POWDER TECHNOLOGY
·
2023
·
IF 5.2
Jian Shi,Ruiqian Li,Jingwei Li,Guicheng Liu
Improving the electrical conductivity and structural integrity of Si/C anodes is of great concern for lithium-ion batteries which can be effectively achieved by doping graphene. However, it is difficult to achieve graphene-doped Si/C composites with good interface contact and conductive architecture. Herein, an in-situ graphene-doped carbon coated silicon nanoparticles (SiNPs) with multilayer architecture is designed. SiNPs is firstly modified and coated by polymethyl methacrylate (PMMA) shell. Multilayer carbon architecture is constructed via co-pyrolysis method using PMMA and citric acid as carbon sources. It displays an excellent lithium storage performance with a reversible discharge capacity of 2117.5 mAhg −1 at 200 mAg −1 . These impressive anodic properties are chiefly benefited from the ingenious carbon architecture coated SiNPs involving in-situ graphene with a strong interfacial bonding interaction. Overall, this investigation can not only broaden the application potential in LIBs for advanced Si/C anodes but also provide an alternative route on designing a graphene-related material.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jing Wang,Xiameng Shan,Peiying Hu,Chengjiao Zhang,Dengsen Yuan,Xueyan Hu,Jin Wang
Passive thermal regulation has attracted increasing interest owing to its zero-energy consumption capacity, which is expected to alleviate current crises in fossil energy and global warming. In this study, a biomimetic multilayer structure (BMS) comprising a silica aerogel, a photothermal conversion material (PTCM), and a phase change material (PCM) layer is designed inspired by the physiological skin structure of polar bears for passive heating with desirable temperature and endurance. The transparent silica aerogel functions as transparent hairs and allows solar entry and prevents heat dissipation; the PTCM, a glass plate coated with black paint, acts as the black skin to convert the incident sunlight into heat; and the PCM composed of n-octadecane microcapsules stores the heat, regulating temperature and increasing endurance. Impressively, outdoor and simulated experiments indicate efficient passive heating (increment of 60 °C) of the BMS in cold environments, and endurance of 157 and 92 min is achieved compared to a single aerogel and PTCM layer, respectively. The uses of the BMS for passive heating of model houses in winter show an increase of 12.1 °C. COMSOL simulation of the BMSs in high latitudes indicates robust heating and endurance performance in a −20 °C weather. The BMS developed in this study exhibits a smart thermal regulation behavior and paves the way for passive heating in remote areas where electricity and fossil energy are unavailable in cold seasons.
研究领域:
材料科学
·
能源工程
·
仿生学
✓ 已验证
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Fan Zhang,Zhengjun Yao,Oleksandr Moliar,Zelei Zhang,Xuewei Tao
Using the principle of electrochemical additive manufacturing (ECAM), a nanocrystalline Ni Co binary alloy coating was prepared on the surface of the steel substrate. This study shows the pulse-shaped current-time curve of ECAM during the coating preparation process, and the nanocrystalline Ni Co coating has a regular multilayer structure. At the same time, the ECAM method can effectively limit the growth time of the crystal nucleus and prepare nanocrystalline Ni Co alloy coatings with ultra-low energy consumption (5.75 × 10 −3 W). Besides, as the content of Co in the coating increases, the Ni Co alloy coating changes from an FCC single-phase structure to an FCC + HCP multi-phase structure. Finally, through the performance test of the nanocrystalline Ni Co coating, it is concluded that as the content of Co in the coating increases, the hardness of the coating increases, and the coating surface has a certain degree of hydrophobicity (100°–114°). The electrochemical corrosion test shows that the Ni Co coating has better corrosion resistance than the steel substrate. As the content of Co in the coating increases, the corrosion current density of the Ni Co coating increases from 9 μA/cm 2 to 32 μA/cm 2 .
