ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xinxin Li,Wenjing Qin,Yanli Wang,Yan Zhang,Zhenhao Tian,Wei Li,Xiao Li,Shougen Yin
Efficient energy acquisition and energy-saving measures are important to meet climate change commitments and address energy crises. However, combining high energy density, low preparation energy consumption, and low temperature management energy consumption remains a major challenge. We mitigate this challenge by fabricating a recyclable fiber film via the coelectrospinning of tantalum pentoxide/thermoplastic polyurethane (Ta2O5/TPU) to integrate passive daytime radiative cooling technology into the triboelectric nanogenerator (TENG) system. Due to the high dielectric constant of Ta2O5 and special bead chain structure of the fiber film, the integrated TENG-based radiative cooling textile offers an excellent TENG output (current density ∼77 mA m–2) and passive daytime radiative cooling capability (cooling temperature ∼25 °C), as well as the ability to withstand at least 10 renewable cycles. Moreover, the composite material exhibits waterproof and wear-resistant properties. As a proof of concept, the potential applications of Ta2O5/TPU fiber films in smart car clothing for energy harvesting, cooling, shading, and scratch collision warning were demonstrated. This study contributes to the development of textiles for electricity generation and zero-energy input cooling.
研究领域:
材料科学
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能源技术
·
纺织工程
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DOI
高影响因子
Small
·
2023
·Vol. 20
·期 14
·2306666
·
IF 13.3
Wuqi Liu,Wang Fu,Yaju Wei,Guoqiang Yu,Tao Wang,Lingbo Xu,Xiaoping Wu,Ping Lin,Xuegong Yu,Can Cui,Peng Wang
Carrier-selective passivating contacts using transition metal oxides (TMOs) have attracted great attention for crystalline silicon (c-Si) heterojunction solar cells recently. Among them, tantalum oxide (Ta 2 O 5 ) exhibits outstanding advantages, such as a wide bandgap, good surface passivation, and a small conduction band offset with c-Si, which is typically used as an electron-selective contact layer. Interestingly, it is first demonstrated that solution-processed Ta 2 O 5 films exhibit a high hole selectivity, which blocks electrons and promotes hole transport simultaneously. Through the ozone pre-treatment of Ta 2 O 5 /p-Si interface and optimization of the film thickness (≈9 nm), the interfacial recombination is suppressed and the contact resistivity is reduced from 178.0 to 29.3 mΩ cm 2 . Moreover, the Sn 4+ doping increases both the work function and oxygen vacancies of the film, contributing to the improved hole-selective contact performance. As a result, the photoelectric conversion efficiencies of Ta 2 O 5 /p-Si heterojunction solar cells are significantly improved from 14.84% to 18.47%, with a high thermal stability up to 300 °C. The work has provided a feasible strategy to explore new features of TMOs for carrier-selective contact applications, that is, bipolar carrier transport properties.
研究领域:
材料科学
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光伏技术
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半导体器件
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表面物理
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纳米材料
·
能源材料
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Wanwan Wu,Linjie Song,Yinqi Qiao,Yan Bai,Xue Liu,Haiyan Li,Dongbin Dang
Developing efficient photocatalysts for the conversion of CO 2 into value-added chemicals is considered as an ideal strategy to handle the energy crisis and environmental pollution. Among the numerous candidate materials, lead-free perovskite Cs 3 Bi 2 Br 9 has attracted significant research interests in CO 2 photoreduction because of its excellent reducing power and controllable product selectivity. In this work, we developed a novel Cs 3 Bi 2 Br 9 /Ta 2 O 5 composite via the in-situ growth of Cs 3 Bi 2 Br 9 on the porous Ta 2 O 5 , which exhibits excellent dual functionalities of CO 2 capture and conversion. The optimized sample T2 achieved a CO photoreduction yield of 413.45 μmol g −1 h −1 without adding any sacrificial agents, which is 4.7 and 22.3 times higher than that of pure Cs 3 Bi 2 Br 9 and Ta 2 O 5 , respectively. The markedly improved photocatalytic performance arises from a type-II heterojunction charge transfer pathway generated between Cs 3 Bi 2 Br 9 and Ta 2 O 5 , which drives the highly efficient separation and transfer of charge carriers, as confirmed by the enhanced photocurrent response and quenched PL intensity. Furthermore, the achieved composite also exhibited remarkable stability, as evidenced by the well-maintained structural integrity of the material after a 24-hour cycling test. This study provides key insights for developing novel lead-free perovskite-based photocatalysts, which has significant scientific and application value for achieving carbon neutrality goals.
