JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Mao Deng,Zhangyi Huang,Wanying Guo,Yang Shi,Junjing Duan,Jianqi Qi,Haomin Wang
Short-range order is a new strengthening effect that can significantly affect the mechanical properties of high-entropy materials. Furthermore, simulation results show that this strengthening effect at a quasi-atomic scale can suppress the grain size softening, leading to the disappearance of inverse Hall-Petch behavior in nanocrystalline high-entropy materials. In this work, the evident inverse Hall-Petch behavior is confirmed in the translucent nanocrystalline high-entropy ceramic (HEC) with an average grain size below 10 nm, fabricated by a high-pressure low-temperature sintering technique. Besides, the as-obtained nanocrystalline HEC also shows an improving fracture toughness compared with the corresponding coarse-crystalline HEC.
研究领域:
材料科学
·
力学
✓ 已验证
DOI
高影响因子
GEOCHIMICA ET COSMOCHIMICA ACTA
·
2016
·
IF 4.315
Huan Li,Shuijin Hu,Matthew L. Polizzotto,Xiaoli Chang,Qirong Shen,Wei Ran,Guanghui Yu
Highly reactive nano-scale minerals, e.g., short-range-ordered minerals (SROs) and other nanoparticles , play an important role in soil carbon (C) retention. Yet, the mechanisms that govern biomineralization from bulk minerals to highly reactive nano-scale minerals remain largely unexplored, which critically hinders our efforts toward managing nano-scale minerals for soil C retention. Here we report the results from a study that explores structural changes during Aspergillus fumigatus Z5 transformation of montmorillonite and goethite to SROs. We examined the morphology and structure of nano-scale minerals, using high-resolution transmission electron microscopy , time-resolved solid-state 27 Al and 29 Si NMR, and Fe K-edge X-ray absorption fine structure spectroscopy combined with two dimensional correlation spectroscopy (2D COS) analysis. Our results showed that after a 48-h cultivation of montmorillonite and goethite with Z5, new biogenic intracellular and extracellular reactive nano-scale minerals with a size of 3–5 nm became abundant. Analysis of 2D COS further suggested that montmorillonite and goethite were the precursors of the dominant biogenic nano-scale minerals. Carbon 1s near edge X-ray absorption fine structure (NEXAFS) spectra and their deconvolution results demonstrated that during fungus Z5 growth, carboxylic C (288.4–289.1 eV) was the dominant organic group, accounting for approximately 34% and 59% in the medium and aggregates, respectively. This result suggested that high percentage of the production of organic acids during the growth of Z5 was the driving factor for structural changes during biomineralization. This is, to the best of our knowledge, the first report of the structural characterization of nano-scale minerals by 2D COS, highlighting its potential to elucidate biomineralization pathways and thus identify the precursors of nano-scale minerals.
研究领域:
土壤学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2018
·Vol. 20
·期 40
·6319-6327
·
IF 3.304
Yu Shen,Zongzhuang Han,Hang Li,Haichao Li,Gang Wang,Fumin Wang,Xubin Zhang
Hierarchical ZSM-5 zeolite with short-range ordered mesoporosity and hierarchical ZSM-5 zeolite nanorods were obtained via a direct hydrothermal synthesis by the cooperative structure direction of dimethyloctadecyl[3-(trimethoxysilyl)propyl]- ammonium chloride (TPOAC) and tetrapropylammonium hydroxide (TPAOH). Dimethyloctadecyl[3-(dimethoxymethylsilyl)propyl]ammonium chloride (DPOAC) and octadecyltrimethylammonium chloride (OTAC) were also employed as structure directing agents (SDA) to further explore the role of methoxysilyl groups in organosilanes during the formation of hierarchical structure. The prepared materials were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), N2 adsorption–desorption, FT-IR, UV-vis and inductively coupled plasma-optical emission spectroscopy (ICP-OES). The characterization results showed that the use of TPOAC and DPOAC would generate short-range ordered mesopores and irregular mesopores, respectively. Hierarchical ZSM-5 zeolite nanorods with worm-like intracrystalline mesopores could be obtained by adjusting the amount of silicon source. The lack of methoxysilyl groups in OTAC however could lead to phase separation problems. Furthermore, the hierarchical Fe-ZSM-5 zeolite with short-range ordered mesoporosity showed enhanced catalytic activity and stability for the hydroxylation of phenol at room temperature.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
Small
·
2025
·
IF 12.1
Chenyang Wang,Tiantian Guo,Ruizhi Tang,Shujuan Ma,Yinmao Wei,Yangyang Bian,Junjie Ou
