COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xiaoyin Cao,Lijuan Yang,Jie Cui,Qibiao Feng,Chengjun Wang,Zhaoqi Zhu,Hanxue Sun,Jiyan Li,Weidong Liang,An Li
The fabrication of composite phase change material (CPCM) with splendid light-to-thermal conversion efficiency and enhanced thermal conductivity is of significance for solar energy storage and transition. Hence, we report the creation of a novel CPCM prepared by impregnating 1-hexadecanamine (HDA) into nickel foam (NF) bearing with carbon nanotubes (CNTs) nanoarray via simple vacuum impregnation for photothermal conversion. The NF bearing with CNTs nanoarray employed in this study show outstanding light absorption of higher than 97% originated from its vertical aligned CNTs nanoarray which makes it possible for trapping the light to the most extent. Moreover, the metal nature of NF coupled with the carbon nature of CNTs nanoarray endow it excellent thermal conductivity, e.g. the thermal conductivity of CPCM is improved by 46.3% compared to that of the pure HDA. Thanks to the high latent heat of HDA (240 J/g), the latent heat of the CPCM are measured to be 132.2 J/g. In addition, it shows excellent thermal stability, e.g. the latent heat of the CPCM remains nearly unchanged after 50 times of melting/freezing cycles. Beneficial from their outstanding light absorption, excellent thermal conductivity and high latent heat, the as-prepared CPCM is an ideal platform solar energy harvesting , storage and transition. Under 1sun irradiation, the light-to-thermal conversion efficiency of the CPCM was measured to be 80.10%. Moreover, we detected the temperature-time curve of the CPCM under 30 V voltage, the result show that the CPCM also has great potential in the electro-to-thermal conversion application.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Dongdong Fan,Meihua Hu,Songyuan Li,Pinghua Chen,Hualin Jiang,Xinman Tu,Xibao Li,Xubiao Luo
The efficient activation of peroxymonosulfate for degrading emerging contaminants has become a focal point in recent decades, emphasizing the development of novel materials and efficient strategies for high-performance degradation. This study explores a spatial confinement strategy, where TiO 2 is confined inside carbon nanotubes with Co 3 O 4 loading outside, is performed to prepare the nano-confined composite TiO 2 -in-CNT/Co 3 O 4 . Norfloxacin is chosen as the primary target pollutant, revealing a degradation rate exceeding 97 % within 30 min. The non-radical 1 O 2 species were confirmed to be generated in nano-confined catalyst, but not observed in the control non-confined catalyst. Additionally, the quantity of original radical active species significantly increases in nano-confined catalyst compared to non-confined catalyst. TiO 2 -in-CNT/Co 3 O 4 has excellent reusability and application universality. Wonderful stability is observed in real water and anti-ion interference experiments, highlighting its robust stability. Experimental and DFT calculation results also demonstrate that the spatial confinement strategy prevents nanoparticle aggregation, accelerates electron transfer efficiency, and promotes the cycling of Co 2+ /Co 3+ electron pairs. This work provides insights into the regulation of confined effects in activating PMS and offers a feasible strategy for the synergistic activation of PMS for water environment remediation through a radical and non-radical mixed mechanism.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kexuan Hu,Yan Xu,Limei Pan,Qian Li,Yang Wang,Quan Li,Jian Yang
