Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 7
·3400-3408
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IF 14.511
Cheng Wang,Tianqi Yang,Wenkui Zhang,Hui Huang,Yongping Gan,Yang Xia,Xinping He,Jun Zhang
The use of solid electrolytes can fundamentally change energy storage systems due to their higher safety and energy density. Herein, we design hydrogen-bonded polyethylene oxide (PEO) composite solid electrolytes (CSEs), which are hydrolyzed by tetraethyl orthosilicate (TEOS) in alkaline solution to form SiO2 with rich hydroxyl groups on its surface. This in situ formed SiO2 can not only reduce the crystallinity of PEO and increase the ionic conductivity (1.8 × 10−4 S cm−1 at 30 °C), but also adsorb anions so as to increase the lithium-ion transference number (tLi+ = 0.42). More importantly, hydrogen bonding can be formed with PEO, LITFSI and succinonitrile to form an interconnected network to improve the mechanical strength (Young's modulus = 0.72 GPa). In addition, we avoid the poor film formability and low mechanical strength by adjusting the ratio of EO : Li to 30 : 1 to reduce the content of lithium salt in the CSEs. Due to the high mechanical strength, the critical current density of lithium symmetrical batteries is as high as 1.4 mA cm−2. Using this CSE, a solid state LiFePO4‖Li battery delivers a high discharge capacity of 161.2 mA h g−1 at 0.5C with a capacity retention of 88% after 400 cycles at 30 °C. The in situ formed highly dispersed SiO2 reinforced PEO with abundant hydrogen bonds enables high performance of solid-state lithium batteries at room temperature.
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Nanomaterials
·
2021
·Vol. 11
·期 11
·2886
·
IF 5.076
Chao Bai,Shi He,Huai-Ming Hu,Hui Zeng,Feng Zou,Ji-Jiang Wang
A europium(III) hybrid material Eu(tta)3bpdc-SiO2@mTiO2(Htta = 2-thenoyltrifluoroacetone, H2bpdc = 2,2′-bipyridine-3,3′-dicarboxylic acid) was successfully designed and synthesized by the covalent grafting complex Eu(tta)3bpdc to SiO2@mTiO2core–shell nanosphere. The FT-IR, PXRD, XPS, TEM, HRTEM, SAED, TGA and PL were performed to characterize these materials. The results indicate that core–shell nanosphere structure and anatase crystallites of SiO2@mTiO2are retained well after grafting the europium complex. Hybrid material Eu(tta)3bpdc-SiO2@mTiO2displays uniform nanosphere structure, bright red color and long lifetime, which can serve as a multicolor emission material modulated by using Al3+ions via the cation exchange approach under a single-wavelength excitation. To the best of our knowledge, this work is the first multicolor emissive sensor for Al3+ions based on the lanthanide hybrid material.Keywords:lanthanide hybrid materials;SiO2@mTiO2core–shell nanosphere;bipyridine derivative;multicolor luminescence
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高影响因子
Nano Research
·
2023
·
IF 9.9
Tong Zongwei,Yan Xiangjie,Wang Yuexiang,Li Kexun,Ma Weihai
Increasing porosity is one of the most direct ways to improve the thermal insulation and dielectric properties of materials. Until now, many wet methods for preparing Si 3 N 4 ceramic foams usually face the problems of complex rheology, long period, and expensive cost, and the reported pore sizes of Si 3 N 4 ceramic foams are typically micron-grade, resulting in a lack of competitiveness in thermal insulation and wave-transparent applications. In this paper, the Si 3 N 4 @SiO 2 ceramic foams were prepared using an efficient dry-method, which combined three processes of low temperature chemical vapor deposition (LTCVD), template, and isostatic pressing. The method has the advantages of simple operation and short preparation period, and can realize near-net size molding and mass production. In addition, the evolution mechanisms of honeycomb microstructure and composition of Si 3 N 4 @SiO 2 ceramic foam during sintering were studied by chemical reaction thermodynamics. The as-prepared Si 3 N 4 @SiO 2 ceramic foam possesses low density (0.377 g·cm −3 ), high compressive strength (7.5 MPa), low thermal conductivity (0.0808 W·m −1 ·K −1 ), and excellent dielectric properties ( ε < 1.32, tan δ < 0.009) in the frequency range of 8–18 GHz, and its maximum working temperature in air can reach up to 1100 °C. It will be recommended to be applied in the interlayer of Si 3 N 4 ceramic radome to improve its thermal insulation and electromagnetic wave transparency performances.
