CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Lili Zhu,Hao Zhang,Zuming Hu,Junrong Yu,Yan Wang
To acquire excellent wave-absorbing materials with broadened applications, transition metal carbides (Ti 3 C 2 T x , MXene) have been the research focus. However, the high conductivity of MXene limits its electromagnetic wave (EMW) absorption capability; meanwhile, the inferior mechanical properties of MXene-based aerogels severely restrict their applications. Here, porous MXene (PMXene) nanosheets were prepared by hydrogen peroxide etching, which was then physically and chemically crosslinked with cellulose nanofibres (CNF) to successfully prepare PMXene/CNF composite wave-absorbing aerogels with excellent mechanical properties. PMXene/CNF aerogel achieved a minimum reflection loss (RL min ) of − 72.27 dB and an effective absorption bandwidth (EAB) of 5 GHz at a thickness of 1.63 mm without any magnetic component. The aerogels exhibited excellent environmental stability at a density of 12.5 mg/cm 3 , including fatigue resistance (100 compression cycles, 0.075 energy loss efficiency) and low-temperature resistance. Refining the mechanical properties exploits the aerogel’s potential for motion monitoring and electronic skin applications. In addition, the aerogels integrate properties such as water–oil separation, photothermal conversion, and thermal insulation (thermal conductivity of 0.045 W/(m-K)). Therefore, multifunctional PMXene/CNF aerogels have a broad potential for future application in the defence industry, electronic devices, and smart wearable fields.
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高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Xinyu Wang,Wenbin Wang,Meng Gao,Hao Yu,Min Fu,Wei Chen
A molecularly imprinted electrochemical sensor was designed for the quantitative and efficient detection of melatonin (MT) based on a CuxO/MXene modified screen-printed carbon electrode (MIP/CuxO/MXene/SPCE). Herein, the CuxO/MXene nanocomposite was prepared via a hydrothermal method. The CuxO was uniformly dispersed on the surface and the interlayers of the MXene, forming hybrid heterostructures. The encapsulated CuxO increased the interlayer distance of the MXene matrix to bring more active sites and accelerated the oxidation reaction of melatonin molecules, and thereby the electrochemical response of the sensor was improved. The MIP was constructed by electropolymerization of o-phenylenediamine (o-PD) in the presence of MT on the surface of the CuxO/MXene/SPCE. The morphology and chemical composition of the hybrid film were characterized by scanning electron microscopy and X-ray photoelectron spectroscopy; the electrochemical behaviors of the sensor were evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimal conditions, the MIP/CuxO/MXene/SPCE sensor had a wide linear detection range of 5–700 μM and a low detection limit of 0.029 μM (S/N = 3) for MT. The sensor also showed excellent selectivity, reproducibility, and stability. Finally, it was successfully applied for MT detection in human urine with satisfactory recovery. Overall, this study provided a sensitive and efficient strategy for the determination of MT.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Bingbing Xu,Yue Zhang,Jia Li,Boxiang Wang,Ruoxin Li,Dehong Cheng,Guangtao Chang
Conductive hydrogels have attracted intensive attention for their promising applications in flexible electronics, sensors, and electronic skins. However, extremely poor adaptability under cold or dry environmental conditions along with inferior repairability seriously hinders the development of hydrogels in wearable electronics. Here, a triple network conductive hydrogel (PBCP A -MXene) was prepared by proportionally mixing polyvinyl alcohol (PVA), borax, chitosan (CS), phytic acid (PA), and MXene. The prepared triple network hydrogels composed of robust chitosan polysaccharide as the first network, tough PVA biopolymer gel as the second network, and MXene nanosheets as the third network. Facilitated by triple networks, multiple hydrogen bonds, and electrostatic interactions of CS and PA, the obtained hydrogels not only exhibited outstanding mechanical properties (tensile strain of ∼1580 %, stress of ∼280 kPa) and electrical properties (∼ 2.72 S/m), but also possessed excellent self-healing, self-adhesion, anti-freezing and anti-drying properties. This work presents a strategy for the development of biopolysaccharide hydrogels for applications in the field of sensors.
