MOLECULES
·
2024
·Vol. 29
·期 22
·5242
·
IF 4.2
Chunlei Li,Shun Li,Long Zhao,Jianming Zhang
Harnessing waste heat from environmental or industrial sources presents a promising approach to eco-friendly and sustainable chemical synthesis. In this study, we introduce a thermoelectrocatalytic (TECatal) system capable of utilizing even small amounts of heat for hydrogen peroxide (H2O2) production. We developed a nanohybrid structure, combining carbon nanotubes (CNTs) and Bi2Te3nanoflakes (Bi2Te3/CNTs), through a one-pot synthesis method. Bi2Te3, as a thermoelectric (TE) material, generates charge carriers under a temperature gradient via the Seebeck effect, enabling them to participate in surface redox reactions. However, the rapid recombination of these charge carriers greatly limits the TECatal activity. In the Bi2Te3/CNTs nanohybrid system, the introduction of CNTs substantially enhances the efficiency of H2O2production, as the strong bonding between CNTs and Bi2Te3, along with the excellent conductivity of CNTs, facilitates charge carrier separation and transport, as confirmed by TE electrochemical tests. This study underscores the significant potential of thermoelectric nanomaterials for converting waste heat into green chemical synthesis.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiang Wang,Siliang Wang,Ning Wei,Rangyun Wu,Wei Zeng,Li Wen,Zhiliang Chen,Pengbin Gui,Dong Liang
Recently, metal chalcogenides (MCS) with high conductivity, natural abundance and stable structure are kind of the potential cathode materials of aqueous zinc-ion batteries (ZIBs). However, compared with manganese based and vanadium based cathode materials, there are few studies and reports on MCS in the field of ZIBs. Here, for the first time, 2D layered Bi 2 Te 3 nanosheets were used as cathode to construct a novel aqueous Bi 2 Te 3 /zinc battery. A series of experiments and calculations in this work have verified that Bi 2 Te 3 nanosheets are excellent cathode material for ZIBs. Thanks to robust structure, good electronic conductivity and low zinc ion diffusion energy barrier of Bi 2 Te 3 nanosheets, the aqueous Bi 2 Te 3 /zinc battery exhibits a large reversible capacity of 413.2 mAh/g (0.4 A/g) and long lifespan of 1500 cycles (77% retention at 2 A/g) in 2 M ZnSO 4 electrolyte. Besides, the quasi-solid-state Bi 2 Te 3 /zinc battery shows excellent rate performance and high thermal stability (works well in a high temperature environment of 70 ℃). This work provides enlightenment for the development of advanced cathode materials for new generation of ZIBs with high performance, safety and stability.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Lisha Fan,Jiyong Tang,Ling Wu,Shuowen Zhang,Fan Liu,Jianhua Yao,Lianbo Guo
Bismuth telluride, (Bi 2 Te 3 ), is of great scientific and technical importance due to its excellent thermoelectric performance near room temperature. However, deposition of Bi 2 Te 3 thin films suffers from composition deviation due to preferential loss of Te at a high-temperature deposition environment. We demonstrated a fast and efficient laser annealing method to synthesize high-quality stoichiometric Bi 2 Te 3 thin films at room temperature from Te/Bi stacking films. The production rate of Bi 2 Te 3 was around 180 times higher than conventional thermal annealing. The formation of Bi 2 Te 3 thin films was studied with respect to annealing laser energy density . Bi 2 Te 3 thin films with an Bi:Te atomic ratio of 2:3 were achieved at an annealing laser energy density of 6.6 mJ/cm 2 . The structural, chemical, and thermoelectric performance of laser-annealed films were compared with conventional thermally annealed films. The Seebeck coefficient of laser-annealed films reached −167 µV/K, which was1.3 higher than that of thermally annealed films, evidencing the superiority of the laser annealing method in producing high quality Bi 2 Te 3 stochiometric films. Rapid growth of stoichiometric Bi 2 Te 3 thin films by laser annealing holds great promise for the development of high-performance thermoelectric devices.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2019
