JOURNAL OF MATERIALS SCIENCE
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2024
·Vol. 59
·期 40
·19075-19087
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IF 3.5
Tong Yifan,Liu Linxiang,Chen Zehong,Zhong Linxin
Hydrophobic, elastic, and conductive (HEC) aerogels have significant potential in electronic devices. Herein, we propose a new method to fabricate an HEC aerogel with excellent mechanical and sensing performances from TEMPO-oxidized bacterial cellulose (O-BC) and conductive MXene nanosheets via directional freeze-drying and silanization modification. O-BC with a high aspect ratio can interweave with each other to form continuous layers, while MXene can induce a regular and flat structure and provide good conductivity. The silanization modification ensures high hydrophobicity and high elasticity, which can prevent the aerogel from structural collapse by avoiding adhesion among lamellae. The resulting aerogel can withstand compressive strain high up to 90% and long-term compression for 10,000 cycles at 50% strain due to the elastic and hydrophobic lamellar structure. It also offers a precise electrical response to stress signals in a broad detection range of 0–40 kPa and can accurately detect biological signals from humans. These structural and mechanical performance benefits make the HEC aerogel valuable in the field of pressure sensing.
研究领域:
材料科学
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电子工程
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Chenyang Cai,Yi Chen,Fulin Cheng,Zechang Wei,Wenbin Zhou,Yu Fu
Harvesting atmospheric water and converting it into electricity play vital roles in advancing next-generation energy conversion systems. However, the current water harvester systems suffer from a weak water capture ability and poor recyclability due to high diffusion barriers and low sorption kinetics, which significantly limit their practical application. Herein, we drew inspiration from the natural “Pump effect” observed in wood and successfully developed a dual “absorption–adsorption” networked MXene aerogel atmospheric water harvester (MAWH) through ice templating and confining LiCl processes, thereby serving multiple purposes of clean water production, passive dehumidification, and power generation. The MAWH benefits from the dual H-bond network of MXene and cellulose nanocrystals (absorption network) and the hygroscopic properties of lithium chloride (adsorption network). Furthermore, its aligned wood-like channel structure efficiently eliminates water nucleation near the 3D network, resulting in fast moisture absorption. The developed MAWH demonstrates a high moisture absorption ability of 3.12 g g–1 at 90% relative humidity (RH), featuring rapid vapor transport rates and durable cyclic performance. When compared with commercial desiccants such as the 4A molecular sieve and silica gel, the MAWH can reduce the RH from 80% to 20% within just 6 h. Most notably, our integrated MAWH-based water harvesting–power generation system achieves a high voltage of ∼0.12 V at 77% RH, showcasing its potential for practical application. These developed MAWHs are considered as high-performance atmospheric water harvesters in the water collection and power generation field.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Zheng Bo,Kexin Yi,Huachao Yang,Xinzheng Guo,Zhesong Huang,Zhouwei Zheng,Jianhua Yan,Kefa Cen,Kostya (Ken) Ostrikov
Ever-increasing mass loading of transition metal oxides (TMOs) yields high pseudocapacitance in laboratory electrochemical capacitors . However, their performance based on whole electrode mass is still far from industry standards. Highly-promising solution based on loading TMOs into 3D porous electrodes causes a yet unresolved challenge to find ways to achieve ultimate energy storage by atomically precisely loading less active material. Inspired by single-atom catalysis, we propose a new “ more from less but precise ” concept of homogeneously dispersing a common MnO 2 TMO via atomic sites to maximize atom redox reaction efficiency for industry-relevant pseudocapacitance. The concept is materialized by multifunctional MXene aerogel with super-hydrophilicity and surface functional groups, which provides 3D atomic nucleation sites to homogeneously load in-situ -formed, covalently-bonded MnO 2 nanosheets . The gravimetric capacitance of MnO 2 is largely enhanced, yielding superior pseudocapacitance of >400 F/g at > 5 mg/cm 2 that is typically achieved at 10 times lower loadings. Outstanding electrode areal capacitance is achieved using 2–3 times less MnO 2 mass, demonstrating industry-relevant pseudocapacitance almost twice higher than in state-of-the-art devices. MnO 2 /MXene//MXene asymmetric supercapacitor shows practically-high energy (~50.1 Wh/kg) and power (~10.0 kW/kg) densities, among the best MnO 2 pseudocapacitors . Capacitive-mechanism-controlled redox reactions, rarely achievable in diffusion-controlled porous pseudocapacitive electrodes, are revealed.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Guo-Yu Yang,Shao-Zhe Wang,Hong-Tai Sun,Xu-Ming Yao,Chuan-Bing Li,Yu-Jun Li,Jian-Jun Jiang
