ACS Applied Nano Materials
·
2025
·
IF 5.5
Xintong Dong,Mengyuan Li,Xueyan Zhong,Mingqi Sun,Xiaoying Zhang,Ying Wang,Yao Wang,Ying Guo
Electrochemical biosensors based on nicotinamide adenine dinucleotide (NADH)-dependent dehydrogenases hold great potential in analytical applications. However, previous biosensors can lead to enzyme detachment and inactivation, thus limiting their applications. This study presents a novel sensing platform based on a three-dimensional MXene-graphene oxide sponge (3D MG). The nanoporous sponge was synthesized by polyethylene glycol (PEG) assisted cross-linking of MXene and small-sized graphene oxide (GO) nanosheets, thereby forming a high-strength porous conductive network and addressing the instability of enzyme-based biosensors. This sponge significantly enhances enzyme immobilization (reducing leaching by 62.27% compared to MXene films) and maintains enzymatic activity under extreme conditions. The 3D MG sensing platform was further fabricated into two biosensors by immobilizing NADH-dependent dehydrogenases (with glutamate dehydrogenase and formate dehydrogenase employed as model enzymes, respectively), using the (2,2′-bipyridyl) (pentamethylcyclopentadienyl)-rhodium complex ([Cp*Rh(bpy)Cl]+) as a mediator that enables the regeneration of bioactive NADH. The two biosensors exhibited low detection limits (0.332 μM for NH4+ and 0.188 mM for HCO3–), excellent reproducibility (relative standard deviation < 4%), and long-term stability (94.82% and 92.63% signal retention after 60 days). The fabrication of 3D MG with a robust nanoporous structure and an enzyme-friendly environment provides a strategy for designing long-life multifunctional enzyme-based biosensors.
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高影响因子
CARBON
·
2025
·
IF 11.6
Min Chao,Bei Zhang,Jiahua Yang,Chunjia Luo,Chaobo Liang,Luke Yan
The electromagnetic absorption properties of single optimized wave-absorbing materials limit their practical applications in complex environments such as aerospace and military protection. Therefore, it is of great significance to develop composite materials that combine high temperature resistance, flame retardancy and other properties with efficient wave-absorbing properties. In this study, MXene/CB/PI (MCP) aerogels were successfully prepared by using polyimide (PI) as the polymer matrix and carbon black (CB) and MXene as the conductive fillers. The porous structure of the aerogel enhances the multiple reflections and propagation path length of electromagnetic waves. The conductive network facilitates the conversion of electromagnetic waves into electric currents for efficient conductive loss and multiple heterogeneous interfaces enhance the interfacial polarization. Therefore, the prepared MCP aerogel has excellent microwave absorption properties, with a minimum reflection loss (RL min ) of −56.3 dB and an effective absorption bandwidth (EAB) that completely covers the X-band (4.2 GHz). In addition, MCP aerogel also exhibits: excellent thermal stability (Weight loss is only noticeable above 520 °C), good flame retardancy (LOI up to 43.7 %) and good hydrophobicity (water contact angle of about 110°). MCP aerogel materials combine multiple functions and are expected to play an important role in aerospace and other fields.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Tong Zhou,Shuai Ma,Lixin Wang,Shen Xu,Yishu Huo,Yuting Feng,Yaru Zhang,Jinming Ma,Tifeng Jiao
Covalent organic frameworks (COFs) are emerging porous crystal materials with adjustable composition, structure and function, which provides a tunable platform for photocatalysis. There are still challenges in improving the photochemical properties of COFs. Therefore, we choose to design and prepare β-ketoenamine-linked COFs with high stability and covalently connect them with MXene based on Schiff base reaction. The ordered structure, visible light absorption and band gap of MXene/COF composites are optimized by different ratios of composites. The results show that MXene 0.5 /TAPB-Tp-COF has the best performance, with a specific surface area of 460.88 m 2 /g and a hydrogen production rate of 3360 μmol·g −1 ·h −1 , which is 26.67 times that of pure TAPB-Tp-COF. The MXene/TAPB-Tp-COF heterostructure engineering effectively retains the inherent microporous architecture and high surface area of pristine COFs, while introducing interfacial charge transfer channels that boost photogenerated carrier separation efficiency and accelerate charge migration kinetics. This covalent composite method has promoted the research and development of COFs-based photocatalysts. This covalent composite method is beneficial to the research and development of COFs-based photocatalysts.
