Metal-organic frameworks-derived zinc oxide nanopolyhedra/S, N: graphene quantum dots/polyaniline ternary nanohybrid for high-performance acetone sensing

Zhang, Dongzhi; Wu, Zhengfang; Zong, Xiaoqi

doi:10.1016/j.snb.2019.02.093

Cited by 119 publications

(64 citation statements)

References 60 publications

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“…The presence of PANI in the nanohybrid led to the formation of p-n heterojunctions and also caused to a redistribution of charge carriers at the interface of n-type ZnO and p-type PANI/S, N: GQDs, decreasing the activation energy needed for the adsorption of acetone gas molecules. The presence of S, N: GQDs in the nanohybrid created Schottky contacts, which further enhanced the sensor response through effective capture and migration of electrons [140].…”

Section: Composite Acetone Gas Sensorsmentioning

confidence: 99%

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Amiri

Roshan

Mirzaei

et al. 2020

Sensors

150

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Acetone is a well-known volatile organic compound that is widely used in different industrial and domestic areas. However, it can have dangerous effects on human life and health. Thus, the realization of sensitive and selective sensors for recognition of acetone is highly important. Among different gas sensors, resistive gas sensors based on nanostructured metal oxide with high surface area, have been widely reported for successful detection of acetone gas, owing to their high sensitivity, fast dynamics, high stability, and low price. Herein, we discuss different aspects of metal oxide-based acetone gas sensors in pristine, composite, doped, and noble metal functionalized forms. Gas sensing mechanisms are also discussed. This review is an informative document for those who are working in the field of gas sensors.

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Section: Composite Acetone Gas Sensorsmentioning

confidence: 99%

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Amiri

Roshan

Mirzaei

et al. 2020

Sensors

150

View full text Add to dashboard Cite

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“…In the case of composite, the sensing performances are also contributed by the oxygen adsorption on the interface between the two phases. In the ambient atmosphere, oxygen molecules are adsorbed on the MOX surface and interface of graphene/ZnO, capture electrons from the conduction band and then form an oxygen ion [64]. The formation of the oxygen ions will lower the electron concentration, leading to the formation of a depletion layer.…”

Section: Gas Sensing Mechanismmentioning

confidence: 99%

Wearable Carbon Monoxide Sensors Based on Hybrid Graphene/ZnO Nanocomposites

et al. 2020

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In this work, wearable resistive gas sensors based on hybrid graphene/zinc oxide (ZnO) nanocomposites were fabricated on a flexible cotton fabric and employed to monitor odorless and colorless carbon monoxide (CO). Dip-coating and chemical bath deposition (CBD) was used to deposit the graphene layer and grow the ZnO nanorods, respectively. The films were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-Ray diffraction (XRD) to investigate their morphological structures, elemental composition, and crystal phase, respectively. Those characterizations were also confirming the growth of ZnO nanorods on the already-deposited graphene layer on fabrics. From the gas sensor measurements at room temperature, it was revealed that these graphene/ZnO nanocomposites were highly sensitive and selective towards CO gas at low concentration down to 10 ppm. The shortest response and recovery times of the sensors were measured to be 280 s and 45 s, respectively. Moreover, in comparison to bare graphene sensors, the surface modification by ZnO nanorods could obviously enhance the sensing response by up to 40% (i.e., doubled sensitivity). These flexible hybrid sensors are therefore expected to be a promising alternative for the existing rigid CO sensors in the market by offering unique nanostructures, low-cost fabrication, high flexibility, and good sensing performances. INDEX TERMS Wearable gas sensor, carbon monoxide, graphene, zinc oxide, fabric-based sensor.

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“…In order to further enhance the sensing performance, the research of ternary hybrid system has attracted more and more attention in recent years. Various gas sensors based on ternary nanocomposite have been synthesized recently for gas sensing research, mainly include metal particles-metal oxideconducting polymers [107][108][109][110], metal particles-carbon nanotubes-conducting polymers [111], metal particlesgraphene-conducting polymers [112,113], metal oxidegraphene-conducting polymers [114][115][116][117][118], metal oxide-metal oxide-conducting polymers [119], metal oxide-metal oxidemetal oxide-conducting polymers [ 120].…”

Section: Polymer Based Ternary Nanocompositesmentioning

confidence: 99%

Conducting polymer-inorganic nanocomposite-based gas sensors: a review

Yan

Yang

et al. 2020

Science and Technology of Advanced Materials

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With the rapid development of conductive polymers, they have shown great potential in room-temperature chemical gas detection, as their electrical conductivity can be changed upon exposure to oxidative or reductive gas molecules at room temperature. However, due to their relatively low conductivity and high affinity toward volatile organic compounds and water molecules, they always exhibit low sensitivity, poor stability, and gas selectivity, which hinder their practical gas sensor applications. In addition, inorganic sensitive materials show totally different advantages in gas sensors, such as high sensitivity, fast response to low concentration analytes, high surface area, and versatile surface chemistry, which could complement the conducting polymers in terms of the sensing characteristics. It seems to be a win-win choice to combine inorganic sensitive materials with polymers for gas detection due to their synergistic effects, which has attracted extensive interests in gas-sensing applications. In this review, we summarize the recent development in polymer-inorganic nanocomposite based gas sensors. The roles of inorganic nanomaterials in improving the gas-sensing performances of conducting polymers are introduced and the progress of conducting polymer-inorganic nanocomposites including metal oxides, metal, carbon (carbon nanotube, graphene), and ternary composites are presented. Finally, a conclusion and a perspective in the field of gas sensors incorporating conducting polymer-inorganic nanocomposite are summarized.

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Metal-organic frameworks-derived zinc oxide nanopolyhedra/S, N: graphene quantum dots/polyaniline ternary nanohybrid for high-performance acetone sensing

Cited by 119 publications

References 60 publications

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Nanostructured Metal Oxide-Based Acetone Gas Sensors: A Review

Wearable Carbon Monoxide Sensors Based on Hybrid Graphene/ZnO Nanocomposites

Conducting polymer-inorganic nanocomposite-based gas sensors: a review

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