Ti 3 CNT x /Ti n O 2n-1 foam and Ti 3 CNT x /CNTs/Ti n O 2n-1 foam were prepared by hydrochloric acid (HCl) induced self-assembly and freeze-drying, during which oxygen-vacancies-rich Ti n O 2n-1 quantum dots in situ grown on Ti 3 CNT x nanoflakes as a result of their slight and spontaneous oxidation . The well-developed pore structure , abundant interfaces, unique dangling bonds, defects and terminated groups on highly conductive Ti 3 CNT x nanoflakes, as well as the oxygen vacancies in Ti n O 2n-1 quantum dots render the foams with superior impedance matching, intensive multiple reflection and dielectric loss . By immersing the foams into molten paraffin (absorber content: 4.2 wt%), excellent microwave absorption (MA) properties were achieved: an effective absorption bandwidth (EAB) of 5.2 GHz (1.55 mm) and a reflection loss (RL) of −81.3 dB (1.85 mm) for Ti 3 CNT x /Ti n O 2n-1 foam, and an EAB of 6.4 GHz and a RL of −54.3 dB (1.85 mm) for Ti 3 CNT x /CNTs/Ti n O 2n-1 foam (15 wt% CNTs). Moderate addition of CNTs enhanced the conduction loss and polarization loss, leading to a larger EAB. When adjusting the thickness (1.2–5 mm), the EAB of Ti 3 CNT x /Ti n O 2n-1 foam (14.7 GHz) and Ti 3 CNT x /CNTs/Ti n O 2n-1 foam (15.3 GHz) both covered the C, X and Ku band. This work offers a simple and facile method for constructing Ti 3 CNT x -based foams as excellent MA materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yi Wu,Jiyuan Li,Shanfeng Zhang,Shengpu Chang,Wanqi Sun,Peng Wang,Xia Huang
Conductive hydrogels typically encounter intrinsic trade-offs among sensitivity, mechanical robustness, and multifunctional integration. In this study, a block-structured hydrogel addresses these limitations by spatially segregating one-dimensional (1D) carbon nanotubes (CNTs) and two-dimensional (2D) MXene within a semi-interpenetrating polyacrylamide/sodium alginate (PAM/SA) network. To further enhance interfacial conductivity, MXene-rich regions are coated with poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), achieving a conductivity of 16.2 S m −1 . This bioinspired structure realizes strain-dependent and strain-independent conductive pathways while suppressing phase separation, enabling ultrahigh sensitivity (gauge factor = 36.6 at 600–800 % strain) and wide pressure detection (0.1–21.7 kPa). This multifunctional hydrogel-based sensor features motion monitoring, temperature sensing, and Morse code encryption capabilities. The hydrogel mitigates the stress-masking effect through a biomimetic modulus design and, in synergy with the SA/MXene components, effectively reduces inflammatory factor levels. Simultaneously, the three-dimensional conductive network enhances electrical signal transmission, facilitating the functional recovery of neural tissues and promoting sciatic nerve regeneration in mice. Furthermore, the integrated friction-based nanogenerator demonstrates efficient energy harvesting capabilities, achieving a peak power density of 3.2 W m −2 . By seamlessly integrating sensing, nerve regeneration, and energy autonomy, this conductive hydrogel establishes a pioneering “neuroskin” platform, enabling a closed-loop “sense-repair-power” interface for next-generation bioelectronic systems.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 5
·1165-1175
·
IF 2.5
Liu Shuling,Zhang Wei,An Yiming,Li Ying,Wang Jie,Wang Chao
The Si-based flexible electrodes attracted increasing research interests owing to the growing demand for high-performance flexible energy storage devices. Herein, a facile and smart self-assembly strategy is adopted to address huge volume expansion and particle aggregation issues of Si-based anodes, and a high-performance freestanding film anode (NC@Si/CNTs/N-rGO) is synthesized. The 3D-crosslinked porous graphene-CNTs networks offer abundant electric conductive pathways, high active sites, large internal space to accommodate the expansion of Si NPs, and facilitate Li + diffusion and insertion/extraction kinetics. The synergistic effect between the well-dispersed Si/NC nanoparticles and 3D porous networks significantly enhances electrochemical performance of Si NPs. The as-prepared NC@Si/CNTs/N-rGO electrode exhibits a high reversible specific capacity of 1089 mAh·g −1 at a charge–discharge current density of 1 A·g −1 after 500 cycles. Even at 2 A·g −1 , the electrode still exhibits an excellent reversible specific capacity of 606 mAh·g −1 after 300 cycles. These indicate that the NC@Si/CNTs/N-rGO is a promising candidate for high-performance flexible anode material in lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
