COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Shibin Nie,Zongquan Zhao,Wenli Zhai,Jinian Yang,Hong Zhang,Dongyue Zhao,Jingwen Wang
Epoxy resin (EP) is a versatile material widely employed in diverse fields such as electronic encapsulation, coatings, and adhesives. The optimization of flame-retardant, mechanical and interfacial properties in composites through material modification and compounding represents a prominent research focus within the field of EP. This study presents a novel approach by synthesizing MOF-derived nickel phyllosilicate (K–NiPS) and compounding it with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) into the EP matrix. The incorporation of 5 wt% total K–NiPS and DOPO, with a mass ratio of 2:3, achieves a UL-94 V-0 rating and enhances the limiting oxygen index from 23.5 to 28.8 %. This combination also reduced the peak heat release rate, peak smoke release rate, and total smoke release by 44.6 %, 53.6 %, and 37.8 % respectively. Besides, the interface optimization effect of K–NiPS in collaboration with DOPO improved the tensile strength of EP/2K–NiPS/3DOPO from 77.5 MPa to 94.3 MPa, and the wear rate was only 1.25 × 10 −5 mm 3 /(N·m), which is 82.2 % lower than that of pure EP. This study will pave the way for the applied interface design of multi-functional EP.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2012
·
IF 2.237
Xiao Chen,Miao Li,Jingchao Guan,Xinkui Wang,Christopher T. Williams,Changhai Liang
Nickel–silicon intermetallics have been prepared by a direct silicification method using SiH4 as the silicon source. The prepared nickel–silicon intermetallics were characterized by X-ray diffraction, transmission electron microscopy, temperature-programmed reduction, temperature-programmed desorption, X-ray photoelectron spectroscopy, and CO chemisorption measurements. The catalytic hydrogenation of cinnamaldehyde and phenylacetylene over the nickel–silicon intermetallics was investigated. Nickel–silicon intermetallics presented much higher selectivity to the intermediate product (hydrocinnamaldehyde) than monometallic nickel catalyst, which may be attributed to the repulsive force between the electronegative silicon atoms in the nickel–silicon intermetallics and oxygen atoms in the C═O bond of cinnamaldehyde. In addition, nickel–silicon intermetallics showed excellent selectivity for the hydrogenation of phenylacetylene to styrene (ca. 93%) due to the strong modification of the electronic structure derived from the interaction of nickel and silicon.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 8
·期 4
·2201231
·
IF 8.856
Mingdeng Huang,Weiguang Lin,Yisimayili Tuersun,Xu Huang,Sheng Chu
Room-temperature liquid metals, such as galinstan, have become an emerging material in electronics requiring stretchability and deformability due to its excellent fluidity and conductivity. Eutectic gallium-indium-tin (galinstan)-based composites with certain metallic fillers can obtain magnetism. However, the alloying reaction between galinstan and metals leads to the solidification and reduction in stability of the composite. In this study, Ni@SiO 2 nanoparticles with the core–shell structure are used as fillers and galinstan as matrix. The obtained galinstan-Ni@SiO 2 paste is fairly stable and this is attributed to the silica shell, which acts as a barrier to isolate the direct contact between the Ni and galinstan. In addition, flexible circuits composed of as-prepared galinstan-Ni@SiO 2 pastes are fabricated, which exhibited outstanding durability, retrievability, and self-healing ability under the drive of magnetic field.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Bo Jiang,Lin Li,Zhoufeng Bian,Ziwei Li,Mazen Othman,Zhehao Sun,Dawei Tang,Sibudjing Kawi,Binlin Dou
This paper describes the synthesis of a series of x CeNi-PSNT (phyllosilicate nanotube) oxygen carriers (OCs) and presents the effect of Ce loading on the performance in chemical looping reforming (CLR) of glycerol. Various characterization techniques including N 2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), H 2 temperature-programmed reduction (TPR), X-ray photoelectron spectra (XPS) and O 2 volumetric chemisorption were employed to investigate the physicochemical properties of the fresh and used OCs. The characterization results demonstrated that the PSNT structure possessed strong confinement effect and that the Ce promotion improved Ni dispersion and the reducibility of NiO particle and isolated Ni ions. The enhanced reducibility significantly shortened the dead time in the fuel feed step, resulting in the high H 2 generation efficiency. The reactivity and stability tests were conducted in a fixed-bed reactor. A Ce/Ni mass ratio of 0.5 was optimized for CLR with an average H 2 yield of 12.5 wt%, an average NiO conversion of 67%, and an accumulated coke deposition of 3.8 wt% in a 10-cycle stability test. The confinement effect of PSNT and Ce promotion both have positive effects on attaining the excellent performance.
