JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 46
·21537-21555
·
IF 3.5
Ma Jianfeng,Ma Shaoshuai,Shang Mengtian,Guo Luyao,Liu Cong,Xu Xinhua
In nature, various living organisms such as elephants can perceive and manipulate objects using their trunks. Inspired by biological structures, numerous hydrogel soft robots have been investigated; however, the weak mechanical properties and low conductivity of hydrogels limit their potential applications. Herein, the high-intensity, fast NIR-responsive hydrogel actuator based on bacterial cellulose (BC) as the passive layer and the high conductive hydrogel sensor with BC treated by thermionic source of butyl-3-methylimidazolium chloride (B-BC) as the passive layer are reported. The active layer consists of poly(N-isopropylacrylamide) (PNIPAm), functionalized silica nanoparticles (VSNPs), and 2-isocyanatoethyl methacrylate-modified MXene (M-MXene). Polymer is capable of grafting onto the VSNP surface to generate fast-transport channels for water expulsion, thereby significantly enhancing photoresponsive speed. Leveraging the pre-polymerization solution’s penetration into BC and the strong hydrogen bonding present, the interfacial toughness of the bilayer hydrogel (BC-GEL) reaches 33 N m −1 with a tensile strength of 2.1 MPa. As a proof of concept, BC-GEL is programmed as multidimensional grippers and perceptual actuators for intelligent traffic monitoring. Additionally, B-BC, obtained through in situ molecularization with a thermionic source, exhibits a conductivity of up to 6.74 S m −1 . Owing to the excellent sensing properties, B-BC-GEL can be prepared as somatosensory actuators and multi-appliance sensors. This research offers innovative insights into hydrogel self-sensing actuators for intelligent traffic safety monitoring systems and demonstrates significant potential for applications in human health detection and medical wearable electronic devices.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yuchuan Wang,Di Pang,Ying He,Honglin Li,Yan Tang,Lijuan Ye,Hong Zhang,Wanjun Li
Multi-stimulus-responsive actuators demonstrate significant potential in the fields of bionic robots, flexible electronics, and smart sensing. However, their practical applications have been hindered by inadequate environmental stability, limited response modes, and insufficient mechanical durability. This study designs an MXene&PVA/CNT&PVA (MP/CP) bilayer film actuator that achieves high-performance multi-field-coupled actuation through interfacial chemistry modulation and dynamic strain gradient synergy. The actuator demonstrates fast and multimodal responsiveness, achieving a bending deformation of 516° within 0.5 s (with full recovery in 1 s) at 90% relative humidity (RH), reaching an even larger bending angle of 1128° under near-infrared (NIR) light stimulation (200 mW cm − 2 ), while simultaneously exhibiting distinct sensitivity to polar solvents, and maintains exceptional environmental stability and cycling endurance. Capitalizing on these advantages, the MP/CP film enables precise control of smart switches, adaptive curtain operation, and biomimetic motions such as robotic locomotion and butterfly-like multimodal flapping through sequential stimulus regulation. This work provides novel insights for developing multifunctional smart actuators, with broad application prospects in adaptive soft robotics and environmental interactive systems.