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高影响因子
ACS Sensors
·
2024
·
IF 8.2
Xiao-Xue Wang,Chen-Yu Wang,Meng Yin,Ke-Zheng Chen,Sheng-Lin Qiao
MXene-based conductive hydrogels hold significant promise as epidermal sensors, yet their susceptibility to oxidation represents a formidable limitation. This study addresses this challenge by incorporating MXene into a tannic acid (TA) cross-linked silk fibroin matrix. The resulting conductive hydrogel (denoted as e-dive) exhibits favorable characteristics such as adjustable mechanical properties, self-healing capabilities (both mechanically and electrically), and strong underwater adhesion. The existence of a percolation network of MXene within the nanocomposites guarantees good electrical conductivity. Importantly, the surface interaction of MXene nanosheets with the hydrophobic moiety from TA substantially reduced moisture and oxygen interactions with MXene, thereby effectively mitigating MXene oxidation within hydrogel matrices. This preservation of the electrical characteristics ensures prolonged functional stability. Furthermore, the e-dive demonstrates inherent antibacterial properties, making it suitable for use in underwater environments where bacterial contamination is a concern. The utilization of this advanced e-dive system extends to the correction of diving postures and the facilitation of underwater healthcare and security alerts. Our study presents a robust methodology for enhancing the stability of MXene-based conductive hydrogel electronics, thereby expanding their scope of potential applications.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Guangpeng Ma,Wenyu Bai,Xinpu Zhou,Xianfeng Guan,Shuyu Zhang,Wanzhen Wu,Cuicui Li,Shuang Wang
Polyaniline (PANi) is widely used in supercapacitors owing to its unique structural flexibility and redox behavior. However, due to the limitations of the inherent molecular structure, the expansion and contraction of the PANi skeleton will be triggered during the charging and discharging process, leading to decreased stability and rapid degradation. For this reason, we design a novel sulfonated polyaniline structure of aniline copolymerized with 2-aminobenzenesulfonic acid, thus immobilizing the sulfonic acid group (−SO 3 H) side chain onto the PANi main chain. The −SO 3 H acts as a proton reservoir to provide protons for PANi, accelerating the occurrence of redox reactions and providing pseudocapacitance, effectively suppressing the deprotonation phenomenon. Then SPANi is grown in-situ on the interlayers of MXene, which induces the disordered polymer to be ordered on the MXene substrate, forming a 3D interconnected network composite with both high specific capacitance and excellent stability. SPANi/MXene composite has an outstanding specific capacitance of 512.45 F g −1 at 1 A/g and retains up to 92.16 % of the initial capacitance after 10,000 cycles. Assembled with PHEAA-PAA-MXene double-crosslinked organogel electrolyte to form an anti-freezing device with a specific capacitance of 158.63 F g −1 , it retains a high specific capacitance of 118.26 F g −1 even under the extreme conditions of −40 °C. The capacitance retention after 10,000 cycles is 95.2 % (20 °C) and 81.82 % (−40 °C), respectively. This work provides simple and effective methods to fabricate high-performance PANi-based electrodes and anti-freezing supercapacitors.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Wenying Zuo,Xiongdiao Lan,Guoyang Lv,Cuicui Yang,Ping Lan,Bo Peng,Pengru Liu,Ke Li
