Nanomaterials
·
2023
·Vol. 13
·期 21
·2894
·
IF 5.3
Fang Zhou,Weichang Zhou,Yujing Zhao,Li Liu
Bi2Te3has been extensively used because of its excellent thermoelectric properties at room temperature. Here, 230–420 nm of Bi2Te3hexagonal nanosheets has been successfully synthesized via a “green” method by using ethylene glycol solution and applying polyvinyl pyrrolidone (PVP) as a surfactant. In addition, factors influencing morphological evolution are discussed in detail in this study. Among these parameters, the reaction temperature, molar mass of NaOH, different surfactants, and reaction duration are considered as the most essential. The results show that the existence of PVP is vital to the formation of a plate-like morphology. The reaction temperature and alkaline surroundings played essential roles in the formation of Bi2Te3single crystals. By spark plasma sintering, the Bi2Te3hexagonal nanosheets were hot pressed into solid-state samples. We also studied the transport properties of solid-state samples. The electrical conductivityσwas 18.5 × 103Sm−1to 28.69 × 103Sm−1, and the Seebeck coefficientSwas −90.4 to −113.3 µVK−1over a temperature range of 300–550 K. In conclusion, the observation above could serve as a catalyst for future exploration into photocatalysis, solar cells, nonlinear optics, thermoelectric generators, and ultraviolet selective photodetectors of Bi2Te3nanosheet-based photodetectors.
研究领域:
材料科学
·
纳米技术
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 5
·2697-2704
·
IF 1.491
Liu Shuai,Peng Nan,Bai Yu,Ma Dayan,Ma Fei,Xu Kewei
Cu-doped Bi 2 Te 3 hexagonal nanoplates were fabricated by a simple solvothermal method. Scanning electron microscopy and transmission electron microscopy characterization illustrated that the nanoplates are single-crystal ones with an average width of 300 nm and thickness in the range of 20–30 nm. It was demonstrated that Cu
x
Bi 2 Te 3 nanoplates possess the lowest thermal conductivity (0.8–1.2 W/m K) at 300 K, which is mainly due to the enhanced phonon scattering by grain boundaries. Furthermore, the doped Cu could evidently enhance the power factor of Bi 2 Te 3 through optimizing the carrier transport properties. As a result, Cu 0.02 Bi 2 Te 3 nanoplates exhibit the best thermoelectric performance with a figure of merit of 0.33, which is more than two times higher than that of Bi 2 Te 3 nanoplates.
研究领域:
材料科学
·
热电材料研究
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Hui Long,Yongxin Qian,Shuangfu Gang,Wenguang Zhang,Boyu Yang,Yingchao Wei,Bo Wang,Wang Li,Qinghui Jiang
Intensifying the severity of electromagnetic (EM) pollution in the environment represents a significant threat to human health and results in considerable energy wastage. Here, we provide a strategy for electricity generation from heat generated by electromagnetic wave radiation captured from the surrounding environment that can reduce the level of electromagnetic pollution while alleviating the energy crisis. We prepared a porous, elastomeric, and lightweight Bi2Te3/carbon aerogel (CN@Bi2Te3) by a simple strategy of induced in situ growth of Bi2Te3 nanosheets with three-dimensional (3D) carbon structure, realizing the coupling of electromagnetic wave absorption (EMA) and thermoelectric (TE) properties. With ultra-low thermal conductivity (0.07 W m–1 K–1), the CN@Bi2Te3 composites achieved a minimum reflection loss (RL) of 51.30 dB and an effective absorption bandwidth (EAB) of 6.20 GHz at an optimal thickness of 2.8 mm. Additionally, under a temperature gradient of 80 K, the flexible thermoelectric generator (FTEG) system generates a maximum output power of 42.2 μW. By absorbing 2.45 GHz microwaves to build the temperature difference, the EMA-TE-coupled device achieves an optimal Uoc of 38.4 mV, a short-circuit current of 1.03 mA, and an output power of 9.87 μW upon a radiation time of 50 s. This work establishes a potential pathway for further recycling electromagnetic energy in the environment, which is also promising for the preparation of large-area flexible EM to electrical energy conversion devices.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaona Chen,Linan Feng,Penglu Yu,Chan Liu,Jinle Lan,Yuan-Hua Lin,Xiaoping Yang
Flexible thermoelectric materials and devices have gained wide attention due to their capability to stably and directly convert body heat or industrial waste heat into electric energy. Many research and synthetic methods of flexible high-performance p-type thermoelectric materials have made great progress. However, their counterpart flexible n-type organic thermoelectric materials are seldom studied due to the complex synthesis of conductive polymer and poor stability of n-type materials. In this work, bismuth tellurium (Bi2Te3) nanosheets are in situ grown on single-walled carbon nanotubes (SWCNTs) assisted by poly(vinylpyrrolidone) (PVP). A series of flexible SWCNTs@Bi2Te3 composite films on poly(vinylidene fluoride) (PVDF) membranes are obtained by vacuum-assisted filtration. The high electrical conductivity of 253.9 S/cm, and a corresponding power factor (PF) of 57.8 μW/m·K2 is obtained at 386 K for SWCNTs@Bi2Te3-0.8 film. Moreover, high electrical conductivity retention of 90% can be maintained after a 300-cycle bending test and no obvious attenuation can be detected after being stored in an Ar atmosphere for 9 months, which exhibits good flexibility and excellent stability of the SWCNTs@Bi2Te3 composite films. This work shows a convenient method to fabricate n-type and flexible thermoelectric composite film and further promotes the practical application of n-type flexible thermoelectric materials.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 33
·期 3
·2210098
·
IF 19.924
Siyu Wang,Yuqian Qiao,Xiangmei Liu,Shengli Zhu,Yufeng Zheng,Hui Jiang,Yu Zhang,Jie Shen,Zhaoyang Li,Yanqin Liang,Zhenduo Cui,Paul K. Chu,Shuilin Wu
Temperature variation-induced thermoelectric catalytic efficiency of thermoelectric material is simultaneously restricted by its electrical conductivity, Seebeck coefficient, and thermal conductivity. Herein, Bi 2 Te 3 nanosheets are in situ grown on reduced graphene oxides (rGO) to generate an efficient photo-thermoelectric catalyst (rGO-Bi 2 Te 3 ). This system exhibits phonon scattering effect and extra carrier transport channels induced by the formed heterointerface between rGO and Bi 2 Te 3 , which improves the power factor value and reduces thermal conductivity, thus enhancing the thermoelectric performance of 2.13 times than single Bi 2 Te 3 . The photo-thermoelectric catalysis of rGO-Bi 2 Te 3 significantly improves the reactive oxygen species yields, resulting from the effective electron–hole separation caused by the unique thermoelectric field and heterointerfaces of rGO-Bi 2 Te 3 . Correspondingly, the electrospinning membranes containing rGO-Bi 2 Te 3 nanosheets exhibit high antibacterial efficiency in vivo (99.35 ± 0.29%), accelerated tissue repair ability, and excellent biosafety. This study provides an insight into heterointerface design in photo-thermoelectric catalysis.
