Materials
·
2025
·Vol. 18
·期 4
·744
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IF 3.2
Ya-Long Wang,Guo-Hua Zhang
Submicron-sized TiB2powders (300 nm–1 μm) were prepared by the reaction of TiC, B4C, and Ca assisted by molten CaCl2. The optimal reaction procedure (1200 °C and 25 wt.% CaCl2+ 25 wt.% Ca) was obtained by exploring the effects of the boronization reaction temperature and the addition of an amount of CaCl2. It was found that the introduction of CaCl2not only promoted the reaction but also effectively inhibited the volatilization of excess Ca. Furthermore, SEM images of the products showed that the morphology and particle size of TiB2were inherited from the carbothermal reduction product TiC, which was dominated by the “template/growth” mechanism. The process of the boronization reaction was that B atoms migrated from B4C and replaced the C atoms in the lattice of TiC.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 8
·3542
·
IF 4.6
Qing Liu,Chao Yan,Yan Wang
Applications of submicron-scale particles are of rising interest in separation science due to their favorable surface-to-volume ratio and their fabrication of highly ordered structures. The uniformly dense packing beds in columns assembled from nanoparticles combined with an electroosmotic flow-driven system has great potential in a highly efficient separation system. Here, we packed capillary columns using a gravity method with synthesized nanoscale C18-SiO2particles having diameters of 300–900 nm. The separation of small molecules and proteins was evaluated in the packed columns on a pressurized capillary electrochromatography platform. The run-to-run reproducibility regarding retention time and peak area for the PAHs using a column packed with 300 nm C18-SiO2particles were less than 1.61% and 3.17%, respectively. Our study exhibited a systematic separation analysis of small molecules and proteins based on the columns packed with submicron particles combined with the pressurized capillary electrochromatography (pCEC) platform. This study may provide a promising analytical approach with extraordinary column efficiency, resolution, and speed for the separation of complex samples.Keywords:submicron scale particles;pressurized capillary electrochromatography;separation
研究领域:
分析化学
·
分离科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Chao Wang,Qikun Wang,Kun Liu,Jianlei Liu,Yongqing Wang,Yulong Yang,Qibing Chang
High-performance submicron ZrSiO 4 powder is prepared by a sol-gel-microemulsion-hydrothermal method (S-G-M-H). In this method, the transformation from sol to gel is constrained in the droplets of the microemulsion and accelerated by the hydrothermal process. The interface change of sol/oil to gel/oil makes the emulsion automatic demulsificate without demulsifiers, which means that the organic solvents can be recycled. The preparation process is low-cost and environmentally friendly. The results show that the synthesized ZrSiO 4 powder owns the optimized median diameter (D50) of 0.67 μm under the optimized preparation condition of hydrothermal treatment at 150 °C for 7 h. The ZrSiO 4 particles are the agglomeration of the primary particles with a size of about 100 nm. As an opacifier , 15 wt% submicron ZrSiO 4 powder added give a whiteness value of 85 to the opaque glaze, which is significantly better than commercial ZrSiO 4 powder with the same amount added. Meanwhile, the obtained submicron powder has excellent sintering activity. After sintered at 1300 °C for 2 h, the ZrSiO 4 pellets has the density of 4.32 g cm −3 and the porosity of 0.31%.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED POWDER TECHNOLOGY
·
2020
·
IF 4.217
Mingyi Zhang,Zenan Lin,Qingming Huang,Yadong Zhu,Hui Hu,Xiaohui Chen
In this research, a novel green mechanochemical dry gel conversion method (MDGC) is reported to obtain submicron-sized Ti-rich MWW zeolite. First, titanium and silica sources were milled under milder conditions in a planetary ball mill to construct the uniform SiO 2 -TiO 2 composite powders with higher Ti contents. Subsequently, submicron-sized Ti-rich MWW zeolite powder was prepared via dry gel conversion (DGC) route using the obtained composite under mixed steam environment consisting of water and piperidine. The physicochemical properties of the SiO 2 -TiO 2 composites before and after calcination and corresponding Ti-MWW-MDGC were investigated by XRD, UV–Vis, FT-IR, SEM, XRF, and N 2 absorption-desorption. Moreover, Ti-MWW (30)-MDGC exhibited a superior catalytic activity during epoxidation with H 2 O 2 compared with the traditional DGC method, and the conversion of 1-hexene increased from 4.2% to 26.3%. The MDGC method is a promising approach for the green production of various zeolites with higher heteroatom contents, such as TS-1, Ti-Beta and Sn-MWW, etc.
