CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiaxin Wu,Wenfei Ai,Kai Hou,Chaofan Zhang,Yue Long,Kai Song
Many organisms rely on a dynamic attachment mechanism to climb surfaces. Inspired by these organisms, researchers have developed soft climbing robots. Despite their rapid development in recent times, such robots have restricted application in complex environments, such as the lack of remote wireless actuation and attachment ability for climbing tilted or slippery surfaces. To address these issues, we report a light-driven dynamic adsorption/desorption soft suction cup inspired by rock-climbing fish ( Beaufortia kweichowensis ). Our suction cups utilize the volumetric change caused by changes in the gas–liquid phase in the inner chamber to generate suction and thrust. The repetitive changes in the gas–liquid phase, controlled by photothermal conversion, help achieve adsorption and desorption. We demonstrated that the suction cups based on negative pressure adsorption can easily help miniaturize soft robotic devices and adapt to multiple types of substrates, making our approach applicable to tilted or slippery surfaces. By integrating the soft suction cups for surface attachment by dynamic control and a shape memory alloy as a deformable body, we developed a soft climbing robot that can perform precise, facile, and programmed controlled climbing under different conditions via remote light manipulation. Four continuous and directional climbing sequences on tilted and slippery surfaces were demonstrated. The results are expected to help advance the application of light-driven soft robots on tilted or slippery surfaces
研究领域:
机器人学
·
仿生工程
·
智能材料
·
微纳系统
·
生物医学工程
✓ 已验证
DOI
高影响因子
Nano Energy
·
2016
·
IF 11.553
Zhaoqiang Li,Caixia Li,Xiaoli Ge,Jingyun Ma,Zhiwei Zhang,Qun Li,Chengxiang Wang,Longwei Yin
Reduced graphene oxide (RGO) wrapped metal-organic frameworks (MOFs) derived cobalt doped porous carbon polyhedrons synthesized via a carbonization process, are for the first time used for sulfur immobilizers (RGO/C–Co-S) as cathodes for high performance lithium-sulfur (Li–S) batteries. The RGO/C–Co–S cathode exhibits greatly improved electrochemical performance, showing excellent specific capacity of 949 mAh g −1 at 300th cycle at a current density 0.3 A g −1 , displaying enhanced rate capability with specific capacity of 772, 704 and 606 mAh g −1 at current density of 0.5, 1 and 2 A g −1 , respectively. The synergetic effect of MOFs-derived porous carbon, homogeneously distributed Co nanoparticles and RGO nanosheets simultaneously contributes to the confinement of sulfur species. The presence of abundant mesopores and micropores is conducive to immobilize large amounts of S species. The homogenously inlaid ultrafine Co nanoparticles can further immobilize sulfur by chemical interactions between Co and S/polysulfides. The RGO nanosheets tightly wrapped on carbon hosts act as barrier layers to prevent polysulfides from diffusing out of the matrix, further suppressing shuttle effect. The porous structure and the RGO can effectively alleviate the volume changes resulted from charge–discharge process. This design strategy can be inspiring for MOF-derived materials in energy storage applications .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
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电池技术
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2013
·Vol. 33
·期 8
·5044-5050
·
IF 2.404
Y.H. Xia,B.P. Zhang,C.X. Lu,L. Geng
In this paper, corrosion resistance of the Mg–4.0Zn–0.2Ca alloy was modified by micro-arc oxidation (MAO) process. The microstructure and phase constituents of MAO layer were characterized by SEM, XRD and X-ray photoelectron spectroscopy (XPS). The corrosion resistance of MAO treated Mg–4.0Zn–0.2Ca alloy in the simulated body fluid were characterized by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The microstructure results indicated that a kind of ceramic film was composed by MgO and MgF 2 was formed on the surface of Mg–4.0Zn–0.2Ca alloy after MAO treatment. The electrochemical test reveals that the corrosion resistance of MAO treated samples increase 1 order of magnitude. The mechanical intensity test showed that the MAO treated samples has suitable mechanical properties.
