Flower-like In2O3 modified by reduced graphene oxide sheets serving as a highly sensitive gas sensor for trace NO2 detection

Liu, Jie; Li, Shan; Zhang, Bo; Wang, Yinglin; Gao, Yuan; Liang, Xishuang; Wang, Yue

doi:10.1016/j.jcis.2017.05.053

Cited by 122 publications

(64 citation statements)

References 44 publications

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“…3-D metal oxides like nanoflower and nanosphere were used to synthesize nanocomposites with graphene and its derivatives by the hydrothermal and sol-gel method [15,[68][69][70].…”

Section: Synthesis Of Graphene/3-d Metal Oxides Compositesmentioning

confidence: 99%

“…In the composite, rGO formed local p-n heterojunctions enhancing the gas sensing performance significantly. The rGO/In 2 O 3 composite exhibited an excellent selectivity towards NO 2 in the wide concentration range from 10 ppb to 1 ppm [68]. α-Fe 2 O 3 /rGO nanocomposites with nanosphere-like α-Fe 2 O 3 structure were synthesized by a hydrothermal route at 120°C.…”

Section: Synthesis Of Graphene/3-d Metal Oxides Compositesmentioning

confidence: 99%

“…ZnO nanoparticles occupied the second position to use as a nanocomposite with graphene and its derivatives other metal oxide Figure 10. SEM images of (a) rGO/flower-like hierarchical ZnO composites [15], (b) rGO/In 2 O 3 nanoflower composite [68], (c) rGO/α-Fe 2 O 3 nanosphere [69], and (d) graphene-wrapped WO 3 nanosphere [70]. Table 1.…”

Section: Assessments Of Gas/vapor Sensing Performances 31 Sensing Pementioning

confidence: 99%

“…Figure 14. NO 2 response of (a) rGO/ZnO nanoflower (1.7% rGO in ZnO) at 100°C [15] and (b) rGO/In 2 O 3 nanoflower at 74°C [68].…”

Section: Sensing Performance Of Graphene/2-d Metal Oxides Compositesmentioning

confidence: 99%

See 3 more Smart Citations

A Review on Metal Oxide-Graphene Derivative Nano-Composite Thin Film Gas Sensors

Hazra¹,

Samane²,

Basu³

2020

Multilayer Thin Films - Versatile Applications for Materials Engineering

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Most of the available commercial solid-state gas/vapor sensors are based on metal oxide semiconductors. Metal oxides (MOs) change their conductivity while exposed to gas or vapors ambient can be utilized as gas or vapor sensing materials. In recent days, graphene has attracted tremendous attention owing to its twodimensional structure with an extremely high surface to volume ratio, electron mobility, and thermal conductivity. However, intrinsic graphene is relatively inefficient for the adsorption of gas/vapor molecules. In this regard, graphene oxide (GO) and reduced graphene oxide (rGO), which are graphene species functionalized with different oxygen groups that offer a higher amount of adsorption sites improving the sensitivity of the film. Up to now, many research groups across the globe have reported the promising performance towards gas detection using various GO/rGO-metal oxide nanocomposites. This chapter reviews the composites of graphene oxide or reduced graphene oxide and metal oxides in nanoscale dimensions (0-D, 1-D, 2-D, and 3-D) for gas sensing applications considering two specific focus areas, that is, synthesis of nanocomposites and performance assessment for gas/vapor sensing.

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“…3-D metal oxides like nanoflower and nanosphere were used to synthesize nanocomposites with graphene and its derivatives by the hydrothermal and sol-gel method [15,[68][69][70].…”

Section: Synthesis Of Graphene/3-d Metal Oxides Compositesmentioning

confidence: 99%

Section: Synthesis Of Graphene/3-d Metal Oxides Compositesmentioning

confidence: 99%

Section: Assessments Of Gas/vapor Sensing Performances 31 Sensing Pementioning

confidence: 99%

“…Figure 14. NO 2 response of (a) rGO/ZnO nanoflower (1.7% rGO in ZnO) at 100°C [15] and (b) rGO/In 2 O 3 nanoflower at 74°C [68].…”

Section: Sensing Performance Of Graphene/2-d Metal Oxides Compositesmentioning

confidence: 99%

See 2 more Smart Citations

A Review on Metal Oxide-Graphene Derivative Nano-Composite Thin Film Gas Sensors

Hazra¹,

Samane²,

Basu³

2020

Multilayer Thin Films - Versatile Applications for Materials Engineering

View full text Add to dashboard Cite

show abstract

“…An optimum ratio of the composition and the fine nanostructure will contribute to obtaining better gas-sensing properties. A gas sensor with 3 wt % reduced graphene oxide (rGO) incorporated into In 2 O 3 showed a rapid response, an improved stability and a low limit of detection of NO 2 (10 ppb) [29]. ZnO 1−x /rGO composites with 2 wt % rGO had enhanced gas sensing properties compared with pure ZnO, as indicated by an enhanced sensitivity and an improved response/recovery speed [30].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and acetone sensing properties of ZnFe₂O₄/rGO gas sensors

Wu¹,

Luo²,

Liu³

et al. 2019

Beilstein J. Nanotechnol.