研究领域:
材料科学
·
能源工程
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Xuefang Chen,Ying Huang,Kaichuang Zhang
A novel type of cobalt nanofibers coated with layered nickel silicate (Co nanofibers @ voids @ Ni 3 Si 2 O 5 (OH) 4 ) coaxial core-shell composites were successfully prepared via a well-known Stöber process and two hydrothermal methods. In the composites, the international nanosheet structure of the nickel silicate provided interlayer spaces for lithium ions in the process of insertion and extraction. The cobalt nanofibers served as a mechanical support for the nickel silicate nanosheets, which increased the electrical conductivity of the whole electrode. In addition, one-dimensional coaxial structure was stable to buffer the volume change and avoid the destruction of the structure. Moreover, the voids provided effective channels for the transportation of lithium ions. The Co nanofibers @ voids @ Ni 3 Si 2 O 5 (OH) 4 ) coaxial core-shell composites presented superior electrochemical properties compared with the published Ni 3 Si 2 O 5 (OH) 4 -related materials. With the advantages of exceptional performances and facile preparation, the composites show prospective application potential as advanced anode materials in lithium ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2024
·
IF 3.9
Liu Pengwei,Wei Manlin,Shen Xiaojuan
Due to the good integration with the current silicon-based electronic devices, silicon-based supercapacitor have been considered as one of the promising energy storage devices. However, their practical application is largely hindered by complex and costly manufacturing processes. In this study, a novel NiSi@MnO x electrode was fabricated with a simple and cost-effective method, where Ni nanoparticles and MnO x nanoparticles were sequentially electrodeposited on the silicon nanowire arrays (SiNWs). Ni particles served as the protective layer on the silicon surface as well as the current collector of the composite, and MnO x functioned as the electrochemical material of the electrode. As the deposition time of MnO x increased, the structure of NiSi@MnO x changed from core–shell to embedded. The electrochemical results demonstrated that when MnO x was embedded in Silicon nanowires, the NiSi@MnO x electrode achieved an excellent area capacitance of 328.6 mF/cm 2 at 1 mA/cm 2 , which also displayed an impressive capacitance retention of 79.05% after 7000 cycles. Additionally, an all-solid-state asymmetric SC (ASC) of NiSi@MnO x //Fe 2 O 3 /N-rGO was fabricated by using NiSi@MnO x as positive electrode, Fe 2 O 3 /N-rGO loaded on NF as negative electrode. The ASC exhibited a remarkable energy density of 0.021 mWh/cm 2 at the power density of 0.7998 mW/cm 2 , surpassing the majority of reported values for silicon-based/MnO x -based supercapacitors. This study provides a simple, time-effective, and low-cost method to prepare high-performance 3D silicon-based electrodes. Graphical Abstract
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Yang Wang,Guangchuan Wang,Yun Xiao,Yuling Yang,Ruikang Tang
Recent developments of nanotechnology encourage novel materials for facile separations and purifications of recombinant proteins, which are of great importance in disease diagnoses and treatments. We find that Fe3O4@NiSiO3 with yolk–shell nanostructure can be used to specifically purify histidine-tagged (His-tagged) proteins from mixtures of lysed cells with a recyclable process. Each individual nanoparticle composes by a mesoporous nickel silicate shell and a magnetic Fe3O4 core in the hollow inner, which is featured by its great loading efficiency and rapid response toward magnetic fields. The abundant Ni2+ cations on the shell provide docking sites for selective coordination of histidine and the reversible release is induced by excess imidazole solution. Because of the Fe3O4 cores, the separation, concentration, and recycling of the nanocomposites become feasible under the controls of magnets. These characteristics would be highly beneficial in nanoparticle-based biomedical applications for targeted-drug delivery and biosensors.
研究领域:
生物技术
·
纳米医学
·
蛋白质纯化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Yuying Jiang,Xibin Zhou,Yifeng E,Pengyan Wei,Peng Chen,Li Li,Zhuozhe Li,Thomas F. Krenzel,Kun Qian
The design and synthesis of novel electrode catalysts is an applicable strategy to improve the performance of direct methanol fuel cells (DMFCs). The catalyst is composed of molybdenum disulfide as the shell and nickel silicide-doped sodalite (MoS 2 /NiSi@SOD) as the core. A series of characterization results indicate that NiSi is highly dispersed in the nanosized SOD cage on the surface of the SOD zeolite at the crystal faces of (011), (102), and (201). A thin conductive protective cover is formed by MoS 2 on the surface of the zeolite . By the cyclic voltammetry (CV), the catalyst performs a maximum current density of 46.9 mA cm −2 (1250.1 A g Ni −1 ) with 10 M methanol while no remarkable catalyst poisoning and catalyst deactivation are observed. It is revealed that MoS 2 /NiSi@SOD under high catalysis activity protects the Ni from the drain in the alkaline electrolyte , leading to a broad application prospect as a noble-metals-free DMFC catalyst.
