Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

Li, Xiaoze; Wang, Yan; Tian, Wendi; Cao, Jianliang

doi:10.1021/acsomega.9b00905

Cited by 52 publications

(16 citation statements)

References 55 publications

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“…The In/Ni-MOF-derived In 2 O 3 -NiO-based sensors exhibit excellent stability after 26 days testing at 15 ± 5% RH. Table summarizes the comparison between this work and other TEA sensors. − By comparing with previous publications, it can be found that the In 2 O 3 -NiO-based sensor possesses lower operating temperature, higher sensitivity, and lower detection limit to TEA.…”

Section: Resultsmentioning

confidence: 85%

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing

et al. 2021

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It remains a challenge to design and fabricate highperformance gas sensors using metal−organic framework (MOF)derived metal oxide semiconductors (MOS) as sensing materials due to the structural damage during the annealing process. In this study, the mesoporous In 2 O 3 -NiO hollow spheres consisting of nanosheets were prepared via a solvothermal reaction and subsequent cation exchange. More importantly, the transformation of Ni-MOF into In/ Ni-MOF through exchanging the Ni 2+ ion with In 3+ ion can prevent the destruction of the porous reticular skeleton and hierarchical structure of Ni-MOF during calcination. Thus, the mesoporous In 2 O 3 -NiO hollow composites possess high porosity and large specific surface area (55.5 m 2 g −1 ), which can produce sufficient permeability pathways for volatile organic compound (VOCs) molecules, maximize the active sites, and enhance the capacity of VOC capture. The mesoporous In 2 O 3 -NiO-based sensors exhibit enhanced triethylamine (TEA) sensing performance (S = 33.9−100 ppm) with distinct selectivity, good long-term stability, and lower detection limit (500 ppb) at 200 °C. These results can be attributed to the mesoporous hollow hierarchical structure and p−n junction of In 2 O 3 -NiO. The preparation concept mentioned in this work may provide a versatile platform applicable to various mesoporous composite sensing material-based hollow structures.

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Section: Resultsmentioning

confidence: 85%

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing

et al. 2021

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“…As compared with the pure WO 3 sensor, whose peak response is 4.3 at 170 ℃, the sensor based on the 0.4-Bi 2 O 3 /WO 3 composite exhibits a much higher response (2.1-fold) to the TEA at a lower operating temperature (30 ℃-decrement), revealing the advantage of the Bi 2 O 3 /WO 3 composite in TEA detection. Herein, the performances of recent TEA sensors based on various metal oxides are compared [37][38][39][40][41][42][43][44][45][46], as summarized in Table 1. There is no doubt that the Bi 2 O 3 /WO 3 sensor possesses the ideal gas-sensing characteristics, including high response and low power consumption.…”

Section: Resultsmentioning

confidence: 99%

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Zhang

Li²,

Zhang³

et al. 2022

J Adv Ceram

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Traditional triethylamine (TEA) sensors suffer from the drawback of serious cross-sensitivity due to the low charge-transfer ability of gas-sensing materials. Herein, an advanced anti-interference TEA sensor is designed by utilizing interfacial energy barriers of hierarchical Bi2O3/WO3 composite. Benefiting from abundant slit-like pores, desirable defect features, and amplification effect of heterojunctions, the sensor based on Bi2O3/WO3 composite with 40% Bi2O3 (0.4-Bi2O3/WO3) demonstrates remarkable performance in terms of faster response/recovery time (1.7-fold/1.2-fold), higher response (2.1-fold), and lower power consumption (30 °C-decrement) as compared with the pristine WO3 sensor. Furthermore, the composite sensor exhibits long-term stability, reproducibility, and negligible response towards interfering molecules, indicating the promising potential of Bi2O3/WO3 heterojunctions in anti-interference detection of low-concentration TEA in real applications. This work not only offers a rational solution to design advanced gas sensors by tuning the interfacial energy barriers of heterojunctions, but also provides a fundamental understanding of hierarchical Bi2O3 structures in the gas-sensing field.

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“…It is generally believed that the sensing mechanism of MOF gas sensors is based on the influence of gas molecule adsorption/desorption on resistance changes [ 32 , 33 ]. Some researchers also believe that oxygen molecules (O 2 ) in the air form oxygen ions (O 2 − ) by absorbing electrons on the active site of MOFs at a specific temperature.…”

Section: Resultsmentioning

confidence: 99%

Metal-Organic Framework Assembled on Oriented Nanofiber Arrays for Field-Effect Transistor and Gas Sensor-Based Applications

Zhong

Dai

et al. 2022

Molecules

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Metal–organic framework (MOF) films are essential for numerous sensor and device applications. However, metal-organic framework materials have poor machinability due to their predominant powder-like nature, and their presence as the active layer in a device can seriously affect the performance and utility of the device. Herein, active layers of field-effect transistor (FETs) devices and chemiresistor gas sensors with high performance were constructed by loading Cu3(HITP)2 (HITP = 2,3,6,7,10,11-hexaiminotriphenylene) in situ-axial anchoring on oriented nanofiber arrays prepared via electrospinning. The strong interaction between polar groups on the polymer chains and metal ions promotes the nucleation of Cu3(HITP)2, steric hindrance makes particles of Cu3(HITP)2 with uniform size, morphology, and good crystallinity during nucleation by liquid phase epitaxial growth (LPE). Influences of differently-oriented Cu3(HITP)2 NFAs-based FETs on the electrical properties were studied, optimally oriented Cu3(HITP)2 NFAs-based FETs showed good mobility of 5.09 cm2/V·s and on/off ratio of 9.6 × 103. Moreover, excellent gas sensing response characteristics were exhibited in sensing volatile organic compounds (VOCs). Chemiresistor gas sensors with high response value, faster response and recovery are widely suited for VOCs. It brings new inspirations for the design and utilization of electrically conductive MOFs as an active layer for FETs and sensor units for chemiresistor gas sensors.

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Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

Cited by 52 publications

References 55 publications

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Metal-Organic Framework Assembled on Oriented Nanofiber Arrays for Field-Effect Transistor and Gas Sensor-Based Applications

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Graphitic Carbon Nitride Nanosheets Decorated Flower-like NiO Composites for High-Performance Triethylamine Detection

Cited by 52 publications

References 55 publications

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In2O3-NiO Composites for Enhanced Triethylamine Sensing

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In2O3-NiO Composites for Enhanced Triethylamine Sensing

Interfacial energy barrier tuning of hierarchical Bi2O3/WO3 heterojunctions for advanced triethylamine sensor

Metal-Organic Framework Assembled on Oriented Nanofiber Arrays for Field-Effect Transistor and Gas Sensor-Based Applications

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MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing

MOF-Derived Mesoporous and Hierarchical Hollow-Structured In₂O₃-NiO Composites for Enhanced Triethylamine Sensing