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Gels
·
2024
·Vol. 10
·期 2
·120
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IF 5
Jun Yang,Tengfei Dong,Jingtian Yi,Guancheng Jiang
This study addresses the performance challenges of Synthetic-Based Drilling Fluids (SBDF) in deep wells and high-temperature environments by engineering a novel multiple hydrogen-bonded crosslinked polymer, MBAH/nano-SiO2. Synthesized using methyl methacrylate (MMA), butyl methacrylate (BMA), acrylic acid (AA), N-hydroxyethyl acrylamide (HEAA), and nano-silica (nano-SiO2), the polymer improved crosslinking density, thermal properties, particle size distribution, and colloidal stability. The development of a ‘weak gel’ structure in W/O emulsions improved rheology and electrical stability (ES), with ES values reaching up to 775 V after aging at 180 °C. Moreover, the polymer’s amphiphilic structure and the synergistic effect of nano-SiO2increased emulsion film thickness and strength, further augmenting stability. The high-temperature and high-pressure filtration loss of SBDF was considerably reduced to 7.6 mL, benefiting well wall stability and reservoir damage control. This study provides crucial insights into optimizing multiple hydrogen-bonded crosslinked strategies and polymers in SBDF applications.
研究领域:
材料科学
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石油工程
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高影响因子
INTEGRATED FERROELECTRICS
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2020
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IF 0.557
Hai-Lin Cong,Qian-Qian Song,Song Wang,Bo-Ya Yu,Zhong-Min Geng,You-Qing Shen,Bing Yu
In this article, a magnetic-responsive microfiltration membrane based on three-dimensional (3 D) inverse colloidal crystal (ICC) was prepared with relatively simple approach. We designed the ICC membrane using self-assembly of Fe3O4@SiO2 colloidal crystal into a colloidal crystal template. The resulting close-packed colloidal crystal was infiltrated with a reactive monomer solution. After polymerization, the silica spheres were etched away, resulting in an ICC membrane with Fe3O4 nanoparticles inside. The typical ICC membrane was characterized by SEM and XRD. Meanwhile, We used the KCl diffusion to test the permeability of the membrane. The results illustrated that the highly ordered permeable polymer membrane was successfully prepared by using Fe3O4@SiO2 colloidal crystals as the templates. Furthermore, the functional ICC membrane exhibited excellent magnetic-responsive gating property to separation. The smart environment-responsive gating membranes have potential applications in filtration, sensors and other applications.
研究领域:
材料科学
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化学工程
·
环境科学
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高影响因子
TALANTA
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2017
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IF 4.162
Meng-Meng Wang,Qing Chen,Dan-Dan Zhang,Xu-Wei Chen,Ming-Li Chen
By virtue of the flexible structure of polyoxometalates , Ni 2+ is encapsulated into trivacant lacunary tungstophosphate ligands by the form of [Ni 4 ] cluster to offer a tetra-nickel substituted polyoxotungsate K 6 Na 4 [Ni 4 (H 2 O) 2 (PW 9 O 34 ) 2 ] (Ni 4 P 2 ). The Ni 4 P 2 is then immobilized onto the surface of SiO 2 nanoparticles by self-assembly under electrostatic interactions to give the product of Ni 4 P 2 @SiO 2 composites. Due to the specific affinity between substituted Ni 2+ in the polyoxotungsate and the histidine residues of protein, Ni 4 P 2 @SiO 2 composites exhibit highly adsorption selectivity towards histidine protein. This Ni 4 P 2 @SiO 2 composite is of high stability, and SDS-PAGE assay indicates that it can be used repeatedly as an efficient sorbent for the isolation of His6-tagged proteins from cell lysate with improved performance when compared with commercial NTA-Ni 2+ column.
