JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2019
·Vol. 34
·期 2
·299-302
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IF 0.605
Yan Ming,Yang Lei,Li Chao,Zou Yunqi
We prepared a two-dimensional transition metal carbide Ti 2 CT x by treatment of Ti2AlC in molten fluoride salt. Two fluorinated salt systems were used to etch Al from Ti 2 AlC powder precursor under the argon atmosphere, and then the resulting MXene was delaminated with TBAOH to produce few-layered nanosheets of Ti 2 CT x . The reaction was undergone at different temperatures to study the effect of temperature. The results show that the optimal reaction temperature is 600 °C in LiF-NaF-KF system, and 850 °C in NaFKF system. The molten salt treated products are delaminated and quasi-2D MXene sheets can be obtained. The thickness of the MXene sheets prepared from the binary molten salt system is smaller than that of the ternary molten salt system.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Xiang Zhang,Xiaoning Liu,Jun Hu,Pan Zhang,Ziming Xu,Dan Wang,Weiping Xu
Hydrogels, known for their unique physical and chemical properties, hold significant potential for various applications. However, the inherent conflict between achieving both high strength and toughness often results in suboptimal mechanical performance, which significantly restricts their practical use. The shell of Discinisca tenuis is a layered natural biomaterial that exhibits high strength and toughness due to slight layer loosening during hydration, inspiring the design of tough hydrogels. Inspired by this biological process, this study developed a biomimetic layered hydrogel using a layered membrane hydration approach, optimizing the structural integrity through hot pressing to mimic the slight layer loosening observed in Discinisca tenuis shells after hydration, resulting in both high strength (55.26 MPa) and high toughness (21.04 MJ/m3). The research results indicate that slight layer loosening after hydration enables the biomimetic layered hydrogel to maintain high structural integrity, facilitating effective interlayer load transfer and achieving high strength, while also reducing spatial constraints, which improves ductility and results in high toughness. Additionally, the excellent energy dissipation capacity of the layered structure gives the hydrogel outstanding impact resistance, comparable to commercial materials like foamed polyethylene, silicone, and energy-absorbing rubber, indicating broad application prospects. In summary, this research proposes a general preparation strategy for tough hydrogels based on biomimetic principles, expected to advance the field of hydrogels.
研究领域:
材料科学
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生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Li-Jia Yao,Chun-Li Hu,Zhi Fang,Jiang-Gao Mao
Birefringent materials are very important in the laser industry. By combining the hexathiodiphosphate(IV) [P 2 S 6 ] 4- unit and the highly polarizable Hg 2+ , a mercury hexathiodiphosphate(IV) Hg 2 P 2 S 6 was designed and synthesized by using solid-state synthesis. Hg 2 P 2 S 6 crystallizes in P 1 ¯ space group. It has a layered structure as in many hexathiodiphosphates(IV) such as ZnPS 3 , CdPS 3 . Its crystal structure, electronic structure and optical properties are investigated by experimental methods and first-principle calculations. Hg 2 P 2 S 6 has a very large birefringence of 0.50 at 1064 nm and 0.48 at 2050 nm. Theoretical studies show the large birefringence comes from the synergistic effect of [P 2 S 6 ] 4- and [HgS 4 ] 6- groups with strong polarizability anisotropy.
研究领域:
材料科学
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光学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Yumei Mao,Ying Zhang,Lei Li,Jing Li,Hongmei Zeng,Guohong Zou,Zhien Lin
Two new metal phosphates , namely, Zn(HPO 4 )(mmim) (SCU-21) and 2-Hmim·In(HPO 4 ) 2 (H 2 O) 2 (SCU-22), where mmim = 1,2-dimethylimidazole and 2-Hmim = 2-methylimidazolium, are synthesized and their properties are evaluated. The SCU-21 and SCU-22 compounds have layered structures with fes and sql nets, respectively. SCU-21 shows a strong blue emission under the excitation at 365 nm. SCU-22 shows a proton conductivity of 1.56 × 10 −5 S cm −1 at 85 °C under 95% relative humidity.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Advanced Science
·
2024
·
IF 14.3
Yanghai Gui,Jintao Wu,Di Zhao,Kuan Tian,Shuaishuai Zhao,Huishi Guo,Xiaoyun Qin,Xiaomei Qin,Dongjie Guo,Yun Wang
H 2 S gas sensors with facile preparation, low detection limits, and high selectivity are crucial for environmental and human health monitoring. However, it is difficult to maintain a high response of H 2 S gas sensors under high humidity in practical applications. To face this dilemma, a layer-by-layer growth method is applied to in situ prepare a nanostructured Co(CO 3 ) 0.5 (OH)·0.11H 2 O/WO 3 coated by a hydrophobic hierarchical ZIF-67 as the H 2 S sensor. This novel composite exhibits excellent humidity immunity without sacrificing the excellent sensitivity and selectivity of H 2 S. At a low operating temperature of 90 °C, a remarkable response value of 1052.3 to 100 ppm H 2 S has been achieved, which is 779 and 9.36 times higher than that of pure WO 3 and Co(CO 3 ) 0.5 (OH)·0.11H 2 O/WO 3 , respectively. More importantly, an 82.2% relative response value remains at a high humidity of 75%RH. The sensing mechanisms are investigated using gas chromatography-mass spectrometry (GC-MS), which revealed that the reaction products are H 2 O and SO 2 . The high humidity immunity and fast response of the Co(CO 3 ) 0.5 (OH)·0.11H 2 O@ZIF-67/WO 3 demonstrate the layer-by-layer in situ synthesis method holds the potential application for the development of high-performance WO 3 -based H 2 S sensors.
