Nano Research
·
2024
·
IF 9.5
Dai Qiuying,He Xun,Yao Yongchao,Dong Kai,Liu Xuwei,Guo Xiankun,Chen Jie,Fan Xiaoya,Zheng Dongdong,Luo Yongsong,Sun Shengjun,Li Luming,Chu Wei,Farouk Asmaa,Hamdy Mohamed S.,Sun Xuping,Tang Bo
It is of great importance to design and develop electrocatalysts that are both long-lasting and efficient for seawater oxidation. Herein, a three-dimensional porous cauliflower-like Ni 3 S 2 foam on Ni foam (Ni 3 S 2 foam/NF) is proposed as a high-performance electrocatalyst for the oxygen evolution reaction in alkaline seawater. The as-synthesis Ni 3 S 2 foam/NF achieves exceptional efficacy, achieving a current density of 100 mA·cm −2 at mere overpotential of 369 mV. Notably, its electrocatalytic stability extends up to 1000 h at 500 mA·cm −2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2016
·
IF 3.719
Liuyan Yin,Xingui Zhou,Jinshan Yu,Honglei Wang,Changchun Ran
A novel route was developed to fabricate Si 3 N 4 /epoxy composite. In this route, the Si 3 N 4 particles were constructed into the foamed shape by using protein foaming method, firstly. Then the Si 3 N 4 foams were sintered to bond these Si 3 N 4 particles together. Finally, the Si 3 N 4 /epoxy composite was fabricated by infiltrating the epoxy resin solution into the sintered Si 3 N 4 foams. This route was proved to be an efficient way in enhancing the thermal conductivity of epoxy matrix at a low loading fraction. For example, the thermal conductivity of the as-prepared Si 3 N 4 /epoxy composite with a loading fraction of 22.2 vol% was up to 3.89 W m −1 K −1 , which was about 17 times higher than that of neat epoxy.
研究领域:
材料科学
·
热传导工程
✓ 已验证
DOI
高影响因子
Materials Today Physics
·
2023
·
IF 11.5
Zirui Jia,Di Lan,Ming Chang,Yun Han,Guanglei Wu
Composite of magnetic materials with two-dimensional semiconductor Mxene is a common way to design electromagnetic wave absorbing (EWA) materials, but the lack of three-dimensional (3D) structure limits its application. Here, we will select one-dimensional Co 3 O 4 chains with mild magnetic permeability to assemble with two-dimensional Ti 3 C 2 T x MXene lamellae and coat the Co 3 O 4 /Ti 3 C 2 T x MXene composite on the surface of modified melamine foam skeleton by vacuum impregnation method. The melamine foam skeleton provides good mechanical properties for the composite wave-absorbing mention and contributes to the construction of Ti 3 C 2 T x MXene conductive network. The results show that Co 3 O 4 /Ti 3 C 2 T x /MF exhibits the minimum reflection loss (RL) intensity value of −51.31 dB at 2.4 mm matching thickness and achieves the maximum effective absorption bandwidth (EAB) of 6.96 GHz at 2.3 mm matching thickness. The present work provides the feasibility for the preparation of highly efficient Ti 3 C 2 T x MXene-based absorbers under low filling.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Jun Wang,Jiangting Wang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Jian Zhang,Kunpeng Jiang,Aibing Yu
In this work, to reduce the “dead volume” due to the accumulation of synthesized products, the foam-structured NiCo 2 S 4 (FSNCS) with a specific surface area of 25.4 m 2 g − 1 was successfully synthesized by using well-dispersed SiO 2 nanospheres as the framework. The FSNCS exhibited 559.3 C g − 1 at a current density of 1 A g − 1 , which was 173.3 C g − 1 higher than the performance of the NCS synthesized without the addition of SiO 2 . Additionally, a hybrid supercapacitor is successfully assembled with FSNCS as the positive electrode and active carbon (AC) as the negative electrode. The FSNCS//AC displays maximum specific energy of 28.8 Wh kg −1 at a specific power of 375.0 W kg −1 , together with good cyclic life with 88.9% capacity retention over 5000 cycles at 8 A g − 1 . It is worth noting that the hybrid supercapacitor can provide strong power for the operation of the motor fan. The simple structure design provides an innovative and effective way to develop high-performance energy storage devices.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ruosong Li,Li Ding,Qiang Gao,Hongming Zhang,Dan Zeng,Biao Zhao,Bingbing Fan,Rui Zhang