研究领域:
生物化学
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材料科学
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蛋白质纯化
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2024
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IF 18.5
Zeyu Ma,Yuhao Wu,Shan Lu,Jianing Li,Jianbo Liu,Xiaodong Huang,Xiaodong Zhang,Yin Zhang,Guangneng Dong,Liguo Qin,Sen Yang
3D printing has shown promise in the development of notable sensing and health detection devices. Nonetheless, challenges remain in the concurrent development of highly durable wearable sensors with low-friction surfaces. This challenge serves as a limiting factor in the operational lifespans of these sensors. In this study, a magnetically assisted 3D printing technique is developed to fabricate composites reinforced with magnetic Fe 3 O 4 @SiO 2 nanochains (NCs) with dimensions of 60.2 µm in length (L) and 0.2 µm in diameter (D), indicating an L:D ratio exceeding 300. By applying a vertical magnetic field and extrusion flow field to the sensor's surface layer, the NCs can be arranged differently (together with the printed textures), reducing the coefficient of friction by 27.7% and improving the wear resistance. This approach is inspired by nacre, known for its impressive durability and resilience. A motion monitoring sensor with an extended lifespan is successfully fabricated by using liquid metal ink integrated with an anti-wear layer. These findings offer significant insights into the evolution of wearable sensors, demonstrating their adaptability to multi-material printing and resulting in improved performance and service lives.
研究领域:
材料科学
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纳米技术
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生物医学工程
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增材制造
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiongfei Du,Yang Li,Kaixuan Sun,Hailiang Liu,Mingxing Chen,Qinglin Huang
Poly (m-phenylene isophthalamide)-based loose nanofiltration membranes were fabricated by electrospinning and subsequential electrostatic layer by-layer self-assembly methods, and the polyelectrolyte multilayers (PEMs) generated by polyacrylic acid (PAA) and polyethyleneimine (PEI) were adopted to contribute the surface functional layer of nanofiber membranes. The incidences of spraying parameter and nano-SiO 2 content on the morphology, chemical constitution and dyes separation performance of PEMs functional layer was investigated, respectively. The results showed that the construction of the PEMs functional layer could obviously enhance the Congo red (CR) filtration efficiency by increasing the rejection from 4.9% to 99.8% and improve the surface hydrophilicity by reducing the water contact angle (WCA) from 90.1° to 51.8°. Nano-SiO 2 is introduced as a filler to regulate the assembly density of PEMs functional layers, the prepared PEMs/PMIA/SiO 2 membrane achieved a relatively stable permeation flux (22.9 L·m −2 ·h −1 ), and maintained high separation efficiency of CR/NaCl solution, revealing the excellent dye desalination performance, which exhibited a potential for the dye/salt wastewater treatment. In particular, we offered a new method to prepare loose nanofiltration (LNF) membranes by electrospinning and electrostatic self-assembly technique with accurate separation of inorganic salts and dye molecules.
研究领域:
材料科学
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环境工程
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高影响因子
JOURNAL OF FLUORESCENCE
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2024
·
IF 2.6
Wang Daifang,Shen Ligong,Liu Wenjun,Cao Xiao,Wang Qianwen
This article introduces a novel unlabeled surface-enhanced electrochemiluminescence (SEECL) sensor for malachite green (MG) detection. The SEECL sensor was prepared by modifying the Ru(bpy) 3 2+ doped gold-SiO 2 core–shell nanocomposites (Au@SiO 2 -Ru(bpy) 3 2+ ) on the gold electrode. Ru(bpy) 3 2+ of nanocomposites can not only emit electrochemiluminescence (ECL) with electrochemical reaction, but also induce the local surface plasmon resonance (LSPR) of gold core. That is beneficial to enhance the ECL signa of sensor. However, in the existence of MG, the luminescence of sensor would be quenched by the fluorescence resonance energy transfer (FRET) between MG and Ru(bpy) 3 2+ . In this paper, both fluorescence and ECL of the Au@SiO 2 -Ru(bpy) 3 2+ were investigated for MG detection. And the results show that the SEECL sensor has high sensitive to MG. Under the optimal experimental conditions, the minimum detection concentration could be achieved about 1.0 nM of MG, which fully meets the China national standard detection requirements of veterinary drug residue in seafood.
