CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Ying Wan,Ren Wang,Wei Feng,Zhengxing Chen,Tao Wang
In this study, high internal phase Pickering emulsions (HIPPEs) stabilized by protein-polysaccharide complexes were used as inks for food-grade three-dimensional printing (3DP). The complexes (RCs) structured by synergistic interactions between rice proteins (RPs) and carboxymethyl cellulose (CMC) displayed outstanding biphasic wettability with excellent ability to reduce the oil/water interfacial tension. The interfacial structures formed by RCs provided a steric barrier and sufficient electrostatic repulsion, preventing droplet coalescence against heating treatment as well as long-term storage. Moreover, the rheological behaviors of the HIPPEs can be tuned by the substitution degree (DS) of CMC for tailorable hydrophobic/hydrophilic properties of RCs, allowing their controllable injectability and printability during 3DP. The HIPPEs stabilized by RCs with a DS 1.2 showed the most favorable printing resolution, hardness, adhesiveness, and chewiness . Associating the hydrophobic RPs with hydrophilic CMC, our study enabled on-demand amphiphilicity of RCs for effective stabilization of HIPPEs that can be manipulated for 3DP.
研究领域:
食品科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yuan Xiao,Rong Gu,Tingting Zheng,Bowen Chang,Qiaoxia Li,Shuaiqi Gong,Xin Wei,Qunjie Xu,Yulin Min
A fundamental challenge in the advancement of advanced battery materials is the need to achieve a balance between electrode structural integrity and interfacial charge transfer kinetics via the modification of the electrode interface. In this study, we propose an interfacial reconstruction of LiNi 0.6 Co 0.1 Mn 0.3 O 2 (NCM 613) by wet coating Nb 2 O 5 and high-temperature annealing treatment, and successfully doped the electrode surface with the construction of Nb 5+ and LiNbO 3 fast ion channels. Combined with in-situ analysis and density functional theory (DFT) calculations to provide a comprehensive understanding of the electrochemical behavioural relationships between Li, O and Nb, the resulting structure accelerates the charge transfer kinetics at the electrode interface, resulting in fast Li + migration and high ionic conductivity. Furthermore, the doping of the surface with Nb 5+ also serves to mitigate the occurrence of lattice distortion and the release of lattice oxygen from the electrode during Li + insertion/extraction. Consequently, the modified NCM 613 displays high Li-ion conductivity (15.11 S m −1 ), prolonged cycle stability at high voltages (4.5 V, 175.40 mAh g −1 ), and the assembled Li||NCM 613 pouch cell (0.5 Ah) demonstrated a capacity retention of 75.16 % after 100 cycles of cycling at 0.5 C. This in situ surface modification strategy offers a viable approach for the development of advanced cathode materials with practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2021
·
IF 3.627
Wanzhe Tong,Dong Fang,Chongxi Bao,Songlin Tan,Yichun Liu,Fengxian Li,Xin You,Jingmei Tao,Rui Bao,Caiju Li,Jianhong Yi
Silica/Cu composites generally fail to achieve the high strength due to the weak interfacial bonding between SiO 2 and Cu. In the current work, the first use of silica quantum dots (SiO 2 QDs) as a copper-based composite reinforcement. Silicon quantum dots (Si QDs) and copper acetate are employed as raw materials for spray pyrolysis to obtain an interconnected structure of SiO 2 QDs/Cu 2 O, which achieve well-dispersion of the reinforcement and good interface combination in one step. The SiO 2 QDs/Cu 2 O composite block is obtained by ball milling, hydrogen reduction, and SPS sintering. Micro interface structure and strengthening mechanism of the composites are investigated and presented in detail. Microstructural analysis discovers the Cu 2 O transition layer between SiO 2 QDs and Cu matrix and well-dispersed SiO 2 QDs in the Cu matrix. The good bonding of grain interface can significantly enhance the mechanical properties . The 1.2 wt% SiO 2 QDs/Cu composite block exhibits an excellent ultimate tensile strength of 456.63 MPa, which is 101.68% higher than that of unreinforced Cu (227.39 MPa). Furthermore, the composite block maintains the high conductivity (83.27% IACS) and elongation (8.86%). Moreover, this work can promote the development of Cu matrix composites using ceramic reinforcement with an improved interface bonding.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Cheng Zhong,Yongzhao Hou,Wen Yang,Nannan Zhu,Dong Wang,Guangwu Wen,Anying Wang,Lijuan Zhang
