Reduced graphene oxide/hierarchical flower-like zinc oxide hybrid films for room temperature formaldehyde detection

Li, Xian; Wang, Jing; Xie, Dan; Xu, Jianlong; Dai, Ruixuan; Liu, Xiang; Zhu, Hongwei; Jiang, Yadong

doi:10.1016/j.snb.2015.07.102

Cited by 70 publications

(36 citation statements)

References 27 publications

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“…Meanwhile, rGO has also great advantages of low-cost and bulk quantity production [ 7 ]. Up to now, different ZnO nanomaterials, such as nanoflowers [ 6 , 9 ], nanoparticles [ 7 , 16 , 17 ], nanofibers [ 8 ], nanorods [ 11 , 18 , 19 ], and quantum dots [ 20 , 21 ], were designed and used for ZnO/rGO gas-sensing hybrid materials preparation, and the enhanced sensing performances for various gases including nitrogen dioxide (NO 2 ), hydrogen (H 2 ), formaldehyde (HCHO), methane (CH 4 ), and ethyl acetate have been reported and analyzed, which might be ascribed to more adsorption sites and creation of p-n heterojunctions, etc. [ 8 – 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…[ 8 – 10 ]. However, despite their improved advantageous characteristics, these sensors still suffer from several shortcomings more or less, such as high operating temperature (more than 100 °C) [ 8 , 11 , 16 – 18 ], baseline drift [ 9 ], and long recovery time [ 16 ]. Therefore, further enhancement of gas-sensing properties is still strongly required.…”

Section: Introductionmentioning

confidence: 99%

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ZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room Temperature

et al. 2016

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ZnO nanoparticles and graphene oxide (GO) thin film were deposited on gold interdigital electrodes (IDEs) in sequence via simple spraying process, which was further restored to ZnO/reduced graphene oxide (rGO) bilayer thin film by the thermal reduction treatment and employed for ammonia (NH3) detection at room temperature. rGO was identified by UV-vis absorption spectra and X-ray photoelectron spectroscope (XPS) analyses, and the adhesion between ZnO nanoparticles and rGO nanosheets might also be formed. The NH3-sensing performances of pure rGO film and ZnO/rGO bilayer films with different sprayed GO amounts were compared. The results showed that ZnO/rGO film sensors exhibited enhanced response properties, and the optimal GO amount of 1.5 ml was achieved. Furthermore, the optimal ZnO/rGO film sensor showed an excellent reversibility and fast response/recovery rate within the detection range of 10–50 ppm. Meanwhile, the sensor also displayed good repeatability and selectivity to NH3. However, the interference of water molecules on the prepared sensor is non-ignorable; some techniques should be researched to eliminate the effect of moisture in the further work. The remarkably enhanced NH3-sensing characteristics were speculated to be attributed to both the supporting role of ZnO nanoparticles film and accumulation heterojunction at the interface between ZnO and rGO. Thus, the proposed ZnO/rGO bilayer thin film sensor might give a promise for high-performance NH3-sensing applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room Temperature

et al. 2016

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“…Li et al 41 developed hierarchical flower-like ZnO structures by one step hydrothermal synthesis. While both pure rGO and rGO/ZnO films show response to HCHO at room temperature, the response towards 2-10 ppm HCHO is enhanced in case of rGO/ZnO hybrid films in comparison with pure rGO.…”

