Ultra-high response acetone gas sensor based on ZnFe2O4 pleated hollow microspheres prepared by green NaCl template

Lv, Li; Cheng, Pengfei; Zhang, Yue; Zhang, Yaoqiong; Lei, Zhaohui; Wang, Yinglin; Xu, Luping; Weng, Zhi; Liu, Cong

doi:10.1016/j.snb.2022.131490

Cited by 32 publications

(16 citation statements)

References 63 publications

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“…(2) The sensitive property of the material is another important factor for the gas selectivity. It has been reported in several studies that ZnFe 2 O 4 sensors have good selectivity for acetone gas. , (3) The response of gas sensors to the target gas varies with the different operating temperatures. The change in selectivity with the operating temperature can be attributed to the value of the lowest unoccupied orbital energy of the gas molecule …”

Section: Resultsmentioning

confidence: 99%

“…It has been reported in several studies that ZnFe 2 O 4 sensors have good selectivity for acetone gas. 39,40 (3)…”

Section: Gas-sensing Propertiesmentioning

confidence: 99%

“…UV−vis spectra of ZnO and ZFO samples are displayed in Figure 10. 65 By the formula (αhv) 2 = A(hν -E g ), we can obtain the optical band gaps E g . The values of E g for ZnO, ZFO-1, ZFO-3, and ZFO-5 samples are determined to be 3.21, 3.17, 3.07, and 3.15 eV, respectively.…”

Section: Gas-sensing Mechanismmentioning

confidence: 99%

“…Acetone, one of the most toxic and irritating volatile organic gases, can cause coma and vomiting in the human body when it is inhaled at a level above 173 ppm. Moreover, long-term exposure to high-concentration acetone will lead to central nervous system anesthesia and liver damage. , Medical studies have shown that acetone can be a marker of the exhaled gas of diabetes since the concentration of exhaled acetone would be as high as 1.8 ppm for diabetic patients but is well around 300–900 ppb for healthy people. , The accurate detection of acetone concentration is one of the most important auxiliary methods for both medical diagnosis and air quality control. The conventional ways of detecting acetone gas, such as gas chromatography, Raman spectroscopy, and electrochemical methods, have the disadvantages of large instruments, high cost, and inconvenient operation. − Nevertheless, metal oxide semiconductor (MOS) sensors based on ZnO, SnO 2 , WO 3 , In 2 O 3 , etc., provide an effective platform with small size, high sensitivity, and easy operation for detecting acetone gas. − Hence, designing an acetone analyzer based on MOS nanomaterials with superior selective sensing performances typically at a low concentration under high relative humidity is significantly attractive in the field of sensors.…”

Section: Introductionmentioning

confidence: 99%

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ZnFe₂O₄ Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing

Song

Wang

et al. 2022

ACS Appl. Nano Mater.

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The development of uniform heterostructures for gas-sensing materials is promising to achieve both a fast response and recovery time at low gas levels and good selectivity at significantly high interference gas levels. Here we report the preparation of a ZIF-8-derived metal oxide semiconductor nanocomposite with a heterojunction structure and its application as acetone gas sensor. This heterojunction composite was fabricated through in situ growth of ZnFe2O 4 nanoparticles (10–20 nm) on the outer surface of rhombic dodecahedral-shaped ZnO. Through the derivative strategy, the ZnFe2O4/ZnO heterojunction sensor had a high response value of 225 ± 15 and a fast response time of 6 s to 100 ppm of acetone at the optimum working temperature of 260 °C. Furthermore, the response value reached 5.1 for only 1.8 ppm of acetone even under extremely high humidity (85%). To obtain a demonstration of the concept, an in-depth investigation of the sensing performances and the microstructure and surface state of ZnO and ZnFe2O4/ZnO heterojunction materials was carried out. We found that the excellent acetone sensitivity enhancement could largely be attributed to the ultrahigh number of free electrons and the abundant active sites generated by the tightly bound n–n heterojunction structure of ZnFe2O4/ZnO and the morphological characteristics. The large specific surface area of every sensing domain was the secondary factor in enhancing the gas-sensing properties. It suggests that this design for fabricating uniform and sensitive gas sensors may facilitate potential applications in detecting acetone gas.