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PubMed
高影响因子
IEEE SENSORS JOURNAL
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2024
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IF 4.3
Yixin Lu,Jun Sun,Wenqing Xu,Xinpeng Di,Wenchao Zhao,Long Zhang,Gebo Pan
Flexible, skin-like sensors are capable of converting various external stimuli into measurable electrical signals, crucial for advancing human-computer interaction and wearable health monitoring devices. Previous research on flexible smart sensing elements has primarily targeted single sensing functions, leaving the quest for integrated sensors capable of monitoring multiple signals largely unmet. In this paper, a signal-independent and interference-resistant pressure-temperature dual-mode sensor was fabricated by using a synergistic approach of structure and material design. A temperature-sensitive layer with a high temperature coefficient was prepared by introducing MOF-MXene into PU, and the dual-mode sensor was subsequently obtained by assembling it with S-MXene/PVDF composite as the encapsulating material and the pressure sensing layer. Fabric electrodes have small longitudinal dimensions as well as favorable compressibility and are well suited for the preparation of the miniature integrated sensor. Remarkably, the sensor demonstrates independent high-performance detection of both temperature and pressure signals. In terms of temperature sensing, the device has an average sensitivity of -3.6 %·°C
-1
and a resolution of 0.1 °C, which is better than most sensors based on thermally sensitive semiconductor materials. The sensor has excellent resistance to stress and pressure interference, which is promising for application in the detection of human physiological signals. While pressure sensing, the sensor has excellent overall performance, such as high sensitivity (1.02 kPa
-1
), skin-like rapid response time (40 ms), ultra-high cyclic stability (20,000 cycles). Benefiting from the smaller temperature coefficient of the dielectric composite material, the sensor is insensitive to temperature within the range of 20-50 °C.
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TRIBOLOGY INTERNATIONAL
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2024
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IF 6.1
Yan Huang,Zhangpeng Li,Kaiming Hou,Shuwen Liu,Qiulong Gao,Xiaonan Miao,Jinqing Wang,Shengrong Yang
In this study, a polydopamine (PDA)-modified MXene-PNIPAM (pMP) hydrogel is prepared using a soap-free emulsion polymerization method, which shows enhanced anti-oxidative, photo-thermal, and tribological properties. The introduction of PDA not only inhibits the oxidation of MXene but also enhances the photo-thermal conversion efficiency of the hydrogel. Even after 50 days, it can still maintain good photo-thermal conversion performance. Moreover, compared with PNIPAM hydrogel, the friction coefficient (COF) and wear volume of pMP hydrogel as lubricant were reduced by 33% and 85%, respectively. Interestingly, the control of COF with excellent reversibility and durability is achieved using pMP hydrogel modulated by near-infrared light. The pMP composite hydrogel exhibits promising prospects in the fields of intelligent robots and biomedical devices.
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ACS Applied Polymer Materials
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2025
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IF 4.7
Jianzhong Ma,Huiyuan Liang,Wen Li,Enhao Liang,Wenbo Zhang
Hydrogel materials containing gelatin can improve the biocompatibility and biodegradability of sensing materials, so they can be widely used in flexible sensors, health monitoring, and smart electronic devices. In this paper, using gelatin as a biomass-based material, the interpenetrating network structure formed between gelatin and polyacrylamide could not only improve the strong stretchability and flexibility of hydrogel but also provide more binding sites for conductive materials. Then, the polyacrylamide–gelatin MXene hydrogel (PGMH) sensor with excellent sensing performance and tensile strength was prepared by introducing MXene into the polyacrylamide–gelatin network structure. In addition to enhancing the mechanical properties of the hydrogel, the electrical conductivity and sensing properties are effectively improved as a wearable electronic device; the breathability of the hydrogel sensing material can ensure its adequate wear safety and comfort. Importantly, its biomass-based feedstock also gives it excellent stability and comfort to use. The designed hydrogel sensor has good stability and wide applicability and has great application potential in the next generation of degradable wearable electronic devices.
