ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zhe Li,Zeyang Li,Hao Lu,Boyu Song,Xiya Zhao,Hanyang Zhou,Lei Wang,Qingli Zou,Yusen Yang,Min Wei
Tin oxide is widely recognized as a promising candidate for the electrochemical synthesis of formate from CO2. However, challenges such as suboptimal performance and a limited understanding of the reaction mechanisms persist. In this study, we developed an integrated electrode by optimizing a hierarchical metal–metal oxide nanoarray via a combination of hydrothermal synthesis and electrodeposition. This design enables direct growth of the catalyst on the current collector, eliminating the need for polymer binders. The constructed metal–loading structure effectively regulates the electronic structure of Sn and facilitates the formation of Snδ+ species, which thereby enhances the adsorption strength of *OCHO intermediate, significantly enhancing formate production. The resulting electrocatalyst, Bi–Sn(In)O, demonstrates a Faradaic efficiency (FE) of 83.66% for the reduction of CO2 to formate, with a maximum production rate of 768.12 μmol·h–1·cm–2 and a current density of 54.45 mA·cm–2. In situ infrared characterization and theoretical calculations reveal that local charge redistribution and the presence of high-valence Snδ+ improve the adsorption and stabilization of the crucial *OCHO intermediate, thereby lowering the energy barrier for HCOOH formation. Additionally, the integrated electrode design enables the exposure of more active sites, substantially increasing the electrochemical surface area and catalytic activity. This study offers valuable insights into the catalyst design for high-valence Snδ+ in CO2 reduction.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wei Xiang,Lijun Jia,Tingqing Cai,Xuening Han,Mingchao Yang,Huaiwu Zhang
To meet high-power microwave system demands, low-temperature sintered Bi-Li-V substituted YIG ferrites were prepared. The experimental results reveal that Bi 3+ , Li + , and V 5+ occupy the c, a, and d sites of the garnet structure, respectively; the full-site distortion reduces the lattice activation energy, significantly reducing the transformation temperature from perovskite to garnet phase. Additionally, a dual structure with a high percentage of fine grains is observed in the substituted samples, which is an important reason for the large increase in spin-wave linewidth. Isothermal thermodynamic analysis indicates that a sintering mechanism dominated by liquid-phase sintering is conducive to the densification of YIG ferrites. Ferromagnetic resonance linewidth decomposition confirms that, due to the simultaneous increase in the saturation magnetization and the magneto-crystalline anisotropy constant, anisotropy-induced linewidth remains almost unchanged; the dense dual structure leads to a significant reduction in porosity-induced linewidth; ultimately, the ferromagnetic resonance linewidth is greatly reduced.
研究领域:
材料科学
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电子工程
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Materials Today Bio
·
2025
·
IF 10.2
Shuang Bian,Yangang Zhu,Nanxin Zhao,Yanchen Wang,Zhimou Yang,Jingjing Li
Atherosclerosis (AS) is characterized by lipid overaccumulation and progressive chronic inflammation. Macrophages over-accumulate at plaque sites and promote fibrous cap instability and plaque rupture by participating in lipoprotein uptake and metabolism, inflammatory factor secretion, and the production of enzymes and toxic metabolites. The macrophages accumulating at plaque sites are mainly derived from circulating blood-derived monocytes. Therefore, we designed a peptide 2P with an alkaline phosphatase (ALP) induced self-assembly function and P-selectin targeting function to form a supramolecular bi-antibodies 2P@VLA-4 by coassembling with VLA-4, a CD106 affinity. The dephosphorylation site and efficiency were optimized. 2P@VLA-4 displayed enhanced protein stability and binding ability to inflamed vascular endothelial cells. Through the dual-targeted blocking effect on the adhesion binding site of monocytes, 2P@VLA-4 could significantly reduce the accumulation of monocytes/macrophages at the plaque site, thereby inhibiting the progression of AS. At the same time, modification of peptides with fluorescent molecules enabled specific imaging of plaques. This study focused on the ease of design and functionalization of peptides, to synthesize supramolecular bi-antibodies compound innovatively by enzyme instructed self-assembly (EISA), achieving the significant inhibition of the adhesion and aggregation of monocytes at plaque sites. Coupling with its specific imaging capability, it may provide new approaches for the integrated design of diagnosis and treatment of AS .