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ACS Nano
·
2022
·
IF 18.027
Mingliang Cheng,Mengfan Ying,Rongzhi Zhao,Lianze Ji,Hongxia Li,Xianguo Liu,Jian Zhang,Yixing Li,Xinglong Dong,Xuefeng Zhang
Electromagnetic interference (EMI) shielding materials have attracted intensive attention with the increased electromagnetic pollution, which are required to possess high transparency and flexibility for applications in visualization windows, aerospace equipment, and wearable devices. However, it remains a challenge to achieve high-performance EMI shielding while maintaining excellent light transmittance. Herein, a sandwich composite is constructed by coating the core material of transparent wood (TW) with silver nanowire (AgNW)@MXene, exhibiting a maximum transmittance of 28.8% in the visible range and a longitudinal tensile strength of 47.8 MPa. The average EMI shielding effectiveness can reach up to 44.0 dB under X-band (8–12.4 GHz), ascribed to the increased absorption shielding induced by the multireflection of electromagnetic waves within microchannels of the TW layer and the interfacial polarization between AgNW and MXene. Simultaneously, large-scale EMI shielding films can be conveniently produced by our proposed method, which provides inspiration for the development of advanced EMI shielding materials for wide applications.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Qin Tang,Saiyu Yang,Tao Huang,Guangyin Liu,Jun Shen
Liquid metal (LM)-microdiamond (MD) composites are promising candidates for meeting 5 G devices’ requirements of high thermal conductivity (TC) and excellent electromagnetic interference (EMI) shielding. However, the poor wettability between LM and MD causes strong electron and phonon scattering at the interface, severely restricting their application. In this study, two-dimensional (2D) MXene was innovatively introduced as an interfacial layer into the MD-LM system via forming a robust wetting interface with the LM matrix, which optimized the interfacial bonding strength and the porosity. These improvements increased the composite’s TC to 45.78 W/m‧K and its EMI shielding performance to 70 dB. A competitive "trade-off" relationship exists between MXene thickness and the composite’s structure and properties, which was key to property regulation. This trade-off effect, associated with interfacial optimization and interlayer thickness, provides a theoretical basis for applying 2D materials in composite modification.
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ADVANCED ENGINEERING MATERIALS
·
2025
·
IF 3.3
Yangmin Jing,Yu Zhao,Xiaohui Cao,Kerui Li,Chengyi Hou,Qinghong Zhang,Yaogang Li,Hongzhi Wang
Taking inspiration from nature, researchers make efforts to develop flexible self-adaptive actuators, which are wearable and able to be integrated in clothing in order to meet the new demands of the intelligent era. MXene, an emerging two-dimensional nanomaterial, is gaining popularity owing to its unique properties. Herein, a kind of Janus MXene film actuator is developed through a simple method of one-step vacuum filtration with a specific Celgard 3501 membrane. The cause of the Janus properties and the actuation mechanism are demonstrated in detail. A sample of smart cloth functionalized by the Janus MXene films is further shown to illustrate its potential application. Based on the Janus MXene film actuator, GO/MXene and MXene/PDMS film actuators are designed for enhanced asymmetric structures according to hydrophilicity gradient. Finally, two different structural colors caused by the thin-film interference and photonic crystals are respectively applied to GO/MXene and MXene/PDMS film actuators, exhibiting chromogenic and chromic phenomena along with actuating performances.
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ACS Omega
·
2025
·
IF 4.3
Zhenzhong Hou,Qinghao Yang,Hai Lu,Ying Li,QiuLi Zhao
Although the Ti3C2 MXene has demonstrated exceptional promise for supercapacitor applications, its practical implementation is limited by its inherent tendency of undergoing restacking and oxidation. Herein, we propose a facile self-assembly strategy of in situ polymerization to construct lignosulfonate (LS)-modified polypyrrole (PPy)/MXene hybrid hydrogels with a hierarchical porous structure. The formed PPy nanoparticles and coating layer effectively prevent MXene restacking and oxidation, while enhancing electrical conductivity and electrochemical activity. Furthermore, LS contributes redox-active quinone groups, further promoting electron and proton storage and exchange. The hierarchical heterostructure provides continuous ion-diffusion pathways and exposes abundant electroactive sites, yielding a remarkable specific capacitance of 663.7 F g–1 at 0.2 A g–1 with 81.2% capacitance retention and 95.3% Coulombic efficiency after 5000 cycles at 2 A g–1. Assembled solid-state symmetric supercapacitors achieve an exceptional energy density of 29.3 W h kg–1 at 200 W kg–1 and maintain 12.4 W h kg–1 at an ultrahigh power density of 3200 W kg–1, alongside fairly good cycling stability (87.6% capacitance retention) and a Coulombic efficiency of 94.1% over 5000 cycles. These results highlight the multifunctionality of the LS component within the hybrid hydrogels─simultaneously stabilizing the structure, improving electrical conductivity, generating cross-links, and contributing toward pseudocapacitance─establishing LS-modified PPy/MXene hybrid hydrogels as high-performance electrode materials for advanced supercapacitor applications.
