COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 5
·505-516
·
IF 2.4
Zeng Jiaxuan,Chen Xi,Hu Mengyue,Zheng Kang,Zhang Xian,Tian Xingyou
Traditional single-function composite materials cannot meet the developing requirements in modern electronics. To build a three-dimensional (3D) skeleton is an efficient solution for multifunctional composites. However, it is a challenge for polymeric composites to provide thermal conductivity and electromagnetic shielding while maintaining good mechanical properties. Herein, we propose an oriented 3D hexagonal boron nitride (h-BN)/multi-walled carbon nanotube (MWCNT) skeleton structure with thermal conduction and electromagnetic shielding pathways by using ice template and carbonization method, in which the h-BN was connected with MWCNT and cellulose nanofiber (CNF), and the hydrolyzedmethyltrimethoxy silane (MTMS) was added to reinforce the structure. When MWCNT is 1.5 wt% and h-BN is 5.7 wt%, the electromagnetic shielding efficiency (EMI SE) reaches 48 dB, the absorption parameter (A) is more than 50%, and the out-of-plane thermal conductivity (TC) is 1.17 W/m·K. Compared with the randomly distributed BN/MWCNT composite at same filling rate, the electromagnetic shielding of 3D BN/MWCNT skeleton structure is 639.6% high than that of randomly distributed BN/MWCNT composite, and the thermal conductivity increased by 290%. Dynamic mechanical analysis (DMA) results indicated that the storage modulus increased by 48%, and Tg shifted 10 ℃ higher than pure epoxy, which enhances the mechanical properties of the composites. This study provides a valuable guidance for preparing composite with high thermal conductivities, high mechanical properties and satisfactory EMI SE, which showed great potential as the next-generation high-performance EMI shielding materials.
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
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Sathish Reddy,Ran Du,Lixing Kang,Nannan Mao,Jin Zhang
Preparation of electrocatalysts with high activity and low cost are essential for mass production of hydrogen. However, preparation of such catalyst are still highly challenging thus far. In this paper, we focus on preparation of a three- dimensional CNTs aerogel/MoS x catalyst by using solvothermal process. The MoS x material has been successfully combined with three- dimensional CNTs aerogel and creates a sufficient active site exposure as well as 3D conductive networks for fast charge transport. Due to this the catalyst exhibited high activity for HER with a small onset over potential of ∼150 mV, a Tafel slope of 62 mV dec −1 , and an exchange current density of 6.4 mA cm −2 . The catalysts also show excellent stability during long-term 1000 cycles and electrolysis confirm the durability of the catalyst. The enhanced performance is attributed to synergistic effects of CNTs aerogel and MoSx, which enhance the activities for both components for HER.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wentao Gan,Yaoxing Wang,Shaoliang Xiao,Runan Gao,Ying Shang,Yanjun Xie,Jiuqing Liu,Jian Li
The architecture of cellulose nanomaterials is definitized by random deposition and cannot change in response to shifting application requirements. Herein, we present a magnetic field-controlled cellulose film derived from wood that exhibits great magnetic properties and reliable tunability enabled by incorporated Fe3O4 nanoparticles and cellulose nanofibers (CNF) with a large length-diameter ratio. Fe3O4 nanoparticles are dispersed in suspensions of CNF so as to enhance the magnetic response. The plane magnetic CNF can be processed to form a three-dimensional (3D) flower-like structure along the magnetic induction line after applying an external magnet. Inspired by the fluidic transport in natural flowers, a bilayer structure was created using the 3D flower-like film as the solar energy receiver and natural wood as the water pathway in a solar-derived evaporation system. Compared with a planar cellulose film decorated with Fe3O4, the 3D structure design can greatly improve the evaporation rate from 1.19 to 1.39 kg m–2 h–1 and the efficiency from 76.9 to 90.6% under 1 sun. Finite element molding further reveals that the 3D structural top layer is beneficial for the formation of a gradient temperature profile and the improvement of the energy efficiency through the reduction of thermal radiation. The magnetically controlled fabrication represents a promising strategy for designing cellulose nanomaterials with a complicated structure and controllable topography, which has a wide spectrum of applications in energy storage devices and water treatment.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Mingxi Ren,Dong Cao,Wei Jiang,Kai Su,Limei Pan,Yuhang Jiang,Shanshan Yan,Tai Qiu,Meng Yang,Jian Yang,Chuanfang (John) Zhang