研究领域:
医学
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生物化学
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纳米医学
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Materials
·
2025
·Vol. 18
·期 9
·2149
·
IF 3.2
Qingmeng Wang,Xiuli Wang,Xiaomin Cheng,Qianju Cheng,Yi Yang
In the fields of nuclear engineering and solar thermal utilization, low melting point alloys with excellent thermal conductivity and heat transfer performance have attracted extensive research as a new generation of heat transfer fluids, leading to many fundamental and important application issues. This study investigates the high-temperature corrosion behavior of Sn-50Bi-2Zn (wt.%) heat transfer alloy against 304 stainless steel (304), 310S heat-resistant steel (310S), and 20 carbon steel (20C) at 600 °C. Theoretical analysis, based on Fick’s diffusion law, and experimental measurements reveal significant differences in corrosion severity. After 473 h, 20 carbon steel exhibited the lowest corrosion layer thickness (0.07 mm), while 310S suffered the most severe corrosion (1.50 mm), exceeding 304SS (0.83 mm) by 81%. Diffusion coefficients derived from Sn penetration depths further quantified these trends: D310S = 2.51 × 10−7mm2/s (6.8 × higher than 304: 3.7 × 10−8mm2/s) and D20C = 2.87 × 10−10mm2/s (128 × lower than 304SS). XRF analysis confirmed the dissolution of steel components into the molten alloy, with Fe, Cr, and Ni content increasing to 0.382 wt.%, 0.417 wt.%, and 0.694 wt.%, respectively, after 480 h. These results underscore the critical role of Ni content in accelerating Sn/Zn diffusion and pore formation, providing actionable insights for material selection in high-temperature heat transfer systems.
研究领域:
材料科学
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核工程
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热能工程
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Advanced Science
·
2025
·
IF 14.1
Bozhi Yang,Xin Min,Xinyu Zhu,Shaorou Ke,Shujie Yang,Ya Chen,Wei Wang,Ruiyu Mi,Yangai Liu,Zhaohui Huang,Xi Kai,Minghao Fang,R. Vasant Kumar
Bismuth is a promising anode material for potassium-ion batteries due to its green, non-toxic and high theoretical capacity (384 mAh g −1 ). However, the sluggish reaction kinetics and excessive volume expansion during cycling limit its practical application. Herein, Bi-induced few-layered graphite frameworks are in situ encapsulated on the surface of Bi nanoparticles, based on the mechanism of graphitization by rearrangement of interstitial carbon atoms during the nucleation process of Bi, while these composite particles are embedded in Bi-doped porous carbon fibers composite. The graphite frameworks can stabilize the structure while serving as an efficient interfacial transfer layer, enabling rapid transport of both potassium ions and electrons. Bi atoms doped into the carbon fiber matrix effectively enhances the potassium ion transport kinetics in amorphous carbon by lowering the migration energy barrier of potassium ions in the carbon layer. The porous structure effectively alleviates the volume expansion of Bi nanoparticles during cycling, which synergistically results in superior high-rate performance and cycling stability. Finally, the capacity can reach 215 mAh g −1 at 10 A g −1 , and a capacity retention rate of 83.8% is achieved after 6000 cycles at 10 A g −1 with an ultra-low decay rate of 0.00278% per cycle.
研究领域:
材料科学
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电化学
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Tuan Lin,Hexin Chen,Shuxing Li,Le Wang,Fan Huang,Rong-Jun Xie
Laser-driven white lighting sources promise super-high brightness, good directionality and high efficiency, but are usually suffering from low color rendering index (Ra), high correlated color temperature (CCT) and poor light uniformity. To solve these problems, we designed bi-color phosphor-in-glass (PiG) films containing broadband green and red phosphors, and introduced Al 2 O 3 particles as scattering centers into the PiG films. The addition of Al 2 O 3 effectively increases the Ra value from 83 to 93, and greatly improves the angular uniformity in Ra and CCT with C v (Ra) decreasing from 14.96% to 0.16% and C v (CCT) decreasing from 45.87% to 1.5%. The coefficient of variation (C v ) is used to evaluate the light uniformity, and the smaller the value, the better the uniformity. The color temperatures can be tuned in a wide range of 2500 ∼ 6300 K by controlling the content of Al 2 O 3 or the ratios of phosphor-to-glass in the films as well as their thicknesses, while high Ra values of > 90 are maintained. A prototype laser-driven white light with excellent color qualities (Ra = 95, Rf = 95, Rg = 104, R9 = 99, R15 = 98) and a high luminous efficacy of 102 lm/W was demonstrated for stage spotlights by optimizing the composition and structure of the bi-color PiG films. This work highlights the roles of secondary phase in heat dissipation and light scattering, and provides ideas to design PiG color converter films for use in super-high color quality laser lighting.