研究领域:
材料科学
·
生物医学工程
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
Biomaterials Science
·
2020
·Vol. 8
·期 21
·5874-5887
·
IF 6.183
Zhihao Zhou,Wei Zhang,Lei Zhang,Yang Cao,Zhigang Xu,Yuejun Kang,Peng Xue
Two-dimensional Bi2Te3 nanosheets (NSs) have recently been validated as a new type of photothermal agent to provide an alternative option for tumor ablation via light-induced hyperthermia. However, the surface of Bi2Te3 NSs lacks active radicals for the conjugation of functional molecules, which undoubtedly impedes their versatile utilization in medical areas. Here, the surface activation of Bi2Te3 NSs was accomplished via the in situ growth of an SiO2 nanoshell assisted by tetraethyl orthosilicate (TEOS). Upon the co-condensation of (3-aminopropyl)triethoxysilane (ATPES), terminal amino groups (–NH2) were generated on the surface of the Bi2Te3@SiO2 NSs, which were further covalently coupled with the photosensitizer chlorin e6 (Ce6) through a standard amide reaction. The resultant Bi2Te3@SiO2/Ce6 (BSC) NSs displayed admirable photothermal properties, a high Ce6 loading capacity, and good biocompatibility. Upon dual-wavelength laser irradiation, an excellent tumor suppression effect arising from thermal ablation and reactive oxygen species (ROS)-induced apoptosis was verified both in cell experiments and in animal studies. In addition, synchronous fluorescence/photoacoustic/infrared (FL/PA/IR) tri-modal imaging could provide useful information for both tumor diagnosis and prognosis. Overall, this facile strategy for the activation of Bi2Te3 is regarded to be universal for the development of more versatile Bi2Te3-based nanoplatforms, which should favor the rapid diagnosis and effective treatment of fatal diseases.
研究领域:
纳米医学
·
癌症治疗
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Min Liu,Shuli Yin,Tianlun Ren,You Xu,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
The design of Au-based materials with good dispersion and more active sites is critical to enhance the catalytic performance of electrochemical ammonia production. Herein, two-dimensional (2D) heterojunction Au-Bi2Te3 nanosheets (Au-Bi2Te3 NSs) are prepared by Au nanoparticles growing on Bi2Te3 nanosheets. Benefiting from the good dispersion of Au nanoparticles and the synergistic effect of the heterojunction composite, Au-Bi2Te3 NSs demonstrate excellent behavior for an ambient nitrogen reduction reaction (NRR). In a 0.1 M Na2SO4 electrolyte (N2-saturated), Au-Bi2Te3 NSs display a high NH3 yield rate of 32.73 μg h–1 mgcat.–1 and a faradic efficiency of 20.39% at −0.4 V. The proposed synthetic method provides a feasible strategy for designing high-performance heterojunction electrocatalysts for electrochemical ammonia synthesis.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Muhammad Umar,Govinda Mandal,Rui Lv,Ruochen Guo,Shunli Yang,Gang Lang,M Awais,Kashmala Gul,M. Sajjad Hasan,Jian Liu
Accurate and sensitive detection of small biomolecules like saccharides in foods and beverages remains challenging due to their difficulty in ionization and the interferences of the fragments derived from the conventional organic matrices in laser desorption/ionization mass spectrometry (LDI-MS). Here, we present a methodology based on Bi2Te3 nanomatrix for LDI-MS, enabling the rapid, specific, and sensitive detection of saccharides such as glucose, 13C-glucose, trehalose, maltotetraose, and maltohexaose. The Bi2Te3 nanomatrix demonstrated efficient analytical performance compared to traditional organic matrices (CHCA and DHB) by reducing spectral interferences and enhancing detection specificity and sensitivity. A strong linear response (R2 = 0.9925) for glucose quantification was achieved, with a low limit of detection (LOD) of 0.25 µg/mL (1.39 pmol). This method was validated through glucose quantification in three commercial soft drinks: one sugar-labeled (soft drink-1) and two sugar-free (soft drinks 2 and 3). Glucose concentrations were 11.11%, 0.01%, and undetectable, with corresponding recovery rates of 107.52%, 73.04%, and 79.66%, respectively. This study provides insights for developing advanced LDI nanomatrices, designed for the specific and sensitive detection of small biomolecules in food and beverage products.
研究领域:
分析化学
·
纳米技术
·
质谱分析
·
食品科学
·
生物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）