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Journal of Energy Storage
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2024
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IF 8.9
Peilong Ji,Li Liu,Yi Deng,Yan Luo,Yinghan Cao,Bingke Li,Keliang Wu,Xuejun Dong,Zhiyong Liu,Yanlong Tai
Ti 3 C 2 T x MXene shows good promise in energy storage applications, but 2D MXene sheets exhibit serious stacking problems due to hydrogen bonding and van der Waals forces. This blocks active sites and impedes fast electrolyte ion transport. MXene pore structures can be designed to simultaneously inhibit interlayer stacking and accelerate ion transport. However, current studies on the pore structures of MXene are often limited to a single scale, meaning that the efficiency of electrolyte ion transport cannot be fully optimized. Therefore, inspired by nature, we designed a 3D hierarchical porous MXene that spans the microporous, mesoporous, and macroporous ranges. The constructed 3D hierarchical porous structure ensures the exposure of more active sites, shortens the paths available for electrolyte ion transport, and improves transportation efficiency. Thus, the performance of the MXene for electrochemical applications is comprehensively improved. As a supercapacitor electrode, the prepared Zn-H 2 O 2 -Ti 3 C 2 T x MXene exhibits good capacitance (378.8 F g −1 at 2 mV s −1 and 391.2 F g −1 at 1 A g −1 ) and superb rate performance (retention of 76.7 % at 1 V s −1 ). Moreover, this electrode can be stably cycled at 200 mV s −1 (10,000 cycles, retention of 95.88 %). At a power density of 120.8 W kg −1 , an assembled Zn-H 2 O 2 -Ti 3 C 2 T x /carbon cloth flexible symmetric supercapacitor exhibits an excellent energy density of 13.42 Wh kg −1 . This research offers new ideas for designing 3D hierarchical porous MXene materials.
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ACS Applied Nano Materials
·
2024
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IF 5.3
Tiantian Lv,Fan Wu,Zhuozhen Zhang,Zongxing Liu,Ya’nan Zhao,Long Yu,Jiarong Zhang,Chunna Yu,Chang Zhao,Guangjian Xing
Efficient removal of broad-spectrum organic pollutants is crucial in wastewater treatment. This research focuses on the synthesis of three-dimensional TiVCTX MXene/graphene nanosheet-based aerogels, known as TiVCTX/GAs, using a straightforward hydrothermal self-assembly method, followed by freeze-drying. The integration of bimetallic MXene and graphene aerogel in TiVCTX/GAs results in an impressive broad-spectrum removal capability for multiple organic contaminants from wastewater. TiVCTX/GAs exhibit effective adsorption of various dyes and drugs, with adsorption capacities reaching 319.67, 303.45, 229.97, 217.87, and 283.38 mg·g–1 for methylene blue, rhodamine B, Congo red, methyl orange, and tetracycline hydrochloride, respectively. To fully comprehend the adsorption mechanism of TiVCTX/GAs, various models for the adsorption process were examined including kinetic, isothermal, and thermodynamic models. The adsorption process aligns with the Langmuir model and the pseudo-second-order kinetic model. The intraparticle diffusion model suggests that intraparticle diffusion is not the only rate-controlling step. Moreover, thermodynamic analysis indicates that the adsorption process by TiVCTX/GAs is spontaneous. These aerogels also effectively remove common oils and organic solvents from wastewater through absorption treatment with a substantial absorption capacity ranging from 40 to 90 g·g–1. Particularly, for high-viscosity oils that are challenging to absorb, TiVCTX/GAs demonstrate remarkable absorption ability by reducing their viscosity through photothermal heating. Overall, TiVCTX/GAs show great promise as versatile adsorbents and absorbers for efficiently and comprehensively removing various organic contaminants from wastewater.