MXene aerogels with a porous microstructure are a promising electromagnetic interference (EMI) shielding material due to its low density and excellent electrical conductivity, which has attracted widespread attention. Compared with traditional EMI shielding materials that rely on reflection as the primary mechanism, MXene aerogels with absorption as the dominant mechanism have greater potential for development as a novel EMI shielding material because of its ability to reduce environmental contamination from reflected electromagnetic (EM) waves from materials. In this study, a novel Ti3C2Tx MXene/PEDOT:PSS hybrid aerogel was presented by freeze-drying and thermal annealing using few-layered Ti3C2Tx MXene and the conductive polymer poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS). PEDOT:PSS not only improved the gelling ability of Ti3C2Tx but also successfully established a conductive bridge between MXene nanosheets. The experimental results demonstrated that the hybrid aerogel exhibited an obvious porous microstructure, which was beneficial for the multiple scattering of EM waves within the materials. The EMI shielding effectiveness and specific shielding effectiveness reached up to 59 dB and 10,841 dB·cm2·g–1, respectively, while the SER/SET ratio value was only 0.05, indicating superior wave absorption performance. Furthermore, the good impedance matching, due to the electrical conductance loss and polarization loss effect of the composites, plays a critical role in their excellent wave absorption and EMI shielding performance. Therefore, this work provides a practical approach for designing and fabricating lightweight absorption-dominated EMI shielding materials.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Liheng Zhu,Boyang Zou,Naici Bing,Huaqing Xie,Wei Yu
The issues of inherent low thermal conductivity , slow heat transport rate and easy leakage are critical challenges for accelerating solar-thermal energy harvesting and storage for organic solid-liquid phase change materials (PCMs). Aerogel carriers with thermal conductivity enhancement based on ice temple methods show favorable potential for PCMs solar thermal applications. Comparing with disordered and unidirectional freezing, bidirectional freezing can assemble efficiently in multiple dimensions and result in long-range ordered structures. In this paper, bacterial cellulose/polyvinyl alcohol/MXene aerogels were constructed by bidirectional freezing. The anisotropic PCMs composites were from vacuum impregnation PEG into aerogel networks. By controlling crystallization and growth of ice crystals through the dual temperature gradients , the PCMs composites obtained enhanced heat transfer efficiency in horizontal and vertical directions. Bidirectional aligned PCMs with PDMS wedge angle of 0° and 20° exhibit high thermal conductivity of 0.716 W m −1 K −1 and 0.768 W m −1 K −1 , which were 184% higher than that of PEG , and photothermal conversion efficiency of 55.17% and 76.91%. Remarkably, the PCMs composites with a 20° PDMS wedge angle also exhibited a high PCM loading capacity (96.3%) and a high enthalpy (157.7 J/g). The results show that bidirectional anisotropic PCMs composites have excellent overall performance and are expected to improve solar thermal application.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Small Science
·
2021
·Vol. 1
·期 9
·2100021
·
IF 0
Xiangyu Meng,Yufeng Sun,Mengzhou Yu,Zhiyu Wang,Jieshan Qiu
Li metal batteries offer the ultimate choice of high-energy power source, but suffer the performance decay and safety risk originated from notorious dendrite problem and infinite volume change of Li metal anode. Herein, it is reported to strengthen the Li metal anode by ultralight but highly robust MXene aerogels (ULRMA) with build-in strain-resistant and molecular-level lithiophilic properties. A hydrogen-bonding crosslinking strategy is developed for rapidly assembling 2D MXene to ULRMA at ambient conditions with less sacrifice of intrinsic properties of MXene. The ULRMA with an ultralow density below 10 mg cm −3 are favorable to maximize the merit of Li metal in gravimetric energy density while offering exceptional stability of porous frameworks against mechanical strain of long-term Li plating/stripping. The lithiophilic architecture with high conductivity and hierarchical porosity further largely reduces the potential polarization and guides the pattern of Li deposition. Uptaking Li metal into ULRMA leads to a stable Li metal anode with an ultralong lifetime of 1600 h with a high-rate response up to 20 mA cm −2 and high coulombic efficiency. It yields a highly robust Li metal anode with high effectiveness in engineering stable Li-ion and Li–S batteries even paring with commercial LiFePO 4 or sulfur cathode without nanostructuring.