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Hollow spheres of pure ZnFe2O4 and of composites of ZnFe2O4 and reduced graphene oxide (rGO) with different rGO content were prepared via a simple solvothermal method followed by a high-temperature annealing process in an inert atmosphere. The X-ray diffraction analysis confirmed that the introduction of rGO had no effect on the spinel structure of ZnFe2O4. In addition, the results of field-emission scanning electron microscopy and (high-resolution) transmission electron microscopy indicated that the synthesized samples had the structure of hollow spheres distributed uniformly onto rGO nanosheets. The diameters of the spheres were determined as about 600–1000 nm. The gas sensing test revealed that the introduction of rGO improved the performance of the sensing of acetone to low concentration, and the ZnFe2O4/rGO composite gas sensor containing 0.5 wt % of rGO exhibited a high sensitivity in sensing test using 0.8–100 ppm acetone at 200 °C. The response of the 0.5 wt % ZnFe2O4/rGO sensor to 0.8 ppm acetone was 1.50, and its response to 10 ppm acetone was 8.18, which is around 2.6 times more pronounced than the response of pure ZnFe2O4 (10 ppm, 3.20). Moreover, the sensor showed a wide linear range and good selectivity.

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Process Pathway Controlled Evolution of Phase and Van‐der‐Waals Epitaxy in In/In₂O₃ on Graphene Heterostructures

Elibol

Mangler

Gupta

et al. 2020

Adv Funct Materials

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Many applications of 2D materials require deposition of non-2D metals and metal-oxides onto the 2D materials. Little is however known about the mechanisms of such non-2D/2D interfacing, particularly at the atomic scale. Here, atomically resolved scanning transmission electron microscopy (STEM) is used to follow the entire physical vapor deposition (PVD) cycle of application-relevant non-2D In/In 2 O 3 nanostructures on graphene. First, a "quasi-in-situ" approach with indium being in situ evaporated onto graphene in oxygen-/water-free ultra-high-vacuum (UHV) is employed, followed by STEM imaging without vacuum break and then repeated controlled ambient air exposures and reloading into STEM. This allows stepwise monitoring of the oxidation of specific In particles toward In 2 O 3 on graphene. This is then compared with conventional, scalable ex situ In PVD onto graphene in high vacuum (HV) with significant residual oxygen/water traces. The data shows that the process pathway difference of oxygen/water feeding between UHV/ambient and HV fabrication drastically impacts not only non-2D In/In 2 O 3 phase evolution but also In 2 O 3 /graphene out-of-plane texture and in-plane rotational van-der-Waals epitaxy. Since non-2D/2D heterostructures' properties are intimately linked to their structure and since influences like oxygen/water traces are often hard to control in scalable fabrication, this is a key finding for non-2D/2D integration process design.

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Flower-like In2O3 modified by reduced graphene oxide sheets serving as a highly sensitive gas sensor for trace NO2 detection

Cited by 122 publications

References 44 publications

A Review on Metal Oxide-Graphene Derivative Nano-Composite Thin Film Gas Sensors

A Review on Metal Oxide-Graphene Derivative Nano-Composite Thin Film Gas Sensors

Synthesis and acetone sensing properties of ZnFe₂O₄/rGO gas sensors

Process Pathway Controlled Evolution of Phase and Van‐der‐Waals Epitaxy in In/In₂O₃ on Graphene Heterostructures

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Flower-like In2O3 modified by reduced graphene oxide sheets serving as a highly sensitive gas sensor for trace NO2 detection

Cited by 122 publications

References 44 publications

A Review on Metal Oxide-Graphene Derivative Nano-Composite Thin Film Gas Sensors

A Review on Metal Oxide-Graphene Derivative Nano-Composite Thin Film Gas Sensors

Synthesis and acetone sensing properties of ZnFe2O4/rGO gas sensors

Process Pathway Controlled Evolution of Phase and Van‐der‐Waals Epitaxy in In/In2O3 on Graphene Heterostructures

Contact Info

Product

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Synthesis and acetone sensing properties of ZnFe₂O₄/rGO gas sensors

Process Pathway Controlled Evolution of Phase and Van‐der‐Waals Epitaxy in In/In₂O₃ on Graphene Heterostructures