Novel intermetallic compound M x Si modified SiCO ceramic microspheres (SiCOM-ms) were successfully fabricated via the ceramic precursor emulsion method. These SiCOM-ms, with grain size ranging from 3 to 8 µm, had similar “chocolate ball” shape with numerous irregular protrusion on the surface. By adjusting the magnetic components in the precursor, different intermetallic compound M x Si phases were uniformly embedded in the SiCO ceramic matrix and further effectively promoted the formation of the SiC phase and graphited carbon phase. The complex interface structure in SiCOM-ms was derived from the in-situ generated M x Si, SiC, and graphited carbon nanocrystalline , which produced an enhanced interfacial polarization for electromagnetic wave absorption. It is worth mentioning that the SiCOM microspheres exhibit excellent electromagnetic wave absorption with the minimum reflection loss (RL min ) below − 60 dB, especially in the low frequency (2–8 GHz). Moreover, the RL min of SiCOCo-ms could reach − 70.6 dB with the thickness of 4 mm, while the effective absorption bandwidth (EAB, RL<−10 dB) could reach 5.2 GHz at the thickness of 2.5 mm. As for the absorption mechanism, the impendence matching, multiple scattering, interfacial polarization and magnetic loss were all taken into consideration. This work is confident that the novel SiCOM-ms with outstanding electromagnetic performance can be considered ideal materials for electromagnetic absorbing field.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2022
·Vol. 14
·期 24
·e202201010
·
IF 5.497
Yanping Hu,Jing Zhou,Xuzhuo Sun,Jing Chen,Bo Li,Yujia Wang,Ning Wang
Graphical Electrocatalytic water-splitting : A facile reduction-hydrolysis strategy was developed to fabricate a Ru−RuO 2 hybrid on various substrates (Ni foam, graphene and CNT) as bifunctional electrocatalysts for water-splitting. Engineering bifunctional nanocomposites with pronounced interfacial structure represents an effective design strategy for water-splitting catalysts. Herein, a facile reduction-hydrolysis method is described for the fabrication of Ru−RuO 2 hybrid nanocomposites on various substrates [Ni foam (NF), carbon nanotubes (CNT) and graphene oxide (GO)] as overall water-splitting catalysts. Polydopamine (PDA) is the key element for simultaneously fabricating the Ru−RuO 2 hybrids as a moderate reductant by controlling the reduction rate. In the synthesis process, a gradual reduction of Ru 3+ to Ru 0 in the presence of PDA occurred during the hydrolytic process of Ru 3+ to form RuO 2 ⋅ n (H 2 O). After calcination, Ru−RuO 2 hybrids with tight interfacial contacts and high electrical conductivity exhibited excellent performance for both HER and OER. Especially, Ru−RuO 2 hybrids on the NF (Ru−RuO 2 /NC/NF) achieved outstanding catalytic activity toward HER and OER with overpotential of 24 mV and 223 mV at a current density 10 mA cm −2 in alkaline solution, respectively. This work provides a new method for facile synthesis and engineering of Ru−RuO 2 nanoparticles on various substrates for boosting the HER/OER performance.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Le Fu,Bohan Wang,Wei Xia
We have previously observed that doping of Ca ions was beneficial to the formation of zircon (ZrSiO 4 ). It is well known that synthetic ZrSiO 4 is typically formed via a solid-state reaction between ZrO 2 and SiO 2 , in which the interfaces between the reactant and resultant play an important role. However, the interfaces are lacking detailed microstructural observation. This follow-up study aims at exploring the formation mechanism of ZrSiO 4 by inspecting the interfaces at the nano and atomic scales with TEM techniques. Results demonstrated that ZrSiO 4 was formed in the Ca-doped sample after sintering at 1200 °C, whereas, no ZrSiO 4 was formed in the undoped sample even after sintering at 1230 °C. The Ca-doped sample consisted of a continuous ZrSiO 4 matrix with dispersed ZrO 2 nanocrystallites . Doping of Ca ions promoted the formation of ZrSiO 4 by causing lattice distortion and oxygen vacancies in ZrO 2 lattices. Thin amorphous grain boundary complexions were found between ZrO 2 nanocrystallites and between ZrO 2 and ZrSiO 4 crystallites . These amorphous complexions acted as reaction sites and an intermediate metastable state for the solid-state reaction. A detailed formation mechanism of ZrSiO 4 at the nanometer scale and atomic scale has been proposed.