Hierarchical composites with good electrical conductivity and sufficient voids are in great demand for the high-performance storage of sodium ions but typically limited due to the complicated synthesis procedure. Here, we report on a facile wet-chemistry synthesis of Sb 2 S 3 nanoparticles onto highly crumpled Ti 3 C 2 T x nanosheets, which form three-dimensional (3D) architecture with good electrical conductivity. The homogeneously distributed Sb 2 S 3 nanoparticles suppress the restacking issue of the Ti 3 C 2 T x nanosheets, which creates rich voids for rapid electron/Na + transport and minimizes the volume expansion effect from Sb 2 S 3 upon repeated charging/discharging cycles. When used as a sodium-ion battery (SIB) anode, the composite shows a high capacity (329 mAh g −1 at 100 mA g −1 after 100 cycles) and good rate capability and cycling performance (215 mAh g −1 at 2 A g −1 and maintains 118 mAh g −1 after 500 cycles). We believe the metallic interconnected network and the 3D architecture synergistically result in a promoted sodium-ion storage performance. This work provides a simple strategy to construct MXene-based hybrids with a porous network structure for application fields, such as energy storage, photocatalysis, adsorption, and microwave absorption.
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
Journal of Materials Chemistry A
·
2018
·Vol. 7
·期 1
·172-187
·
IF 9.931
Wenyi Wang,Chengcheng Xie,Liuyong Zhu,Bojin Shan,Caini Liu,Fangyan Cui
Graphene-based separation membranes exhibit great potential for the application of wastewater purification, but it is difficult to achieve a balance between water flux and rejection. To overcome the “trade-off” effect between permeability and selectivity, a novel 3-dimensional graphene-based membrane with superior water flux was fabricated using a simple, viable and green method. In addition, electrocatalytic technology is coupled to the membrane separation process. Comprehensive characterization indicates that the TiO2 nanoparticles were successfully mounted on the moderately reduced graphene oxide (rGO) surface. By introducing oxygen-functionalized carbon nanotubes (oCNTs), the rGO-TiO2/oCNT membrane has more pronounced 3-dimensional water channels. More importantly, the rGO-TiO2/oCNT membrane acts as both a separation membrane and an anode to couple the membrane process to the electrocatalytic technique. The small-molecule contaminants that are difficult to remove by physical exclusion would be degraded when the matter passes through the channels with the electrocatalyst. The TiO2 nanoparticles act as both a nano-wedge to expand the water channels and an electrocatalyst to promote the degradation of the contaminants. The rGO-TiO2/oCNT membranes showed a removal rate up to 95% at a high liquid hourly space velocity of 88 h−1 under the applied electrocatalysis conditions, which is two times more than that obtained without the electrocatalyst. The rGO-TiO2/oCNT membrane could not only achieve a superior water flux (the maximum was 44.14 L m−2 h−1 bar−1) but also maintain excellent dye removal performance (>90%) via membrane process coupling electrocatalysis. The optimum component ratio of the rGO-TiO2/oCNT membrane was investigated, and it was found that 30% oCNT content accounts for a stable catalytic performance. The graphene-based membrane coupled electrocatalysis in this study would provide a new approach to break the bottleneck of the trade-off effect and inspire the design of a functional membrane.
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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Weidong Zhao,Yun Zhu,Litong Zhang,Yunlong Xie,Xiangrong Ye
Porous activated carbon (PAC) with three-dimensionally (3D) interconnected structure has been successfully synthesized using sucrose and potassium hydroxide as carbon source and pore-forming agent, respectively. On account of its hierarchically porous structure and high specific surface area (1615 m 2 g −1 ), the synthesized porous carbon displays a maximal specific capacitance of 119 F g −1 at 1 A g −1 and a capacitance retention rate of 81.2% after 5000 cycles at 20 A g −1 in 1 M TEABF 4 /AN electrolyte. It also exhibits a maximal specific capacitance of 178 F g −1 at 0.5 A g −1 and a capacitance retention rate of 88.9% after 10000 cycles at 16 A g −1 in 1 M Na 2 SO 4 electrolyte. Moreover, the fabricated symmetric supercapacitor reveals a high energy density , 16.52 W h Kg −1 in 1 M TEABF 4 /AN and 15.78 W h Kg −1 in 1 M Na 2 SO 4 . Such an excellent supercapacitive performance implies that the prepared activated carbon with 3D interconnected porous structure could be potentially used for high performance energy storage device.