The oxygen evolution reaction (OER) is crucial for producing hydrogen through electrochemical water splitting using renewable energy sources. To enhance hydrogen production efficiency, an electrocatalyst with high efficiency and stability for OER is necessary. Layered double hydroxides (LDHs) are among the most active electrocatalysts for alkaline OER, but LDHs suffer from poor conductivity, potential agglomeration, and low intrinsic activity. Herein, sulfur–phosphorus codoping of CoFeLDH/MXene (S,P-CoFeLDH/MXene) nanoarray hybrid electrocatalyst was developed using a stripped Ti3C2Tx MXene substrate through an in situ growth strategy and sulfur–phosphorus codoping. The S,P-CoFeLDH/MXene electrocatalyst demonstrated remarkable activity and stability against oxygen evolution in alkaline media, with a low overpotential of 305 mV at 10 mA cm–2 and a Tafel slope of 39 mV dec–1. Moreover, the overpotential decreased by only 1.3% after 2000 CV cycles, surpassing the noble metal RuO2 catalyst. This effective strategy introduces an idea for a hybrid electrocatalyst designed for oxygen evolution, and the direct preparation method lays the groundwork for its broad application.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Yaoxun Zhang,Jian Zou,Shengji Wang,Xiangshu Hu,Zihao Liu,Peiyong Feng,Xin Jing,Yuejun Liu
MXenes are ideal conductive fillers to construct conductive routes for hydrogel-based flexible sensors owing to their great metallic conductivity, hydrophilicity , and high specific surface area. However, their high tendency to aggregate in sol solution severely limited the performance of the resultant hydrogels. Therefore, to enhance the performance of MXene-filled composite hydrogels , we proposed an oxidization method to tailor the nanostructure of MXene to improve the conductivity, transparency, mechanical properties, and sensitivity of the composite hydrogels. Meanwhile, it is noted that the conductivity of the hydrogel significantly affected the output performance of hydrogel-based triboelectric nanogenerator (H-TENG). The polyacrylamide/oxidized MXene (POM) hydrogel-based TENG with the highest output performance was assembled for self-powered sensing and energy harvesting , which demonstrated great reliability and durability with a maximum open circuit voltage of 243 V and a peak power density of 2.38 W/m 2 . Moreover, the relationship model between the conductivity of the hydrogel and the output performance of the H-TENG was successfully proposed based on the performance of the developed H-TENGs. Therefore, this work shed lights for reasonable design of H-TENGs with high output performance.
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高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Xiaoyang Jia,Ke He,Xingyu Liu,Zhuoran Yang,Rui Huang,Yangling Liu,Jun Lin,Xin Liu,Jian Wang,Shaojian He
For the proton exchange membrane (PEM) applying in vanadium flow battery (VFB), it is difficult to separate the electrolyte ions at two electrodes while conducting protons. In this work, a novel composite membrane is developed, organically modified-MXene (MDP) filled sulfonated poly(ether ether ketone) (SPEEK) membrane, where MDP is prepared through co-coating the polydopamine (PDA) and polyethyleneimine (PEI) on the surface of MXene. The two-dimensional structure of MXene can effectively reduce the vanadium ions permeation, while the surface functional groups from the coating layer can assist in proton transport, thus enhancing the membrane selectivity. The membrane with only 1.0 wt% MDP (SPEEK/MDP-1) achieves maximum selectivity of 7.1 × 10 7 S min cm −3 . Furthermore, the energy efficiency (EE) of the VFB loaded with SPEEK/MDP-1 reaches ~92.5% at 40 mA cm −2 current density. This work provides a new direction for enhancing the properties of PEM used in VFB applications. Graphical Enhanced EE of VFB by highly selective PEM.
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高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-18
·
IF 23.655
Cao Wentao,Wang Zheng,Liu Xiaohao,Zhou Zhi,Zhang Yue,He Shisheng,Cui Daxiang,Chen Feng
A bioinspired MXene-based user-interactive electronic skin (e-skin) for digital and visual dual-signal sensing was designed and fabricated.
The MXene-based e-skin exhibited an excellent electromechanical sensing performance and realized the real-time monitoring of human activities, such as handwriting, drinking, walking, and speaking.
Benefiting from the outstanding Joule-heating performance of MXene-based film, the e-skin with thermochromic pigments could realize a wider range and dynamic coloration for passive displays and visual recognition of various human motions.
