CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Jiadong Li,Caiyun Liang,Chuanwei Lin,Yuna Wang,Yongjiu Liang,Dewen Dong
MXene-based aerogel has shown great application potential in electromagnetic interference (EMI) shielding because of its low density and low reflection efficiency. However, the fabrication of MXene-based aerogels for EMI shielding with exceptional elasticity, compressibility, and durability remains a challenge because of the limited mechanical property and oxidation behavior of MXene. Here, MXene/carboxymethylcellulose sodium composite aerogels were prepared by using unidirectional freezing combined with binary organosilane cross-linking. The composite aerogel with a MXene content of 90 % displayed an exceptional EMI shielding efficiency (45.8 dB) at a super low density (19.75 mg/cm 3 ), and the density-normalized shielding efficiency achieved a high level of 11,595 dB·cm 2 /g. The modification of organosilanes endowed the cross-linking network formed in the composite aerogel with great elasticity and compressibility. The organosilanes also helped the aerogel build a superhydrophobic surface, leading to a contact angle of 151.5°. Given the excellent superhydrophobicity and mechanical properties, the aerogel could maintain its EMI shielding performance after being dipped in water or compressed for 100 times. Furthermore, the aerogel prepared in this study possessed thermal insulation performance and piezoresistive feature. This study provides a convenient strategy to fabricate multifunctional MXene-based aerogels with low density, elasticity, and durability, which shows great application potential in the fields of EMI protection, thermal management, wearable devices, and smart sensors.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 37
·25545-25556
·
IF 10.7
Tairan Wang,Hengzhi Zhang,Shengwei Tang,Chunyang Jia
In the modern battlefield, the use of multi-spectral detection techniques that combine the use of infrared and radar bands is prevalent, making the survivability of high-value targets poor. Consequently, there is an urgent need to develop materials that can withstand multi-spectral detection. Here, a multifunctional aerogel composite of hyperbranched gel (HPY) and MXene (Ti3C2Tx) is proposed to simultaneously resist multi-spectral detection. The surface of the aerogel has aligned porous walls, which gives the aerogel excellent thermal insulation, with a surface temperature of only 45.2 °C after being kept on a hot platform at 200 °C for 420 min. Most importantly, the aerogel exhibits a double absorption peak with a minimum reflection loss of −55.05 dB at 4.26 GHz and −49.43 dB at 16.68 GHz. Most notably, the widest effective absorption bandwidth (EAB) reaches 8.1 GHz with a matched thickness of only 1.7 mm. The incorporation of HPY alters the internal pore size of the aerogel, thereby developing an internal thermal insulation structure. Furthermore, the parallel hollow walls on the surface of the aerogel permit electromagnetic waves to enter the interior, while the composite structure endows the aerogel with multiple electromagnetic wave loss mechanisms.
研究领域:
材料科学
·
国防技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Mingqi Ding,Wenjie Ma,Pengju Liu,Jingbo Yang,Keyu Lan,Dawei Xu
Aerogel with vertically aligned porous structure can effectively enhance sunlight absorption and continuously absorb seawater, which is ideal for solar-thermal desalination, but the oriented cell walls lead to rapid heat dissipation, reducing the evaporation efficiency. Herein, the multifunctional aerogels with enhanced thermal insulation property were fabricated through rational assembly of exfoliated Ti 3 C 2 T x nanosheets, polyvinyl alcohol (PVA) and cellulose nanofibrils (CNF). The MXene composite aerogel (MCA) possessed the multiscale structure with parallel PVA/Ti 3 C 2 T x cell walls served as the skeleton and cross-linked CNF filled in the aligned pores, which is responsible for the superior hydrophilicity, thermal insulation (56.54 mWm - 1 K - 1 ) and solar absorption (97.9 %), suggesting high solar-thermal evaporation efficiency. Consequently, under exposure to 10 h natural sunlight irradiation, the maximum evaporation rate and efficiency of MCA reached 1.13 kgm - 2 h - 1 and 82.93 %, respectively. Moreover, the swelling of polymers with dipped water causes the structure change and conductivity variation of MCA, which can monitor the changing humidity by the generation of water-induced electrical signal, showing great prospects in solar-thermal desalination and intelligent detection fields.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Liangliang Xu,He Chen,Pingyu Zheng,Haowen Zheng,Zhong Chen,Zonglin Liu,Pengyang Li,Xu Zhao,Qingyu Peng,Xiaodong He