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
DOI
Nano Today
·
2024
·
IF 13.2
Yuan Yu,Menggang Li,Miao Sun,Zhaolin Yang,Yifan Liu,Senwei Hu,Jiazuo Zhou,Yudong Li,Haiyue Yang,Chengyu Wang
The exceptional potential of MXene aerogels for practical applications is impeded by the energy-intensive processing and insufficient mechanical stability. Inspired by natural bones, herein, we report the MXene@regenerated nanocellulose aerogel (MRCA) with strong mechanical performance via dual aerogel fabrication to achieve high-performance energy generation and storage. The MRCA achieves a gravimetric capacitance of 1271.16 F g −1 at 2 mA cm −2 , and the energy density of the eco-friendly symmetrical MRCA-based solid-state supercapacitor reaches 0.11 mWh cm −2 , positioning it as a top contender among most state-of-the-art MXene-based electrodes. Additionally, the MRCA exhibits a robust specific tensile strength of 68.35 MPa cm 3 g −1 , resembling bone-like resilience. Therefore, MRCA can swiftly generate an open-circuit voltage of 181.24 V. The instant high voltage of MRCA transforms into diverse signals, driving MRCA-SC to release energy for electric devices in practical scenarios, paving the way for future sustainable power systems.
研究领域:
材料科学
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能源工程
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仿生学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Bioresources and Bioproducts
·
2025
·
IF 13
Shuwei Tang,Lansheng Wei,Zhengguo Wu,Jiayao Weng,Jiwen Luo,Xiaoying Wang
Efficient cleanup of crude oil continues to be a global challenge owing to its inherent high viscosity, which makes it difficult to remove with conventional porous adsorbents. Here, a novel multifunctional aerogel was fabricated through directional freeze-drying, leveraging its photothermal properties and directional structure for the rapid cleanup of crude oil. The aerogel incorporates 2,2,6,6-tetramethyl-1-piperidinyloxy oxidized nanocellulose to enhance Ti 3 C 2 T x (MXene) to construct functional networks, MXene/gold nanoparticles (MX/AuNPs) as photothermal absorbers, and methyltrimethoxysilane for hydrophobic coatings. After 30 compression-release cycles at 90% strain, the strain retention of the aerogel is 85.7%, indicating its mechanical super-elasticity. The as-prepared aerogel showed durable hydrophobicity (145°), high oil/organic solvent absorption capacity (45.7–85.6 g/g), and efficient photothermal conversion, rapidly attaining and sustaining 76 °C. Interestingly, for viscous crude oil that cannot be absorbed for a long time, the aerogel completed the absorption within 10 s after illumination, demonstrating an improved absorption ability of viscous crude oil. Furthermore, the obtained aerogel successfully achieved controlled and rapid light-driven motion, as well as long-lasting photothermal sterilization performance. This work presents a feasible strategy for developing multifunctional composite aerogels, addressing the increasing demands in crude oil separation applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 7
·2101988
·
IF 17.521
Junjie Yang,Jianqiao Wang,Huiqin Li,Ze Wu,Youqiang Xing,Yunfei Chen,Lei Liu
In the design of electromagnetic (EM) wave absorbing materials, it is still a great challenge to optimize the relationship between the attenuation capability and impedance matching synergistically. Herein, a 3D porous MoS 2 /MXene hybrid aerogel architecture with conformal heterogeneous interface has been built by atomic layer deposition (ALD) based on specific porous templates to optimize the microwave absorption (MA) performance comprehensively. The original porous structure of pristine Ti 3 C 2 T x aerogel used as templates can be preserved well during ALD fabrication, which prolongs the reflection and scattering path and ameliorates the dielectric loss. Meanwhile, plenty of heterointerfaces between MoS 2 and Ti 3 C 2 T x have been fabricated based on conformally ALD-deposited MoS 2 with controlled thickness on the porous surfaces of the templates, which can effectively optimize the impedance matching and transform its response to EM waves from shielding into absorbing. Moreover, the interaction between the attenuation capability and impedance matching can also be modulated by the number of ALD cycle in MoS 2 fabrication. After optimization, MoS 2 /MXene hybrid aerogel obtained under 300 ALD cycles shows a minimum reflection loss of −61.65 dB at the thickness of 4.53 mm. In addition, its preferable lightweight, high surface area, mechanical, and hydrophobicity properties will also be conducive to further practical applications.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Kai Hu,Xiaobing Liu,Huifen Ma,Di Zhao,Junying Song,Huahui Zeng,Zhenqiang Zhang