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高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 6
·429
·
IF 21.8
Ma Shanshan,Liu Siqi,Yan Jifeng,Ren Bin,Yu Hang,Ma Zhaoyang,Sun Lina,Zhang Tengyang,Huo Jinpeng,Yang Yuhui,Fei Jie,Chae Sanghoon,He Chaobin,Li Hejun
The development of a multifunctional conductive film to meet the requirements of flexibility, high-strength and exceptional electromagnetic interference (EMI) shielding capacity in the electronic devices has attracted extensive attention. A strategy of hydrogel-induced ultra-fast protonation was proposed for preparing aramid nanofibers-transition metal carbonitrides-poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (ANF-MXene-PEDOT:PSS) conductive films. The ultra-fast protonation process would induce the formation of ultra-long molecular chains and the reconstruction of cross-linking networks to enhance the mechanical properties of films. The ultimate tensile strength of ANF-MXene-PEDOT:PSS (60%) film reached 233.6 MPa, showing an increase of 189.5%. Meanwhile, the encapsulation of conductive PEDOT:PSS layer effectively addressed the issues of the brittleness and highly oxidization susceptibility of MXene. The EMI shielding effectiveness of ANF-MXene-PEDOT:PSS (60%) film reached 45.7–48.2 dB from 8.2 to 26.7 GHz at a thickness of 36 μm. After a month for exposing to air, the EMI shielding capability of ANF-MXene-PEDOT:PSS (60%) film still remained stable (> 42.5 dB). This hybrid film also exhibited high conductivity (264.7 S·cm −1 ), self-cleaning, fire retardancy and joule heating properties, which was as an intelligent sensor to realize the real-time monitoring of human physiological signals. This work paves the way for large-scale production of next-generation high-performance EMI shielding films, demonstrating huge potential in electromagnetic protection, thermal management and intelligent wearable devices. Graphical
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高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Ziqi Ren,Qixiang Zhang,Jianyu Yin,Mingfang Deng,Xubin Zhou,Qianqian Yao,Songzhan Li,Yihua Gao,Nishuang Liu
The potential of reverse electrodialysis for harvesting osmotic energy is severely limited by ion concentration polarization (ICP), a phenomenon that restricts power output and confines the technology to the laboratory scale (< 0.4 µW). This challenge is overcome with an ionic liquid confined porous MXene (IPM) system that integrates strategies across two scales. At the microscopic level, sub-nanometer channels are engineered using porous MXene and confined ionic liquids to reduce mass transfer resistance and optimize ion transport. Concurrently, at the macroscopic level, a micropore array design spatially decouples the diffusion interfaces to effectively suppress the ICP effect. This dual-scale approach increases power density by 53.6% and achieves a maximum output power of 3.47 µW, which is nearly ten times higher than that of similar work. The work demonstrates a robust pathway for overcoming critical power limitations, advancing osmotic energy conversion toward industrial renewable energy applications.
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高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Wei Yang,Qiankun Han,Wenshi Li,Maosheng Wu,Jing Yao,Man Zhao,Xianmao Lu
Redox-enhanced electrochemical capacitors (redox ECs) are promising energy-storage devices with the potential to deliver both high power and energy performances, although overcoming the severe self-discharge remains a great challenge due to the shuttle effect of redox species such as I − /I 3 − ions introduced in the electrolytes for gaining additional capacities. Herein, we propose a cation-initiated self-assembly process of Ti 3 C 2 T x MXene nanosheets onto glass fiber membranes to form Janus separators that can mitigate the shuttling of I − /I 3 − ions in iodine-based redox ECs. The interlayer spacing of the MXene films can be controlled by selecting different cations such as imidazolium (C 4 mim + ), Mg 2+ , and Al 3+ , therefore the resulting Janus separators exhibit tailored nanochannels for ion sieving. Both molecular dynamic (MD) simulations and electrochemical tests indicate that C 4 mim + -intercalated MXene Janus separators (C 4 mim + -MXene) can block the diffusion of I 3 − ions while allowing the pass of other electrolyte ions. As a result, self-discharge caused by the shuttle effect can be much reduced in C 4 mim + -MXene-based redox ECs, which deliver voltage and energy retentions substantially higher than that of the cells using glass fiber membrane separators (voltage retention: 70% vs. 10%, energy retention: 51% vs. 6.5%) after 24-h open-circuit test.
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