Two-dimensional transition-metal carbides and nitrides (MXenes) show great potential in aerogel flexible piezoresistive sensors owing to their versatile surface chemistry, high carrier mobility, outstanding metallic conductivity, and adjustable interlayer spacing under applied stress. However, the pure MXene aerogel exhibits significant plastic deformation or brittle mechanical performance due to the weak interactions between the nanosheets. Herein, a series of MXene/polyimide/silver nanowire composite aerogels with aligned lamellar microstructure are fabricated by bidirectional freezing and annealing strategies. The introduction of polyimide (PI) and silver nanowires (AgNWs) significantly improves the mechanical properties of the MXene-based aerogel. The obtained lightweight composite aerogel shows superelasticity with large reversible compressibility, excellent stability, and outstanding fatigue resistance. Moreover, owing to the highly aligned lamellar microstructure of the composite aerogel and the excellent conductivity of MXene and AgNWs, the composite aerogel exhibits great sensing performance with high sensitivity (gauge factor ∼27.8) and ultralow detection limit (<0.6 Pa). Based on the MXene/PI/AgNW composite aerogels, a series of wearable sensor applications are demonstrated.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
2D Materials
·
2023
·Vol. 10
·期 2
·024007
·
IF 5.5
Mingtao Zhang,Meng Su,Yijing Qin,Chuntai Liu,Changyu Shen,Jun Ma,Xianhu Liu
The frequent oil spill accidents during oil exploration and transportation have caused large economic loss and catastrophic environmental disasters. Due to low cost and simplicity, adsorption and filtration materials are often chosen to deal with oil spills, but the outcomes are not satisfactory mainly because of the awfully high viscosity of crude oil. Herein a photothermal ultra-high molecular weight polyethylene/MXene composite aerogel with a high light absorption (99.97%) and water repellency (water contact angle >148°) is developed by thermally induced phase separation method. The composite aerogel endows durable hydrophobicity with which the water contact angle is more than 142° in acidic/alkaline environments, and the maximum absorption capacity of 81 g g−1. In addition, it exhibits an excellent photothermal performance, rising surface temperature to 70 °C within 60 s under 1 sun irradiation, that can drastically reduce the crude oil absorption time from 60 min to 60 s, saving 98% of absorption time and reaching a crude oil absorption capacity of 21 g g−1. More interestingly, the designed solar evaporation device with the obtained composite aerogel can achieve an evaporation rate of 1.15 kg m−2h−1 and evaporation efficiency of 74%. The designed composite aerogel opens a possible pathway for solar-powered crude oil adsorption applications.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Shize Fang,Xin Xu,Yu Wei,Fangcheng Qiu,Weixin Huang,Hong Jiang,Ning Zhang,Yufeng Song,Meng Gao,Hongbin Liu,Yang Liu,Bowen Cheng
Progress toward the advancement of environmentally friendly energy harvesting devices is critical for eco-environmental protection. There is an urgent need for developing energy harvesting devices from biobased materials. However, it is still a challenge to utilize biobased cellulose nanofiber (CNF) aerogels in triboelectric nanogenerators (TENGs) due to their poor mechanical properties, hydrophilicity, and weak polarization capability. Here, we demonstrate a facile strategy to fabricate a super-elastic, hydrophobic CNF/MXene composite aerogel for TENGs through fluorosilane crosslinking and a directional freeze-dried assembled structure. This aerogel can withstand up to 80% compressive strain, rebound to 95.33% of its original height, and exhibit hydrophobicity (water contact angle = 137.65°). In addition, the induction of MXene and the silane coupling agent endows the aerogel with enhanced electronegativity and charge density. These properties enable the CNF/MXene aerogel to harvest energy with an output voltage of 100 V and a short-circuit charge density of ∼900 nC cm−3, while maintaining stability for 1000 cycles. This aerogel holds great application potential in the field of self-powered sensing and raindrop energy harvesting.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Ruiwen Shu,Lijuan Nie,Zongli Wan
The fabrication of three-dimensional (3D) graphene-based composites with low filling ratio, strong absorption strength and wide absorption bandwidth remains a great challenge. In this work, nitrogen-doped reduced graphene oxide/Ti 3 C 2 T x (NRGO/MXene) composite aerogels were prepared by a facile hydrothermal method. The results of microscopic morphology analysis showed that the as-prepared NRGO/MXene composite aerogels had a unique 3D layered stacked porous network structure. Moreover, the obtained binary composite aerogels had low bulk density (11–13 mg/cm 3 ) and excellent compression recovery. Furthermore, the addition amount of MXene had great influence on the complex permittivity, impedance matching and microwave absorption properties. When the addition amount of MXene was 15 mg and the filing ratio was 10 wt%, the NRGO/MXene composite aerogel exhibited the best microwave absorption performance with the minimum reflection loss of −62.1 dB and a broad effective absorption bandwidth of 5 GHz. The practical application potential of NRGO/MXene composite aerogels was predicted by radar cross section simulation. In addition, the probable microwave absorption mechanism of NRGO/MXene composite aerogels were also elucidated. This work was expected to provide a reference for the fabrication of 3D graphene-based composites as lightweight, efficient and broadband microwave absorbers.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2023
