Alcohol sensing performance of ZnO hexagonal nanotubes at low temperatures: A qualitative understanding

Acharyya, Debanjan; Bhattacharyya, P.

doi:10.1016/j.snb.2016.01.035

Cited by 72 publications

(26 citation statements)

References 37 publications

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“…In addition, this synthetic strategy also does not require any certain template, surfactant membrane or epitaxial substrate to control their orientation [75,76]. Recently, various nanostructures are synthesized successfully on the basis of aqueous chemical growth method, such as nanorods [77,78], nanowires [79,80], nanoflowers [81,82], nanoneedles [83], nanoplates [84], nanosheets [85], nanotowers [24] and nanotubes [86]. The synthesis involves the hydrolysis-condensation of hydrated metal ions and complexes (inorganic polymerization) and their hetero nucleation onto substrates.…”

Section: Aqueous Chemical Growth Mechanismmentioning

confidence: 99%

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

Guo

2017

JABB

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Zinc Oxide (ZnO) nanomaterials have received broad attention thanks to their distinguished performance in electronics, optics and photonics. Due to the novel applications in optoelectronics, sensors, transducers and biomedical sciences, ZnO materials have become a leading edge in nanotechnology. Therefore, the properties of ZnO nanostructures potential for applying in biotechnology are marked along with the relevant common growth mechanism aim to provide the vital information about the growing field related to nano-ZnO in the biomedical system with environmental friendly nature and biocompatibility.

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Section: Aqueous Chemical Growth Mechanismmentioning

confidence: 99%

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

Guo

2017

JABB

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“…The hybrid system assures efficient electronic transfer for sensing reactions, and the abundant functional groups in Ti 3 C 2 T x MXene create abundant active sites for the absorption with ethanol gas molecules, leading to a high sensitivity over approximately 2.3 times higher than that of pristine Ti 3 C 2 T x MXenes at RT. Meanwhile, an ultrafast response rate (0.4 second, 150 ppm) is achieved by PANI/Ti 3 C 2 T x ‐based flexible sensors, which is among the fastest response time for all types of RT gas sensors . Furthermore, PANI/Ti 3 C 2 T x ‐based flexible sensors show a good mechanical stability, flexibility, and stable sensitivity of up to 27.4% (150 ppm of ethanol gas molecules) after continuous bending state (0‐120°) at RT.…”

Section: Introductionmentioning

confidence: 96%

“…Meanwhile, an ultrafast response rate (0.4 second, 150 ppm) is achieved by PANI/Ti 3 C 2 T x -based flexible sensors, which is among the fastest response time for all types of RT gas sensors. [27][28][29][30] Furthermore, PAN-I/Ti 3 C 2 T x -based flexible sensors show a good mechanical stability, flexibility, and stable sensitivity of up to 27.4% (150 ppm of ethanol gas molecules) after continuous bending state (0-120 ) at RT. The excellent absorption capacity and high catalytic activity achieved by introducing MXenes materials were proved by using density functional theory (DFT) simulations.…”

Section: Introductionmentioning

confidence: 99%

High‐performance flexible sensing devices based on polyaniline/MXene nanocomposites

Zhao

Wang

Wei

et al. 2019

InfoMat

343

180

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Highly active two‐dimensional (2D) nanocomposites, integrating the unique merits of individual components and synergistic effects of composites, are greatly desired for flexible sensing device applications. Although 2D transition metal carbides and nitrides (MXenes) combined with their high metallic conductivity and versatile surface chemistry have shown its huge potential for sensing reactions, it still remains a major challenge to construct functional materials with intriguing sensing performance at room temperature (RT). Herein, we used an integration of density functional theory (DFT) simulations and bulk electrosensitive measurements to show high electrocatalytic sensitivity of polyaniline/MXene (PANI/Ti3C2T x) nanocomposites. Thanks to the synergistic properties of nanocomposites and high catalytic/absorption capacity of Ti3C2T x MXene, PANI nanoparticles are rationally decorated on Ti3C2T x nanosheet surface via in situ polymerization by low temperature approach to induce remarkable detection sensitivity, rapid response/recovery rate, and mechanical stability at RT. This study offers a versatile platform to use MXenes to fabricate 2D nanocomposites materials for high‐performance flexible gas sensors.

