Effect of Fe on Bi2Te3: Structure, magnetic properties, and XPS valence band

Arévalo-López, E.P.; Romero-Moreno, P.; Rosas-Huerta, J.L.; Huerta, L.; Minaud, Claire; Marquina, M.L.; Escamilla, R.; Romero, M.

doi:10.1016/j.jallcom.2021.163297

Cited by 32 publications

(12 citation statements)

References 53 publications

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“…32 By contrast, RF-Fe 3+ exhibits a slightly shifted peak at 23.6°(d = 3.76 Å), which can be ascribed to the doped Fe species as the joint sites. In addition, XPS spectra reveals the coexistence of C, O, and Fe elements (Figure 1d), and the existence form of the Fe moiety is mainly the oxide of Fe (Figure 1e), 36 which is further verified by the elemental mapping images (Figure 1f). These results strongly support the successful loading of Fe on RF, and the Fe content is ∼0.13 wt %.…”

Section: ■ Results and Discussionmentioning

confidence: 81%

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H₂O₂

et al. 2023

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The peroxidase (POD)-like nanozyme typically requires the addition of exogenous H 2 O 2 . To address the limitation, previous work mainly adopted a cascade strategy for H 2 O 2 production. Herein, we propose a new light-driven self-cascade strategy to construct POD-like nanozymes without exogenous H 2 O 2 . The model nanozyme resorcinol−formaldehyde resin-Fe 3+ (RF-Fe 3+ ) is synthesized with the hydroxyl-rich photocatalytic material RF as the carrier to in situ chelate metal oxides, which can simultaneously achieve the functions of in situ H 2 O 2 generation under irradiation and substrate oxidation via POD-like behavior. Notably, RF-Fe 3+ exhibits high affinity to H 2 O 2 , attributed to the excellent adsorption ability and hydroxyl-rich feature of RF. Furthermore, the dual photoelectrode-assisted photofuel cell was further constructed with a high-power density of 120 ± 5 μW cm −2 based on the RF-Fe 3+ photocathode. This work not only demonstrates the new selfcascade strategy of in situ generation of catalysis substrates but also provides an opportunity to extend the catalytical field.

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Section: ■ Results and Discussionmentioning

confidence: 81%

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H₂O₂

et al. 2023

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“…As shown in Figure 1g, Bi 4f show two peaks at 163.9 and 158.5 eV, corresponding to Bi 4f 5/2 and Bi 4f 7/2 , respectively. Similarly, as shown in Figure 1h, the binding energies of 572.1 and 581.9 eV can be attributed to Te 3d 5/2 and Te 3d 3/2 , respectively [ 9a,19 ] (Figure 1h). The stoichiometric ratio of Bi/Te was 2:2.98.…”

Section: Resultsmentioning

confidence: 82%

Hydrogen‐Assisted Synthesis of Large‐Size 2D Bismuth Telluride Flakes for Broadband Photodetection up to 2 µm

Zhao

Zhong

Wang

et al. 2022

Advanced Optical Materials

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remote sensing, military reconnaissance, and medical examination. [2] Recently, photo detectors based on 2D materials and their heterostructures have attracted more and more attention. Thanks to diverse electronic band structures, 2D materials can cover a wide spectral range from ultraviolet-visible-infrared (IR)-terahertz (TH) frequencies. [3] Typical 2D materials include graphene, black phosphorous (BP), and transition metal dichalcogenides (TMDCs). Unfortunately, graphene photodetectors are limited due to the unavoidable large dark current caused by zero band gap and low absorption. [4] TMDCs (MX 2 , M = Mo, W, X = S, Se) are only limited to the visible band due to their wide bandgap (1-2.5 eV). [5] Black phosphorus (BP) has outstanding photodetection properties in the mid-infrared band and ultrahigh mobility (1000 cm 2 V −1 s −1 at room temperature). However, the instability of BP seriously limits its synthesis and application. [6] Therefore, it is urgent to develop new materials with suitable bandgap, high mobility, and air stability for broadband photodetection.Topological insulators have metallic Dirac-like surface states and insulating bulk states. The unique structure offers attractive features such as wide spectral absorption and layerdependent surface band structure, [7] which is beneficial to its application in broadband photodetection. Some topological insulator-based photodetectors have shown excellent optoelectronic performance in the visible-IR-THz band. [1a,3d,8] Among various 2D topological materials, Bi 2 Te 3 has a suitable band gap (0.16-1.36 eV), ultra-high mobility, and excellent air stability. [9] These outstanding properties enable Bi 2 Te 3 to be a promising candidate for high-performance broadband photodetectors. [8b,9c,10] However, further development of Bi 2 Te 3 -based photodetectors is limited by the fact that Bi 2 Te 3 single flakes are currently only available with a lateral size of up to few tens of micrometers. Up to now, there are various methods for synthesizing Bi 2 Te 3 , including mechanical exfoliation, [9a] molecular beam epitaxy (MBE), [11] liquid phase synthesis, [9c,10b,12] and chemical vapor deposition (CVD). [8b,13] Mechanical exfoliation is only suitable for proof-of-concept because of its low yield and tiny size. [9a] Although high-quality and large-scale Bi 2 Te 3 single crystals can be obtained by MBE, the technique still suffers from high cost, long time consuming (growth rate is Broadband photodetection including optical communication wavelength band is of great significance because of the great potential for various civilian and military applications. Topological insulators with unique surface electronic states have attracted more and more attention in broadband photo detection. Among them, due to its suitable band gap (0.16-1.36 eV), ultra-high mobility, and excellent air stability, 2D bismuth telluride (Bi 2 Te 3 ) is regarded as a promising candidate. However, the growth of large-size Bi 2 Te 3 is challenging because of the poor chemical reactivit...

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“…The diffraction patterns are fit into diffraction lines of (1 0 1), (1 0 5), (1 0 1 0), (1 1 0), (2 0 5), (0 2 1 0), (1 1 1 5), and (1 2 5). [39][40][41] Figure 1f shows the resistance against the reduction cycle of Bi 2 Te 3 TE fabric. The resistance decreases with the number of reduction cycles because the number of Bi 2 Te 3 NPs increases with an additional reduction, resulting in electrically favorable conformation.…”

Section: Resultsmentioning

confidence: 99%

Multi‐Functional and Stretchable Thermoelectric Bi₂Te₃ Fabric for Strain, Pressure, and Temperature‐Sensing

Kwon

Lee

Won

et al. 2023

Adv Funct Materials

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Fiber‐based electronics are essential components for human‐friendly wearable devices due to their flexibility, stretchability, and wearing comfort. Many thermoelectric (TE) fabrics are investigated with diverse materials and manufacturing methods to meet these potential demands. Despite such advancements, applying inorganic TE materials to stretchable platforms remains challenging, constraining their broad adoption in wearable electronics. Herein, a multi‐functional and stretchable bismuth telluride (Bi2Te3) TE fabric is fabricated by in situ reduction to optimize the formation of Bi2Te3 nanoparticles (NPs) inside and outside of cotton fabric. Due to the high durability of Bi2Te3 NP networks, the Bi2Te3 TE fabric exhibits excellent electrical reliability under 10,000 cycles of both stretching and compression. Interestingly, intrinsic negative piezoresistance of Bi2Te3 NPs under lateral strain is found, which is caused by the band gap change. Furthermore, the TE unit achieves a power factor of 25.77 µWm−1K−2 with electrical conductivity of 36.7 Scm−1 and a Seebeck coefficient of −83.79 µVK−1 at room temperature. The Bi2Te3 TE fabric is applied to a system that can detect both normal pressure and temperature difference. Balance weight and a finger put on top of the 3 × 3 Bi2Te3 fabric assembly are differentiated through the sensing system in real time.

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Effect of Fe on Bi2Te3: Structure, magnetic properties, and XPS valence band

Cited by 32 publications

References 53 publications

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H₂O₂

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H₂O₂

Hydrogen‐Assisted Synthesis of Large‐Size 2D Bismuth Telluride Flakes for Broadband Photodetection up to 2 µm

Multi‐Functional and Stretchable Thermoelectric Bi₂Te₃ Fabric for Strain, Pressure, and Temperature‐Sensing

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Effect of Fe on Bi2Te3: Structure, magnetic properties, and XPS valence band

Cited by 32 publications

References 53 publications

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H2O2

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H2O2

Hydrogen‐Assisted Synthesis of Large‐Size 2D Bismuth Telluride Flakes for Broadband Photodetection up to 2 µm

Multi‐Functional and Stretchable Thermoelectric Bi2Te3 Fabric for Strain, Pressure, and Temperature‐Sensing

Contact Info

Product

Resources

About

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H₂O₂

Light-Driven Self-Cascade Peroxidase-like Nanozymes without Exogenous H₂O₂

Multi‐Functional and Stretchable Thermoelectric Bi₂Te₃ Fabric for Strain, Pressure, and Temperature‐Sensing