研究领域:
光学材料
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光源技术
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COMPOSITES SCIENCE AND TECHNOLOGY
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2020
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IF 7.094
Taoqing Huang,Yongwei Li,Min Chen,Limin Wu
Hexagonal boron nitride (h-BN), as a high thermal conductive filler , has been widely used to construct thermal transport network in polymers. However, anisotropic thermal property of BN and its conventional thermal conductive network usually lead to high thermal conductivity in one direction that limits the overall heat dissipation effect. Herein, we report a novel radially aligned three-dimensional boron nitride nanosheets/epoxy composite for thermal interface materials via radial freeze-casting method. The as-prepared composite with radially aligned boron nitride nanosheets lamellae exhibits bidirectional high thermal conductivity , with 4.02 W m −1 K −1 in the through-plane direction and 3.87 W m −1 K −1 in the in-plane direction even at low BNNS loading (e.g., 15 vol%), respectively. Besides, excellent electronic insulation property and shape stability can also meet the requirements of isotropic TIM in thermal management.
研究领域:
材料科学
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热管理技术
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MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2021
·Vol. 223
·期 8
·2100338
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IF 2.527
Chao Qu,Hongzhang Zhang,Changsheng Wang,Xianfeng Li
A membrane with low vanadium ion permeability and excellent electrochemical stability is crucial for a vanadium flow battery (VFB). Herein, a highly stable anion exchange membrane based on a bi-guanidinium crosslinking quaternized poly(arylene ether sulfone) (PSF) is reported. The positively charged guanidinium groups can not only form continuous and smooth ion transport channels but also prevent the mutual penetration of vanadium electrolyte at positive and negative sides, respectively, based on the Donnan exclusion effect. Moreover, the crosslinking structure endows the membrane high mechanical strength to meet the requirements of the harsh environment of VFBs. As a result, the anion exchange membrane fabricated by the poly(arylene ether sulfone) crosslinked with bi-guanidinium (BG-PSF) shows an impressive VFB performance with a coulombic efficiency of 99.8% and an energy efficiency of above 85.8% at a current density of 80 mA cm −2 , which is much higher than that of Nafion115. Furthermore, this battery can continuously work for over 200 cycles at a current density of 80 mA cm −2 , indicating good stability of the membrane. Therefore, the rationally designed BG-PSFs are promising for VFB applications.
研究领域:
材料科学
·
能源技术
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Meifei Lian,Binbin Sun,Zhiguang Qiao,Kai Zhao,Xiaojun Zhou,Qianqian Zhang,Duohong Zou,Chuanglong He,Xiuyin Zhang
Guided bone regeneration (GBR) membranes have the potential to prevent the invasion of epithelial and connective tissues as well as to maintain a stable space for facilitating the ingrowth of regenerative bone tissue. However, the bioactivity and regeneration potential of currently available membranes still need to be improved. In this study, a novel bi-layered membrane with both osteogenic and antibacterial functions was developed for GBR applications. The loose layer (LL) of the membrane was composed of conjugated electrospun poly (lactic-co-glycolic acid) (PLGA)/gelatin nanofibers incorporating dexamethasone-loaded mesoporous silica nanoparticles ( [email protected] ), while the dense layer (DL) of the membrane consisted of traditionally electrospun PLGA nanofibers loaded with the broad-spectrum antibiotic doxycycline hyclate (DCH). Morphological results showed that the LL ( [email protected] /PLGA/Gel) membrane exhibited a porous and loosely packed structure, which was beneficial for cell adhesion and infiltration, while the DL (DCH/PLGA) membrane remained dense enough to act as a barrier. In vitro drug release tests indicated that both DEX and DCH followed a favorable sustained release profile. The cell viability evaluation suggested that the electrospun membranes possessed good cytocompatibility. Furthermore, in vitro osteogenesis analyses demonstrated that the [email protected] /PLGA/Gel composite membrane possessed an enhanced osteoinductive capacity for rat bone marrow stem cells (BMSCs), which was verified by the increased alkaline phosphatase (ALP) activity, the enhanced calcium deposition, and the upregulated osteocalcin (OCN) expression. In vitro antimicrobial experiments revealed the effective antibacterial potency of the DCH/PLGA membrane. In conclusion, the prepared nanocarrier-incorporated bi-layered composite membrane with combined osteogenic and antibacterial properties may be a promising candidate for GBR application.
