Mulberry-like heterostructure (Fe–O–Ti): a novel sensing material for ethanol gas sensors

Li, Min; Shen, Jianxing; Cheng, Chuanbing; Wang, Tailin; Shen, Yan; Wang, Shuai; Chen, Pan

doi:10.1039/c9ra00619b

Cited by 4 publications

(2 citation statements)

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“…The XPS spectrum of O 1s (figure 3(c)) showed three peaks at 530.9, 529.7, and 528.4 eV, which presented three states of O element, corresponding to Ti-O, Ti-O-Fe, and Fe-O bonding, respectively [42]. As shown in the Ti 2p XPS spectrum (figure 3(e)), the peaks located at 457.74 and 463.48 eV corresponded to Ti-O, which can be ascribed to the oxidation of the Ti 3 C 2 T x surface by Fe 3+ and the formation of Fe-O-Ti bonding [40,43]. Figure 3(d) showed the high-resolution spectrum of N 1s of Fe 2 O 3 @N-Ti 3 C 2 T x .…”

Section: Resultsmentioning

confidence: 96%

In situ construction of N-doped Ti₃C₂T_x confined worm-like Fe₂O₃ nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

Jiang,

Zhang,

Yang

et al. 2023

Nanotechnology

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The development of Fe2O3 as lithium-ion batteries (LIBs) anode is greatly restricted by its poor electronic conductivity and structural stability. To solve these issues, this work presents in situ construction of three-dimensional crumpled Fe2O3@N-Ti3C2Tx composite by solvothermal-freeze-drying process, in which wormlike Fe2O3 nanoparticles (10 ~ 50 nm) in situ nucleated and grew on the surface of N-doped Ti3C2Tx nanosheets with Fe-O-Ti bonding. As a conductive matrix, N-doping endows Ti3C2Tx with more active sites and higher electron transfer efficiency. Meanwhile, Fe-O-Ti bonding enhances the stability of the Fe2O3/N-Ti3C2Tx interface and also acts as a pathway for electron transmission. With a large specific surface area (114.72 m2 g-1), the three-dimensional crumpled structure of Fe2O3@N-Ti3C2Tx facilitates the charge diffusion kinetics and enables easier exposure of the active sites. Consequently, Fe2O3@N-Ti3C2Tx composite exhibits outstanding electrochemical performance as anode for LIBs, a reversible capacity of 870.2 mAh g-1 after 500 cycles at 0.5 A g-1, 1129 mAh g-1 after 280 cycles at 0.2 A g-1 and 777.6 mAh g-1 after 330 cycles at 1 A g-1.

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Section: Resultsmentioning

confidence: 96%

In situ construction of N-doped Ti₃C₂T_x confined worm-like Fe₂O₃ nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

Jiang,

Zhang,

Yang

et al. 2023

Nanotechnology

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“…From the high resolution XPS spectrum of Fe 2p (Figure 2c), the two evident peaks at 712.01 and 716.17 eV are corresponding to Fe 2p3/2 and Fe 2p1/2, respectively. [34,35] Besides, the peak positions of Sn 3d (Figure 2d) at the binding energies of 493.50 and 484.95 eV could be assigned to the spin orbital splitting of the Sn 4+ 3d 3/2 and Sn 4+ 3d 5/2 core level states of tin, respectively, suggesting the standard state of Sn 4+ Figure 2. a,b) XRD patterns of pure SnO 2 and Fe 2 O 3 /SnO 2 nanohybrids (here, the red pattern is α-Fe 2 O 3 , and blue diffraction is SnO 2 ), respectively; c-e) XPS high resolution spectra of Fe 2p, Sn 3d, and O 1s peaks of the Fe 2 O 3 /SnO 2 hierarchically porous sphere, respectively; f) N 2 sorption isotherms, and inset is pore size distribution of Fe 2 O 3 /SnO 2 nanohybrids.…”