研究领域:
材料科学
·
电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Liu Ting-Ting,Ye Zhuo-Feng,Li Shang-Qi,Zhang Yi,Zhang Yao-Wen,Li Xin-Tao,Du Fei-Hu
Silicon, with its many advantages, is gaining attention in the field of lithium-ion battery anode materials. However, severe volume swelling, poor conductivity, and slow Li + diffusion kinetics are major obstacles to enhancing the electrochemical properties of silicon anodes. One-dimensional silicon nanowires with a high aspect ratio can effectively ameliorate these issues, while the complexity of the synthesis method limits its development. Here, a three-dimensional flexible electrode of binary-phase Ni-silicide foam loaded with silicon nanowires (Ni x Si y @Si NWs) was constructed in two simple steps: preparation of metal catalyst nanoparticles using a chemical plating approach and production of silicon nanowires by the supercritical fluid-liquid–solid mechanism. Benefiting from the excellent anchoring ability and superior electrical conductivity of Ni x Si y as well as the extra space and favorable Li + and electrolyte diffusion paths provided by the Si NWs network, the as-obtained anode exhibits a high initial Coulombic efficiency of 77% at 0.5 A g −1 , excellent cycling performance (a reversible capacity of 1238 mAh g −1 after 200 cycles) and outstanding rate capability (2675, 2497, 2164, 1740, and 1222 mAh g −1 at 0.5, 1, 2, 4, and 8 A g −1 , respectively).
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Jia Lin,Shuting Wu,Chenyao Tang,Xiaohua Chen,Ying Zheng
The silicon- modified nickel oxide catalysts with the same compositions but distinct Ni-Si interactions were obtained via different synthesis routes and utilized for methane combustion under conditions of oscillating temperatures. For catalysts prepared by co-grinding, amorphous SiO 2 was dispersed on the surface of large NiO crystallites . During high-temperature calcination or reactions, the crystallization of SiO 2 , coupled with the sintering or decomposition of NiO crystallites , led to the inferior catalytic activity and stability. Interactions between Ni and Si species were enhanced in catalysts synthesized by precipitation. The Si species was incorporated into the NiO lattice to inhibit the growth of NiO crystallites and to generate nickel silicate species under thermal treatments. The small NiO crystallites provided more Ni 3+ and active oxygen species for methane activation and oxidation , while the bulk nickel silicate species played a pivotal role in improving thermal stability, conjointly provoking excellent catalytic performance in cyclic heating–cooling tests between 180 and 800 °C. This study offers new insights into the design of metal oxide composites for catalytic applications.
研究领域:
催化化学
·
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2019
·Vol. 3
·期 10
·2090-2101
·
IF 0
Qiushi Wang,Yifu Zhang,Jinqiu Xiao,Hanmei Jiang,Xiaojuan Li,Changgong Meng
Herein, a facile strategy was developed for the preparation of a nanostructured nickel silicate–nickel hydroxide composite (NiSi–Ni(OH)2) with two types of morphologies, including coated hollow nanospheres (NiSi@Ni(OH)2) and platelet-assembled hollow spheres (Ni(OH)2-Si) as a positive electrode material in hybrid supercapacitors. This strategy involved the use of nano-sized SiO2 derived from the Stöber method as the silicon source and a single-step hydrothermal method. The as-synthesized NiSi–Ni(OH)2 composite exhibited a battery-like redox behavior and relatively high charge storage property (476.4 F g−1 at 2 A g−1) when measured in a three-electrode system. It also delivered high stability during long-term cycling (103.3% after 10 000 cycles), which is mainly due to the synergistic effect after the combination of the two materials, where the hollow spherical structures facilitate the fast diffusion of electrolyte ions and enable the fast transmission of electrons. Considering its practical applications, a hybrid asymmetric supercapacitor (HSC) device was assembled using NiSi–Ni(OH)2 as the positive electrode and porous activated carbon as the negative electrode in PVA–KOH electrolyte gel. The HSC exhibited a capacitance of 674.7 mF cm−2 at 2 mA cm−2, corresponding to a maximum energy and power density of 21.6 W h kg−1 (5.2 W h cm−3) and 431.7 mW kg−1 (104.3 mW cm−3), respectively. These properties demonstrate the potential of the hollow-structured NiSi–Ni(OH)2 composite for achieving high-energy and stable energy storage systems.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
Catalysis Science & Technology
·
2019
·Vol. 9
·期 5
·1108-1116
·
IF 5.726
Liangliang Zhang,Xiao Chen,Yujing Chen,Zhijian Peng,Changhai Liang
Chemoselective hydrogenation of phthalic anhydride is regarded as the most promising route for producing downstream high-performance phthalide. A series of intermetallic cobalt–nickel silicide catalysts embedded in a carbon matrix (CoxNi2−xSi@C) with acid-tolerance prepared by microwave-assisted chemical vapor deposition have been investigated in this reaction system. Activity measurements show a remarkable positive synergistic effect, forming a volcano-shaped plot over the nominal Co metal fraction for CoxNi2−xSi@C catalysts with a peak at x = 1.5, which corresponds to a 4.5-fold enhancement of the yield of phthalide over Co2Si@C and a 2.0-fold enhancement over the Ni2Si@C monometallic silicide catalysts, which can be correlated with the interaction of cobalt–nickel and metal–silicon bonds. In addition, the cobalt-rich bimetallic silicide exhibits an equal activity to the reference noble metal catalysts (Au, Pd, and Pt) and a significantly higher activity than transition metal catalysts. Moreover, the bimetallic silicide as an intermetallic compound catalyst has demonstrated robust acid corrosion resistance compared to the corresponding metal catalysts.
研究领域:
催化化学
·
材料科学
✓ 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）