先进电池技术
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高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2022
·
IF 4.291
Minghui Xie,Shuangxin Li,Xiaoming Qi,Zhangyi Chi,Luting Shen,Zahidul Islam,Yubing Dong
Wearable electronic gadgets have always been in great demand for multifunctional flexible strain sensors. However, developing a flexible strain sensor with excellent characteristics such as high sensitivity, wide sensing range, and excellent durability continues to be a significant challenge. On the one hand, the two-performance metrics of high sensitivity and wide sensing range are mutually exclusive, because the former requires significant structural changes under small strains, whereas the latter necessitates the preservation of morphological integrity under large deformations . On the other hand, the usage of flexible strain sensors is invariably accompanied by the destruction of the conductive network, rendering the device unusable for an extended period of time. Here, based on the unique strain related microcrack structure of the Ti 3 C 2 T x (MXene)/carbon nanotubes (CNTs) synergistic interaction and the shape memory property of ethylene vinyl acetate polymer (EVA), a MXene/CNTs/EVA fiber strain sensor was innovatively designed and prepared by swelling ultrasonic method. The results showed that the sensor combines a large strain sensing range (190%), high sensitivity (82.5), ultra-fast response speed (178.9 ms), and excellent durability and stability (> 10,000 cycles). What is even more exciting is that if the strain sensor is failure, it can be repaired by heating for 2 min or infrared irradiation for 5.4 s, and the mechanical and electrical properties of the repaired sensor can be restored to 92% and 94% of the original. In addition, this strain sensor can accurately monitor subtle and large movements of the human body (including elbow and finger bending, speaking, and mouth opening/closing), even if the damaged MXene/CNTs/EVA fiber strain sensor has been repaired. The self-repairing MXene/CNTs/EVA composites fiber-based shape memory matrix has excellent potential as a wearable strain sensor.
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高影响因子
BIOMATERIALS
·
2019
·
IF 10.273
Yuhan Chen,Xinzhu Liu,Shuliang Guo,Jun Cao,Jing Zhou,Jianli Zuo,Lijuan Bai
The present work described a novel sandwich-type electrochemical aptasensor for rapid and sensitive determination of Mycobacterium tuberculosis MPT64 antigen. Herein, a novel carbon nanocomposite composed of fullerene nanoparticles , nitrogen-doped carbon nanotubes and graphene oxide (C 60 NPs-N-CNTs/GO) was facilely synthesized for the first time, which not only possessed a large specific surface area and excellent conductivity , but also exhibited outstanding inherent electroactive property, and therefore served as nanocarrier and redox nanoprobe simultaneously. Gold nanoparticles (AuNPs) was then uniformly anchored onto the surface of such nanocomposite via Au–N bonds to bind with MPT64 antigen aptamer Ⅱ (MAA Ⅱ), forming the tracer label to realize generation and amplification of electrochemical signal. Additionally, conductive polyethyleneimine (PEI)-functionalized Fe-based metal-organic framework (P-MOF) was used as a sensing platform to absorb bimetallic core-shell Au–Pt nanoparticles ( [email protected] ), which could accelerate electron transfer and increase the immobilization of MPT64 antigen aptamer Ⅰ (MAA Ⅰ). After the typical sandwich-type protein-aptamer recognition, the inherent electroactivity of the tracer label was provoked by tetraoctylammonium bromide (TOAB), leading to a well-defined current response. Under the optimum condition, the proposed aptasensor showed a wide linear range for MPT64 detection from 1 fg/mL to 1 ng/mL with a limit of detection (LOD) as low as 0.33 fg/mL. More importantly, it was successfully used for MPT64 antigen detection in human serum, exhibiting a promising prospect for TB diagnosis in clinical practice.