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Section: Resultsmentioning

confidence: 99%

“…It has been reported in several studies that ZnFe 2 O 4 sensors have good selectivity for acetone gas. 39,40 (3)…”

Section: Gas-sensing Propertiesmentioning

confidence: 99%

Section: Gas-sensing Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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ZnFe₂O₄ Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing

Song

Wang

et al. 2022

ACS Appl. Nano Mater.

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“…In this process, the electron depletion layer becomes narrow and, thus, the resistance of the sensing materials decreases, ultimately generating a sensing signal. The related reactions are listed as follows [57]:…”

Section: Acetone-sensing Mechanismmentioning

confidence: 99%

One-Step Hydrothermal Synthesis of 3D Interconnected rGO/In2O3 Heterojunction Structures for Enhanced Acetone Detection

San

Zhang

et al. 2022

Chemosensors

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Acetone detection is of great significance for environmental monitoring or diagnosis of diabetes. Nevertheless, fast and sensitive detection of acetone at low temperatures remains challenging. Herein, a series of rGO-functionalized three-dimensional (3D) In2O3 flower-like structures were designed and synthesized via a facile hydrothermal method, and their acetone-sensing properties were systematically investigated. Compared to the pure 3D In2O3 flower-like structures, the rGO-functionalized 3D In2O3 flower-like structures demonstrated greatly improved acetone-sensing performance at relatively low temperatures. In particular, the 5-rGO/In2O3 sensor with an optimized decoration exhibited the highest response value (5.6) to 10 ppm acetone at 150 °C, which was about 2.3 times higher than that of the In2O3 sensor (2.4 at 200 °C). Furthermore, the 5-rGO/In2O3 sensor also showed good reproducibility, a sub-ppm-level detection limit (1.3 to 0.5 ppm), fast response and recovery rates (3 s and 18 s, respectively), and good long-term stability. The extraordinary acetone-sensing performance of rGO/In2O3 composites can be attributed to the synergistic effect of the formation of p-n heterojunctions between rGO and In2O3, the large specific surface area, the unique flower-like structures, and the high conductivity of rGO. This work provides a novel sensing material design strategy for effective detection of acetone.

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Recent advances in ZnO nanostructure as a gas‐sensing element for an acetone sensor: a short review

et al. 2022

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Air pollution is a severe concern globally as it disturbs the health conditions of living beings and the environment because of the discharge of acetone molecules. Metal oxide semiconductor (MOS) nanomaterials are crucial for developing efficient sensors because of their outstanding chemical and physical properties, empowering the inclusive developments in gas sensor productivity. This review presents the ZnO nanostructure state of the art and notable growth, and their structural, morphological, electronic, optical, and acetone-sensing properties. The key parameters, such as response, gas detection limit, sensitivity, reproducibility, response and recovery time, selectivity, and stability of the acetone sensor, have been discussed. Furthermore, gas-sensing mechanism models based on MOS for acetone sensing are reported and discussed. Finally, future possibilities and challenges for MOS (ZnO)-based gas sensors for acetone detection have also been explored.

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Ultra-high response acetone gas sensor based on ZnFe2O4 pleated hollow microspheres prepared by green NaCl template

Cited by 32 publications

References 63 publications

ZnFe₂O₄ Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing

ZnFe₂O₄ Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing

One-Step Hydrothermal Synthesis of 3D Interconnected rGO/In2O3 Heterojunction Structures for Enhanced Acetone Detection

Recent advances in ZnO nanostructure as a gas‐sensing element for an acetone sensor: a short review

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Ultra-high response acetone gas sensor based on ZnFe2O4 pleated hollow microspheres prepared by green NaCl template

Cited by 32 publications

References 63 publications

ZnFe2O4 Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing

ZnFe2O4 Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing

One-Step Hydrothermal Synthesis of 3D Interconnected rGO/In2O3 Heterojunction Structures for Enhanced Acetone Detection

Recent advances in ZnO nanostructure as a gas‐sensing element for an acetone sensor: a short review

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ZnFe₂O₄ Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing

ZnFe₂O₄ Nanoparticles on ZIF-8-Derived ZnO for Enhanced Acetone Sensing