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PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Xiaobo Li,Ying Huang,Ting Zhang,Ying Chen,Xin Liu,Yanwen Li,Rui Yuan,Tengning Ma,Li Yang,Qiang Wang,Guanjun Chang
The rapid development of portable electronic devices requires high-performance electromagnetic interference (EMI) shielding materials that exhibit excellent mechanical strength and flexibility. Inspired by the hierarchical structure and mechanical robustness of nacre, in this work, we choose konjac glucomannan (KGM) as the mortar and MXene as the brick to prepare an ultrathin, flexible and environmentally friendly MXene/KGM composite film via a facile vacuum-assisted filtration method. MXene nanosheets are introduced into KGM matrix to assemble a nacre-like structure through strong hydrogen bonding interactions between the rich surface-terminating groups of MXene and the hydroxyl groups of KGM. As expected, the as-prepared MXene/KGM composite film with 40 wt% MXene content exhibits optimal mechanical properties, including a tensile strength of 145.8 MPa and an elongation at break of 8.1 %. Moreover, this composite film also achieves an EMI shielding effectiveness of 24 dB, demonstrating a balance between mechanical properties and EMI shielding effectiveness. The resulting environmentally friendly MXene/KGM composite film demonstrates significant potential for application in next-generation flexible electronic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Luyao Guo,Shaoshuai Ma,Cong Liu,Mengtian Shang,Jianfeng Ma,Xinhua Xu
Inspired by the multi-directional environmental perception and adaptive morphological responses observed in biological systems, researchers have developed self-sensing soft actuators. However, current systems are restricted to unidirectional sensing capabilities and limited programmability, which hinders the realization of high-precision self-sensing and complex shape morphing. Herein, we develop a multi-directional self-sensing actuator with stretchability and conductivity that effectively addresses these limitations. Multi-directional self-sensing hydrogel actuator with elaborately aligned structure is successfully synthesized by aligning surface-functionalized MXene nanomonomers (m-MXene) under an alternating current (AC) electric field and in situ copolymerized with a thermoresponsive poly(N-isopropylacrylamide) hydrogel. The programmable shape-morphing hydrogel actuators with rapid response, light-actuation remote control, and self-sensing capability are fabricated by engineering the distribution of AC fields through the patterns and relative positions of the electrodes. Meanwhile, electrode-guided directional enrichment of m-MXene achieved anisotropic conductivity, forming the foundation for constructing logic gates. The hydrogel actuator exhibits strain-sensing performance, enabled by the engineered cross-aligned architecture of m-MXene that allows multi-directional strain detection. As a proof-of-concept, a photoresponsive hand-shape self-sensing actuator integrated with manipulator systems demonstrated intelligent closed-loop control of end-effectors through photoelectric-mechanical feedback. This work is expected to provide new insights for the development of next-generation soft robotics and artificial intelligence devices.
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Catalysts
·
2025
·Vol. 15
·期 11
·1037
·
IF 4
Ming Cai,Shaokun Lv,Yuanyuan Li,Wahyu Prasetyo Utomo,Yongsheng Yan,Zhi Zhu,Jun Zhao
Photocatalytic CO2reduction holds great potential for sustainable solar fuel production, yet its practical application is often limited by inefficient charge separation and poor product selectivity. The photothermal effect presents a viable strategy to address these challenges by reducing activation energies and accelerating reaction kinetics. In this work, we report a rationally designed CN-B/Ti3C2heterojunction that effectively leverages photothermal promotion for enhanced CO2reduction. The black carbon nitride (CN-B) framework, synthesized via a one-step calcination of urea and Phloxine B, exhibits outstanding photothermal conversion, reaching 131.4 °C under 300 mW cm−2illumination, which facilitates CO2adsorption and charge separation. Coupled with Ti3C2MXene, the optimized composite (3:1) achieves remarkable CO and CH4production rates of 80.21 and 35.13 μmol g−1h−1, respectively, without any cocatalyst—representing a 2.9-fold and 8.8-fold enhancement over CN-B and g-C3N4in CO yield. Mechanistic studies reveal that the improved performance stems from synergistic effects: a built-in electric field prolongs charge carrier lifetime (3.15 ns) and reduces interfacial resistance, while localized heating under full-spectrum light further promotes CO2activation. In situ Fourier transform infrared (FTIR) spectroscopy confirms the accelerated formation of key intermediates (*COOH and *CO). The catalyst also maintains excellent stability over 24 h. This study demonstrates the promise of combining photothermal effects with heterojunction engineering for efficient and durable CO2photoreduction.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yumeng Ge,Sin-Yi Pang,Jinhua Hu,Pengjie Zhong,Zhen Xiao,Le Wang,Zewen Su,Gongxun Bai,Shiqing Xu,Jianhua Hao