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PubMed
高影响因子
POLYMER COMPOSITES
·
2024
·
IF 4.8
Xinyi Jing,Linggong Meng,Tong Liu,Xinming Ye,Shuai Yang,Zhichao He,Wensheng Wang,Jie Li,Yingchun Li
Achieving high thermal conductivity in composites with low filler content is a major challenge in current research. In this paper, polypropylene (PP) and polyamide 6 (PA6) were used as polymer matrix, and the hybrid thermal conductive filler, formed by hexagonal boron nitride (h-BN) and aminated carbon nanotubes (NH 2 -CNTs), was integrated into matrix for the fabrication of thermal conductive composites (PP/PA6/h-BN and PP/PA6/h-BN@CNTs) via two-step melt blending technology. The thermal conductive fillers were selectively distributed in a phase of the polymer matrix with a co-continuous structure, forming a thermal conductive path with a three-dimensional network structure. The results show that when the content of h-BN reaches 25 wt%, the thermal conductivity of the PP/PA6/h-BN and PP/PA6/h-BN@CNTs composites was 199% and 300% higher than that of PP/PA6, respectively. Through testing the volume resistivity of the composites, it was confirmed that PP/PA6/h-BN@CNTs composites maintain good electrical insulation. Both composites demonstrated remarkable thermal conductivity and outstanding electrical insulation. This research provides a facile way to prepare highly thermal conductivity polymer composites with excellent processing performances and electrical insulation. Highlights h-BN@CNTs hybrid fillers with sandwich structure were prepared. A two-step blending method was used to control the selective distribution of hybrid fillers in a phase of the polymer matrix with a co-continuous structure. The hybrid filler formed a thermal conductive path with a three-dimensional network structure in the collective. PP/PA6/h-BN@CNTs composites demonstrated remarkable thermal conductivity, outstanding electrical insulation and favorable processing performances.
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高影响因子
JOURNAL OF APPLIED PHYSICS
·
2018
·Vol. 124
·期 17
·
IF 2.176
Ye Xianzhu,Li Ming,Li Daoru,Li Bin,Zhang Yafei
The development of a material with high ampacity to allow current to flow through narrow channels is one of the most promising ways to address the progressive miniaturization and light weight of electronic devices. The efficient synergistic electron transmission by compounding 1D/2D carbon materials with a metal matrix via various methods in recent years has attracted great research interest due to their potential utilization in electronics. In this study, a copper (Cu) matrix with a 3D nitrogen (N) doped-multi-walled carbon nanotubes (MCNTs) interface with prominent physical features is reported and fabricated, involving the use of nano-self-assembly-heat-modification by adopting polyethyleneimine-nano-Cu and carboxyl MCNTs. Young's modulus was enhanced from 28.8 to 92.2 GPa due to a higher efficiency of stress transfer and interfacial adhesion, and the hardness fitted by Gauss distribution was increased by ∼69% (∼39.7 HRC). Toward the stability after a modification of vacuum reduction sintering, the initial oxidation temperature (T d ) was increased largely from 232 °C to 286 °C, and thermal conductivity was enhanced eminently from 358 to 548 W/(m K) due to more efficient electron/phonon motion. Moreover, synergistic electron transmission endowed the final Cu-N-CNTs with a higher ampacity (7.23–16.98 × 10 4 A cm −2 ), which could be further observed by the time-evolution of electrical resistivity under a constant current density. The improved physical features state that the assembled 3D N-CNTs interface possesses prominent characteristics and potential for directing the deep applications of 1D or 2D carbon materials in electronic science.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jingxuan Zhao,Hongxu Liu,Yuchao Qi,Ruijia Wang,Ziwei Lv,Yang Yu,Shulin Sun
With the rapid development of industry, the problem of water pollution has become increasingly serious. Though there are many separation materials available to solve this problem, how to separate multiple wastewater at the same time remains a challenge. Hydrogel coating is suitable for use in the field of oil–water separation, and chitosan (CS) is effective in removing anionic dyes. Therefore, the preparation of separation membranes with hydrogel coating containing CS and dopamine (DA) can effectively separate oil–water emulsion and anionic dye wastewater. In this paper, DA@CNTs/CS hydrogel coating was prepared by sequentially coating Cu 2+ , DA@CNTs, Cu 2+ and CS on the surface of polyvinylidene fluoride (PVDF) membrane by deposition of self-assembly, which enhanced the hydrophilicity of the membrane and made it highly underwater oleophobic and antifouling. The alkali treated PVDF membrane contained a large amount of –OH, Cu 2+ , which formed coordination bonds with –OH, CS, and DA and the hydrogel coating could be stably loaded on the membrane. In addition, the introduction of rigid CNTs effectively improved the performance of the modified membrane under extreme conditions such as high pH and high salt concentration. PVDF-DA@CNTs/CS membrane had an ideal pure water flux (PWF) of 1470 (L·m −2 ·h −1 ) and the separation efficiency of 99.7 % for anionic dye and 99.4 % for oil–water emulsion. The contaminant on the membrane surface can be quickly removed by washing with DI water. The overall performance of the membrane is also maintained at a very high level of long-term filtration of wastewater. In summary, this study provides a new approach to complex wastewater treatment technology.