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
DOI
高影响因子
Biosensors-Basel
·
2021
·Vol. 11
·期 11
·462
·
IF 5.519
Yangguang Zhu,Qichen Tian,Xiufen Li,Lidong Wu,Aimin Yu,Guosong Lai,Li Fu,Qiuping Wei,Dan Dai,Nan Jiang,He Li,Chen Ye,Cheng-Te Lin
Considering the vital physiological functions of dopamine (DA) and uric acid (UA) and their coexistence in the biological matrix, the development of biosensing techniques for their simultaneous and sensitive detection is highly desirable for diagnostic and analytical applications. Therefore, Ti3C2Tx/rGO heterostructure with a double-deck layer was fabricated through electrochemical reduction. The rGO was modified on a porous Ti3C2Txelectrode as the biosensor for the detection of DA and UA simultaneously. Debye length was regulated by the alteration of rGO mass on the surface of the Ti3C2Txelectrode. Debye length decreased with respect to the rGO electrode modified with further rGO mass, indicating that fewer DA molecules were capable of surpassing the equilibrium double layer and reaching the surface of rGO to achieve the voltammetric response of DA. Thus, the proposed Ti3C2Tx/rGO sensor presented an excellent performance in detecting DA and UA with a wide linear range of 0.1–100 μM and 1–1000 μM and a low detection limit of 9.5 nM and 0.3 μM, respectively. Additionally, the proposed Ti3C2Tx/rGO electrode displayed good repeatability, selectivity, and proved to be available for real sample analysis.
研究领域:
生物传感技术
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
Small
·
2024
·
IF 13
Haodong Gu,Li Tian,Qiuqi Zhang,Xiao You,Mengmeng Wang,Shaoming Dong,Jinshan Yang
Electromagnetic protection in extreme environments requires materials with excellent thermal insulation capability and mechanical property to withstand severe temperature fluctuations and complex external stresses. Achieving strong electromagnetic wave absorption (EMA) while sustaining these exceptional properties remains a significant challenge. Herein, a facile approach is demonstrated to fabricate a biomimetic leaf-vein MXene/CNTs/PI (MCP) aerogel with parallel venations through bidirectional freeze-casting method. Due to its multi-arch lamellar structure and parallel venations within the aerogel layers, the ultralight MCP aerogel (16.9 mg·cm −3 ) achieves a minimum reflection loss (RL min ) of −75.8 dB and a maximum effective absorption bandwidth (EAB max ) of 7.14 GHz with an absorber content of only 2.4 wt%, which also exhibits superelasticity and structural stability over a wide temperature range from −196 to 400 °C. Moreover, this unique structure facilitates rapid heat dissipation within the layers, while significantly impeding heat transfer between adjacent layers, achieving an ultralow thermal conductivity of 15.3 mW·m −1 ·K −1 for thermal superinsulation. The combination of excellent EMA performance, robust structural stability, and thermal superinsulation provides a potential design scheme under extreme conditions, especially in aerospace applications.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Jinyu Guo,Jianjun Chen,Jinxia Li,HAFSA,Hao Chen
In order to improve the high-temperature resistance and thermal insulation of SiC nanofiber aerogel, the structural design and preparation of SiC nanofiber composite aerogel felt were carried out based on the heat transfer mechanism. A novel multi-layer SiC nanofiber aerogel felt was prepared with the ablative layer (ZrO 2 /ZrSiO 4 anti-oxidation layer), opacifiers layer (TiO 2 and SiC), and heat insulation layer (SiC nanowire aerogel). Compared with the single SiC nanowire aerogel, the oxidation resistance temperature of SiC nanofiber composite aerogel felt increased from 1300 ℃ to 1500 ℃ during aerobic calcination. With the butane gun ablation, the back temperature of the single SiC nanofiber aerogel felt was 308 ℃, while the back temperature of the composite aerogel felt was only 130 ℃. The structural design of the multi-layer SiC nanofiber composite aerogel felt provides an approach to improving thermal insulation properties in extreme environments.
