SOLID STATE SCIENCES
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2024
·
IF 3.4
Liming Zhu,Dezhu Sun,Xuyang Li,Wei Liu,Jiaqiang Huang,Caihang Liang,Xiaokai Hu
Bismuth telluride and lead telluride are typical thermoelectric semiconductors that are metallized for electrical contacts before being assembled into devices. In this study, three iron-group metals of nickel cobalt iron, were chemically plated on n-type bismuth telluride as the prospective contact material for adhesion and barrier in soldering connection with copper. Aluminum was used as the sacrificial anode to ensure iron deposition. The sensitization in borohydride solution facilitated the subsequent plating of metals. The plating rates were determined by gravimetric method. The crystalline structure and morphology of films were characterized. Electrochemical polarizations were undertaken to compare the driving force among three plating reactions through the reduction of metallic cations and the oxidation of hypophosphite anions with the mixed potential theory. The heterojunction of bismuth telluride with copper was fabricated by reflow soldering with Sn 95 Sb 5 foil, and the interfacial resistivity was evaluated by multiple resistance measurements across the junction.
研究领域:
材料科学
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电化学
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热电学
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DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Fangfang Ren,Hongjun Pan,Cheng Wang,Yukou Du
Graphical Two-dimensional hexagonal bismuth telluride (Bi 2 Te 3 ) nanosheet were successfully synthesized by a facile solvothermal method, and then coupled with Pd by a microwave-assisted ethylene glycol reduction method to obtain the Pd/Bi 2 Te 3 composite, which delivered superior catalytic performance for the electrooxidation of glycerol in alkaline medium. Designing high-performance anodic catalysts to drive glycerol oxidation reaction (GOR) is essential for advancing direct alcohol fuel cells. Coupling Pd with oxophilic materials is an effective strategy to enhance its intrinsic catalytic activity. In this study, we successfully synthesized Pd/Bi 2 Te 3 catalysts with tunable compositions, using Bi 2 Te 3 as a novel promoter, and applied them to the GOR for the first time. Electrocatalytic tests revealed that the activity of the Pd/Bi 2 Te 3 catalysts was closely linked to their compositions. Among these catalysts, the optimized Pd/Bi 2 Te 3 -20 % showed potential to replace the commercial Pd/C catalyst, exhibiting a peak current density 5.2 times higher than that of the benchmark Pd/C catalyst. Furthermore, improved catalytic stability and faster catalytic kinetics were observed for Pd/Bi 2 Te 3 -20 %. The synergistic effect between Pd and Bi 2 Te 3 is responsible for the high performance of the Pd/Bi 2 Te 3 -20 % catalyst.
研究领域:
材料科学
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电化学
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能源技术
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产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 15
·5331
·
IF 3.748
Min Sun,Pengyu Zhang,Qingmin Li,Guowu Tang,Ting Zhang,Dongdan Chen,Qi Qian
N-type bismuth telluride (Bi2Te3) based thermoelectric (TE) fibers were fabricated by thermal drawing and Bridgman annealing, and the influence of Bridgman annealing on the TE properties of n-type Bi2Te3-based TE fibers was studied. The Bridgman annealing enhanced the electrical conductivity and Seebeck coefficient because of increasing crystalline orientation and decreasing detrimental elemental enrichment. The TE performance of n-type Bi2Te3-based TE fibers was improved significantly by enhancing the power factor. Hence the power factor increased from 0.14 to 0.93 mW/mK2, and the figure-of-merit value is from 0.11 to 0.43 at ~300 K, respectively.Keywords:n-type Bi2Te3;thermoelectric fibers;thermal drawing;Bridgman annealing
研究领域:
材料科学
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热电学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2017
·Vol. 28
·期 23
·235604
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IF 3.44
Changcun Li,Fangfang Kong,Congcong Liu,Huixuan Liu,Yongjing Hu,Tongzhou Wang,Jingkun Xu,Fengxing Jiang
The wet-chemical approach is of great significance for the synthesis of two-dimensional (2D) bismuth telluride nanoplatelets as a potential thermoelectric (TE) material. Herein, we proposed a simple and effective solution method with the assistance of aniline for the fabrication of bismuth telluride nanoplatelets at a low temperature of 100 °C. The choice of aniline with its dual function avoided the simultaneous use of a capping regent and a toxic reductant. The as-synthesized nanoplatelets have a large size of more than 900 × 500 nm2 and a small thickness of 15.4 nm. The growth of bismuth telluride nanoplatelets are related to the Bi/Te ratio of precursors indicating that a larger content of the Bi precursor is more conducive to the formation of 2D nanoplatelets. The bismuth telluride nanoplatelets pressed into a pellet show a smaller electrical resistivity (∼6.5 × 10−3 Ω · m) and a larger Seebeck coefficient (−135 μV K−1), as well as a lower thermal conductivity (0.27 W m−1 K−1) than those of nanoparticles. The next goal is to further reduce the electrical resistivity and optimize the TE performance by disposing of the residual reactant of aniline adsorbed on the surface of the nanoplatelets.