Section: Resultsmentioning

confidence: 99%

Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance

Wang

Han

et al. 2020

Adv Materials Inter

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commercial applications both in military and civilian fields. [2-5] From the aspect of safety and environmental quality, gas sensors are becoming more and more important in our daily life, because they can instantly monitor the potential risk of explosive/toxic gas emission or leakage. [6] Acetone, for example, a kind of volatile organic compound (VOCs) with special aroma and colorless transparent nature, which is extensively utilized in micro/ nanoelectronics field, lithography, coatings, leather, pesticides, explosive plastic, rubber, paint, etc. [7-10] Specifically, acetone is also a flammable, explosive, and toxic organic liquid with an ignition point of 465 °C, and the most easily ignitable concentration is 4.5%. [11] Moreover, acetone vapor and air can easily form one explosive mixture with the explosive limit of ≈2.6-12.8%, and the concentration of the maximum explosive pressure is 6.3%. Therefore, once the acetone leakage occurs, it is easy to trigger public safety accident. [12,13] In recent years, MOSs such as SnO 2 , Fe 2 O 3 , ZnO, WO 3 , In 2 O 3 and their hybrids/composites based electronics such as sensors and detectors have allured intensive desire due to the wide application on detecting irritative, malodorous, explosive, and toxic VOC gases. [4,14-19] Unfortunately, gas sensors based on MOSs are still bearing some urgent problems to overcome such as slow response, a narrow detection limit, inferior selectivity, and short-term cycling stability, especially in high humidity conditions. [20,21] Very recently, many strategies have been proposed to relieve the above shortcomings via various intrigues such as rare metal decoration, doping modification technology, heterojunction, microwave-assist, etc. [22-27] Accordingly, some convincible progress and results have been achieved or are pushing forward. In 2019, Lu's group reported that the Au-doped and Au-loaded mesoporous In 2 O 3 exhibited superior acetone sensing performance. It was demonstrated that the sensing performance can be manipulated by different doping or loading methods of Au; Thereafter, the SnO 2 ultrathin films functionalized by single atom Pt could greatly enhance the trietylamine gas sensing performance; [25,28] Then, Chen and his co-workers reported that the p(NiO)/n(ZnO) heterojunction networks could increase the gas sensor response by more than four times, meanwhile, the lower detection limit was achieved. On the other hand, the p-n nanoheterojunction networks displayed a strong and selective response toward acetone and ethanol under Gas sensors based on SnO 2 , Fe 2 O 3 , and their nanocomposites are promising candidates for sensing of acetone, ethanol, hydrogen, NO 2 , ozone, and formaldehyde. In this work, a rational hydrothermal route is designed to prepare α-Fe 2 O 3 /SnO 2 porous sphere arrays assembled with hierarchical nanostructure (denoted as α-Fe 2 O 3 (x%)/SnO 2). The results demonstrate that the α-Fe 2 O 3 (4%)/SnO 2 based sensor exhibits excellent sensing performance, the short response/recovery time of 3 and 4 s, re...

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High pseudocapacitance electrode enabled by heterovalent doping and surface coating for rapid charge storage

Li,

Zhao,

Zhang

et al. 2024

Surface and Coatings Technology

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Mulberry-like heterostructure (Fe–O–Ti): a novel sensing material for ethanol gas sensors

Abstract: The gas sensors have been widely used in various fields, to protect the safety of life and property.

Cited by 4 publications

References 50 publications

In situ construction of N-doped Ti₃C₂T_x confined worm-like Fe₂O₃ nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

In situ construction of N-doped Ti₃C₂T_x confined worm-like Fe₂O₃ nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance

High pseudocapacitance electrode enabled by heterovalent doping and surface coating for rapid charge storage

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Mulberry-like heterostructure (Fe–O–Ti): a novel sensing material for ethanol gas sensors

Abstract: The gas sensors have been widely used in various fields, to protect the safety of life and property.

Cited by 4 publications

References 50 publications

In situ construction of N-doped Ti3C2T x confined worm-like Fe2O3 nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

In situ construction of N-doped Ti3C2T x confined worm-like Fe2O3 nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

Construction of Hierarchical α‐Fe2O3/SnO2 Nanoball Arrays with Superior Acetone Sensing Performance

High pseudocapacitance electrode enabled by heterovalent doping and surface coating for rapid charge storage

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Resources

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In situ construction of N-doped Ti₃C₂T_x confined worm-like Fe₂O₃ nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

In situ construction of N-doped Ti₃C₂T_x confined worm-like Fe₂O₃ nanoparticles by Fe–O–Ti bonding for LIBs anode with superior cycle performance

Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance