber substrate. The GF values range from 0.15 to 28.32 at 100% strain. For device demonstrations, macrostructure patterns are designed to prepare patterned wrinkling graphene at rubber substrate (PWG@R). Serpentiform curves can be used for the constant-value resistor, combined with the first-grade wrinkles. Strip lines can increase the strain-sensing property, along with the second-grade wrinkles. The patterned sensor exhibits improved GF values range from 0.05 to 49.5. The assembled sensor shows an excellent stability (>99% retention after 600 cycles) with a high GF (49.5). It can monitor the vital signs of the throat and wrist and sense large motions of fingers. Thus, PWG@R-based strain sensors have great potential in various health or motion monitoring fields.

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Recent Progress of Toxic Gas Sensors Based on 3D Graphene Frameworks

Cited by 23 publications

References 142 publications

Ultralight, Elastic, Hybrid Aerogel for Flexible/Wearable Piezoresistive Sensor and Solid–Solid/Gas–Solid Coupled Triboelectric Nanogenerator

Ultralight, Elastic, Hybrid Aerogel for Flexible/Wearable Piezoresistive Sensor and Solid–Solid/Gas–Solid Coupled Triboelectric Nanogenerator

Recent Advances in the Synthesis and Application of Three-Dimensional Graphene-Based Aerogels

Hierarchical Wrinkles for Tunable Strain Sensing Based on Programmable, Anisotropic, and Patterned Graphene Hybrids

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