研究领域:
材料科学
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能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Jin Liu,Liexiang Ren,Jujie Luo,Ning Lv
In this study, bismuth telluride–based hybrids consisting of nanosheets were successfully prepared by disproportionation induced by microwave irradiation and applied on supercapacitor electrodes. Various analytical techniques were adopted to analyze the structure and composition of Bi 2 Te 3 /Bi 2 TeO 5 . The unique disproportionation (Te 0 →Te 2+ +Te 4+ ) results in an interlocking nanosheet, in which the lamellar interspersed structure on the lamella can be visualized through high-magnification scanning electron microscopy. The large layer spacing with the interspersed structure provides more storage sites for electrolyte ion interactions and allows for better stabilization of the electrode structure. Result of electrochemical studies indicates that Bi 2 Te 3 /Bi 2 TeO 5 enables a capacity of 860 F g −1 (1 A g −1 ) and maintains 74.5% of the initial capacity through 2000 charge/discharge cycles. The Bi 2 Te 3 /Bi 2 TeO 5 anode is integrated into an ultracapacitor to attain a remarkable energy density of 89 Wh kg −1 in 6 M KOH.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
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IF 9.5
Ling Li,Ningqiang Shi,Xiangqian Jiang,Weiping Chen,Chuncheng Ban,Jiandong Hao
Energy recovery and reuse, industrial waste heat, and thermal energy recovery and conversion in emerging electronic devices are topics of widespread interest. Flexible composite thermoelectric (TE) films have become the key to TE conversion, and many studies and synthesis methods related to them have made great progress. However, little research has been performed on the corresponding composites of typical TE materials with low-dimensional nanotubular materials, particularly modulation of the overall TE properties using doped low-dimensional nanotubular materials. In this work, high-quality bismuth telluride (Bi2Te3) nanowires and boron nitride nanotubes (BNNTs) were prepared using electrolytic deposition and high-temperature catalytic deposition, respectively. Bi2Te3–BNNTs composite films were prepared using a solvent hot pressing method. The Bi2Te3–BNNTs composite film conductivity reached 179.6 S/cm at room temperature (300 K), the corresponding Seebeck coefficient was 171.4 μV/K, and the power factor (PF) was 52.8 nW/mK2. Carbon doping of BNNTs resulted in carbon–boron nitride nanotubes (BCNNTs), and Bi2Te3–BNNTs composite films were prepared. The Bi2Te3–BCNNTs composite films obtained a conductivity of 4629.6 S/cm, at room temperature (300 K), a corresponding Seebeck coefficient of 181.2 μV/K, and a PF of 1520.0 nW/mK2. This study has important reference value for the application of TE conversion. Moreover, the electrical conductivity decreased by no more than 10% after 400 cycles of bending tests, and the electrical conductivity showed signs of recovery after repressing thermally, which undoubtedly proves that Bi2Te3–BCNNTs composite films have good flexibility and thermal stability, and this has contributed to the application and promotion of flexible thermoelectric materials.
