Room temperature flexible NH3 sensor based on polyaniline coated Rh-doped SnO2 hollow nanotubes

Liu, Ao; Lv, Siyuan; Zhao, Lianjing; Liu, Fangmeng; Wang, Jing; You, Rui; Yang, Zijie; He, Junming; Li, Jiang; Wang, Chenguang; Yan, Xu; Sun, Peng; Lu, Geyu

doi:10.1016/j.snb.2020.129313

Cited by 50 publications

(22 citation statements)

References 61 publications

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“…The electrons trapped by adsorbed species and band bending generate changes in conductivity when the material is heated. Due to high selectivity, fast response, low price, chemical stability, and large excitation binding energy, diverse SnO 2 nanostructures have been developed for gas sensing and health monitoring via hydrothermal, − inkjet printing, electrospinning, , pulsed laser deposition, electrodeposition, and hot press …”

Section: Mons As Sensing Materialsmentioning

confidence: 99%

“…SnO 2 NPs were usually used to fabricate n-type MON-based gas sensors to detect n -butanol ( n -BuOH) vapor, CO, NO 2 , ,, and NH 3 . Wang et al engineered 3D hierarchical SnO 2 -based gas sensors via a one-step and facile hydrothermal pathway .…”

Section: Mon-based Flexible/wearable Sensorsmentioning

confidence: 99%

“…Accordingly, the conducting channel of PANI becomes narrow and its resistance increases. Liu et al reported the hybridized heterostructure of PANI and Rh-SnO 2 hollow NTs (PRS) via electrospinning and in situ polymerization approaches, which exhibited a NH 3 sensor with a hollow tubular structure, as shown in Figure b . The hybridization structure demonstrated the greatest sensitivity value of 13.6 to 100 ppm of NH 3 with outstanding selectivity and good reliability.…”

Section: Strategies To Enhance Sensing Efficiencymentioning

confidence: 99%

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Metal-Oxide Nanomaterials Synthesis and Applications in Flexible and Wearable Sensors

et al. 2021

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Metal-oxide nanomaterials (MONs) have gained considerable interest in the construction of flexible/wearable sensors due to their tunable band gap, low cost, large specific area, and ease of manufacturing. Furthermore, MONs are in high demand for applications, such as gas leakage alarms, environmental protection, health tracking, and smart devices integrated with another system. In this Review, we introduce a comprehensive investigation of factors to boost the sensitivity of MON-based sensors in environmental indicators and health monitoring. Finally, the challenges and perspectives of MON-based flexible/wearable sensors are considered.

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Section: Mons As Sensing Materialsmentioning

confidence: 99%

Section: Mon-based Flexible/wearable Sensorsmentioning

confidence: 99%

Section: Strategies To Enhance Sensing Efficiencymentioning

confidence: 99%

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Metal-Oxide Nanomaterials Synthesis and Applications in Flexible and Wearable Sensors

et al. 2021

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“…Thus, the electron cloud area of BP/PANI for charge interaction between NH 3 molecules and p/π electrons is higher than that of PANI. Finally, the BP added to PANI may form a p-p hole accumulation/depletion isotype heterojunction at the PB/PANI interface, which can enhance the sensing response for NH 3 [42][43][44]. On the one hand, the Fermi level of BP and PANI are 3.9 eV [45] and 2.8-3.28 eV [42,43], respectively.…”

Section: Gas Response Of Sensorsmentioning

confidence: 99%

“…Finally, the BP added to PANI may form a p-p hole accumulation/depletion isotype heterojunction at the PB/PANI interface, which can enhance the sensing response for NH 3 [42][43][44]. On the one hand, the Fermi level of BP and PANI are 3.9 eV [45] and 2.8-3.28 eV [42,43], respectively. A new equilibrium of the Fermi level is achieved due to carriers transferring from each other when the PANI is coated onto BP.…”

Section: Gas Response Of Sensorsmentioning

confidence: 99%

High Sensitivity of Ammonia Sensor through 2D Black Phosphorus/Polyaniline Nanocomposite

Liu

Zhu

et al. 2021

Nanomaterials

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Recently, as a two-dimensional (2D) material, black phosphorous (BP) has attracted more and more attention. However, few efforts have been made to investigate the BP/polyaniline (PANI) nanocomposite for ammonia (NH3) gas sensors. In this work, the BP/PANI nanocomposite as a novel sensing material for NH3 detection, has been synthesized via in situ chemical oxidative polymerization, which is then fabricated onto the interdigitated transducer (IDTs). The electrical properties of the BP/PANI thin film are studied in a large detection range from 1 to 4000 ppm, such as conduction mechanism, response, reproducibility, and selectivity. The experimental result indicates that the BP/PANI sensor shows higher sensitivity and larger detection range than that of PANI. The BP added into PANI, that may enlarge the specific surface area, obtain the special trough structure for gas channels, and form the p–π conjugation system and p–p isotype heterojunctions, which are beneficial to increase the response of BP/PANI to NH3 sensing. Meanwhile, in order to support the discussion result, the structure and morphology of the BP/PANI are respectively measured by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV−vis), transmission electron microscopy (TEM), and field emissions scanning electron microscopy (SEM). Moreover, the sensor shows good reproducibility, and fast response and recovery behavior, on NH3 sensing. In addition, this route may offer the advantages of an NH3 sensor, which are of simple structure, low cost, easy to assemble, and operate at room temperature.

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1D Hybrid Tin Oxide Nanostructures: Synthesis and Applications

Suman

Jorgetto

Romeiro

et al. 2022

1D Semiconducting Hybrid Nanostructures

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Room temperature flexible NH3 sensor based on polyaniline coated Rh-doped SnO2 hollow nanotubes

Cited by 50 publications

References 61 publications

Metal-Oxide Nanomaterials Synthesis and Applications in Flexible and Wearable Sensors

Metal-Oxide Nanomaterials Synthesis and Applications in Flexible and Wearable Sensors

High Sensitivity of Ammonia Sensor through 2D Black Phosphorus/Polyaniline Nanocomposite

1D Hybrid Tin Oxide Nanostructures: Synthesis and Applications

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