研究领域:
材料科学
·
热力学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Haiyang Du,Haipeng Yu,Daniel K. Macharia,Haiyan Zeng,Haifeng Wang,Ran Cao,Nuo Yu,Meifang Zhu,Zhigang Chen
High-energy ionizing radiation brings serious challenges to medical professionals, and it demands efficient and lightweight shielding materials depending on high-Z elements and structural supporting matrices. Herein, we have integrated multiple high-Z elements and multilayer structures into composite films with interlayer scattering effects for constructing high-energy X-ray shielding clothes. A series of composite films containing different combinations of X-ray shielding particles (SnO 2 , BaSO 4 , and Bi 2 O 3 ) were prepared in tightly connected two layers with each layer consisting of corresponding hybrid polyacrylonitrile (PAN) fibers-reinforced hybrid thermoplastic polyurethane (TPU) coating. The optimized composite film L Ba3.7 /L Bi3.7 avoids lead toxicity and has a tensile strength of 17.92 MPa and high flexibility due to the reinforcing effect of PAN hybrid fibers. The L Ba3.7 /L Bi3.7 with a density of ∼ 2.98 g cm −3 and a thickness of 2.24 mm exhibits 18 % lighter than the 0.5 mmPb lead apron. Owing to the combination of multiple particles and layer structures, the absorption and interlayer scattering effects of L Ba3.7 /L Bi3.7 are leveraged to confer a high X-ray shielding efficiency of 96.3 % at 100 keV, surpassing single-element films and closing to 0.5 mmPb lead apron. This work offers a viable strategy for developing flexible, lightweight, and efficient wearable materials for high-energy X-ray shielding.
研究领域:
材料科学
·
医学防护
·
辐射防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2021
·
IF 6.141
Lijie Liu,Jinhong Li,Yong Deng,Zhiwei Yang,Kaiyue Huang,Siyi Zhao
Phase change materials with an ability to store the renewable thermal energy find widespread applications as building materials and temperature control devices. In this study, a lightweight and energy-efficient temperature regulating material based on the sandwich structure of Na 2 SO 4 ·10H 2 O, expanded vermiculite and magnesium oxychloride cement has been reported. The composite material responded in the range 20–40 °C and extended the heating and cooling period of the indoor temperature. The developed material exhibited an improved application performance as compared to the traditional heat preservation materials. Further, the supercooling of Na 2 SO 4 ·10H 2 O/expanded vermiculite was determined to be 1.20 °C, along with shape stability. Different synthesis methods and phase change materials with cement were explored to minimize the degradation of the thermal regulation performance, and the sandwich structure was observed to exhibit the optimal performance. Owing to the low thermal conductivity of Na 2 SO 4 ·10H 2 O/expanded vermiculite and magnesium oxychloride cement, the extended holding time of the indoor temperature was observed. The developed material exhibits significant potential for future applications as self-regulating materials and novel temperature control devices in which the optimal thermo-physical properties are desirable.
研究领域:
建筑材料
·
能源材料
·
热物理工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2020
·
IF 7.246
Qingbin Qi,Yu Wang,Wei Wang,Dan Yu
Many new laboratory-scale photothermal conversion materials have been developed for purification or desalination but developing easy-to-manufacture, low-cost and scalable materials with high efficiency of solar energy to thermal energy still faces great challenges. Herein, we provided a simple and effective method for self-assembly of dopamine-modified boron nitride (BN-PDA) and carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) layers on cotton fabric (CF), and assembled a solar steam generator by using the as-prepared composite cotton fabric as photothermal layer, cotton yarns (CYs) as water supply channel, and thermally insulated polystyrene (PS) foam as a supporting material. This solar steam generator exhibited a superior evaporation rate of 1.55 kg m −2 h −1 and an excellent photothermal conversion efficiency of ∼83.66% under 1.0 sun irradiance (1.0 kW m −2 ), with optical absorption up to 93.50% in the wavelength of 300–2500 nm. Meanwhile, excellent quality of freshwater from seawater and dyeing wastewater was also demonstrated. Different from other solar steam generator systems, this assembled fabric is cost-effective and readily available, suitable for large-scale industrial applications. Notably, the results show that multi-layer structure imparts it with outstanding mechanical flexibility and robustness, making it a potential candidate for fresh water supply in remote, off-grid or water-contaminated areas.