研究领域:
生物医学工程
·
材料科学
·
生物材料
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表面工程
·
腐蚀科学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Jing Lin,Lianshan Sun,Zhanyi Cao,Dongming Yin,Fei Liang,Yaoming Wu,Limin Wang
We describe our recent progress on a novel method to prepare Ti 1.4 V 0.6 Ni hydrogen storage alloy covered with nanostructured Co 3 O 4 by utilizing zelolitic imidazolate framework 67 (ZIF-67) as the template. Ti 1.4 V 0.6 Ni@C@Co 3 O 4 composite is prepared through a dopamine self-polymerization and a facile precipitation reaction with the subsequent thermal treatment. This specific composite structure combines the high conductivity of carbon together with the promising catalytic property of nanostructured Co 3 O 4 , therefore the enhanced electrochemical activity and stability are realized. As a result, Ti 1.4 V 0.6 Ni@C@Co 3 O 4 composite electrode possesses a capacity conservation rate of 56.1% after 300 charging/discharging cycles, remarkably larger than that of Ti 1.4 V 0.6 Ni (25.3%). Moreover, a study of the kinetics demonstrates that nanostructured Co 3 O 4 coating accelerates the charge-transfer reaction of the electrode. These results prove that coating with carbon and nanostructured Co 3 O 4 is a potential method for enhancing electrochemical hydrogen storage properties of hydrogen storage alloys.
研究领域:
材料科学
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电化学
·
能源存储
·
金属氢化物电池
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纳米材料
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Ying Zhang,Bo Fu,Kuixue Liu,Yupeng Zhang,Xu Li,Shanpeng Wen,Yu Chen,Shengping Ruan
FeCl 3 -NH 2 -MIL-125(Ti) with different FeCl 3 content was prepared and characterized by XRD , SEM and XPS . The humidity sensing properties of FeCl 3 -NH 2 -MIL-125(Ti) have been investigated. Compared with NH 2 -MIL-125(Ti), FeCl 3 -NH 2 -MIL-125(Ti) was more effective in the humidity sensing. The optimal mixing ratio was FeCl 3 -NH 2 -MIL-125(Ti) (8 wt%), which exhibited the best linearity. The impedance of FeCl 3 -NH 2 -MIL-125(Ti) (8 wt%) decreases by almost three orders of magnitude in the range of 11%-95% RH. The response time and recovery time of the humidity sensor by FeCl 3 -NH 2 -MIL-125(Ti) (8 wt%) are 11 s and 86 s respectively. These results indicate the potential application of FeCl 3 -NH 2 -MIL-125(Ti) in humidity sensors.
研究领域:
材料科学
·
传感器技术
·
纳米材料
·
功能材料
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
Manman Zhao,Xianli Huang,Dongmei Zhuang,Lei Sheng,Xin Xie,Min Cao,Junjie Pan,Haiyun Fan,Jianping He
Lithium metal possesses an ultra-high theoretical specific capacity (3860 mAh g −1 ), which is a promising anode material for next-generation high-energy-density rechargeable batteries. However, the practical application of lithium metal batteries is hindered by continuous generation of lithium dendrites during the cycling process. In this study, we have prepared composite current collector with porous nanospheres structure (Cu 3 N-NS/Cu) through a brand-new nitriding method. Because Cu 3 N-modified layer of Cu current collector improves the affinity of the electrode and lithium, the composite collector shows a better cyclic reversibility and flat lithium deposition morphology. And its porous nanospheres structure possesses higher specific surface area, which is beneficial for facilitating the diffusion of Li + and reducing the local current density of the electrode. Therefore, the Li/Cu half-cells with Cu 3 N-NS/Cu could be cycled stably for 220 cycles and the morphology of lithium deposited on Cu 3 N-NS/Cu composite current collector still remains a dendrite-free state even at 3 mAh cm −2 .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Ye Bian,Zhuolun Niu,Shijie Wang,Yue Pan,Li Zhang,Chun Chen
Particulate matter poses a serious threat to human health. In particular, exposure to submicron particles can result in more severe health effects as they can deposit more deeply into human tissues. Metal–organic framework (MOF)-based nanofiber filters are regarded as promising candidates for efficient particle control. In this study, ZIF-8@PAN nanofiber filters that were developed via an in situ growth strategy were selected for the filtration of submicron particles. The addition of ZIF-8 more effectively enhanced the filtration of particles with smaller sizes. For the most penetrating particle size of around 0.3 μm, the MOF-based nanofiber filter exhibited an 8.9% increase in filtration efficiency compared with that of the pure nanofiber filter. Meanwhile, for particles with large aerodynamic diameters (in the range of 0.7–1 μm, for example), the role of ZIF-8 was negligible. This work provides important insights into the filtration performance of MOF-based nanofiber filters in capturing submicron particles and may aid in designing nanofiber filters for efficient control of particles.