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
Nano Research
·
2024
·
IF 9.5
Li Dongping,Wang Ping,Li Yuanyuan,Yong Zhenzhong,Wu Kunjie,Zhang Yan,Wang Jin,Hu Dongmei
Wireless communication technology is indispensable in our daily lives, but it also results in serious electromagnetic radiation pollution. Hence, developing smart electromagnetic interference shielding materials with adjustable electromagnetic wave (EMW) responses holds significant promise for future electromagnetic shielding devices. In this study, we propose an electromagnetic shielding switch (ESS) characterized by tunable electromagnetic shielding performance achieved by fabricating a three-dimensional (3D) carbon nanotube-based spacer fabric (CNT-SF) and modifying CNT-SF with chemical vapor deposition (CCNT-SF). The CCNT-SF displays direction-dependent electrical conductivity by manipulating the warp and weft density, measuring 128 S/m transversely and 447 S/m vertically. This characteristic allows the CCNT-SF to transmit or shield EMW by adjusting the angle of EMW incidence through fabric rotation, resulting in anisotropic electromagnetic shielding performance (33 dB transversely and 87 dB vertically). This feature enables switchable shielding with an on/off ratio of 2.64. Furthermore, the unique 3D structure confers excellent mechanical properties on the fabric, with compressive strength reaching 120 kPa. As a flexible, lightweight, and mechanically robust ESS, the CCNT-SF holds promising prospects for mitigating the challenges of increasingly severe and intricate electromagnetic environments.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Guangwei Shao,Wenlong Huang,Xin Zhang,Junjie Pan,Minghao Li,Hongjie Li,Renbiao Zhang,Bixia Sun,Zhihao Li,Qiusen He,Wenfeng Hu,Siyi Bi,Huiqi Shao,Jinhua Jiang,Nanliang Chen
The extremely cold environment restricts certain activities, making the preparation of a material with both heating and insulation functions a significant challenge. This study presents the large space warp-knitted composite fabric (LSWCF) as an electric heating inflatable material with a three-dimensional structure. It is designed and developed from three modes to mitigate heat loss. The top layer of LSWCF is combined with the electric heating film as the heating layer, showing high electric heating efficiency (577.33 °C/(W·cm–2)), high electrothermal conversion efficiency (95%), and excellent conductivity (12.5 S/cm). The bottom layer of LSWCF is coated with TiO2/WPU coatings as a thermal radiation layer. The inflated LSWCF retains a substantial volume of still air within its middle layer and exhibits low thermal conductivity (0.037 W·m–1·K–1), with resulting minimization of heat loss due to convection and conduction. LSWCF’s radiant coating, on the other hand, reduces heat loss through directed radiation. Contributed to the structural design, the LSWCF demonstrates an enhanced ability to generate heat at low temperatures (up to 35 °C at −20 °C, 980 W·m–2) compared to the existing literature. This study offers a novel strategy for the development of materials for use in extremely cold environments.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Gui-Mei Yang,Xing Chen,Jie Li,Zheng Guo,Jin-Huai Liu,Xing-Jiu Huang
Three-dimensional (3D) palladium (Pd) nanostructures (that is, nano-buds or nano-dendrites) are fabricated by bubble dynamic templated deposition of Pd onto a glassy carbon electrode (GCE). The morphology can be tailored by changing the precursor concentration and reaction time. Scanning electron microscopy images reveal that nano-buds or nano-dendrites consist of nanoparticles of 40–70 nm in diameter. The electrochemical reduction of oxygen is reported at such kinds of 3D nanostructure electrodes in aqueous solution. Data were collected using cyclic voltammetry. We demonstrate the Pd macroelectrode behavior of Pd nanostructure modified electrode by exploiting the diffusion model of macro-, micro-, and nano-architectures. In contrast to bare GCE, a significant positive shift and splitting of the oxygen reduction peak (vs Ag/AgCl/saturated KCl) at Pd nanostructure modified GCE was observed.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 33
·18902-18908
·
IF 3.049
Runying Dai,Xue Ma,Quan Xu,Limin Lu