·
IF 6.1
Yuanyuan Chen,Peng Zhao,Yi Liang,Yi Ma,Yiyi Liu,Jinsong Zhao,Jingzhou Hou,Changjun Hou,Danqun Huo
Herein, we developed a unique screen-printed carbon electrode (SPCE) with three-dimensional melamine-doped graphene oxide/MXene composite aerogel (3D MGMA) modification, which is used for the simultaneous and sensitive detection of three metal ions (Zn 2+ , Cd 2+ , and Pb 2+ ) in the environment. A self-assembly method was used to fabricate 3D MXene aerogels based on MXene, graphene oxide (GO), and melamine . Notably, the network-like 3D structure combining 2D MXene and rGO sheets can provide a high ratio of surface area and enriched functional clusters, which are beneficial for improving the electrical conductivity and promoting the uptake of heavy metal ions. In the linear range of 3–900 μg L -1 , the constructed innovative sensing platform can sensitively detect Zn 2+ , Cd 2+ , and Pb 2+ simultaneously, with detection limits of 0.48 μg L -1 ,0.45 μg L -1 and 0.29 μg L -1 respectively. This work reflects precision and reliability in the detection of three water samples (tap water, Minzhu lake and Yangtze River) and four cereal samples (sorghum, rice, wheat and corn), proposing a novel strategy for monitoring heavy metal ions in the natural environment.
研究领域:
环境科学
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材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2023
·
IF 10.9
Zheng Ma,Zhiming Deng,Xinfeng Zhou,Lulu Li,Chenyang Jiao,Huiling Ma,Zhong-Zhen Yu,Hao-Bin Zhang
Lightweight and multifunctional compressible aerogels with low reflectivity are highly demanded to protect electronic devices from increasingly serious electromagnetic interference and radiation. Although simply incorporating magnetic particles can reduce the strong electromagnetic (EM) reflection caused by the high conductivity of MXene , high density, inhomogeneous dispersion and weak interfacial interactions may impede the potential applications. Here, we report the fabrication of three-dimensional magnetic MXene/Fe 3 O 4 @acidified-MWCNT (aMWCNT) composite aerogel by a directional freezing and subsequent freeze-drying process, and the shielding effectiveness of composite aerogel can be tuned from 32.5 to 51.6 dB in the X- band. At the same time, since the Fe 3 O 4 nanoparticles are pre-decorated onto aMWCNTs, the heterogeneous interface polarization and magnetic loss are enhanced at low loadings. Therefore, the reflected power coefficient of the aerogel is as low as 0.31 with an ultra-light density of only 10 mg cm - 3 . Moreover, the good reversible compressibility , fatigue resistance , excellent heat insulation , and infrared stealth grant the aerogels great application prospects for anti-infrared detection and green 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
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chen Li,Leilei Liang,Baoshan Zhang,Yi Yang,Guangbin Ji
The increasing sophistication of modern detection technology requires urgent solutions to the inherent conflict between radar and infrared (IR) stealth mechanisms, further complicated by the difficulties of integrating materials across diverse wavelengths. Here, a synergistic customization of interfacial engineering MXene-integrated aerogel has been developed, featuring a directional regulation of magnetic and dielectric properties. This innovative design incorporates medium-entropy alloy FeCoNi nanoparticles tightly anchored on the surface of a 3D MXene-based skeleton, creating multiple heterogeneous interfaces. The customized strategy leverages the alterations in the magnetic and dielectric components that significantly influence permeability and permittivity to enhance microwave absorption (MA) through magneto-electric synergy. The low emissivity of MXene, combined with the porosity of the aerogel, endows the material with exceptional IR camouflage capabilities. Theoretical and experimental results demonstrate that the FCM aerogel exhibits an excellent absorption bandwidth (EAB = 5.44 GHz) and low-frequency absorption (−27.29 dB at 2.84 GHz), along with reduced radar cross section signals (RCS max = −24.78 dB·m 2 ). Furthermore, the aerogel offers impressive thermal insulation (ΔT = 80 °C), IR emissivity (0.38), and multifunctionality (lightness, compressibility, hydrophobicity, and flame retardancy). This work provides a strategy for developing adaptable radar-IR compatible camouflage design for complex environments.