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ELECTROCHIMICA ACTA
·
2026
·
IF 5.6
Zhiming Li,Wei Li,Ning Li,Bo Wu,Yueping Xiong,Qing Cheng,Qi zhao,Jinhui Wu,Deyu Li
In copper electroplating systems, the mechanisms by which organic additives shorten the service life of dimensional stable anodes (DSAs) remain unclear, hindering rational anode and additive design. Here, we investigated the effects of three representative additives—brightener (SPS), suppressor (PEG), and leveler (Collagen)—on IrO₂–Ta₂O₅ DSAs using accelerated lifetime tests, XPS, and DFT calculations. The experimental results showed that all additives reduced electrode durability, with collagen showing the most pronounced effect, shortening lifetime by over 40%. Adsorption of additives increased OER overpotential and accelerated Ir dissolution, leading to decreased electrochemically active surface area and activity. DFT and XPS revealed that collagen and similar N-containing levelers strongly adsorb on IrO₂(110), consistent with their high degradation effect, whereas SPS had minimal impact. Similar adsorption trends were observed on RuO₂(110) and SnO₂(110), suggesting broader relevance. These results clarify additive-induced degradation mechanisms and provide guidance for mitigating durability loss, including optimizing additive concentration and improving oxide coating design.
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高影响因子
TALANTA
·
2017
·
IF 4.162
Zhengkun Xie,Wang Lu,Lingxi Yang,Gaiping Li,Baoxian Ye
Baicalein and baicalin are the major flavonoids found in Scutellariae Radix, an essential herb which has had a presence in traditional Chinese medicine (TCMs) for more than two thousands of years. Owing to their similar characteristics and physiochemical properties, sensitive, it is a great challenge to detect both of them simultaneously. In this work, a novel, facile and sensitive electrochemical method was proposed based on tantalum oxide (Ta 2 O 5 ), niobium oxide (Nb 2 O 5 ) particles and antiseptic chitosan modified carbon paste electrode (Ta 2 O 5 -Nb 2 O 5 @CTS-CPE). Scanning electron microscope (SEM), X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV) and electrochemical impedance spectrum (EIS) were used to characterize the properties and investigate the electrochemical response of the sensor. The electrochemical behaviors and redox mechanisms of two analytes were investigated at the target electrode. Under the optimum conditions, the highly sensitive and simultaneous determination of baicalein and baicalin was successfully achieved with a linear response range of 0.08–8.0 μM for both of them. The obtained detection limits for baicalein and baicalin were of 0.05 and 0.03 μM (S/N=3), respectively. Furthermore, the proposed sensor displayed high sensitivity, excellent stability and satisfactory results in Scutellariae Radix samples analysis and hydrolysis process analysis of baicalin in vivo .
研究领域:
分析化学
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电化学
·
传统中药
·
药物分析
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2023
·
IF 7.4
Haijian Qin,Zelong Yang,Qing Xia,PeifeiYao,Chunzhi Zheng,Guangpin Lin,Zhaolian Ye,Songjian Zhao,Fengli Yang
Because the combination of Co and common support (Al, Ti, et al.) usually shows poor catalytic activity, tantalum has been introduced for CO conversion as a novel carrier due to the excellent performance. In this work, Co 3 O 4 was loaded on four forms of tantalum support (amorphous, mesoporous, crystalline and crystalline mesoporous, abbreviated as Co/Ta-am, Co/Ta-me, Co/Ta-cry and Co/Ta-cm, respectively). And among these four states, Co/Ta-cm presents the highest CO conversion rate. The temperature of 90% CO conversion rate of Co/Ta-cm is approximately 130 ℃ at the high space velocity of 780,000 h −1 , which is 70%, 82% and 88% higher than that of Co/Ta-cry, Co/Ta-me and Co/Ta-am, respectively. Moreover, the characteristics of the catalyst have been studied by XRD, SEM, BET, TGA, and H 2 -TPR, and the results reveal that Co/Ta-cm has the excellent crystallinity and stability, and the morphology is regular. X-ray photon spectroscopy and in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTs) have been performed to investigate the reaction mechanism, which indicates that Co 3+ is the active component and lattice oxygen plays a critical role in CO oxidation.