Integration of a foam structure into a shielding material not only reduces its mass density but also enhances its electromagnetic interference (EMI) shielding performance. In this study, poly(vinylidene fluoride) (PVDF) composite films and foams consisting of carbon nanotubes (CNTs) and bulk Ti 3 C 2 T x MXenes were fabricated. Prominent anisotropy with high in-plane electrical conductivity ( σ ∥ ) and low through-plane electrical conductivity ( σ ⊥ ) was achieved (e.g., σ ∥ = 17.02 S/m and σ ⊥ = 0.42 S/m with 1 wt% MXenes) in the composite films due to the aligned structure of the MXenes in the PVDF matrix. With CO 2 -assisted foaming, the intercalation of PVDF chains and cell-induced biaxial stretch facilitated reorganized orientation and delamination of the MXenes. Consequently, σ ∥ decreased and σ ⊥ increased, and exhibiting an isotropic feature. Furthermore, the integration of the foam structure resulted in an increased σ ⊥ , which improved the EMI shielding effectiveness (EMI SE) to 65.1 dB at a MXene content of 12 wt%, owing to enhanced multi-reflections, dielectric loss and conduction loss. Moreover, the shielding effectiveness coming from reflection was reduced to lower than 3 dB due to the decrease in σ ∥ and destructive interference in the composite foam, thus leading to an absorption-dominated mechanism. Additionally, the prepared composite foams exhibited outstanding thermal conductivity and mechanical strength, enabling them to be used as lightweight and robust EMI shielding materials that could transform EM wave energy into Joule heat.
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
ADVANCED ENGINEERING MATERIALS
·
2022
·Vol. 24
·期 3
·2101134
·
IF 4.122
Shuai Zhang,Xuetao Shi,Zhenyun Miao,Haibin Zhang,Xin Zhao,Kai Wang,Jianbin Qin,Guangcheng Zhang
This work proposes a facile fabrication strategy of polyurethane (TPU) tissue-engineering scaffold with hierarchical structure, designed by combination of the fused deposition modeling (FDM) 3D printing and supercritical microcellular foaming by carbon dioxide (CO 2 ). Further surface modification of TPU scaffold with graphene oxide (GO) was carried out by in situ polymerization of polydopamine (PDA) to ensure stable loading of GO with antibacterial properties. The influence of 3D-printing temperature and speed on the microcellular cell morphology of TPU scaffold was investigated and optimized. The microcellular foaming and expansion process was indicated to compensate mechanical loss because of the gaps of stacking layers by FDM printing, and the reported tensile strength of 28 MPa matched well with that of natural cartilage tissue constructs. More interesting, the formation of interconnected open pores on the surface of foamed TPU scaffold shows much more enhanced cell adhesion because of the bigger specific surface area of microcellular structure. Similarly, the foamed TPU scaffold exhibits good absorption of GO nanosheets by the synthesized PDA on the surface and antibacterial properties, compared with the unfoamed TPU scaffold. This work offers a strategy for designing and manufacturing polymer tissue-engineering scaffold with hierarchical structure and good antibacterial property.
研究领域:
生物医学工程
·
组织工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Ruosong Li,Qiang Gao,Hongna Xing,Yangzhe Su,Hongming Zhang,Dan Zeng,Bingbing Fan,Biao Zhao
Polymer composites receive attentions for protecting from electromagnetic (EM) pollution. However, their EM wave (EMW) attenuation mechanism primarily results from reflection rather than absorption. Herein, we prepared poly(vinylidene fluoride)/cobalt (Co)/MXene composite foams that exhibited applicable impedance matching, enhanced EMW absorption and high-performance thermal conduction properties. With CO 2 -assisted foaming, a uniform foam structure was integrated into the polymer composites, and meanwhile, the introduced MXenes were partially oxidized and transformed into TiO 2 and amorphous carbon . The formed TiO 2 not only provided extra heterogeneous interfaces and capacitor-like structures in favor of dielectric polarization but also reduced the excessive electrical conductivity of the pristine MXenes to favor impedance matching. Accordingly, the EMW absorbing performance of the composite foam was enhanced with a minimum reflection loss of −45.6 dB at 4 mm when the filler content was only 12 wt% (6 wt% MXene and 6 wt% Co). Additionally, the synergism between the foam structure and TiO 2 nanocrystals resulted in improved thermal conductivity , ranging from 1.28 W/(m·K) to 1.36 W/(m·K), which were 2–6 times higher than that in the solid composite films . This study provided new insights into the simultaneously enhanced EMW absorption and dissipating heat ability in polymer composite foams with a low percolation threshold .