研究领域:
材料科学
·
纳米技术
·
电磁兼容性
·
航空航天工程
·
隐身技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 19
·10396-10412
·
IF 11.9
Jiafei Ren,Xing Huang,Ruolin Han,Guangxin Chen,Zheng Zhou,Qifang Li
With the rapid development of science and technology, it is urgent to develop the extreme condition-resistance and multifunctionality of sensors to broaden their application scenarios. Here, an extreme condition-resistant superelastic silica nanofiber (SNF)/MXene composite aerogel is fabricated by an ice-templating assembly strategy. The hierarchical three-dimensional cellular structure composed of conductive two-dimensional MXene nanosheets as a framework and flexible one-dimensional SNFs as a scaffold endows the composite aerogel with excellent mechanical and piezoresistive properties at an ultralow density of 9 mg cm−3. The assembled aerogel sensor shows a high sensitivity (−0.33 kPa−1), ultralow detection limit (0.01 kPa), rapid response/recover time (72/99 ms), large workable strain range (1–80%), and good stability (>5000 cycles), capable of detecting various human motions in real time, whether faint pulse beating or strenuous running. More importantly, the composite aerogel still maintains excellent mechanical and piezoresistive stability (>1000 cycles) after high-temperature baking (600 °C) or at ultralow temperature (−130 °C), even in liquid nitrogen (−196 °C). Furthermore, the outstanding thermal insulation performance (24.7 mW m−1 K−1) and exceptional low-voltage driven Joule heating performance (126.5 °C at 5 V) of the composite aerogel are presented simultaneously in a dual-mode thermal management device integrating heat generation and insulation. Based on these characteristics, a multifunctional aerogel sensor that can be used for synchronous sensing and thermal management is demonstrated for the first time. This work offers a novel insight into the development of multifunctional aerogel sensors and greatly broadens the application scenarios of wearable devices.
研究领域:
材料科学
·
纳米技术
·
传感器
·
热管理
·
可穿戴设备
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lanlan Gao,Hong Wang,Yunlei Zhou,Zhipeng Tian,Huanshun Yin,Jun Wang
MXene-based Ti 3 C 2 T X composite aerogels (βCD-MXene-SA) were prepared using thin layers of MXene and sodium alginate (SA) as matrix materials, β-cyclodextrin (β-CD) as surface modifier, and epichlorohydrin as cross-linker. The βCD-MXene-SA was characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared (FTIR) spectroscopy, and the results demonstrated that the βCD-MXene-SA had a larger specific surface area and a more developed pore structure. In addition, the maximum adsorption capacity of this βCD-MXene-SA for dibutyl phthalate (DBP) under the optimal adsorption conditions was 25 mg/g. The adsorption kinetics showed that the adsorption process was in good agreement with both kinetic models. The adsorption isotherms were consistent with the Langmuir and Freundlich adsorption isotherm models, suggesting that the adsorption of DBP by βCD-MXene-SA was the result of the combined effect of physisorption and chemisorption. The adsorption process may include monolayer adsorption on homogeneous surfaces and multilayer adsorption on multilayer surfaces. Outside, the ecotoxicological effects of DBP on crops were explored. The results showed that the treated wastewater could promote the growth of green beans, indicating that the toxicity of wastewater was significantly reduced after adsorption treatment.
研究领域:
材料科学
·
环境科学
·
化学工程
·
生态毒理学
✓ 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）