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“…The adsorbed oxygen is mainly in the form of

{normalO}_{2}^{-}

below the temperatures of 100 °C. Therefore, when exposed to ethanol, C 2 H 5 OH molecules subsequently dissociate into CH 3 CHO and interact with the adsorbed oxygen to form CO 2 and H 2 O as depicted in Equation and Figure a . The trapped electrons are released back to the conduction band and recombine with the holes in the surface region, leading to the hole accumulation layer becoming thinner.…”

Section: Resultsmentioning

confidence: 99%

Near‐Room‐Temperature Ethanol Gas Sensor Based on Mesoporous Ag/Zn–LaFeO₃ Nanocomposite

Chen

Wang

et al. 2018

Adv Materials Inter

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detecting ethanol along with response of 53 (50 ppm) at 275 °C. [6] Mesoscale porosity makes a significant contribution to obtaining high response in MOS because of the facile penetration of gas molecules. [7] A number of efforts have been made to synthesize mesoporous materials, [8][9][10][11] one of which involved the nanocast mesostructured metal oxides synthesized by hard template. Compared to soft template and sacrificial colloidal template methods, the hard template can provide a relatively stable matrix during heat treatment over a larger temperature range, as a result, it helps MOS show higher crystallinity. [12] Recently, it has been reported that hetero nanostructures consisting of two or more components with noble metals decorated can improve the sensing performance. [13,14] To improve the gas sensing performance of metal oxides, noble metals, such as Ag, Pd, Pt, and Au are commonly regarded as catalyst, especially, Ag is able to weaken the adsorption and the desorption energy of ethanol molecules on the surface by promoting the electron conduction properties, [15] thus it enables the analyte to access the activated surface. Perovskite type (ABO 3 , where A is rare earth and B is transition metal) MOS have attracted considerable attentions in applications of catalysis, [16] renewable energy storage, [17] and gas sensors [18] due to their numerous favorable physical/chemical properties. Among various perovskite type materials, LaFeO 3 shows considerably sensitive to reducing gases such as ethanol, [19] acetone, [20] and formaldehyde. [21] However, pure LaFeO 3 have some deficiencies such as high resistance, high working temperature, and poor selectivity. Ag/LaFeO 3 has been investigated to detect VOCs at low temperature (<200 °C) according to our previous work. Zhang et al. reported Ag/LaFeO 3 showed excellent gassensing properties to formaldehyde gas. At the optimal working temperature of 90 °C, the response of the sensor to 1 ppm formaldehyde is 25. [22] In addition, it was reported that the substitution of La 3+ in the LaFeO 3 compound by the lower-valent cations, such as Mg 2+ , [23] Ba 2+ , [24] Ca 2+ , [25] Sr 2+ , [26] and Pb 2+ , [27] could significantly improve gas sensing properties of materials, especially gas response and selectivity.In this study, mesoporous Ag/Zn-LaFeO 3 nanocomposites have been synthesized via a simple nanocasting technique shown in Figure 1. This kind of composite not only possesses a highly active and large surface area for ethanol recognition,The rational design of heterojunction between different metal oxides with mesoporous structures has attracted tremendous attention due to their special physicochemical properties and vital importance for practical applications. In this paper, mesoporous Ag/Zn-LaFeO 3 nanocomposite is successfully synthesized through a facile nanocasting technique using KIT-6 as a hard template in sol-gel route and used as sensing materials to achieve an exceptionally sensitive and selective detection of trace ppm-level ethanol. The obtained compos...

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Alcohol sensing performance of ZnO hexagonal nanotubes at low temperatures: A qualitative understanding

Cited by 72 publications

References 37 publications

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

High‐performance flexible sensing devices based on polyaniline/MXene nanocomposites

Near‐Room‐Temperature Ethanol Gas Sensor Based on Mesoporous Ag/Zn–LaFeO₃ Nanocomposite

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Alcohol sensing performance of ZnO hexagonal nanotubes at low temperatures: A qualitative understanding

Cited by 72 publications

References 37 publications

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

Property of Zinc Oxide (Zno) Nanostructures Potential for Biomedical System and Its Common Growth Mechanism

High‐performance flexible sensing devices based on polyaniline/MXene nanocomposites

Near‐Room‐Temperature Ethanol Gas Sensor Based on Mesoporous Ag/Zn–LaFeO3 Nanocomposite

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Near‐Room‐Temperature Ethanol Gas Sensor Based on Mesoporous Ag/Zn–LaFeO₃ Nanocomposite