研究领域:
环境健康
·
材料科学
·
纳米技术
·
呼吸系统疾病
·
空气污染控制
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2019
·
IF 5.714
Ying-ying Zhang,Qin Liu,Cao Yang,Shi-chuan Wu,Jian-hua Cheng
In this paper, Fe 3 O 4 @MIL-68 (Al), a magnetic aluminum-based metal organic framework , was synthesized by a simple method and used as a novel and effective adsorbent for the removal of minocycline (MC) from aqueous solutions. The material was thoroughly characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and N 2 adsorption isotherms . The characterization results showed that the original structure of MIL-68(Al) was unchanged by the addition of Fe 3 O 4 nanoparticles , and that the obtained material had a strong magnetic response which also promoted its adsorption. Batch adsorption experiments were conducted by the varying the adsorption time, temperature, initial MC concentration and pH. The maximum adsorption amount of MC onto Fe 3 O 4 @MIL-68 (Al) was 248.05 mg g −1 ( t = 160 min, pH = 6, C o = 60 mg L −1 ), and the adsorption kinetics followed a pseudo-second-order model, and the adsorption isotherms conformed to the Freundlich equation . The adsorption mechanism of the magnetic metal organic framework materials were determined to involve complex interactions, including Al–N and Fe–N covalent bonds , hydrogen bonding , electrostatic adsorption, and π-π stacking. Combined the results indicate that Fe 3 O 4 @MIL-68 (Al) is an outstanding adsorbent for the removal of MC from water.
研究领域:
环境科学
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材料科学
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环境功能材料
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水污染控制
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吸附技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 31
·16168-16176
·
IF 7.443
Hao Wang,Fengxiang Yin,Biaohua Chen,Guoru Li
An ε-MnO2/metal–organic-framework (Fe) (i.e., ε-MnO2/MOF(Fe)) composite was synthesised by integrating ε-MnO2 and a MOF(Fe) support. The composite was characterised using X-ray diffraction, N2 adsorption–desorption, field emission scanning electron microscopy, transmission electron microscopy, elemental mapping, Fourier transform infrared spectroscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The ORR activity of the composite was evaluated by cyclic and linear sweep voltammetries in an alkaline electrolyte. The results revealed that in the ε-MnO2/MOF(Fe) composite, ε-MnO2 is in the form of nanorods, each with one end protruding and the other firmly anchored on the MOF(Fe) matrix with a high porosity and a high specific surface area. This unique structure of the composite is advantageous for oxygen diffusion and contact with ε-MnO2 during reactions, resulting in much better ORR activity and stability than those of ε-MnO2 in an alkaline electrolyte. The ε-MnO2/MOF(Fe)-catalysed ORR favours an apparent 4-electron transfer pathway in which oxygen was first reduced to hydroperoxide, which was further chemically decomposed into primarily OH− and O2.