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 45
·10654-10663
·
IF 5.066
Longhui Zheng,Guozheng Liang,Aijuan Gu,Li Yuan,Qingbao Guan
High loading of ceramics has been the biggest shortcoming of fabricating high-k ceramic/polymer composites. Herein, unique pure barium titanate (BT) foams with three-dimensional interconnecting foam channels, coded as BTFs, were synthesized using a polymer foam replication method, and the BT content of foams is adjustable. In addition, various loadings of BTF were embodied into cyanate ester (CE) resin to develop a new kind of high-k composite. The spatial structure and content of BTF on the thermal and dielectric properties of BTF/CE composites were systematically researched, and compared with those of traditional composites based on commercial BT powders and ground BTF powders (BTFp), respectively. The results show that BTF/CE composites exhibit a much higher dielectric constant at very low concentrations of BTF than those of BT/CE and BTFp/CE composites. Typically, when the BTF content is as low as 33.5 vol%, the dielectric constant of the resultant BTF6(1200)/CE composite reaches 141.3 (100 Hz), about 8.4 and 14.1 times of those of traditional BT/CE and BTFp/CE composites, respectively; in fact, the BTF6(1200)/CE composite has the highest dielectric constant among non-semiconductive ceramic/polymer composites reported to date; meanwhile the dielectric loss of BTF6(1200)/CE is only about 0.276. The nature behind the excellent dielectric properties of BTF/CE composites was intensively discussed and proven to be attributed to the unique three-dimensional foam structure of BTF in CE resin. This study establishes a new method of preparing novel foam ceramics with three-dimensional interconnecting foam channels and a pure high-k ceramic skeleton as well as high-k ceramic/polymer composites with good processing characteristics at a very low loading of ceramics.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 48
·1906365
·
IF 15.621
Zhe Zhao,Zhiwei Zhang,Yuting Zhao,Jinrun Liu,Chang Liu,Zhijie Wang,Gengfeng Zheng,Gaoshan Huang,Yongfeng Mei
Integration of metal–organic frameworks on deformation tolerant substrates exhibits a promising prospect in flexible electrode applications. A straightforward synthesis utilizing atomic layer deposition pretreating to induce the growth of a zeolitic imidazolate framework-67 (ZIF-67) layer on carbon foam (CF), which maintains high ZIF-67 loading with a hierarchically porous structure and large surface area of 453 m 2 g −1 is presented. With a subsequent pyrolysis process, three-dimensional composite structures are obtained with Co, N codoped carbon spheres attached firmly on the CF framework, and CF bridges the individual carbon spheres to construct a conductive pathway. The composites are used as a flexible electrode for hydrogen production both in acid and alkaline electrolytes. The advances in the composite structure, such as the hierarchically porous structure, large surface area, and high loading of active material, lead to excellent electrochemical performance in terms of low overpotential of 142 mV and low Tafel slope of 73 mV dec −1 in 0.5 m H 2 SO 4 . Most importantly, the composite structure with outstanding flexible property shows good catalytic performance under remarkable deformation, and after 100 repeated compression–recovery cycles, the performance degrades slightly. This work provides a new design of flexible electrode, which is promising for the hydrogen production industry.