In this study, gelatin-based microcapsules were first proposed as a carbon source for the synthesis of nitrogen-doped hierarchical porous carbon (N-HPC) via a facile one-pot high-temperature treatment. The morphologies of the microcapsules could be well controlled by adjusting the synthesis parameters; this ensured the repeatability of the calcined products. The as-prepared N-HPC possesses a favorable three-dimensional network structure and hierarchical porous structure. As a promising modified electrode, N-HPC displayed remarkably improved stability and sensitivity for lead ion (Pb2+) detection. Moreover, two factors are responsible for the good analytical performance: (i) the morphologies of the microcapsules are controllable and reproducible; this improves the detection stability; and (ii) the nitrogen atoms in the shells of the microcapsules can efficiently interact with Pb2+; this enhances the detection sensitivity. The influences of various experimental parameters, including the pH value of the supporting electrolyte, deposition potential and deposition time, on the stripping signal of Pb2+ were investigated. The method displayed a wide linear range of the Pb2+ concentration from 7 nM to 7000 nM with the detection limit of 1.44 nM under the optimized conditions. The modified electrode possessed high selectivity, which might be due to the high binding affinity of the NH2− groups to Pb2+. The developed method has been successfully applied to the detection of Pb2+ in actual water samples; this demonstrates that the N-HPC-based electrochemical sensors have prospective applications in the environmental monitoring of Pb2+.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Junjie Ding,Li Ma,Mengyu Gan,Wang Zhan,Chenglong Zhou,Deying Wei,Sichen Han,Jun Shen,Fei Xie,Xiujuan Zhong
Limited by unsatisfactory mass diffusion and complex fabrication procedures, nanoporous carbons (NPCs) don't perform well, served as catalyst supports. Herein, utilizing nitrogen-doped carbon nanotubes (NCNTs) as spacers of nitrogen-doped graphene-like carbon nanosheets (NGs), a 3D nanoarchitecture (Co@NCNT-NG-900) is fabricated via a facile and eco-friendly approach. Physical characterizations manifest that the in situ-formed NCNTs make for improving graphitic degree, NGs contribute to increasing the specific surface area and the level of N-doping, meanwhile, the spacers effects of NCNTs promote the formation of opened macropores , what's more, Co@NCNT-NG-900 mainly consists of three-dimensional macropores and oversized mesoporous (3D macro-/oversized mesoporous), unlike conventional NPCs. Benefiting from improved charge transfer rate, enhanced N-doping level and dominant 3D macro-/oversized mesoporous, Co@NCNT-NG-900 is evaluated as an ideal Pt support for methanol oxidation reaction (MOR) in acid and alkaline medium . This work provides a facile synthetic method for NPCs and sheds directive light into the research of efficient catalysts for MOR.
研究领域:
材料科学
·
电催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Yue Chen,Tong Wu,Guoliang Xing,Yichuan Kou,Boxun Li,Xinying Wang,Ming Gao,Lei Chen,Yaxin Wang,Jinghai Yang,Yang Liu,Yongjun Zhang,Dandan Wang
In this study, the three-dimensional (3D) flowerlike porous Fe3O4 microcrystals were prepared by a self-assembly approach with the assistance of ethylene glycol (EG). The generation mechanism of the 3D flowerlike Fe3O4 microcrystals was revealed through controlling the parameters of the hydrothermal reaction time, the molar mass of the urea, and the calcination temperature. The proposed 3D flowerlike Fe3O4 microcrystals exhibited superparamagnetic behaviors with high saturation magnetization (i.e., up to 73.1 emu·g–1) at room temperature. The Fe3O4–Au magnetic composites (MCs) were further prepared by a seed deposition process, and surface features were revealed by TEM, XRD, XPS, UV–vis, and SQUID techniques. Compared with the Fe3O4 microcrystals themselves, the Au (∼20 nm) covered Fe3O4 microcrystals provided efficient and recyclable catalytic performance (e.g., unprecedented high turnover frequency of 2.874 min–1) for 4-nitrophenol (4-NP). More importantly, the proposed Fe3O4–Au MCs could be used to reduce 4-NP for more than six cycles, elaborating that Fe3O4–Au MCs are promising catalysts in the field of environmental purification.
研究领域:
材料科学
·
环境科学
·
催化化学
✓ 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）