研究领域:
材料科学
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环境监测
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jiajiu Li,Rongxia Huang,Congfei Peng,Yejing Dai,Shunjin Xiong,Chunhui Cai,Hua-Tay Lin
In this study, plate-like Na 0.5 Bi 0.5 TiO 3 (BNT) templates with perovskite structure were obtained by two-step molten salt synthesis (MSS) method at a low temperature. Firstly, Bi 4 Ti 3 O 12 precursors were synthesized at 1030 °C in NaCl–KCl molten salt. Secondly, plate-like Na 0.5 Bi 0.5 TiO 3 particles with perovskite structure were obtained from plate-like layer-structured ferroelectric ceramic of Bi 4 Ti 3 O 12 by topochemical microcrystal conversion method. Result showed that excessive Na 2 CO 3 was beneficial to facilitate the low temperature synthesis. In the case of an excess of 30 mol% Na 2 CO 3 , plate-like BNT particles could be obtained by synthesis at temperatures ranging from 760 °C to 800 °C, which indicated a flexible processing route. Also, it has been observed that plate-like BNT particles show a high aspect ratio with 1 μm in thickness and 10–20 μm in length. These Na 0.5 Bi 0.5 TiO 3 plate-like particles can be good candidates for the preparation of lead-free BNT-based piezoelectric ceramics with oriented grain microstructure.
研究领域:
材料科学
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Lirong Liang,Jueshuo Fan,Miaomiao Wang,Guangming Chen,Guoxing Sun
Recently, organic polymer-based thermoelectric (TE) hybrids or composites have received significant attention. Here, a unique layered morphology of polypyrrole/poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)/single-walled carbon nanotube (PPy/PEDOT:PSS/SWCNT) ternary TE composites are designed using 1D nanostruture of PPy as template. The nanowires of PPy/PEDOT:PSS binary composites are obtained via coating PEDOT:PSS on the surfaces of 1D PPy nanowires. Interestingly, the PPy/PEDOT:PSS/SWCNT ternary composites reveal unexpected layered morphology and dramatically-enhanced TE function with an optimal power factor of 45.3 ± 1.4 μW m −1 K −2 at room temperature. This study will enrich the structure design and preparation strategy of novel TE composites by judicious combing 1D polymer nanostructure with 3D layered networks of composites.
研究领域:
材料科学
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有机电子学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Nengneng Luo,Xiafeng He,Chao Xu,Zhengu Chen,Kun Zhao,Zhenyong Cen,Xiyong Chen,Dongliang Shan,Yunya Liu,Zhaobo Liu,Han Xie,Ye Zhu,Houbing Huang,Jing-Feng Li,Shujun Zhang
Dielectric capacitors possessing high power density and ultrashort discharge time are valuable for high-power energy storage applications. However, achieving high energy storage density remains challenging due to the limited breakdown strength of dielectric ceramics. In this study, inspired by the layered architecture of natural nacre and with the guidance of phase-field simulations, a strategy of constructing a nacre-like layered structure is proposed to improve the breakdown strength and energy storage density of the ceramics. This unique structure is formed by controlling the morphology and ordering of high-voltage-resistant fillers in a ceramic matrix. The (Pb 0.98 La 0.02 )(Zr 0.7 Sn 0.3 ) 0.995 O 3 -Al 2 O 3 antiferroelectric composite ceramics, containing 5vol% parallel-aligned Al 2 O 3 plates, demonstrate a remarkable enhancement in breakdown strength from 390 to 570 kV cm −1 . Of particular importance is that an ultrahigh recoverable energy storage density of up to 13.2 J cm −3 is achieved, representing a 50% enhancement compared to the pure ceramic (8.7 J cm −3 ). The parallel-aligned Al 2 O 3 plates are strongly bound together with the ceramic matrix, effectively blocking charge migration and controlling the breakdown path, thus greatly enhancing the voltage endurance of the composite ceramics. This work provides an innovative approach to designing high-performance composite ceramics for next-generation energy storage applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Qian Wang,Meiling Ge,Yuheng Dou,Fu Yang,Junkai Wang,Yuyang Shao,Agen Huang