研究领域:
材料科学
·
能源化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Jianfeng Ma,Yazhuo Shang,Changjun Peng,Honglai Liu,Shuzhen Zheng,Yanwei Wang,Shuai Qi,Qianping Ran
In this work, four types of comb-like dispersants and one linear dispersant were synthesized to explore the effect of dispersant structure on the bubble structure in water solution and mortar system for the first time. Dispersants were modified with different adsorption groups (i.e., carboxylic acid , phosphate ester, and sulfonic groups). Polymer structures were identified using gel permeation chromatography and infrared spectroscopy . Surface tension test indicated that the comb-like dispersants exhibited lower surface tension than that of the linear dispersants (NSF-2), thereby demonstrating that the polycarboxylate superplasticizer (PCE) solutions possessed high surface activity. The analysis of the foamability and foam stability of the comb-like and linear dispersants were comprehensively investigated at different concentrations. Comb-like dispersants possessed higher foam height and better foamability performance than those of the linear dispersants. The bubbles of the dispersant PCE-3 were smaller in terms of the mean area and possessed higher number of bubbles than those of the other dispersants, which may be essential in reducing the viscosity of the slurry. A similar result was also obtained in the mortar system tested using the AVA instrument for PCE-3 and NSF-2. Adsorption and rheological behavior test indicated that comb-like dispersant PCE-3 is the most effective in reducing the viscosity of the slurry among all the dispersants tested. This result is consistent with that of the foamability experiment.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Naila Arshad,Muhammad Sultan Irshad,Muneerah Alomar,Junyang Tao,Xianbao Wang,Guo Zhenzhen,M. A. K. Shah,M. Sohail Asghar,Uzma Ghazanfar,Ho Xuan Nang,Zhengbiao Ouyang,Naveed Mushtaq,Van-Duong Dao,Jinming Guo,Hao Wang
Interfacial solar-driven evaporation systems are eco-friendly and promising approaches to produce freshwater and energy. However, the salt accumulation, intricate fabrication process, low evaporation rates, and condensate yields due to environmental stress limit its further practical applications. Herein, an ingenious polyelectrolyte strategy is proposed to effectively control salt accumulation and achieve higher condensate yields through remote and lightweight condensing structures. By sequentially adhering LiNi 0.8 Co 0.15 Al 0.05 O 2-δ (NCAL) and selectively modifying polystyrene sodium sulfonate (PSS) on a black polyvinyl alcohol sponge, a three-dimensional (3D) porous foam structure is conveniently constructed (NCAL@PBS), which features a Donnan exclusion with efficient photothermal conversion and salt-resistance with balanced water supply. The efficient evaporation rate of optimized NCAL@PBS exhibits 2.80 kg m −2 h −1 under one solar irradiation due to non-radiative relaxation behavior achieved via oxygen vacancy defects (13%) in the NCAL structure, and low evaporation enthalpy (1621 J g −1 ), guaranteeing stable and efficient evaporation in complicated environments. The NCAL demonstrates nearly 100% antibacterial efficiency against S. aureus under one sun solar irradiation, attributed to photothermal-induced hyperthermia that damages bacterial cell walls. This work introduces a novel strategy for promoting the water production rate, intelligence, and industrial application of solar-driven interfacial evaporators.
研究领域:
环境科学
·
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2022
·Vol. 35
·期 6
·965-976
·
IF 1.09
Bi Cheng,Song Shu-xiang,Li Hai-sheng,Peng Hui-ling,Li Quan-fu
A novel electrochemical non-enzymatic glucose sensor based on three-dimensional Au/MXene nanocomposites was developed. MXenes were prepared using the mild etched method, and the porous foam of Au nanoparticles was combined with the MXene by means of in situ synthesis. By controlling the mass of MXene in the synthesis process, porous foam with Au nanoparticles was obtained. The three-dimensional foam structure of nanoparticles was confirmed by scanning electron microscopy. Cyclic voltammetry and electrochemical impedance spectroscopy were used to study the electrochemical performance of the Au/MXene nanocomposites. The Au/MXene nanocomposites acted as a fast redox probe for non-enzymatic glucose oxidation and showed good performance, including a high sensitivity of 22.45 µA · (mmol/L) −1 ·cm −1 and a wide linear range of 1 — 12 mmol/L. Studies have shown that MXene as a catalyst-supported material is beneficial to enhance the conductivity of electrons and increase the loading rate of the catalyst materials. The foam structure with Au nanoparticles can provide a larger surface area, increase the contact area with the molecule in the catalytic reaction, and enhance the electrochemical reaction signal. In summary, this study shows that Au/MXene nanoparticles have the potential to be used in non-enzymatic glucose sensors.
研究领域:
材料科学
·
生物医学工程
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）