Preparation and gas sensing properties of ZnO/MXene composite nanomaterials

Zhu, Yong; Ma, Yunlei; Wen, Ming; Jiang, Guojian

doi:10.1016/j.sna.2022.113740

Cited by 23 publications

(8 citation statements)

References 43 publications

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“…When the ZnO/Ti 3 C 2 T x MXene nanocomposite sensor was exposed to the air, oxygen molecules were covered and captured by the electrons on the material layers, as shown in Figure 7 . At room temperature, most adsorbed oxygen molecules tend to create negative oxygen species (O 2 − , O 2− , and O − ) at defects and active sites of the sensor layers, which play a predominant part in improved gas sensing [ 33 , 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Enhanced Gas Sensing Performance of ZnO/Ti3C2Tx MXene Nanocomposite

Thakur

Noh

2022

Micromachines

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A representative of titanium carbide MXene, Ti3C2Tx is a promising candidate for high performance gas sensing and has attracted significant attention. However, MXene naturally has a multilayer structure with low porosity, which prevents its gas-sensing activity. Zinc oxide (ZnO) has long been utilized as a gas detector. Despite its good response to multiple gases, high operation temperature has limited its widespread use as a gas-sensing material. In this study, a room-temperature toxic gas sensor was prepared from ZnO/Ti3C2Tx MXene nanocomposite consisting of 2D few-layered MXene and 1D ZnO nanoparticles. A simple technique for synthesizing the nanocomposite was established. The physicochemical properties of the nanocomposite were fine-controlled with more active sites and higher porosity. The sensitivity and gas-selectivity of the sensing material were closely examined. The nanocomposite showed enhanced response and recovery behaviors to toxic gases, which outperformed pure Ti3C2Tx MXene and pure ZnO. This study offers a practical strategy by which to increase the gas-sensing performance of Ti3C2Tx MXene, and expands comprehensive understanding of the gas-sensing process of ZnO/Ti3C2Tx p-n heterostructure.

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Section: Resultsmentioning

confidence: 99%

Enhanced Gas Sensing Performance of ZnO/Ti3C2Tx MXene Nanocomposite

Thakur

Noh

2022

Micromachines

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“…In addition, from the diffraction plane of (101) and (202) in LaFeO 3 , the intensities of the diffraction peaks of LaFeO 3 increase with its increasing mass fraction, which indicate that the successful synthesis of LaFeO 3 onto ZnO [34].…”

Section: Materials Characterizationmentioning

confidence: 96%

Enhanced acetone gas sensing performance of ZnO polyhedrons decorated with LaFeO₃ nanoparticles

Zhang,

Liu,

Huang

et al. 2023

Mater. Res. Express

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Since acetone is potentially harmful to humans, it is necessary to develop a high-performance acetone gas sensor. In this study, ZnO polyhedrons decorated with LaFeO3(LFO) nanoparticles with high acetone-sensing performances were prepared by a facile microwaveassisted hydrolytic reaction method, and the p-n heterojunction was successfully constructed.The crystal structure, surface morphology, and internal composition of the LaFeO3/ZnO composites were analyzed by various characterization methods. The results showed thatLaFeO3 nanoparticles were attached to the surface of ZnO polyhedrons. Compared with the pure ZnO sensor, the LaFeO3/ZnO sensor showed a significant improvement in sensitivity, recovery time, and selectivity. For example, at the optimal operating temperature of 340℃, the response of the LaFeO3/ZnO sensor to 100 ppm acetone could reach ~208.7, which was39 times higher than that of the pure ZnO sensor. And the recovery time of the LaFeO3/ZnO sensor was reduced to 16 s. Meanwhile, the LaFeO3/ZnO sensor had the highest selectivity for acetone. The significant improvement of the sensing performance of the LaFeO3/ZnO sensor might be attributed to the formation of p-n heterojunctions and the good catalytic effect of LaFeO3.

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“…Ranjbar et al studied the sensing performance of the novel wearable conductive polymer/MXene-based pressure sensor for the human detection and information transmission using cotton fabric [65]. In another study, Zhu et al developed a novel acetone sensor using ZnO/Ti 3 C 2 T x -MXene composite nanomaterials [66]. The few-layered ZnO/Ti3C2Tx-MXene composite nanomaterial was prepared by a hydrothermal method Furthermore, the proposed nanosensor exhibited a high-sensing response nearly six times higher than that of the ZnO in a concentration range of 14.4-100 ppm of acetone at 320°C due to the large specific surface area and layered structure.…”

Section: Mxene Nanobiosensorsmentioning

confidence: 99%

Nanostructures in Biosensors: Development and Applications

Karabulut¹,

Üllen²,

Karakuş³

2022

Biomedical Engineering

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In recent years, there has been significant interest in advanced nanobiosensor technologies with their exceptional properties for real-time monitoring, ultra-sensing, and rapid detection. With relevant experimental data, highly selective and hypersensitive detection of various analytes is possible using biosensors based on nanostructures. In particular, biosensors focus on vital issues such as disease early diagnosis and treatment, risk assessment of quality biomarkers, food-water quality control, and food safety. In the literature, there has been great attention to the preparation and sensing behavior of several nanomaterials-based sensors, such as polymer frameworks, metal-organic frameworks, one-dimensional (1D) nanomaterials, two-dimensional (2D) nanomaterials, and MXenes-based sensors. This chapter gives points to all aspects of fabrication, characterization, mechanisms, and applications of nanostructures-based biosensors. Finally, some smart advanced sensing systems for ultra-sensing nanoplatforms, as well as a comprehensive understanding of the sensor performances, current limitations, and future outlook of next-generation sensing materials, are highlighted.

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Preparation and gas sensing properties of ZnO/MXene composite nanomaterials

Cited by 23 publications

References 43 publications

Enhanced Gas Sensing Performance of ZnO/Ti3C2Tx MXene Nanocomposite

Enhanced Gas Sensing Performance of ZnO/Ti3C2Tx MXene Nanocomposite

Enhanced acetone gas sensing performance of ZnO polyhedrons decorated with LaFeO₃ nanoparticles

Nanostructures in Biosensors: Development and Applications

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Preparation and gas sensing properties of ZnO/MXene composite nanomaterials

Cited by 23 publications

References 43 publications

Enhanced Gas Sensing Performance of ZnO/Ti3C2Tx MXene Nanocomposite

Enhanced Gas Sensing Performance of ZnO/Ti3C2Tx MXene Nanocomposite

Enhanced acetone gas sensing performance of ZnO polyhedrons decorated with LaFeO3 nanoparticles

Nanostructures in Biosensors: Development and Applications

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Enhanced acetone gas sensing performance of ZnO polyhedrons decorated with LaFeO₃ nanoparticles