研究领域:
催化化学
·
材料科学
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Jian Li,Xiaohan Zhang,Jia Liu,Qingxuan Zhou,Haitao Wu,Yuanyuan Zhou,Yang Wang,Wei Sun,Yanxiang Jiang,Yongning Han,Zhuoqun Han,Zhicheng Zhao,Futian Liu,Walther Glaubitt,Yongcui Zhang,Yingying Wang,Ling Li
(1- x )MgAl 2 O 4 - x MgTa 2 O 6 composite ceramics based on the MgO-Al 2 O 3 -Ta 2 O 5 pseudoternary phase diagram were prepared by the solid-state reaction. MgAl 2 O 4 and MgTa 2 O 6 could coexist due to their different crystal structures. MgAl 2 O 4 inhibited the rapid growth of MgTa 2 O 6 grains, and dense microstructures ( ρ > 95%) with a uniform grain size distribution was obtained, with an optimal densification temperature of 1550 - 1575 °C. The temperature coefficient of resonant frequency ( τ f ) and quality factor ( Q × f ) were optimized by introducing MgTa 2 O 6 phases with low dielectric loss and positive τ f . In addition, the partial solid solutions of Al 3+ into Ta 5+ sites resulted in loosening bonds within [Al/TaO 6 ] octahedra and abnormally large polarizabilities, which was confirmed by the decrease in V Ta-O and the redshift of A 1 g (Ta-O) mode. Consequently, the relative permittivity ( ε r ) and τ f values o f MgAl 2 O 4 -MgTa 2 O 6 composite ceramics were further enhanced, exceeding the predicted ones. The 0.6MgAl 2 O 4 -0.4MgTa 2 O 6 composition sintered at 1550 °C achieved excellent performance, with a near-zero τ f value of 3.3 ± 1.7 ppm/°C, a low ε r of 16.4 ± 0.3 and an ultra-high Q × f of 179,000 ± 6700 GHz @ 8.94 ± 0.04 GHz. These findings hold promising applications in the field of 5 G/6 G high-frequency communication.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 21
·4712-4719
·
IF 6.569
Tianxing Wu,Hanqi Meng,Rui Dang
Electrocatalytic hydrogenation is a competing reaction for hydrogen evolution that occurs in the presence of organic compounds containing unsaturated chemical bonds using water as the hydrogen donor. Here, we propose a simple method to synthesize amorphous Ta2O5 loaded amorphous Ru with poor crystallinity. The amorphous composite (Ta2O5/Ru-4.0-400) with an ultra-low Ru loading amount (2.16 wt%) exhibits 69.8% conversion of cinnamaldehyde with 29.1% FE and 100% selective formation of half-hydrogenated hydrocinnamaldehyde under a constant potential of −1.1 V vs. RHE for 5 h. Detailed experimental studies revealed that the amorphous structure with poor crystallinity offers structural flexibility and rich defects for electrochemical hydrogenation reactions, and the Ta2O5 substrate serves as a bridge to effectively facilitate electron transfer from Ru to CAL molecules. This work presents a new strategy for designing highly efficient electrocatalysts with an amorphous structure for the hydrogenation of organic compounds containing unsaturated chemical bonds.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuhan Fan,Yongze Cao,Zhihua Zhang,Hualong Tao,Meiling Li,Xizhen Zhang,Sai Xu,Baojiu Chen
By using the molten salt synthesis with B 2 O 3 flux and adjusting the doping concentration of Y 3+ , the intergrowth of the YTa 7 O 19 phase in L-Ta 2 O 5 is achieved. This structure enhances the pure green upconversion luminescence (UCL) intensity, which is because the YTa 7 O 19 phase isolates the distribution of Er 3+ /Yb 3+ in the 2D layer, localizing the energy transfer from Yb 3+ to Er 3+ and reducing the loss during the energy transfer process. By adjusting the concentration of Er 3+ /Yb 3+ and the holding temperature, the green UCL integral intensity of the optimal sample is 1.09 times that of β-NaYF 4 :Er 3+ /Yb 3+ . The intergrowth of the YTa 7 O 19 phase in L-Ta 2 O 5 is demonstrated by high-resolution transmission electron microscopy (HRTEM) and comparing bandgap values, and the structure and properties cannot be obtained by solid phase sintering. Using the luminescence intensity ratio (LIR) technology, the absolute temperature sensitivity (S A ) and relative temperature sensitivity (S R ) were 0.01359 K −1 and 0.01001 K −1 , respectively. The phosphor-converted 980 nm LEDs based on samples are fabricated, the CIE color coordinate can reach (0.20, 0.76), which exceeds NTSC standard. This indicates that this material can be used for temperature sensing and luminescence display applications.
