Highly sensitive hybrid nanofiber-based room-temperature CO sensors: Experiments and density functional theory simulations

Wang, Lili; Chai, Ruiqing; Lou, Zheng; Shen, Guozhen

doi:10.1007/s12274-017-1718-9

Cited by 45 publications

(24 citation statements)

References 39 publications

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“…The bond lengths between the ethanol, methanol, ammonia, and acetone and the OH‐terminated Ti 3 C 2 MXene were 1.13, 2.12, 1.89, and 1.34 å, respectively (Figure S11), and the adsorption energy (DFT calculated) was up to −0.985, −0.354, −0.515, and − 0.609 eV (Figure E), respectively. Obviously, the bond length for the adsorption of ethanol is smaller than other gas molecules, indicating the much stronger interface interaction in ethanol sensing layer …”

Section: Resultsmentioning

confidence: 99%

“…Obviously, the bond length for the adsorption of ethanol is smaller than other gas molecules, indicating the much stronger interface interaction in ethanol sensing layer. 44,45 In addition to the basic tests above, we also studied the flexibility of PANI/Ti 3 C 2 T x -based flexible sensors. Figure 5A shows an optical image of the as-prepared gas sensor with good mechanical flexibility.…”

Section: Resultsmentioning

confidence: 99%

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

Zhao

Wang

Wei

et al. 2019

InfoMat

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332

178

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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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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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

Zhao

Wang

Wei

et al. 2019

InfoMat

Self Cite

332

178

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“…Exactly, the latter one is more trustable and solid results to support the mechanism study, e.g., in situ FTIR [183,184], in situ Kelvin probe [185], in situ STM [186,187], in situ TEM [188,189]). In addition, Theoretically studies (such as DFT simulation) [190], are also helpful for researchers to understand the interaction between the gas analyte and sensitive materials, the succedent electronic structure changes, or band gap regulation in heterojunction, or charge transfer, etc., which can guide the orientation of materials design [70,[190][191][192][193][194][195]. Otherwise, learning theoretical studies toward hybrid catalyst designs can inspire the further researches on hybrid gas sensing due to the similar surface physical/chemical science, band gap theories, and charge transfer process [196][197][198][199][200][201].…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

et al. 2020

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HIGHLIGHTS• This review gives a thinking based on the generic mechanisms rather than simply dividing them as different types of combination of materials, which is unique and valuable for understanding and developing the novel hybrid materials in the future.• The hybrid materials, their sensing mechanism, and their applications are systematically reviewed. Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are also discussed.ABSTRACT Chemi-resistive sensors based on hybrid functional materials are promising candidates for gas sensing with high responsivity, good selectivity, fast response/recovery, great stability/repeatability, room-working temperature, low cost, and easy-to-fabricate, for versatile applications. This progress report reviews the advantages and advances of these sensing structures compared with the single constituent, according to five main sensing forms: manipulating/constructing heterojunctions, catalytic reaction, charge transfer, charge carrier transport, molecular binding/sieving, and their combinations. Promises and challenges of the advances of each form are presented and discussed.Critical thinking and ideas regarding the orientation of the development of hybrid material-based gas sensor in the future are discussed.

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“…1D nanomaterials with attractive features, serving as an outstanding sensing layer, have shown more possibilities in chemical sensor . However, the nanostructures with individual components always impede their improvement of gas sensing performances.…”

Section: Introductionmentioning

confidence: 99%

“…However, the nanostructures with individual components always impede their improvement of gas sensing performances. Construction of multidimensional nanostructure with hybrid compositions (such as 0D–1D and 1D–1D composites) offers an intelligent way to optimize the sensing ability . The appealing advantage of using 1D nanostructure as backbone can achieve a uniform distribution of secondary nanomaterials, leading to large surface areas and synergistic effect in heterojunctions.…”

Section: Introductionmentioning

confidence: 99%

Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

Zhou

Liu

Zhang

et al. 2018

Adv Materials Inter

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hybrid compositions (such as 0D-1D and 1D-1D composites) offers an intelligent way to optimize the sensing ability. [12] The appealing advantage of using 1D nanostructure as backbone can achieve a uniform distribution of secondary nanomaterials, leading to large surface areas and synergistic effect in heterojunctions. Particularly, p-type Mn 3 O 4 has attracted much attention and been considered as an excellent candidate for some effective redox reactions because of its polymorphism and coexistence of mix valence. [13] In addition, the nonprecious transition metal oxide is also environmental friendly, low cost, and abundant. [14][15][16][17] For gas sensors, using pure Mn 3 O 4 as sensing materials cannot always meet the growing demands of high sensitivity, good selectivity, and excellent stability. To improve the sensing performance, many efforts, including fabricating pores and hierarchical structure, coating with conductive materials and doping noble metal, have been reported. [18][19][20][21] In addition, constructing p-n heterostructure is also a promising approach based on the sensing mechanism of charge carrier separation and formation of charge depletion layer. The multivalence properties and synergistic catalytic effects between Mn 3 O 4 and additive n-type materials could provide a highway for electron transfer, which encourages us to prepare Mn 3 O 4 with novel structure or morphology combined with the outstanding multifunctional material to improve their electrosensing properties.Herein, a 1D-1D branched heterostructure based on the combination of Mn 3 O 4 nanowires with Zn 2 SnO 4 nanorods by using a two-step hydrothermal route was designed. The modified structures with different composition ratios were also investigated. Results showed the branch-like Mn 3 O 4 /Zn 2 SnO 4 -based gas sensor displayed remarkable acetone selectivity behaviors. Notably, compared with pure p-type Mn 3 O 4 nanowires, the Mn 3 O 4 /Zn 2 SnO 4 heterojunction with dense branch structure exhibited higher response at 240 °C. Such a unique hybrid material could retain its pristine nanostructure after 20 d cycle acetone gas measurement, which facilitated stable reaction between target gas and sensing layer, revealing good stability and reproducibility. Results and Discussion Material Synthesis and Structural CharacterizationFigure 1a illustrates the two-step hydrothermal synthesis method of Mn 3 O 4 /Zn 2 SnO 4 heterostructures. γ-MnOOH Hybrid 1D nanomaterials with hierarchical structure have received a great deal of attention as sensing materials for gas sensors due to their high surface area, excellent catalytic performance, and robust structure. Novel Zn 2 SnO 4 nanorod-decorated Mn 3 O 4 nanowire 1D nanostructures are prepared by a two-step hydrothermal method and subsequent heat treatment for application in gas sensors. The branch-like Mn 3 O 4 /Zn 2 SnO 4 composite-based sensor exhibits high sensitivity and excellent selectivity for the detection of acetone gas. Importantly, the sensitivity of acetone-gas sensor can be imp...

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Highly sensitive hybrid nanofiber-based room-temperature CO sensors: Experiments and density functional theory simulations

Cited by 45 publications

References 39 publications

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

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

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction

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Highly sensitive hybrid nanofiber-based room-temperature CO sensors: Experiments and density functional theory simulations

Cited by 45 publications

References 39 publications

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

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

Gas Sensors Based on Chemi-Resistive Hybrid Functional Nanomaterials

Constructing Hierarchical Heterostructured Mn3O4/Zn2SnO4 Materials for Efficient Gas Sensing Reaction

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Constructing Hierarchical Heterostructured Mn₃O₄/Zn₂SnO₄ Materials for Efficient Gas Sensing Reaction