Addressing the water shortage issue in a green and sustainable manner, solar water evaporation technology is regarded as a promising strategy for water desalination. However, conventional solar evaporators face structural limitations and exhibit lower evaporation rates, hindering their practical application. In this study, we propose a biomimetic three-dimensional (3D) solar evaporator that demonstrates exceptional performance in light absorption and thermal management. By utilizing two-dimensional (2D) HF-free MXene nanosheets as photothermal materials, the evaporator enhances light capture, and the surface-rich functional groups of these nanosheets facilitate efficient water transport. Experimental results have shown that, by leveraging the advantages of the 3D structure, the evaporation rate of water under single solar irradiation can reach 3.46 kg m -2 h −1 , surpassing many other experimental devices. In addition to its environmental friendliness, the evaporator’s edge salt crystallization provides excellent anti-salt deposition functionality. Furthermore, purification experiments on West Lake water were conducted, demonstrating its efficacy in water treatment. This innovative evaporator can be considered as a 3D sustainable seawater desalination strategy with potential application prospects.
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International Journal of Chemical Reactor Engineering
·
2025
·
IF 1.4
Huan Xi,Lu Wang,Haimeng Huang
Antibiotics in water body pose a threat to the ecosystem and human health, and the removal of antibiotics in water is imperative. Ti 3 C 2 T
x
has high specific surface area and structural stability, but suffers from low catalytic activity and insufficient utilization of active sites. In this paper, Ti 3 C 2 T
x
/Bi 2 S 3 composites (named PTB and STB, respectively) were prepared by in situ synthesis and physical composite method. The introduction of Bi 2 S 3 extends the light absorption of the composites to the visible region. Meanwhile, the electron migration resistance in PTB is smaller and the photoresponse current is larger. PTB exhibited better adsorption-photocatalytic performance than STB and pure Ti 3 C 2 T
x
, with a removal efficiency of 89 %. In addition, the study investigated the effects of water quality parameters and proposed a possible photocatalytic mechanism. Finally, the tetracycline adsorption and photocatalytic performance of PTB in real water samples showed good results, especially in lake water and tap water.
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Nature Communications
·
2026
·
IF 18.1
Xiao Jiaxin,Bu Lingjun,Wu Yangtao,Zhou Shiqing,Xie Sheng,Zeng Zebing
Ion selective electrodes represent a promising approach for ion detection based on potentiometric sensing principle. However, their practical application is often hampered by insufficient selectivity, primarily caused by interference from structurally similar ions. Herein, inspired by biological potassium ion channels, we demonstrate an efficient perchlorate ion selective electrode via the self–assembly of pyrrole–functionalized MXene nanosheets and methylated quaternary ammonium compounds. The resulting composite sensor significantly outperforms commercial ion selective electrodes with a > 10 4 –fold lower detection limit (10 –9.7 M), 18–fold higher selectivity ( K ij of 130.4), and a maximum sensitivity up to 59.6 mV/dec for perchlorate. Synchrotron X–ray scattering and mechanistic studies attribute this superior performance to a hydrophobic gating mechanism arising from dehydration effects and transport resistance within confined channels, which effectively lowers the energy barrier for perchlorate transport by 12.13 kcal/mol compared to that of sulfate. Furthermore, the sensor was optimized via substituent engineering for broad-spectrum anion detection and integrated into a portable platform for continuous on–site monitoring, achieving accuracy comparable to ion chromatography in real–world scenarios.
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