·Vol. 3
·期 12
·1900233
·
IF 0
Lin Fu,Yingjian Nie,Bo Li,Ning Li,Bingqiang Cao,Longwei Yin
To solve the thermal instability issue of organic–inorganic hybrid perovskites, all-inorganic perovskite solar cells (PSCs) have been featured in the spotlight. However, their power conversion efficiencies (PCEs) are far from satisfactory due to the substantially radiative and nonradiative recombination of charge carriers in the common-structured devices. Herein, bismuth telluride (Bi 2 Te 3 ) nanoplates are designed as an interlayer between cesium lead halide (CsPbBrI 2 ) and 2,2′,7,7′-tetrakis( N , N -di-p-methoxyphenylamine)-9,90-spirobifluorene (Spiro-OMeTAD) to reduce the notorious trap states and charge recombination. Confirmed by systematic electrochemical and photoelectrical techniques, the Bi 2 Te 3 interlayer optimizes hole extraction and transport efficiency because of the matched band level structure and drastically reduces trap defect densities. Prolonged effective lifetime and shorter diffusion time induced by the Bi 2 Te 3 interlayer reveal less electron–hole recombination and more efficient carrier transport, which lead to a larger photocurrent and less open circuit voltage loss of PSCs. The all-inorganic PSCs with the optimal Bi 2 Te 3 interlayer exhibit a highly enhanced PCE of 11.96%. Moreover, Bi 2 Te 3 also acts as a blocking layer for the migration of iodide ions, silver, and moisture, resulting in a considerable device stability of more than 70% of initial PCE after 50 days without extra encapsulation. This low-cost and facile method for efficient and stable all-inorganic PSCs offers great promise as a next-generation renewable energy source.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
ACS Nano
·
2024
·
IF 15.8
Li Wen,Qixiang Zhang,Junjie Shi,Fei Wang,Siliang Wang,Zhiwei Chen,Yang Yue,Yihua Gao
Recently, the topological insulator MnBi2Te4 has aroused great attention owing to its exotic quantum phenomena and intriguing device applications, but the superior performances of MnBi2Te4 have not been researched in the field of electrochemistry. By theoretical calculations, it is found that MnBi2Te4 exhibits excellent Zn2+ storage and transport properties. Therefore, it is speculated that MnBi2Te4 has excellent electrochemical performance in zinc-ion batteries (ZIBs). In this research, MnBi2Te4 as a pioneer has been explored in ZIBs, showing surprising electrochemical properties. The MnBi2Te4 electrode displays a high average discharge specific capacity (264.8 mA h g–1 at 0.40 A g–1), a competitive cycle life (88.6% of initial capacity after 400 cycles at 4.00 A g–1), and an excellent rate performance (average capacity retention rate of 95.1% from 0.40 to 8.00 A g–1) owing to the fast ion transport of the conductive topological surface state and dissipationless channel of the edge state. Surprisingly, the quasi-solid-state (QSS) MnBi2Te4/Zn battery delivers excellent Zn2+ storage capability and possesses a capacity retention of 79.9% after 1000 cycles at 4.00 A g–1. In addition, the QSS MnBi2Te4/Zn battery can exhibit excellent performance and the GCD curves maintain stability without distortion deformation even at temperatures of 0 and 75 °C.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Jiaao Dai,Shaojun Zhang,Fei Wang,Li Wen,Yuhao Sun,Ke Ren,Yaohua Xu,Wei Zeng,Siliang Wang