The development of monodisperse hybrid silica microspheres with highly regular pore structure and uniform distribution of functional groups have significant value in the biomolecular separation field. In this work, the short range ordered pore channels are precisely constructed onto the non-porous silica microsphere surface by a bi-phase assembly method, and the cylindrical silica channel introduced a plethora of vinyl groups by “one-pot” co-condensation to form vinyl hybrid silica shell. As hydrophilic interaction chromatography (HILIC) stationary phase, the vinyl hybrid core–shell silica microsphere is simply modified with zwitterion glutathione (SiO 2 @SiO 2 -GSH), in which the HILIC enrichment process is significantly shortened due to its specific porous characteristics. Most importantly, SiO 2 @SiO 2 -GSH microsphere can enrich 2186 N-glycopeptides from the rat liver protein digest within 2 min, which mapped to 806 glycoproteins. Compared with HILIC enrichment result within 1 h, the glycoproteins and glycopeptides overlap are 88.3% and 79.1%, performing excellent reproducibility. The short range ordered channels onto the silica microsphere surface exhibit excellent mass transfer efficiency, so the developed bi-phase assembly method is expected to design more advanced hybrid silica materials for other urgently fields.
研究领域:
生物分子分离
·
材料科学
·
色谱分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Yang Zhao,Xinru Gong,Rui Dai,Shuangfeng Fang,Baihang Cai,Fei Wang,Yufeng Yan,Puyuan Liu,Yi Luo,Junheng Fu,Yong Wang,Liang Qiao,Minglei Yan
The efficient purification of Cu 2+ -contaminated wastewater poses a formidable challenge. Capacitive deionization (CDI) technology, which operates on the principle of electrochemical capacitance, has emerged as a promising candidate for serving as a key technology to address this problem. In this work, chitosan is employed as a carbon precursor for the fabrication of a CDI carbon electrode (CoZn-C). This electrode features a high specific surface area and short-range ordered carbon domains, which are achieved through the strategic utilization of basic carbonate templates to induce site-occupying effects, coupled with the synergistic catalysis of metal. Importantly, benefiting from sufficient electrochemical adsorption active sites and the carbon structural channels that facilitate rapid Cu 2+ transport, the constructed symmetric CoZn-C//CoZn-C CDI device demonstrates excellent purification capability for Cu 2+ . The adsorption capacity and removal efficiency of the CDI electrode for Cu 2+ are as high as 124.3 mg g −1 and 94.5%, respectively (at 1.2 V, 50 mg L −1 ). The electrochemical capture of Cu 2+ by CoZn-C CDI electrodes is achieved through the coupling effect of the electrical double layer and electro-reduction deposition. Accordingly, the carbon domain regulation method offers a new strategy for designing and constructing high-efficiency CDI carbon electrodes for the heavy metal ion wastewater purification.
研究领域:
环境科学
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材料科学
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电化学
·
水处理技术
·
纳米材料
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能源与环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Pengfei Guo,Zhongyan Zhang,Ru Feng,Fei Peng,Xingyu Luo,Xiaofeng Xu,Xiaoling Lang,Yaqing Cen,Meiqin Shi
The durability of platinum-group metal catalysts for oxygen reduction reaction (ORR) remains a critical determinant for the commercial viability of proton exchange membrane fuel cells (PEMFCs). Herein, we report a PtCu catalyst featured with a short-range ordered crystal structure and stabilized by a nitrogen-doped carbon shell. Notably, triphenylphosphine was strategically employed as a coordinating agent to regulate the uniformly growth of Pt and Cu complex. The N-doped carbon shell derived from zeolitic imidazolate framework-8 ( ZIF-8) served a dual protective function: (1) physically isolating PtCu nanoparticles to mitigate agglomeration during thermal annealing, and (2) electrochemically stabilizing the catalyst against dissolution under accelerated durability test. X-ray absorption fine structure (XAFS), supported by density functional theory (DFT) calculations revealed that the short-range ordered structure in the PtCu kinetically impeded both Pt leaching and Cu segregation, which is beneficial for improving catalyst stability. Durability tests demonstrates only 15 % mass activity loss after 50 K electrochemical cycles, underscoring the efficacy of Pt-Cu interface design in addressing durability challenges for PEMFC cathodes.