研究领域:
材料科学
·
环境科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xinyan Li,Teng Wang,Guilan Zhang,Xin Wen,Xinchuan Ma,Gang Xie,Lan Ma,Liyun Zhang
Developing an anti-fouling and multifunctional membrane with efficient separation performance is great potential for alleviating water crisis. Here, combining the heterogeneous β-FeOOH/Ag catalyst layer, intercepted GO nanosheets layer, and porous polyvinylidene fluoride (PVDF) substrate, a multi-layer composite membrane (β-FeOOH@GO/AgNWs) was designed and fabricated by the polyphenol (TA)-metal (Fe 3 + ) crosslinking and inductive effect. Hence, the β-FeOOH@GO/AgNWs membrane possesses robust physical and chemical stability, superhydrophilicity (water contact angle ∼0°) and underwater superoleophobicity (underwater oil contact angle >150°). Due to the construction of heterojunctions of β-FeOOH/Ag, the β-FeOOH@GO/AgNWs membrane achieved the degradation of various dyes under the photo-Fenton system, the degradation rate constant is 0.0986 min −1 . Meanwhile, the synergistic effect of multi-layer structure can efficiently intercept the various soluble dyes by electrostatic effect, π-π action and layered channels, the reject rate recached above 97.89 % under the acidic and neutral environment. Faced the membrane fouling phenomenon during the separation process, the flux and rejection of fouled membrane recovered to above 95.1 % and 97.9 % after photo-Fenton cleaning for 10 min. Moreover, the β-FeOOH@GO/AgNWs membrane also realized efficient separation performance for various oil-in-water emulsions, the flux reached 329.2 ± 25–486.1 ± 15 L m −2 h −1 bar −1 , the corresponding separation efficient was above 99 %. Similarly, the photo-Fenton cleaning strategy also regenerated the fouled composite membrane, the flux recovery rate was above 95 %. Therefore, we think that β-FeOOH@GO/AgNWs membrane can bring a new thinking of developing the multifunctional membrane to achieve complex wastewater remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xuefeng Li,Chunchen Zhang,Shuting Wu,Xing Chen,John Mai,Ming-Wei Chang
Advances in personalized medicine will require custom drug formulations and delivery mechanisms. Herein, we demonstrate a new type of personalized capsule comprising of printed concentric cylindrical layers with each layer having a distinctive functional drug component. Poly ε-caprolactone (PCL) with paracetamol (APAP) and chlorpheniramine maleate (CM), synergistic drugs commonly used to alleviate influenza symptoms, are printed as an inner layer and outer layer, respectively, via microscaled electrohydrodynamic (EHD) printing. Polyvinylpyrrolidone (PVP) nanofibers are embedded as interlayers between the two printed PCL-drug layers using electrospinning (ES) techniques. The complete concentric cylindrical capsule with a 6 mm inner diameter and 15 mm length can be swallowed for oral drug delivery. After dissolution of the PVP interlayer, the capsule separates in two, with inner and outer capsules for continuous drug dosing and targeting. Imaging was achieved using a 3T MRI system which allowed temporal observations of the targeted release through the incorporation of nanoparticles (Fe3O4). The morphology and structure, chemical composition, mechanical properties, and biocompatibility of the capsules were studied in vitro. In summary, this new type of custom printed and electrospun capsule that enabled component separation, targeted drug release may advance personalized medicine via multidrug oral delivery.
研究领域:
药剂学
·
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xin-Yu Kang,Zhi-Hao Zhao,Yu-Kai Lv,Yejing Dai
The large temperature dependence of electro-strain for Bi 0.5 Na 0.5 TiO 3 (BNT)-based ceramics limits their practical applications. In this work, Li-doped BNT-based lead-free multi-layer piezoelectric ceramic actuators are prepared by solid-state reaction synthesis method. The multi-layer actuator structure is fabricated by gradient doping, in which each layer corresponds to different compositions, with enhanced temperature stability compared to the single-layer one. For specific composition, it could achieve maximum electro-strain value at a certain temperature. Therefore, the electro-strain of each layer in this BNT-based multi-layer actuator could compensate each other at different temperatures with improved temperature stability. Consequently, the electro-strain of the five-layer structure varies less than ∼12% when the temperature changes from 50 °C to 130 °C, and a large electro-strain of 600 pm/V could be obtained at 70 °C. This work provides an effective approach by gradient doping to broaden the use temperature range for BNT-based actuators with improved temperature stability.
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
危险品化学品经营许可证（带存储）