Morphological evolution, luminescence properties and a high-sensitivity ethanol gas sensor based on 3D flower-like MoS2–ZnO micro/nanosphere arrays

Song, Zhichao; Zhang, Jun; Jiang, Jialiang

doi:10.1016/j.ceramint.2019.11.151

Cited by 45 publications

(13 citation statements)

References 45 publications

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“…Three vibration modes of ZnO nanoflowers appeared, in which the peak centered at 436.4 cm −1 can be attributed to the characteristic vibration mode E high 2 of ZnO, which includes the movement of oxygen atoms, while the peaks located at 331.3 and 581.1 cm −1 can be assigned to the second-order vibration mode of E high 2 – E low 2 and the E 1 (LO) mode, respectively. 17 It can be seen that the characteristic peaks for all samples corresponded well with the vibration of hexagonal wurtzite structure ZnO, 14 which matched well with the XRD results. It is noteworthy that the peak positions of Au–ZnO are different from those of ZnO, which may be ascribed to the interaction between Au and ZnO.…”

Section: Resultssupporting

confidence: 81%

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Chen

Wang

et al. 2022

J. Mater. Chem. C

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Section: Resultssupporting

confidence: 81%

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Chen

Wang

et al. 2022

J. Mater. Chem. C

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“…Typically, TMDs do not require any surface functionalization unlike graphene, which is chemically inert in nature, and they have higher gas adsorption capacity. They have layer dependent band gaps and high specific surface area, which makes them suitable candidates for gas sensing applications. − However, the intrinsic shortcomings of pure TMDs nanomaterials like high response time/incomplete recovery and cross selectivity limit their practical application. − Alternative strategies to improve their performance by designing semiconductor heterostructure that are constructed by integrating TMDs with metal oxides have been proposed by many authors with properties which are difficult to achieve in a single system. − Previously, Lee et al presented a comprehensive review on TMDs and metal oxide hybrids for gas sensing applications and their collaborative benefit in terms of geometric, electronic, and chemical effects . Although recent achievements in TMDs have promoted increasing research interest in hybrid nanostructures for sensing applications, significant research effort is necessary to unfold many uncertainties for real life applications.…”

Section: D Materials Hybridized Mo Gas Sensorsmentioning

confidence: 99%

“…SEM images of 3D flowerlike (f) pure ZnO micro/nanospheres consisting of tightly packed tapering structures with a conic ZnO head and (g) MoS 2 –ZnO micro/nanosphere array at 1000× magnification. Reproduced with permission from ref . Copyright 2020 Elsevier.…”

Section: D Materials Hybridized Mo Gas Sensorsmentioning

confidence: 99%

Nanoscale Heterostructured Materials Based on Metal Oxides for a Chemiresistive Gas Sensor

Mondal

Gogoi

2022

ACS Appl. Electron. Mater.

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Nanomaterials with exceptional physical and chemical properties are the key to the success of the next generation of gas sensor technology, which is expected to have special features like being lightweight and flexible for wearability, mechanical robustness, reliable operation with wide environmental changes, and self-powered, in addition to the general sensor characteristics. The design of the chemiresistor with nanostructured hybrid material has indicated a great potential to meet these current demands, drawing significant attention to the technological developments in the past decades. The nanotechnology driven strategic design of the hybrid nanostructures is predicted to be pivotal for the development of nanomaterials bearing distinct physical and chemical properties and catalytic power, enabling them to produce overall improvements in sensor efficiency. In this review, a comprehensive review on the recent progress of hybrid gas sensors fabricated by coupling various metal oxides and 2D materials like transition metal dichalcogenides, graphene, and its derivatives are presented. The limitations of the current materials, key challenges, as well as the futuristic strategy for material design delivering fascinating properties and modern growth techniques are highlighted. A special emphasis has been given to hybrid sensors made with transition metal dichalcogenides, which are considered to be an emerging material and very few works have reported on its hybrid with metal oxides. The relevance of reliable detection of hydrogen is felt due to the dramatic rise in the use of hydrogen in industrial, commercial, and household purposes. As the whole world is moving toward a hydrogen economy, reliable, accurate, and robust hydrogen sensors will be a crucial component of the technological systems. In view of this, the current status and recent progress on hydrogen sensors based on heterostructured nanomaterials are also presented to the reader.

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“…ZnO is an n-type metal oxide semiconductor material of the Ⅱ-Ⅵ groups with high exciton binding energy (60 meV) and a wide direct band gap (3.4 eV), which has attracted a lot of attention in the field of gas sensors due to its rich morphology and excellent chemical and thermal stability [ 1 , 2 , 3 , 4 , 5 ]. However, there are still some disadvantages in the reported ZnO gas sensors, including poor linearity, slow response/recovery time, and low selectivity [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Study of Highly Sensitive Formaldehyde Sensors Based on ZnO/CuO Heterostructure via the Sol-Gel Method

Liu

Chen

Zhang

2021

Sensors

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Formaldehyde (HCHO) gas sensors with high performance based on the ZnO/CuO heterostructure (ZC) were designed, and the sensing mechanism was explored. FTIR results show that more OH− and N–H groups appeared on the surface of ZC with an increase in Cu content. XPS results show that ZC has more free oxygen radicals (O*) on its surface compared with ZnO, which will react with more absorbed HCHO molecules to form CO2, H2O and, electrons, accelerating the oxidation-reduction reaction to enhance the sensitivity of the ZC sensor. Furthermore, electrons move from ZnO to CuO in the ZC heterostructure due to the higher Fermi level of ZnO, and holes move from CuO to ZnO until the Fermi level reaches an equilibrium, which means the ZC heterostructure facilitates more free electrons existing on the surface of ZC. Sensing tests show that ZC has a low detection limit (0.079 ppm), a fast response/recovery time (1.78/2.90 s), and excellent selectivity and sensitivity for HCHO detection at room temperature. In addition, ambient humidity has little effect on the ZC gas sensor. All results indicate that the performance of the ZnO sensor for HCHO detection can be improved effectively by ZC heterojunction.

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Morphological evolution, luminescence properties and a high-sensitivity ethanol gas sensor based on 3D flower-like MoS2–ZnO micro/nanosphere arrays

Cited by 45 publications

References 45 publications

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Nanoscale Heterostructured Materials Based on Metal Oxides for a Chemiresistive Gas Sensor

Study of Highly Sensitive Formaldehyde Sensors Based on ZnO/CuO Heterostructure via the Sol-Gel Method

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