研究领域:
材料科学
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能源工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
·
2018
·Vol. 54
·期 1
·84-91
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IF 0.88
Pei L. Z.,Wei T.,Lin N.,Zhang H.,Fan C. G.
Bismuth tellurate nanospheres have been successfully synthesized by a facile hydrothermal route. X-ray diffraction (XRD) shows that the nanospheres are composed of orthorhombic Bi 2 Te 2 O 7 phase. Scanning electron microscopy (SEM) displays that the diameter of the nanospheres is 100–500 nm. The bismuth tellurate nanospheres (BTS) modified glassy carbon electrode (GCE) has been prepared for the electrochemical detection of L-cysteine (L-CySH). A pair of semi-reversible CV peaks at +0.14 V and–0.84 V, respectively are observed. The BTS modified GCE displays high electrocatalytic activity toward L-CySH and exhibits a linear relationship in the range of 0.0001–2 mM with a detection limit of 0.046 μM in KCl solution. The broad linear range, low detection limit, good reproducibility and stability make the BTS modified GCE valuable for the practical application.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 25
·1900304
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IF 15.621
Bo Wu,Yang Guo,Chengyi Hou,Qinghong Zhang,Yaogang Li,Hongzhi Wang
The fabrication of a flexible thermoelectric (TE) device that contains flexible, all-inorganic hybrid thin films (p-type single-wall carbon nanotubes (SWCNTs)/Sb 2 Te 3 and n-type reduced graphene oxide (RGO)/Bi 2 Te 3 ) is reported. The optimized power factors of the p-type and n-type hybrid thin films at ambient temperature are about 55 and 108 µW m −1 K −2 , respectively. The high performance of these films that are fabricated through the combination of vacuum filtration and annealing can be attributed to their planar orientation and network structure. In addition, a TE device, with 10 couples of legs, shows an output power of 23.6 µW at a temperature gradient of 70 K. A prototype of an integrated photovoltaic-TE (PV-TE) device demonstrates the ability to harvest low-grade “waste” thermal energy from the human body and solar irradiation. The flexible TE and PV-TE device have great potential in wearable energy harvesting and management.
研究领域:
材料科学
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能源技术
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纳米科技
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2014
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IF 4.835
Haijing Yu,Huili Bao,Ke Zhao,Zhonglin Du,Hua Zhang,Xinhua Zhong
Bi2S3 films consisting of two-dimensional interconnected Bi2S3 single-crystalline nanorod networks have been fabricated on a F:SnO2 (FTO) glass substrate through the formation of intermediate BiOI nanosheets from layer-structured BiI3 by chemical vapor deposition and subsequent hydrothermal transformation into Bi2S3 networks. A continuous lattice and structure-directed topotactic transformation mechanism is supposed for the formation of Bi2S3 network film. The prepared Bi2S3/FTO films were employed as counter electrode (CE) for CdSe quantum dot-sensitized solar cells for the first time and showed better photovoltaic performance than that from the convenient Pt CE. The influence of the preparation conditions for Bi2S3/FTO films on the resulting solar cell performance was systematically investigated and optimized with use of J–V curves, scanning electron microscopy (SEM), UV–vis absorption, and electrochemical impedance spectroscopy. To further improve the cell device efficiency, the modification of the Bi2S3 network CE with metal particles was also studied.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 20
·2200146
·
IF 32.086
Zhi Zhang,Zhaozheng Wang,Yunkang Chen,Yuan Feng,Sicheng Dong,Han Zhou,Zhong Lin Wang,Chi Zhang
The semiconductor direct-current triboelectric nanogenerator (SDC-TENG) based on the tribovoltaic effect is promising for developing a new semiconductor energy technology with high power density. Here, the first SDC-TENG built using gallium nitride (GaN) and bismuth telluride (Bi 2 Te 3 ) for ultrahigh-power generation is reported. During the friction process, an additional interfacial electric field is formed by continuous contact electrification (CE), and abundant electron–hole pairs are excited and move directionally to form a junction current that is always internally from Bi 2 Te 3 to GaN, regardless of the semiconductor type. The peak open-circuit voltage can reach up to 40 V and the power density is 11.85 W m −2 (average value is 9.23 W m −2 ), which is approximately 200 times higher than that of previous centimeter-level SDC-TENGs. Moreover, compared to traditional polymer TENGs under the same conditions, the average power density is remarkably improved by over 40 times. This study provides the first evidence of CE on the tribovoltaic effect and sets the normalized power density record for TENGs, which demonstrates a great potential of the tribovoltaic effect for energy harvesting and sensing.