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高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2020
·Vol. 305
·期 4
·1900835
·
IF 3.853
Yi Yang,Ling-yan Li,Bo Yin,Ming-bo Yang
Conductive composites based on polymers and conductive nanofillers are widely studied as a promising material. The rational design of 3D conductive networks in composites is crucial to improve their electrical conductivity and reduce the dosage of nanofillers. Herein, poly(vinylidene fluoride) (PVDF) and polystyrene (PS) bi-continuous structures with modified carbon nanotubes (CNTs) tailored to anchor at the interface are designed to achieve an ultralow electrical percolation threshold because of the formation of a thin interfacial conductive layer. In this work, the modification of CNTs with poly(methyl methacrylate) (PMMA), which contributes to the improvement of the compatibility between PVDF and CNTs, is effective to control the distribution of CNTs in composites. It promotes the migration of CNTs from the PS phase to the interface of PVDF and PS. Consequently, the interfacial conductive layer is formed at a low CNT content, and the electrical percolation threshold of PVDF/PS/CNTs-PMMA nanocomposites is only 0.07 vol%, having a great decrease of about 50% compared with that of PVDF/PS/CNTs nanocomposites. Thus, it is demonstrated that the distribution of CNTs can be tailored to anchor at the interface by proper chemical modification to form an interfacial conductive layer and a decrease of percolation threshold can also be achieved.
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高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Lin Wei,Yang Zhibin,Tao Jin-Gang-Lu,Zhao Qianqian,Liu Fuyu,Li Wanshan,Feng Renfei,Zhang Yu,Fu Xian-Zhu,Luo Jing-Li,Zhao Bin
Developing efficient and durable electrocatalysts for
alkaline
seawater hydrogen evolution remains challenging because of sluggish
water dissociation kinetics. Herein, we report a defect-rich d-p orbital-hybridized
Os/o-CNTs electrocatalyst ( dph -Os def /o-CNTs)
prepared by rapid room-temperature NaBH 4 reduction. The
partially oxidized CNT support anchors defective Os nanoclusters and
induces C–Os/C–O–Os electronic coupling, generating
electron-deficient Os sites with modulated 5d electronic structures.
In alkaline simulated seawater (1 M NaOH + 3.5 wt % NaCl), dph -Os def /o-CNTs requires only 91 mV to reach
100 mA cm –2 and exhibits a Tafel slope of 19 mV
dec –1 , with stable operation over 350 h and 10,000
CV cycles. In situ Raman spectroscopy, AIMD simulations, and DFT calculations
reveal that Os vacancies reorganize interfacial water into an ordered
H-bond network, promote O-down water adsorption, and reduce the water
dissociation barrier from 1.12 to 0.56 eV. Moreover, an Al | OH – | H 2 primary cell using dph -Os def /o-CNTs as the cathode delivers 1.41 V and 10.92
mW cm –2 , enabling simultaneous hydrogen generation
and electricity output.
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高影响因子
危险品化学品经营许可证（带存储）