Section: Reduced Graphene Oxide-zinc Oxide Gas Sensorsmentioning

confidence: 99%

Reduced graphene oxide-zinc oxide nano-composites for gas sensing applications

Gupta

2021

Advanced Materials Proceedings

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Nowadays, gas sensors are fast becoming an imperative part of modern life with extensive applications in domestic safety, environmental monitoring, industrial process control, public security, medical applications and chemical warfare assessment amongst many others. The detection of minor gas leaks has been a challenging area of research, particularly in view of the hazards to human health and safety posed by toxic gases like NO2, NO, CO, NH3 etc and combustible gases like methane, hydrogen gas and some volatile organic compounds. Thus it is imperative to evolve and employ simple yet reliable gas sensing mechanisms with optimum response and selectivity towards even low concentration of analyte gas at room temperature. Most of the conventional gas sensors are based on metal-oxide semiconductors which are low-cost, exhibit good sensitivity and fast response/recovery. Zinc oxide is one such n-type semiconducting oxide, which has been widely studied for gas sensing response due to its ease of fabrication, high sensitivity and environment-friendly nature. However, the operating temperature of such sensors is usually high (>200°C) owing to the wide band-gap (3.37 eV) and high electrical resistance (kΩ-MΩ), which limits their practical utilization. In order to be used in hazard monitoring and home/workplace safety, the gas sensors need to be sensitive to gas exposure in mild operating conditions. As an alternative, more recently, graphene and its derivatives like pristine graphene (PG), reduced graphene oxide (rGO) etc. have been studied for sensing applications owing to their exceptional electronic and physical properties such as high carrier mobility at room temperature, good thermal stability, high mechanical strength, ballistic conductivity and large specific surface area. These sensors show high sensitivity at low operating temperatures (down to room temperature) towards low concentrations of analyte gas. However most of these rGO based sensors exhibit relatively longer response/recovery times than metal-oxide based gas sensors. Hence, nanocomposites formed by hybridizing graphene or its derivatives with metal-oxide nanoparticles are being explored as gas sensing materials. Combining reduced graphene oxide with zinc oxide to form hybrid nanostructures is particularly interesting because not only do they display the individual properties of the metal oxide NPs (faster response/recovery times) and of graphene (high electronic conductivity leading to efficient room temperature gas response), but may also have synergistic effects leading to better sensitivity as a gas sensing material. Here we present a review of the recent progress in rGO-ZnO nanocomposites based gas sensors.

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“…3D architectured graphene/MOx nanocomposites have been widely used for the fabrication of gas sensors to detect various hazardous gases such as NO 2 , NH 3 , HCHO, H 2 S and so on [ 101 , 102 , 103 , 104 , 105 ]. However, many 3D graphene/MOx-based gas sensors require high operating temperatures (typically >100 °C) to achieve high sensitivity and fast response.…”

Section: Applications Of 3d Graphene/mox Hybrids For Room Temperatmentioning

confidence: 99%

“…3D graphene/MOx hybrids can be also used to detect other gases such as NH 3 , HCHO, H 2 and so on at room temperature [ 78 , 102 , 103 , 112 , 113 ]. For example, Feng et al reported 3D rGO encapsulated Co 3 O 4 nanocrystals fabricated by using the electro-spinning method for room temperature NH 3 sensing [ 102 ].…”

Section: Applications Of 3d Graphene/mox Hybrids For Room Temperatmentioning

confidence: 99%

3D Architectured Graphene/Metal Oxide Hybrids for Gas Sensors: A Review

Xia

Chen

et al. 2018

Sensors

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Graphene/metal oxide-based materials have been demonstrated as promising candidates for gas sensing applications due to the enhanced sensing performance and synergetic effects of the two components. Plenty of metal oxides such as SnO2, ZnO, WO3, etc. have been hybridized with graphene to improve the gas sensing properties. However, graphene/metal oxide nanohybrid- based gas sensors still have several limitations in practical application such as the insufficient sensitivity and response rate, and long recovery time in some cases. To achieve higher sensing performances of graphene/metal oxides nanocomposites, many recent efforts have been devoted to the controllable synthesis of 3D graphene/metal oxides architectures owing to their large surface area and well-organized structure for the enhanced gas adsorption/diffusion on sensing films. This review summarizes recent advances in the synthesis, assembly, and applications of 3D architectured graphene/metal oxide hybrids for gas sensing.

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Reduced graphene oxide/hierarchical flower-like zinc oxide hybrid films for room temperature formaldehyde detection

Cited by 70 publications

References 27 publications

ZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room Temperature

ZnO Nanoparticles/Reduced Graphene Oxide Bilayer Thin Films for Improved NH3-Sensing Performances at Room Temperature

Reduced graphene oxide-zinc oxide nano-composites for gas sensing applications

3D Architectured Graphene/Metal Oxide Hybrids for Gas Sensors: A Review

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