研究领域:
材料科学
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纳米技术
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能量收集
·
半导体物理
✓ 已验证
DOI
高影响因子
ACS Nano
·
2022
·
IF 18.027
Zhenhuan Song,Ting Liu,Haoqiang Lai,Xiaofeng Meng,Liu Yang,Jianyu Su,Tianfeng Chen
Bismuth telluride (Bi2Te3) is an available thermoelectric material with the lowest band gap among bismuth chalcogenides, revealing a broad application in photocatalysis. Unfortunately, its size and morphology related to a radio-catalysis property have rarely been explored. Herein, an ethylenediaminetetraacetic acid (EDTA)-assisted hydrothermal strategy was introduced to synthesize polytypic Bi2Te3 nanoplates (BT NPs) that exhibit size-dependent radio-sensitization and metabolism characteristics in vivo. By simply varying the molar ratio of EDTA/Bi3+ during the reaction, BT NPs with different sizes and morphologies were obtained. EDTA acting as chelating agent and “capping” agent contributed to the homogeneous growth of BT NPs by eliminating dangling bonds and reducing the surface energy of different facets. Further analyzing the size-dependent radio-sensitization mechanism, larger-sized BT NPs generated holes that preferentially catalyzed the conversion of OH– to ·OH when irradiated with X-rays, while the smaller-sized BT NPs exhibited faster decay kinetics producing higher 1O2 levels to enhance radiotherapy effects. A metabolomic analysis revealed that larger-sized BT NPs were oxidized into Bi(Ox) in the liver via a citrate cycle pathway, whereas smaller-sized BT NPs accumulated in the kidney and were excreted in urine in the form of ions by regulating the metabolism of glutamate. In a cervical cancer model, BT NPs combined with X-ray irradiation significantly antagonized tumor suppression through the promotion of apoptosis in tumor cells. Consequently, in addition to providing a prospect of BT NPs as an efficient radio-sensitizer to boost the tumor radiosensitivity, we put forth a strategy that can be universally applied in synthesizing metal chalcogenides for catalysis-promoted radiotherapy.
研究领域:
材料科学
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纳米技术
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癌症治疗
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放射生物学
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代谢组学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 4
·781-786
·
IF 0.605
Gao Peng,Chen Lilin,Wu Bo,Zhang Qiming,Xue Chao,Hou Chengyi,Sun Qiang
An optimal structure design of the lattice mismatched GaInP/GaInAs/Ge solar cell with high photoelectric conversion efficiency was proposed. Two-dimensional Bi 2 Te 3 and Sb 2 Te 3 nanosheets were prepared by solvothermal synthesis method used as thermoelectric (TE) functional materials, which is further hybrid with high conductive reduced graphene oxide (rGO) and carbon nanotubes (CNTs). TE film was then fabricated based on above materials. The power factor of the n -type TE film is 19.31 μW/mK 2 , and the power factor of the p -type TE film is 97.40 μW /mK 2 . The flexible TE device was integrated with flexible solar cell. Compared with the single photovoltaic (PV) cell, the efficiency of the as-prepared flexible integrated device measured under the AM1.5 illumination is significantly improved. The efficiency of the two parallel tests is increased from 27.26% and 26.59%, to 29.11% and 28.92%, respectively. The increasing ratio reaches 6.7%–8.8%.
研究领域:
可再生能源
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材料科学
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热电技术
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光伏技术
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纳米科技
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）