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 40
·19161-19167
·
IF 3.925
Peng Miao,Weixing Chen,Kailei Li,Weifeng Zhao,Jie Kong
Design of microwave absorbents with hierarchical interfacial structures has become an effective method to scatter microwaves. Metal/carbon composites derived from metal–organic frameworks (MOFs) have attracted considerable attention due to their tunable chemical composition and microstructure. We describe the facile synthesis of a Co/CoO/FeO/C nanocomplex employing Co(OH)2 on NH2-MIL-88B as the “sacrificial template” through one-step pyrolysis. The as-prepared flaky-like Co/CoO/FeO/C nanocomplex showed an effective absorption width of 4.7 GHz at 1.86 mm and a minimum reflection loss of −45.5 dB at 2.01 mm. Our study can aid design of a microstructural strategy for preparing high-performance microwave absorbents.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Jianzhong Ma,Chenyang Liu,Yuehong Zhang,Yufei Dong,Chao Liu,Zhonglei Ma
A variety of nano SiO 2 microspheres with negative charge or positive charge were prepared by hydrochloric acid treatment or/and γ-mercaptopropyltrimethoxysilane modification respectively. The obtained modified SiO 2 with different content of -OH or -SH and different charges were physically introduced into water-borne polyurethane (WPU) dispersion to fabricate the WPU/modified SiO 2 nanocomposites with interfacial interaction of hydrogen bond and electrostatic interaction . The influence of interfacial interaction (hydrogen bond and electrostatic interaction) between WPU and modified SiO 2 on the interface structure and mechanical properties of the WPU/modified SiO 2 nanocomposites were investigated. The results showed that when both hydrogen bond and electrostatic interaction were present between WPU and modified SiO 2 , the microstructure and the tensile strength of the WPU/modified SiO 2 nanocomposite were mainly affected by the electrostatic interaction, while the elongation at break was mainly affected by the hydrogen bond interaction. Overall, a methodology of the combination of molecular dynamics simulation and experiment study was established to reveal the influence of surface characteristic of SiO 2 on the interface interaction and mechanical properties of the WPU/modified SiO 2 nanocomposites.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Haijun Pan,Fa Luo,Zhaowen Ren,Yuchang Qing,Chun-Hai Wang,Qiang Chen
Interface structure of ceramic matrix composite is crucial for flexural strength, fracture toughness, electromagnetic wave (EMW) absorbing properties, and oxidation resistance. This work prepared the multi-layer C-SiC interfaces in SiC f /mullite composites via a precursor infiltration-pyrolysis process (PIP) combining ball-milling dispersion. The effects of the interface thickness on the flexural strength, toughness, and EMW absorbing performance were investigated. The result shows that the SiC f /mullite with a thickness ( t ) of 0.32 μm C-SiC interface exhibits excellent flexural strength (154.66 MPa) and strong absorbing performance with a broad effective absorption bandwidth (EAB, RL ≤ -10 dB) covering the whole X-band. The composite with a 1.35 μm C-SiC interface significantly improves up to 32.01 MPa m 1/2 in fracture toughness. The oxidation behaviors of SiC f /C-SiC/mullite under 1000 °C were also investigated by analyzing the cross-section morphology and fracture models. The C-SiC interface isolated the SiO 2 generated on the fiber from the Al 2 O 3 in the matrix. The flexural strength retention rate of the oxidized composite is 82 % when the thickness of C-SiC interface is 0.32 μm.