研究领域:
分析化学
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环境科学
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食品安全
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高影响因子
Molecular Catalysis
·
2020
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IF 3.687
Jingyi Yang,Yanping Fan,Zhong-Li Li,Zhikun Peng,Jing-He Yang,Baozhong Liu,Zhongyi Liu
Herein, we reported an effective method to synthesis a series of supported bimetallic Pd-M/SiO 2 (M = Pt, Ni, Cu, Co) catalysts with highly exposed and well-alloyed nanoparticles via simultaneous strong electrostatic adsorption (co-SEA), which controlled metal precursors strongly anchored onto the oppositely charged support (SiO 2 ) by changing the pH relative to the surface point of zero charge (PZC). The toluene and benzene hydrogenation were used as probe reactions to evaluate the catalytic hydrogenation activity performance of the Pd-M/SiO 2 catalysts. Compared to the catalysts synthesized by the common technique simultaneous dry impregnation (co-DI), the co-SEA Pd-Ni/SiO 2 catalyst exhibited the highest turnover frequencies (TOFs) of 3.7 s −1 for benzene hydrogenation and 3.2 s −1 for toluene hydrogenation. This was attributed to the large amount of electron-deficient Pdδ + sites on the surface of SEA Pd-M/SiO 2 that easily for electron-rich benzene and toluene to adsorb. Besides, the co-SEA catalysts produced well stability and reusability without significant decrease in the catalytic activity after six runs.
研究领域:
催化
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材料科学
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化学工程
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高影响因子
Materials
·
2020
·Vol. 13
·期 21
·5004
·
IF 3.057
Tianyu Wang,Cong Zeng
A great number of urban underground concrete water drainage systems in China are facing challenges of corrosion, blockage, and leakage. This could result in engineering accidents such as urban inland inundation, pipeline collapse, leakage, and blockage. The common contributing factors for pipeline leakage and blockage are the porous structures and the perishable surfaces of concrete pipes. To address these issues, we synthesized superhydrophobic coating materials such as SiO2aerosol, bisphenol A diglycidyl ether (DGEBA), and N-β-aminoethyl-γ-aminopropyltrimethoxysilane (AEAPTS). Our superhydrophobic coating on cement-based surfaces presents good waterproof ability, mechanical stability, and self-cleaning properties. Test results show that the superhydrophobic coating exhibits higher water discharge capacity and survivability to corrosive underground water drainage pipeline environments. Hence, this SiO2aerosol @ bisphenol A diglycidyl ether coating possesses enormous potential in surface modification of pipeline rehabilitation materials.Keywords:superhydrophobicity;SiO2aerosol @ bisphenol A diglycidyl ether coating;water drainage pipe;cement-based materials
研究领域:
土木工程
·
材料科学
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高影响因子
LANGMUIR
·
2017
·
IF 3.833
Lei Bao,Zihan Ji,Hongning Wang,Ruoyu Chen
Antireflective coatings with superhydrophobic, self-cleaning, and wide-spectrum high-transmittance properties and good mechanical strength have important practical value. In this research, hollow nanorod-like MgF2 sols with different void volumes were prepared by a template-free solvothermal method to further obtain hollow nanorod-like MgF2 crystals with an ultralow refractive index of 1.14. Besides, a MgF2 coating with an adjustable refractive index of 1.10–1.35 was also prepared by the template-free solvothermal method. Then through the combination of base/acid two-step-catalyzed TEOS and hydroxyl modification on the surface of nanosilica spheres, the SiO2 coating with good mechanical strength, a flat surface, and a refractive index of 1.30–1.45 was obtained. Double-layer broadband antireflective coatings with an average transmittance of 99.6% at 400–1400 nm were designed using the relevant optical theory. After the coating thickness was optimized by the dip-coating method, the double-layer antireflective coatings, whose parameters were consistent with those designed by the theory, were obtained. The bottom layer was a SiO2 coating with a refractive index of 1.34 and a thickness of 155 nm, and the top layer was a hollow rodlike MgF2 coating with a refractive index of 1.10 and a thickness of 165 nm. The average transmittance of the obtained MgF2–SiO2 antireflective coatings was 99.1% at 400–1400 nm, which was close to the theoretical value. The hydrophobic angle of the coating surface reached 119° at first, and the angle further reached 152° after conducting surface modification by PFOTES. In addition, because the porosity of the coating surface was only 10.7%, the pencil hardness of the coating surface was 5 H and the critical load Lc was 27.05 N. In summary, the obtained antireflective coatings possessed superhydrophobic, self-cleaning, and wide-spectrum high-transmittance properties and good mechanical strength.
研究领域:
材料科学
·
光学工程
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高影响因子
危险品化学品经营许可证（带存储）