Tellurene based chemical sensor

Wang, Dawei; Lan, Tiansong; Fan, Chengyu; Pan, Jianbin; Liu, Zhu; Chu, Jifeng; Yuan, Huan; Wang, Xiaohua; Rong, Mingzhe; Koratkar, Nikhil

doi:10.1039/c9ta09429f

Cited by 108 publications

(82 citation statements)

References 38 publications

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“…However, such methods face critical challenges in terms of scalability, control over thickness, substrate-free growth, and sensitivity to growth conditions which inhibits its application, especially for energy storage where scalable manufacturing is essential 16 . The recently discovered, hydrothermal method 17,18 can overcome these limitations, and was therefore used in this study for synthesis of Te (grey colored powder, inset of figure S1a) (details regarding the growth mechanism and procedures are provided in Methods).…”

Section: Synthesis Of Tellurenementioning

confidence: 99%

“…To circumvent this, tellurium-based nanostructures have been synthesized using several methods, which typically lead to the formation of 1-D tellurium structures (such as nanowires or nanotubes) due to the anisotropic structure of bulk tellurium 16 . However, recently a controllable hydrothermal method has been developed that can lead to the formation of 2-D Tellurium or Tellurene (Te) 17,18 . Te has many attractive features when compared to other materials in the 2D family 16 .…”

Section: Introductionmentioning

confidence: 99%

“…XRD data was obtained through Bruker D2 PHASER using Cu/K α radiation ( λ = 1.5418 Å) at 40 kV and 30 mA. XPS was obtained using PHI 5000 versa probe system using Al K α radiation ( ~1486 eV) 18,41 .…”

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confidence: 99%

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Alloying of Alkali Metals with Tellurene

Jain

Yuan

Singh

et al. 2020

Preprint

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Graphite is ubiquitous as the anode material in lithium-ion batteries, but offers relatively low volumetric capacity (330 to 430 mAh cm-3). By contrast, Tellurene (Te) is expected to alloy with alkali metals with high volumetric capacity (~2620 mAh cm-3), but to date there is no detailed study on its alloying behavior. In this work, we have investigated the alloying response of a range of alkali metals (A = Li, Na or K) with few-layer Te. In-situ transmission electron microscopy and density functional theory both indicate that Te alloys with alkali metals forming A2Te. However, the crystalline order of alloyed products varied significantly from single-crystal (for Li2Te) to polycrystalline (for Na2Te and K2Te). It is well established that typical alloying materials (e.g., silicon, tin, black phosphorous) lose their crystallinity when reacted with Li. The ability of Te to retain its crystallinity is therefore surprising. Nudged elastic band calculations and ab-initio molecular dynamics simulations reveal that compared to Na or K, the migration of Li is highly “isotropic” in Te, enabling its crystallinity to be preserved. Such isotropic Li transport is made possible by Te’s peculiar structure comprised of chiral chains bound by van der Waals forces. To evaluate the electrochemical performance of Te, we tested Te electrodes in half-cells vs Li/Na/K metal. While alloying with Na and K showed poor performance, with Li, the Te electrode exhibited a volumetric capacity of ~700 mAh cm-3, which is about two-times the practical capacity of commercial graphite. Such Te based batteries could play an important role in applications where high volumetric energy and power density are of paramount importance.

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Section: Synthesis Of Tellurenementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Alloying of Alkali Metals with Tellurene

Jain

Yuan

Singh

et al. 2020

Preprint

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“…To realize the novel applications of Te NMs, a simple and feasible strategy for synthesizing Te NMs with a controllable and uniform topography in a green method is urgently required. 1,17 To date, various morphologies, such as nanowires, 18 nanorods, 19 nanotubes, 20 nanoflakes, 21 and even tellurene, 22 of Te NMs have been investigated, and the corresponding growth mechanisms have also been developed. For example, the solid-solution-solid growth mechanism and the nucleation-dissolution-recrystallization growth mechanism have been proposed for the generation of Te NWs 23 and Te nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of air-stable tellurium nanowires via biomolecule-assisted hydrothermal for thermoelectrics

et al. 2020

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“…In addition, researchers confirmed that the metal-doped TiO2 sensitive materials have been investigated for application in detecting H2, O2, NO2 and NO, showing a broad application prospect [29][30][31]. Studies showed that sputtering 10 nm thick Pd on the surface of TiO2 nanotubes by thermal evaporation can improve the sensitivity of TiO2 nanotube gas sensor and shorten the recovery time [32][33][34][35]. Furthermore, researchers studied the geometric structures and interactions between Pd cluster and TiO2 nanotubes, where the Pd atom number from 1 to 5 were taken into consideration [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Influence of Pd Clusters Doping on Gas Sensing Properties of TiO₂(101) Nanotubes to SF₆ Decomposition Products

Chen

Tao

et al. 2020

IEEE Access

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Detection and analysis of sulfur hexafluoride (SF6) decomposition components is one of the most used methods to realize online monitoring of gas insulated switchgear (GIS) faults. In this paper, Pd3doped anatase TiO2(101) surface was constructed, and studied about its geometric and electronic properties to characteristic SF6 decomposition products: SOF2 and SO2F2 based on DFT calculations. Comparing with intrinsic TiO2(101), the conductivity of Pd3-TiO2(101) surface decreases dramatically. Studies on adsorption energy, charge transfer, and adsorption distance show that Pd3-TiO2(101) shows strong chemisorption to SOF2 and SO2F2 molecules. Based on density of states and molecular orbital theory analysis, it is found that the adsorption of SOF2 and SO2F2 can dramatically change the conductivity in different degrees. As a result, the Pd3-TiO2(101) surface exhibits high gas sensitivity and selectivity to SOF2 and SO2F2 molecules. Our calculations would be meaningful for the development of new sensing materials for SF6 decomposition components detection.

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Tellurene based chemical sensor

Abstract: Chemiresistive sensor devices using two-dimensional (2D) materials have been extensively studied.

Cited by 108 publications

References 38 publications

Alloying of Alkali Metals with Tellurene

Alloying of Alkali Metals with Tellurene

Green synthesis of air-stable tellurium nanowires via biomolecule-assisted hydrothermal for thermoelectrics

Influence of Pd Clusters Doping on Gas Sensing Properties of TiO₂(101) Nanotubes to SF₆ Decomposition Products

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