Hydrangea-type bismuth molybdate as a room-temperature smoke and humidity sensor

Narwade, Sandesh H.; Shinde, Pritamkumar V.; Shinde, Nanasaheb M.; Jadhav, Vijaykumar V.; Shaikh, Shoyebmohamad F.; Mane, Rajaram S.; Bhosle, Udhav V.

doi:10.1016/j.snb.2021.130643

Cited by 13 publications

(3 citation statements)

References 73 publications

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“…High-resolution O 1s spectra display peaks between 531.5 and 529.7 eV, corresponding to either lattice oxygen (O latt ) or surfaceabsorbed free oxygen radicals (O ads ) (Figure 1d). 49,50 The O ads component was 22 , respectively. In gas sensors, adsorbed free oxygen radicals react with the analyte, which generates a quantifiable electronic signal.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Bismuth molybdate (BMO) is a low-cost and low-toxicity bimetallic oxide with an adjustable morphology and good catalytic properties. Because of these characteristics, it has been studied for a wide range of applications including as an acousto-optic nanomaterial, gas sensor, photoconductor, photocatalyst, adsorbent, ionic conductor, metabolite, and humidity sensor. − As a gas sensor, the α and γ phases of BMO have been developed to detect different VOC, but never specifically for TEA quantification. , This Aurivillius oxide is commonly synthesized by combining bismuth(III) nitrate (BNO) with either ammonium heptamolybdate or sodium molybdate. , More recently, BMO has been derived from Bi-MOF instead of uncoordinated BNO . This synthesis method was shown to improve the performance of BMO nanoparticles for photocatalysis due to better charge separation mainly caused by the presence of intrinsic surface defects generated by the collapse of the MOF structure .…”

Section: Introductionmentioning

confidence: 99%

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Bismuth Molybdate Nanorods Derived from a Metal–Organic Framework for Triethylamine Gas Sensors

Tremblay

Zhang

2023

ACS Appl. Nano Mater.

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A heterojunction metal oxide semiconductor made of three phases of bismuth molybdate (BMO) (α, β, γ) was synthesized by a one-pot process from a metal–organic framework (MOF) and evaluated in a side-heated sensor for the detection of the toxic gas triethylamine (TEA). An X-ray diffraction analysis indicated that the heterostructure comprises 24.1% α-Bi2Mo3O12, 59.1% β-Bi2Mo2O9, and 16.8% γ-Bi2MoO6. Because of the collapse of the MOF structure during the synthesis process, BMO nanorods exhibited surface defects beneficial for gas sensing. Consequently, the TEA sensing performance of αβγ-BMOMOF was significantly superior to αβγ-BMO prepared instead with uncoordinated bismuth nitrate. When compared to single-phase α-Bi2Mo3O12 MOF and γ-Bi2MoO6 MOF sensors, the αβγ-BMOMOF heterojunction sensor exhibited high performance with a limit of detection of 0.5 ppm and a response value of 58.5 to 100 ppm TEA at an optimal temperature of 340 °C. In addition, αβγ-BMOMOF nanorods exhibited excellent selectivity, long-term stability, and short response and recovery times of 2 and 5 s, respectively. Because of heterojunctions between the different phases, the αβγ-BMOMOF sensor had a higher electrical resistance in air and adsorbed a larger quantity of oxygen anions capable of reacting with TEA. These features of the heterostructure material explain its superior TEA sensing performance. The low-cost and low-toxicity αβγ-BMOMOF sensor described here is a promising alternative for the detection of volatile organic molecules.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bismuth Molybdate Nanorods Derived from a Metal–Organic Framework for Triethylamine Gas Sensors

Tremblay

Zhang

2023

ACS Appl. Nano Mater.

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“…With the wide application of big data analysis and Internet of Things (IoT), the smart home system has been developed rapidly and the internet of everything and intelligent adjustment can be realized [1] . The system can be personalized according to the needs of different users to provide the better service and experience, and then the quality and comfort of home life is improved greatly, which has the advantages of energy saving, environmental protection and safety [2][3][4] . In addition, it can also realize the connection between home intelligence and city intelligence, furthermore, an important support for the development of smart cities can be provided [5][6][7] .…”

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confidence: 99%

Study of intelligent home environment system based on big data and improved k-means algorithm

Yu,

Liu,

2024

Preprint

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The Embedded operating system based on STC12C5A MCU is designed to facilitate real-time monitoring and control of the home environment, in order to solve some problems such as low acquisition frequency, poor real-time performance, lack of feedback and adaptation. The Kalman filter and improved k-means algorithm are used to analyze the big data which is processed by BP neural network, and then the most comfortable living environment parameters can be obtained. The independent monitoring mechanism and feedback adjustment are designed to achieve efficient collaboration and stable operation of system hardware and software. The test results show that the system has high acquisition accuracy, fast response speed, good reliability performance, as well as good real-time and adaptive capabilities.

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Manual shaking exfoliation of large‐size two‐dimensional LiInP₂S₆ nanosheets with exponential change in ionic conductivity for water detection

Liang,

Sun,

Zhu

et al. 2024

SmartMat

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Large‐sized and atomically thin two‐dimensional metal thiophosphate materials have been widely exploited in detectors due to their rich physical/chemical properties of high surface area and massive adjustable sites. However, existing production methods are limited in terms of meeting the demanding challenges in achieving the scalable fabrication of high‐quality nanomaterials under mild conditions. Here, we develop a facile intercalation–exfoliation method that can fabricate large lateral size (>23 μm) and few‐layer LiInP2S6 nanosheets with high crystalline quality fast. Due to the advantage of hydrophilicity of lithium, swelled interlayer spacing can be obtained, which enables the rapid exfoliation by only slight manual shaking within tens of seconds. Concomitantly, the inorganic LiInP2S6 film manufactured by nanosheets has inter‐connected ionic channels, which can be adjusted on the basis of the water content, enabling tunable ionic conductivity. As a result, ionic conductor films using ions as charge carriers can achieve high water response with good repeatability and excellent long‐term stability in a wide moisture range. Moreover, the as‐prepared detector has excellent capability in real‐time noncontact human–machine interfacing. This study, not only is a powerful strategy for the fabrication of large‐sized and high‐quality nanosheets presented but also proof for the promising development of iontronic devices in new applications.

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Hydrangea-type bismuth molybdate as a room-temperature smoke and humidity sensor

Cited by 13 publications

References 73 publications

Bismuth Molybdate Nanorods Derived from a Metal–Organic Framework for Triethylamine Gas Sensors

Bismuth Molybdate Nanorods Derived from a Metal–Organic Framework for Triethylamine Gas Sensors

Study of intelligent home environment system based on big data and improved k-means algorithm

Manual shaking exfoliation of large‐size two‐dimensional LiInP₂S₆ nanosheets with exponential change in ionic conductivity for water detection

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Hydrangea-type bismuth molybdate as a room-temperature smoke and humidity sensor

Cited by 13 publications

References 73 publications

Bismuth Molybdate Nanorods Derived from a Metal–Organic Framework for Triethylamine Gas Sensors

Bismuth Molybdate Nanorods Derived from a Metal–Organic Framework for Triethylamine Gas Sensors

Study of intelligent home environment system based on big data and improved k-means algorithm

Manual shaking exfoliation of large‐size two‐dimensional LiInP2S6 nanosheets with exponential change in ionic conductivity for water detection

Contact Info

Product

Resources

About

Manual shaking exfoliation of large‐size two‐dimensional LiInP₂S₆ nanosheets with exponential change in ionic conductivity for water detection