Polymer supports play an important role in noble metal loaded catalysts. In this study, palladium clusters stabilized by several polyamides have been widely studied in the oxidation of benzyl alcohol under airflow. The different kinds of polyamides (PADs) were synthesized with aromatic diamines and trimesoyl chloride by mechanical grinding method and solvent-heat method. Polyamide support was synthesized through mechanical grinding method. And the laminar structure and abundant amide bonds of polyamide can help obtain ultrafine Pd clusters with a mean particle size of 1.76 nm. The Pd 0.5 @PAD-2-M effectively catalyzed benzyl alcohol into benzaldehyde with a conversion of 96.1 % and turnover number (TON) of 1441 under 90 °C in water which was 2.5 times higher than the commercial Pd/C catalyst. High TON value of 6505 was also achieved in solvent-free system. This work reveals the advantages of laminar structure of polyamide in dispersing Pd clusters and promoting benzyl alcohol conversion. Besides, the carrier properties of amphipathy and substrate adsorption were also investigated to illustrate the significance of interfacial effect for laminar catalyst in heterogeneous catalysis.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
·
2021
·
IF 2.077
Ling Zhang,Xinyang Jin,Yuedan Xu,Chaoyang Wang,Mingxing Li,Baiping Fu
This study investigated effects of polyacrylic acid (PAA) on nanolayering self-assembly, and effects of salt ions on the formation of nanolayering after their chemical interaction with 10-methacryloyloxydecyl dihydrogen phosphate (MDP). ACP–MDP suspension was prepared by dispersing 0.01 g ACP nanoparticles in 4 mL of a 5 wt% MDP solution. Then a PAA solution (100 or 500 μg/mL) was mixed into ACP–MDP suspension. The reaction products were analyzed by transmission electron microscope (TEM). After one of the following metal chlorides (each 0.076 mM of CaCl2, BaCl2, AlCl3, FeCl2, FeCl3, MnCl2, CuCl2, ZnCl2, or MgCl2) was dispersed in a 4 mL MDP solution, they were further analyzed by X-ray diffraction (XRD) and TEM. ACP nanoparticles in the MDP solution could self-assemble into ACP–MDP nanolayering composites. The TEM images show that an amount of ACP nanoparticles were aggregated and fused together after the addition of PAA into ACP–MDP suspensions, while no nanolayering was found. The XRD data and TEM images reveal that nanolayering was self-assembled after the chemical interaction of MDP with some metal chlorides (CaCl2, BaCl2, AlCl3, FeCl2, FeCl3, MnCl2), but not with the others (ZnCl2, CuCl2, MgCl2). PAA could inhibit the self-assembly of nanolayering. Some salt ions play an important role in highly ordered, self-assembled nanostructure after their chemical interaction with MDP. The finding is helpful for functional materials fabrication.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2017
·Vol. 123
·期 6
·1-4
·
IF 1.455
Wen Xiaoyu,Pan Xiaona,Wu Libin,Li Ruinan,Wang Dan,Zhang Jinqiu,Yang Peixia
Lamellar tin deposits were prepared by galvanostatical electroplating from the aqueous acidic-sulfate bath, with gelatin and benzalacetone dissolved in ethanol (A BA+EtOH ) as additive, and their morphologies were investigated by scanning electron microscopy. Cathodic polarization curves revealed that the absorbability of A BA+EtOH on the cathode surface was higher than that of gelatin. X-ray diffraction analysis indicated preferred orientations of tin growth led to the formation of lamellar structure and distortion of tin lattice. The growth mechanism of lamellar tin was also discussed.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Lin-Lin Zhang,Huan-Huan Li,Yan-Hong Shi,Chao-Ying Fan,Xing-Long Wu,Hai-Feng Wang,Hai-Zhu Sun,Jing-Ping Zhang
In this paper, gelatin as a natural biomass was selected to successfully prepare an oxygen-enriched carbon with layered sedimentary rocks structure, which exhibited ultrahigh-rate performance and excellent cycling stability as supercapacitors. The specific capacitance reached 272.6 F g–1 at 1 A g–1 and still retained 197.0 F g–1 even at 100 A g–1 (with high capacitance retention of 72.3%). The outstanding electrochemical performance resulted from the special layered structure with large surface area (827.8 m2 g–1) and high content of oxygen (16.215 wt %), which effectively realized the synergistic effects of the electrical double-layer capacitance and pseudocapacitance. Moreover, it delivered an energy density of 25.3 Wh kg–1 even with a high power density of 34.7 kW kg–1 and ultralong cycling stability (with no capacitance decay even over 10 000 cycles at 2 A g–1) in a symmetric supercapacitor, which are highly desirable for their practical application in energy storage devices and conversion.
研究领域:
材料科学
·
能源存储
✓ 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）