研究领域:
催化
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材料科学
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电化学
·
纳米技术
·
燃料电池
✓ 已验证
产品关联
DOI
高影响因子
Materials Today
·
2023
·
IF 24.2
Yiyuan Yang,Zhe Jia,Xinyue Zhang,Yujing Liu,Qianqian Wang,Yongjie Li,Liliang Shao,Siyi Di,Juan Kuang,Ligang Sun,Lai-Chang Zhang,Jamie J. Kruzic,Yang Lu,Jian Lu,Baolong Shen
The superior electrocatalytic activity of multi-principal element alloys (MPEAs) is typically attributed to synergistic effects of their multi components in random solid solutions. Strategies to control the functional atoms with a chemically ordered atomic distribution and the specific atomic configuration in the MPEAs remain a challenging research topic. Here, we have discovered non-random, chemical short-range order (CSRO) in a Fe 10 Co 5 Ni 10 Cu 15 Al 60 MPEA induced by magnetic characteristics of elements, leading to ultralow overpotential for dual-electrode water splitting in alkaline condition. Atomic-resolution imaging and elemental mapping assisted by statistical analysis and density functional theory (DFT) simulations revealed that CSRO in the MPEA originated from the nearest-neighbor preference of M-Cu (M = Fe, Co, Ni, and Al) pairs and repulsion of same-element pairs (Fe-Fe, Co-Co, Ni-Ni, Cu-Cu, and Al-Al). Such preferential atomic pairs facilitated H 2 O/H* adsorption/desorption during the hydrogen evolution reaction and reduced the energy barrier for the rate-determining step of the oxygen evolution reaction , thereby promoting excellent overall water splitting performance. The achieved current density (130 mA cm −2 ) of the low-cost MPEA was ∼4 times higher than that of the Pt/C||RuO 2 dual-electrode system (32 mA cm −2 ) at a cell voltage of 2.0 V. The concept of CSRO in MPEAs offers new insights into their multi-functional applications, potentially spurring the development of numerous high-performance MPEA-based devices for the energy and environmental sectors.
研究领域:
材料科学
·
电化学
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 26
·2503496
·
IF 26.8
Kaiqi Zhang,Yuling Huang,Shuang Liu,Qihong Xiong,Sikang Zheng,Bin Zhang,Guiwen Wang,Yu Pan,Guang Han,Guoyu Wang,Xu Lu,Xihan Chen,Xiaoyuan Zhou
Thermoelectric materials, like other electronic materials, require high carrier mobility, which is governed by carrier scattering potential. In addition to intrinsic acoustic phonon scattering, the extrinsic factors such as microstructure and atomic arrangement also have great influence on carrier transport in solids, e.g., the emerging thermoelectric material AgSbSe 2 with strong cation disorder. However, the experimental evaluation of total carrier scattering potential and distinguishing the contributions from intrinsic and extrinsic scatterings is challenging at present. Here, the time-resolved ultrafast spectroscopy analysis utilizing a pump-probe scheme is performed to characterize the charge carrier dynamics of AgSbSe 2 with femtosecond time resolution quantitatively. A significantly lowered total carrier scattering potential energy in Cd-doped AgSbSe 2 crystal is determined, resulting from the elimination of grain boundaries and the presence of short-range order that leads to a negative extrinsic scattering potential. The reduction in carrier scattering potential leads to a threefold increase in the average power factor from 323 to 723 K. A maximum thermoelectric figure of merit of 1.7 is achieved in high-quality AgSb 0.973 Cd 0.017 Se 2 crystal at 723 K, with the output efficiency of the single-leg thermoelectric device reaching a competitive value of 8%. This work reveals how to effectively characterize and modulate carrier scattering potential in thermoelectric compounds.
研究领域:
材料科学
·
热电学
·
凝聚态物理
·
超快光谱学
·
固体物理
✓ 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）