研究领域:
材料科学
·
电磁学
·
陶瓷材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Xiaowen Zhong,Jianglin Liu,Bowen Liu,Xiaofei Wang,Xuliang Lin
The development of productive and durable non-precious metal catalysts for the sluggish oxygen evolution reaction (OER) is critical for water splitting. Herein, a novel NiSe-FeO x heterojunction encapsulated in lignin-derived carbon layer (NiSe-FeO x @LC) was synthesized via hydrothermal self-assembly and in-situ pyrolysis . NiSe-FeO x @LC exhibited excellent OER performance with an overpotential of 265 mV at 50 mA·cm −2 , a Tafel slope of 83 mV·dec −1 , as well as long-term stability. Both experimental and DFT calculation results indicated that the doping of FeO x into NiSe@LC successfully optimized the dual interface structure between NiSe and FeO x , thereby promoted the d-bands orbital hybridization, that facilitated electron transfer . Besides, the carbon coating effectively protected the NiSe-FeO x components from leaching and agglomerating during the reaction. This study provides insight into the significance of lignin-derived carbon-encapsulated metallic catalyst for electrocatalytic OER process.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2019
·Vol. 21
·期 12
·1895-1902
·
IF 3.382
Bojia Xu,Baobao Cao
Wrapping SnO2 nanowires with appropriate oxide shell materials could produce a significant impact on their photoelectrical and gas sensing performance. In this work, a novel highly crystalline SnO2/Zn2SnO4 core–shell nanowire has been fabricated using a sequential chemical vapor deposition (CVD) method. Cross-sectional transmission electron microscopy (TEM) reveals that the SnO2 core is surrounded by five or six Zn2SnO4 domains, displaying a characteristic quasi-hexagonal cross section. Extensive crystallographic orientation study shows that the growth direction of the core is along the SnO2 [101] direction, parallel to that of the shell Zn2SnO4 [101], i.e. SnO2 [101]∥Zn2SnO4 [101]. While the Zn2SnO4 outer shells have two crystallographic relationships between the SnO2 core, SnO2 (10)∥Zn2SnO4 (13) and SnO2 (020)∥Zn2SnO4 (1), one group of the domains sticks to the SnO2 {111} plane and the other group grows on the SnO2 {020} plane. All the Zn2SnO4 shell domains expose their {111} plane as the ending surface. The tetragonal SnO2 core growing along the [101] direction makes it nearly invisible when collecting electron diffraction from the side view of the core–shell nanowire. The geometrical model deduced from cross-sectional TEM results suggests that there is only one low index zone axis for the core nanowire, i.e. SnO2 [010], along which Moiré fringes and the very rarely seen multiple double-diffraction effect were observed and discussed in detail. We would like to call the attention of researchers to be careful in correlating the microstructure of core–shell nanowires with their physical properties, because merely observing from the radial direction might not be able to reveal the true interface structure.
研究领域:
材料科学
·
纳米技术
·
晶体学
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2022
·Vol. 14
·期 10
·e202200001
·
IF 5.497
Helong Sun,Lufa Hu,Zhangyang Li,Junyu Lang,Chunling Wang,Xiaohao Liu,Yun Hang Hu,Fangming Jin
Graphical POMs : SiW 12 O x /TiO 2 was demonstrated as an ultra-stable heterogeneous catalyst with tailored molecular interfacial structure and super acidity for photocatalytic oxidation of methane to formic acid. This fabrication method could be relevant for other type POMs based photocatalyst, which provide a way to fabricate ultra-stable molecular interface photo-catalyst with highly efficiency. The interface and surface acidity of heterogeneous catalysts are widely applied to manipulate the catalytic performance. However, the interface structure prepared by traditional synthesis processes required multistep procedures, which was still lack of controllability and stability. Here, we show a general synthetic approach to fabricate ultra-stable heterogeneous catalysts with tailored molecular interfacial structure and super acidity in one step. The as-synthesized SiW 12 O x /TiO 2 catalyst was used for photo-catalytic conversion of methane to value-added oxygenates. We propose that the formed molecular interface W 12 −OH−Ti coupled with the introduced Brønsted acid sites of POMs, results in enhancing the photocatalytic performance. Namely, the addition of SiW 12 O x can reduce the recombination of electrons and holes for triggering charge separation owing to the photoelectron capturing by proton, improving electron transfer to reactants and thereby promoting catalytic activity. This fabrication method provides a way to build molecular interface photo-catalyst by POMs with super acidity and ultra-stable structure.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 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）