研究领域:
生物材料
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组织工程
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再生医学
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药学
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材料科学
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2021
·Vol. 127
·期 2
·79
·
IF 2.584
Xue Lisha,Shen Weixia,Zhang Zhuangfei,Fang Chao,Zhang Yuewen,Jia Xiaopeng
Motivated by prototypes that the heavy-element doping can effectively tune carrier and phonon transport behavior, we studied the influence of Bi doping on the thermoelectric properties of Cu 2 Se synthesized by high-pressure and high-temperature technique. With the increased Bi contents, the carrier mobility of Bi x Cu 2 Se samples distinctly decreased, while the Seebeck coefficient and electrical resistivity increased. The Bi x Cu 2 Se samples exhibited multiple microstructures including abundant grain boundaries, micropores and lattice defects. Various phonon scattering mechanisms generated relatively low lattice thermal conductivity below 0.55 Wm −1 K −1 for all Cu 2 Se-based samples. The lattice thermal conductivity of Cu 2 Se-based samples increased after Bi doping due to reduced degree of disorder of Cu + ions, which weakened phonon scattering. Due to the significantly reduced thermal conductivity, a peak zT value of 1.57 at 873 K was obtained for Bi 0.005 Cu 2 Se sample, which was 25% higher than that of pristine Cu 2 Se (zT ~ 1.25). This work indicates the potential of heavy-element doping in boosting performance for liquid-like thermoelectrics.
研究领域:
材料科学
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热电材料
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高压合成
·
固体物理
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ruiheng Li,Wenxin Ou,Jianglong Zhu,Qian Deng,Xiaobo Tan,Qi Zhao,Tianbo Lu,Shaojingya Gao,Huangshui Ma,Hao Wu,Qiang Sun,Ran Ang
The emerging fields of the Internet of Things, intelligent robotics, and smart biomedical devices have sparked an increasing demand for high-performance thermoelectric (TE) devices due to their efficient conversion of thermal energy into electrical power, and vice versa. The environmentally friendly (Bi, Sb) 2 Te 3 (BST) system, which displays superior performance near room temperature, offers a promising solution for optimizing thermoelectrics to meet the needs of commercial applications. Here, we utilized AgInSe 2 alloying to enhance the TE and mechanical properties of BST, aiming to optimize electron and phonon transport and elucidate the underlying mechanisms. The synergistic optimization resulted in a peak zT of ∼ 1.3 at 353 K and an average zT ave of ∼ 1.11 from 303 K to 503 K in BST-0.1 %AgInSe 2 , as well as a high Vickers hardness of ∼ 105 H v. Through rational optimization of the TE device, we achieved a maximum conversion efficiency of ∼ 6 % at a temperature difference of 210 K. Leveraging the robust TE output of the device, we further evaluated its potential as a self-powered information interaction wristband device based on ASCII codes. We envisage this versatile TE device being extensively applied in power generation and human–machine interaction, with promising potential in wearable electronics, telecommunications, and healthcare monitoring.
研究领域:
材料科学
·
热电学
·
能量转换
·
可穿戴技术
·
力学性能
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高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Wenquan Sun,Biao Ma,Yongjun Sun,Huaili Zheng,Genchao Ma
In this work, the degradation of tetracycline (TC) in wastewater was investigated using the γ-Al 2 O 3 – Bi–(Sn/Sb) particle electrodes. Parameters affecting the degradation efficiency and energy consumption of the γ-Al 2 O 3 –Bi–(Sn/Sb) particle electrodes, such as electrical conductivity, initial pH, air flow, current intensity, plate distance, filling ratio, and initial wastewater concentration, were systematically investigated. Results showed that the optimal conditions were 4000 mS·cm - 1 conductivity, pH 6, 15 mL·min - 1 air flow, 0.1 A current intensity, 4 cm plate distance, 0.05 g·mL - 1 filling ratio, and 100 mg·L -1 wastewater concentration. More than 90% and 70% of TC and total organic carbon were degraded, respectively, under the optimal conditions. In addition, the γ-Al 2 O 3 –Bi–(Sn/Sb) particle electrodes had good stability and reproducibility.
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