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CHEMICAL ENGINEERING JOURNAL
·
2025
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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.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Bai Li,Gege Fu,Chao Liu,Yang Lu,Yingqian Mi,Dongmei Yan,Jiahang Wu,Xinhua Dai,Dianbo Cao,Wanchao Liu,Xiaomin Liu
Photothermal therapy (PTT) has attracted much attention due to its less invasive, controllable and highly effective nature. However, PTT also suffers from intrinsic cancer resistance mediated by cell survival pathways. These survival pathways are regulated by a variety of proteins, among which heat shock protein (HSP) triggers thermotolerance and protects tumor cells from hyperthermia-induced apoptosis. Confronted by this challenge, we propose and validate here a novel MXene-based HSP-inhibited mild photothermal platform, which significantly enhances the sensitivity of tumor cells to heat-induced stress and thus improves the PPT efficacy. The Ti 3 C 2 @Qu nanocomposites are constructed by utilizing the high photothermal conversion ability of Ti 3 C 2 nanosheets in combination with quercetin (Qu) as an inhibitor of HSP70. Qu molecules are loaded onto the nanoplatform in a pH-sensitive controlled release manner. The acidic environment of the tumor causes the burst-release of Qu molecules, which deplete the level of heat shock protein 70 (HSP70) in tumor cells and leave the tumor cells out from the protection of the heat-resistant survival pathway in advance, thus sensitizing the hyperthermia efficacy. The nanostructure, photothermal properties, pH-responsive controlled release, synergistic photothermal ablation of tumor cells in vitro and in vivo, and hyperthermia effect on subcellular structures of the Ti 3 C 2 @Qu nanocomposites were systematically investigated.
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ACS Omega
·
2024
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IF 3.7
Huiqin Li
Soft electro-ionic actuators have received extensive research and attention due to their advantages such as low voltage response and adjustable deformation. However, they have not been able to enter the actual industry application like traditional rigid actuators; one of the reasons may be that the kinematic properties of actuators have been less studied. The electro-ionic actuator based on Ti3C2Tx MXene-CNT/PPy electrode prepared in this paper shows good bending displacement (18.8 mm) and strain (0.63%) under 4 V voltage. In this article, the overlapping nature and exponential function relationship of the actuator end-point trajectories are preliminarily discussed, and the morphology change and cubic polynomial function relationship of the actuator body are considered. Moreover, in application, a novel proof-of-concept model of smart wearable finger straps is proposed. This study is a unique attempt and is hoped to provide a new research perspective in the field of soft electro-ionic actuators.
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IONICS
·
2025
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IF 2.6
Wu Mingjun,Li Junhao,Chen Weitao,Chen Junyang,Chen Xiaobo,Ru Qiang
The further advancement of high-performance zinc ion batteries (ZIBs) is restrained by inevitable metal dendrites in Zn anodes. Researchers actively pursue strategies to develop chemically stable, dendrite-free zinc anodes. Herein, we employ a zinc dendrite-inhibiting tactic by using highly conductive accordion-like V 2 CT x -MXene as robust artificial interface layers. Base on in-situ optical microscope, laser scanning confocal microscope and electrochemical analysis, the results confirm that the artificial interface can prevent direct contact between electrolyte and anode, which minimizes the chances of side reactions occurring. V 2 CT x -MXene@Zn electrode provides a stable Zn anode surface and facilitates homogeneous deposition of Zn ions. The V 2 CT x -MXene@Zn symmetric cell depicts the reinforced stability with over 2000 h life span at 0.5 mA cm −2 and 1.0 mAh cm −2 . The full batteries can work at 5 A g −1 up to 2000 cycles with a high-capacity retention of 86.64%. This work offers a controllable interface protection strategy to achieve long-duration and dendrite-free zinc-ion battery.
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