研究领域:
材料化学
·
电化学
·
纳米催化
·
能源材料
·
无机功能材料
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2016
·Vol. 7
·期 1
·191-199
·
IF 5.287
Zhanwei Ma,Shengli Zhao,Xiaoping Pei,Xumao Xiong,Bin Hu
Three ceria nanocrystals with different morphologies (nanocubes, nanorods, and nanoparticles) were synthesized and used as supports to evaluate the support morphology-dependent ammonia synthesis activity in the structure-sensitive ammonia synthesis reaction. The Ru/r-CeO2 catalyst shows a higher catalytic reaction rate (3830 μmol g−1 h) than that of Ru/c-CeO2 (1289 μmol g−1 h) and Ru/p-CeO2 (529 μmol g−1 h) under the reaction conditions of 400 °C, 1 MPa, and 60 mL min−1. In addition, promoters (Cs, K, and Ba) can effectively enhance the catalytic activity of the catalysts such as 2Cs–Ru/r-CeO2 (14 266 μmol g−1 h) and 2K–Ru/r-CeO2 (11 227 μmol g−1 h). The effect of the morphology of the CeO2 support on the metal–support interaction and catalytic performance of the Ru/CeO2 catalysts can be correlated to the exposed crystal planes and surface composition/electronic structure of the CeO2 support with diverse morphologies.
研究领域:
催化化学
·
材料科学
·
表面科学
·
化学工程
·
无机化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Sheng Feng,Runbai Wang,Shanshan Feng,Zhihui Zhang,Shuguang Liu
In this study, a perfect UiO-66 was synthesized by adding benzoic acid in the precursor solution and activating it with chloroform after synthesis. The crystal morphology and material properties of the synthesized materials were investigated by X-ray powder diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, N 2 adsorption–desorption analysis, zeta potential, and thermogravimetric analyses. A typical anionic organic dye, Congo red (CR), was used as the target contaminant to examine the adsorption properties of a series of UiO-66. The acid-promoted and activated UiO-66 had a more regular octahedral structure, high-surface area of 905–1,230 m 2 /g, and more positive zeta potential (hydrogen ion), which might explained the greatly enhanced adsorption of CR dye. The effect of several influential parameters such as adsorbent dosage, solution pH, initial dye concentration, temperature, and contact time was well studied and optimized by using batch adsorption study. Moreover, mechanisms with kinetic, isotherm, and thermodynamics were researched in detail. The acid-promoted and activated UiO-66 could be regenerated by a simple N, N-dimethylformamide -washing method and exhibited stable and high reusability over five cycles. Overall, the acid-promoted and activated UiO-66 was an excellent candidate for wastewater treatment due to a simple synthesis procedure, high efficiency, reusability, and stability in the aqueous phase.
研究领域:
材料科学
·
环境化学
·
纳米材料
·
污染治理
·
吸附技术
✓ 已验证
DOI
高影响因子
NEW CARBON MATERIALS
·
2023
·
IF 5.7
Fang-yu Tao,Dan Xie,Wan-Yue Diao,Chang Liu,Hai-Zhu Sun,Wen-Liang Li,Jing-Ping Zhang,Xing-Long Wu
We report the fabrication of a lithiophilic Ti 3 C 2 T x MXene-modified carbon foam (Ti 3 C 2 T x -MX@CF) for the production of highly-stable LMBs that regulates Li nucleation behavior and reduces the volume change of a lithium metal anode (LMA). The 3D CF skeleton with a high specific surface area not only reduces the local current density to avoiding concentrated polarization, but also provides enough space to absorb the volume expansion during cycling. The excellent lithiophilicity of Ti 3 C 2 T x -MX produced by its abundant functional groups reduces the Li nucleation overpotential, guides uniform Li deposition without the formation of Li dendrites, and maintains a stable SEI on the anode surface. Consequently, a Li infiltrated Ti 3 C 2 T x -MX@CF symmetrical cell has an excellent cycling stability for more than 2 400 h with a low overpotential of 9 mV at a current density of 4 mA cm -2 and has a capacity of 1 mA h cm -2 . Furthermore, a Li- Ti 3 C 2 T x -MX@C||NCM111 full cell has a capacity of 129.6 mA h g -1 even after 330 cycles at 1 C, demonstrating the advantage of this method in constructing stable LMAs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）