研究领域:
材料科学
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无机化学
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催化化学
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纳米材料
·
绿色化学
✓ 已验证
DOI
高影响因子
International Journal of Bioprinting
·
2022
·
IF 7.422
Shugang Hu,Zijie Meng,Junpeng Zhou,Yongwei Li,Yanwen Su,Qi Lei,Mao Mao,Xiaoli Qu,Jiankang He,Wei Wang
Micro/sub-microscale fibrillar architectures of extracellular matrix play important roles in regulating cellular behaviors such as attachment, migration, and differentiation. However, the interactions between cells and organized micro/sub-microscale fibers have not been fully clarified yet. Here, the responses of MC3T3-E1 cells to electrohydrodynamic (EHD) printed scaffolds with microscale and/or sub-microscale fibrillar architectures were investigated to demonstrate their potential for bone tissue regeneration. Fibrillar scaffolds were EHD-fabricated with microscale (20.51 ± 1.70 μm) and/or sub-microscale (0.58 ± 0.51 μm) fibers in a controlled manner. The in vitro results showed that cells exhibited a 1.25-fold increase in initial attached cell number and 1.17-fold increase in vinculin expression on scaffolds with micro/sub-microscale fibers than that on scaffolds with pure microscale fibers. After 14 days of culture, the cells expressed 1.23 folds increase in collagen type I (COL-I) deposition compared with that on scaffolds with pure microscale fibers. These findings indicated that the EHD printed sub-microscale fibrous architectures can facilitate attachment and COL I secretion of MC3T3-E1 cells, which may provide a new insight to the design and fabrication of fibrous scaffolds for bone tissue engineering.
研究领域:
生物医学工程
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组织工程
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 38
·17851-17859
·
IF 6.97
Ning Tang,Shichao Zhang,Yang Si,Jianyong Yu,Bin Ding
Developing a porous membrane to effectively remove sub-micron sized contaminants from water while maintaining a high permeate flux with energy-saving properties is of great significance but extremely challenging. Herein, we describe a feasible strategy to create a bacterial cellulose (BC) membrane with a continuous Voronoi-net structure via combining evaporation-induced self-assembly with chemical cross-linking. This presented approach allows micro-length BC nanofibers to self-assemble in the electrospun polyacrylonitrile (PAN) nanofibrous frameworks to form stable and continuous Voronoi-like nanonets, endowing the obtained membrane with small pore size, stable pore structure, high porosity, favourable interconnectivity, and ultrathin membrane thickness. By virtue of these unique structural advantages and superhydrophilicity from BC Voronoi-like nanonets, the resulting membrane exhibits integrated performances of high rejection efficiency (>99.63%) for 0.3 μm TiO2 microparticles, robust permeate flux (5541 L m−2 h−1) at a low driving pressure of 20 kPa, intriguing reusability, excellent bacterial rejection efficiency (log reduction value of 8.2), and promising antifouling function to bacteria. It is expected that the proposed strategy can provide a facile approach for the development of next-generation high performance microfiltration membranes.
研究领域:
材料科学
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环境工程
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膜技术
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水处理
✓ 已验证
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 37
·19953-19962
·
IF 14.511
Songjie Li,Jiazhe Gao,Yinjun Ou,Wenze Wang,Qian Zhang,Shangfu Gao,Xuehua Liu,Chunfu Lin
The solid-state reaction method for energy-storage material preparations is simple and cost effective, thereby being suitable for industrialization. However, its sintering temperatures are generally high, resulting in large-sized (>1 μm) primary particles with low electrochemical activity. Here, based on a Mo4Nb26O77 model material, we explore a general modification of the solid-state reaction method through using sintering aids with redox activity and successfully prepare Mo4Nb26O77 with submicron-sized (∼200 nm) primary particles at a low sintering temperature of only 700 °C. The resultant high electrochemical activity of Mo4Nb26O77 and its additional Mo-based redox activity which originated from the MoO3 sintering aid enable its large practical capacity of 366 mA h g−1, which is the largest in the field of niobate anode materials. Mo4Nb26O77 further exhibits a relatively low working potential since more Nb4+ ions are reduced to Nb3+ ions at low potentials. Additionally, Mo4Nb26O77 has high rate performance and good cyclability when external Li+ ions mainly occupy the interstices between the (010) crystallographic planes of its open and stable shear ReO3 crystal structure. Good low-temperature electrochemical properties are also achieved as a result of the high electrochemical activity. Therefore, this anode material has great practicability for high-performance Li+ storage.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）