A magnetic MXene aerogel (Fe 3 O 4 @MXene@PEI) was prepared by crosslinking amino modified MXene with polyethyleneimine using epichlorohydrin as a cross-linker. Adsorption properties of Fe 3 O 4 @MXene@PEI aerogel for phenolic acids were evaluated by adsorption kinetics and isotherms experiments, showing that the high adsorption affinity was governed by multilayer chemisorption process. An efficient MSPE/HPLC method was developed for the determination of phenolic acids with excellent selectivity, good linearity (0.025–5.0 μg mL −1 ), low LODs (0.007–0.017 μg mL −1 ), and satisfactory recoveries (80.0–120.0 %). Moreover, the antioxidant activity of the Fe 3 O 4 @MXene@PEI purified compounds was superior to that of the conventional method as demonstrated by the results of scavenging experiments on 2,2 -diphenyl-1-picrylhydrazyl radical scavenging assay. Finally, 65 organic acids were identified in the Fe 3 O 4 @MXene@PEI treated honeysuckle extracts by UHPLC-Q-Exactive Orbitrap MS/MS analysis. The proposed sorbent exhibits remarkable promise for the selective separation and purification of organic acids from herbal products.
研究领域:
分析化学
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植物化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Na Shi,Jiakun Wu,Xingyu Zhi,Nan Li,Zhining Wang
As a green and economical energy, nuclear power plays a significant role in the global energy supply. Uranium extraction from seawater is a highly promising strategy to utilize unconventional uranium resources and ensure the sustainability of the nuclear industry. However, the current uranium absorbents still suffer from long extraction time, low adsorption capacity, and poor selectivity. In this study, an amidoxime-functionalized cellulose nanofibers/MXene aerogel (MCA) with a three-dimensional porous structure was fabricated for efficient uranium extraction from seawater through electro-/physicochemical adsorption processes. The abundant porous structures and functional groups endowed the MCA with a high adsorption capacity of 515.46 mg/g in the physicochemical adsorption process. Furthermore, the MCA adsorbed 13.82 mg/g of uranium from natural seawater after 28 days with a superior selectivity for uranyl ions. Encouragingly, the uranium extraction performance was significantly boosted via the assistance of an electric field. By applying a voltage of 1.0 V, the MCA presented an improved extraction capacity of 1826.38 mg/g and accelerated adsorption kinetic. Meanwhile, the MCA electrode possessed good stability and high reusability of 84.30% after five adsorption–desorption cycles, which insured that MCA was a promising uranium adsorbent in long-term application. This work offers a universal paradigm for the design of highly efficient electro-adsorbents and also expands the scope of external field enhancement in the area of uranium extraction.
研究领域:
材料科学
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环境科学
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核能工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Wei Zhang,Hengrui Wang,Siyi Ji,Yongqian Shi,Jiefeng Gao,Long-Cheng Tang,Pingan Song
In today's digital era, electromagnetic radiation pollution and fire hazard stand as a dual-edged sword, not only diminishing the efficacy of sophisticated electronic devices but also threatening human health. As a result, the pursuit of advanced electromagnetic shielding materials with high flame retardancy has ascended to the forefront of research priorities, underscoring their crucial role in mitigating these risks. In this study, pyrrole polymerization was employed to obtain a modified PPy-MXene, which was used to construct flame retardant modified MXene aerogel composites by the "Concreting" method. It was found that peak heat release rate, the total heat release, peak CO₂ production rate, peak smoke production rate and total smoke release of the C 1 M 2 MT FRs were reduced by 67.7 %, 46.7 %, 71.4 %, 71.7 % and 77.3 %, respectively. Furthermore, the average electromagnetic interference shielding effectiveness of C 1 M 2 MT FRs in the X-band and K-band reached 67.3 dB and 91.4 dB, respectively. It was noted that CMMT FRs had the ultra-low reflectivity (as low as 0.14). Additionally, the mechanical durability and strength of the aerogel composites were obviously enhanced, with compressive stress increased by a factor of 3.2, in comparison with that of the CNF aerogel.
研究领域:
材料科学
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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）