Recently, aqueous zinc ion batteries (AZIBs) with the superior theoretical capacity, high safety, low prices, and environmental protection, have emerged as a contender for advanced energy storage. However, challenges related to cathode materials, such as dissolution, instability, and structural collapse, have hindered the progress of AZIBs. Here, a novel AZIB is constructed using an oxidized 2D layered MnBi 2 Te 4 cathode for the first time. The oxidized MnBi 2 Te 4 cathode with large interlayer spacing and low energy barrier for zinc ion diffusion at 240 °C, exhibited impressive characteristics, including a high reversibility capacity of 393.1 mAh g −1 (0.4 A g −1 ), outstanding rate performance, and long cycle stability. Moreover, the corresponding aqueous button cell also exhibits excellent electrochemical performance. To demonstrate the application in practice in the realm of flexible wearable electronics, a quasi-solid-state micro ZIB (MZIB) is constructed and shows excellent flexibility and high-temperature stability (the capacity does not significantly degrade when the temperature reaches 100 °C and the bending angle exceeds 150°). This research offers effective tactics for creating high-performance cathode materials for AZIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Xin He,Rongfei Wei,Xiangling Tian,Jianrong Qiu,Mei Zhang,Qingguang Zeng,Junyan Liu
Te-Bi 2 Te 3 alloy thin film has grown on silicon dioxide substrate by thermal evaporation technique. The Bi 2 Te 3 rhombohedral structure enriched Te in the prepared thin film was identified by high solution transmission electron microscopy (HRTEM), X-Ray diffraction (XRD), Raman spectrum and X-ray photoelectron spectroscopy (XPS). Interestingly, the Te-Bi 2 Te 3 alloy thin film presents a changeover from saturable absorption (SA) to reverse saturable absorption (RSA) as continuously increasing the input intensity, which has been investigated using the open-aperture (OA) z-scan measurement under a femtosecond-pulsed laser at 800 nm. A high modulation depth of 48.3% and large saturation intensity of 24.1GW/cm 2 of the thin film were obtained. Moreover, a large nonlinear absorption coefficient β of ∼10 3 cm/GW is increased with the input intensity elevated. The research results demonstrate that the Te-Bi 2 Te 3 alloy thin film could be an emerging optical material for saturable absorber in Q-switched or mode-locking fiber lasers at low incident intensity while serve as optical limiter at high incident intensity.
研究领域:
材料科学
·
凝聚态物理
·
光学工程
·
纳米材料
·
光电子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Haowen Chen,Kaiyi Luo,Pingping Qian,Yixiao Deng,An Li,Qiang Sun,Lei Yang,Yuquan Liu,Zhengshang Wang,Guang-Kun Ren,Qian Cao,Jun Tang
The donor effect of polycrystalline n-type bismuth telluride (Bi2Te3) during sample preparation usually results in the peak thermoelectric figure of merit (ZT) at temperatures above 400 K, severely restricting its application in the room-temperature (RT) range. A leap in RT performance requires innovative strategies that replace conventional methods of regulating point defects with limited effectiveness. We demonstrate excellent thermoelectric performance with an RT figure of merit, ZT = 1.2, and a maximum ZT = 1.3 at 325 K, by regulating the high-potential barrier heterointerfaces composed of La2O3 nanoparticles (NPs) and Bi2Te2.7Se0.3 (BTS). The created energy barriers at grain boundaries scatter and localize carriers through O–Bi ionic bonding and O–Te hybridization, enhancing the density of states in adjacent regions and leading to a rapid rise in the RT Seebeck coefficient (from 148.67 μV K–1 to 222.84 μV K–1 at 300 K). Another aspect of La2O3 NPs, as the second term of nano-oxide, introduces multiscale defect-scattering phonons, thereby enhancing thermal performance. Finally, at temperature difference ΔT = 10 K, a maximum output voltage and power, Vmax = 239.73 mV and Pmax= 10.50 mW, can be achieved with the fabricated TE module. Our findings underscore the full potential for promoting the performance of thermoelectric materials in the lower temperature region via high-energy barrier interface engineering.
研究领域:
材料科学
·
热电学
·
纳米材料
·
能量转换
✓ 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）