研究领域:
材料科学
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光学材料
·
固体物理
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纳米技术
·
无机化学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2018
·Vol. 44
·期 12
·14811-14816
·
IF 3.057
Yudong Sui,Lina Han,Yehua Jiang
In this study, the effect of Ta 2 O 5 addition on the phase evolution and mechanical properties of sintered (1600 °C, 4 h) TiO 2 -added yttria-stabilized zirconia-toughened alumina (ZTA) ceramic composites was investigated. The scanning electron microscopy and X-ray diffraction results revealed the formation of a new tantalum zirconium oxide, TaZr 2.75 O 8 , with a block-like morphology at Ta 2 O 5 contents higher than 1 wt%. The grain sizes of both the Al 2 O 3 and yttria-stabilized zirconia phases first increased and then decreased with an increase in the Ta 2 O 5 content. The relative density, Vickers hardness , and fracture toughness of the composites were found to be strongly dependent on their grain sizes, relative densities, and the formation of the TaZr 2.75 O 8 secondary phases. The composite with 3 wt% Ta 2 O 5 showed the highest relative density (99.3%), Vickers hardness (1932 HV), and fracture toughness (8.21 MPa m 1/2 ).
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高影响因子
ELECTROANALYSIS
·
2016
·Vol. 29
·期 3
·835-842
·
IF 2.471
Zhengkun Xie,Yongmei Wu,Sheng Kai,Gaiping Li,Baoxian Ye
A novel electrochemically activated doped Ta 2 O 5 particles modified carbon paste electrode (EA-Ta 2 O 5 -CPE) was prepared and applied for selective and sensitive determination of chrysin. X-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) techniques and cyclic voltammetry (CV) were used to characterize the Ta 2 O 5 particles and investigate the electrochemical response of the sensor. Compared with bare CPE, the doped Ta 2 O 5 modified electrode got much more porous by electrochemical treatment and exhibited larger effective surface area, more reactive site and excellent electrochemical catalytic activity toward the oxidation of chrysin. Under optimum conditions by LSV, the oxidation peak currents responded to chrysin linearly over a concentration range from 5.0×10 −8 to 7.0×10 −6 mol L −1 with a detection limit of 2.0×10 −8 mol L −1 (5.08 ng mL −1 ). The fabricated sensor showed anti-interference ability against the biological common interferents (i.e. baicalein, baicalin) and provided to be reliable for the determination of chrysin in Chinese medicinal herb Oroxylum indicum and chrysin capsules samples with satisfactory results.
研究领域:
分析化学
·
药物分析
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DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Aml E. Shrshr,Baoji Miao,Mohamed M. Elsenety,Muhammad Shahid Nadeem,Muhammad Asad,Irshad Ahmad Mir,Liaqat Rasheed,Ahmed Zaki Alhakemy,Muhammad Yasir,Jinbo Bai,Jianmin Zhang,Mohammed A. Al-Tahan
The advancement of lithium-sulfur (Li-S) batteries could be enhanced by effective catalysts that limit the shuttling of polysulfides (LiPSs) and promote their transformation. Here, a unique one-step hydrothermal approach is used to produce tantalum pentoxide nanoparticles wrapped in reduced graphene oxide (Ta 2 O 5 @rGO nanohybrid) and operate as an effective functional separator for Li-S batteries. The Lewis acid-base chemical interactions between sulfur species and Ta atoms achieve strong Ta-S and Li-O bonds, providing Ta 2 O 5 catalytic properties in Li-S cells. The adsorption energy data, calculated by Density Functional Theory (DFT), indicate that Ta 2 O 5 @rGO has robust adsorption capacity for all lithium polysulfides, exhibiting enhanced stability for larger polysulfides (Li 2 S 6 and Li 2 S 8 ). Moreover, rGO-induced oxygen defects in Ta 2 O 5 could accelerate interfacial electron transport and LiPSs entrapment, diffusion, and transformation. By enhancing the Li-S cell's capacity to 485 mAh g −1 after 700 cycles at 1.0C, the functional separator of Ta 2 O 5 @rGO-PP verifies its low-capacity degradation per cycle and excellent long-cyclic performance. Despite difficult circumstances like a sulfur loading of 4.5 mg cm −2 and an electrolyte/sulfur (E/S) ratio of 6.0 μL mg −1 , Ta 2 O 5 @rGO-PP still managed to show a high capacity of 736 mAh g −1 after 100 cycles.
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高影响因子
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