CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhipeng Yang,Hongqiang Li,Shifeng Zhang,Xuejun Lai,Xingrong Zeng
Flexible and wearable pressure sensors have attracted considerable attention for the wide application prospect in robot sensing, intelligent electronic skin and healthcare monitoring. Herein, a superhydrophobic MXene-coated carboxylated carbon nanotubes (C-CNTs)/carboxymethyl chitosan (CCS) aerogel with honeycomb-like porous microstructure was proposed for piezoresistive pressure sensor. Firstly, a C-CNTs/CCS aerogel with superior robustness, resilience and durability was fabricated via directional freeze-drying method. Secondly, the C-CNTs/CCS aerogel was dip-coated with a layer of MXene nanosheets and then chemically modified with 1H,1H,2H,2H-perfluorooctyltriethoxysilane (FAS). The obtained F-MXene@C-CNTs/CCS aerogel demonstrated superhydrophobicity and the water contact angle and artificial sweat contact angle reached 157° and 154°, respectively. Thanks to the synergism of the dual-conductive MXene-CNTs network, the aerogel-based pressure sensor realized fast response time (62 ms), wide detection range (up to 80 kPa) as well as excellent electrical stability and repeatability even under humid and sweaty environments. Additionally, the sensor was successfully applied for monitoring human motions including not only large-scale actions (joint movements, walking and running) but also small-scale muscle movements (pronunciation recognition and finger tapping). Interestingly, the sensor connected to an Arduino microcontroller circuit with Bluetooth module was able to wirelessly detect real-time movements of finger joints. Our findings conceivably stand out as a new strategy to fabricate high-performance piezoresistive pressure sensors for wide applications even at special working conditions.
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DOI
高影响因子
FlatChem
·
2023
·
IF 6.2
Yue Zhang,Zheng Wang,Xiaohao Liu,Yating Liu,Yuxuan Cheng,Daxiang Cui,Feng Chen,Wentao Cao
Biosensors with high sensitivity to sweat composition analysis are essential for non-invasive, real-time physiological monitoring of individual health status. However, it is challenging to construct a well-conductive and stable interface for electrochemical sensors. Here, we construct a sensitive sweat biosensor for ascorbic acid (AA) quantification built on a heterostructure with three-dimensional (3D) linked network microstructures made from two-dimensional (2D) MoS 2 nanosheets and 2D Ti 3 C 2 MXene. The as obtained 2D/2D heterostructures presented numerous active sites and avoid the issue of reduced surface areas, which was generally brought on by the accumulation of 2D nanomaterials. The electrode modified with 2D/2D heterostructure could realize efficient electron transport by abundant accesses to absorb AA molecules. Based on the inherent conductivity, extremely porous structure, and active catalytic properties of 2D/2D heterostructures, the biosensor for detecting the AA in artificial sweat had a sensitivity of 54.6nA μM −1 and a detection limit of 4.2 μM. This study provided a new promising approach for the design of high-performance sensing interfaces and facilitated the widespread use of personalized diagnostic devices.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Teng Guo,Yuan Lei,Xin Hu,Guang Yang,Jie Liang,Qiang Huang,Xiancai Li,Meiying Liu,Xiaoyong Zhang,Yen Wei
Ti 3 C 2 is regarded as the most popular MXene, which has been extensively investigated as a candidate for fabrication of adsorbents to remove environmental pollutants. However, the adsorption capacity of unmodified MXene is limited owing to the lack of specific adsorption sites. In this work, we reported a simple hydrothermal method for preparation of Ti 3 C 2 -MoS 2 composites and examined their adsorption removal of organic pesticide paraquat (PQ) for the first time. The adsorption equilibrium will reach within 30 min and the adsorption capacity was increased from 8.7 mg/g to 105.53 mg/g as compared with that of Ti 3 C 2 . The adsorption process is more inclined to follow the Freundlich isotherm model and quasi-second-order kinetic model, which points to that the adsorption process is multilayer adsorption and may followed both physical adsorption and chemical adsorption. Adsorption of PQ on Ti 3 C 2 -MoS 2 is a spontaneous exothermic process and many factors, such as temperature, pH values, and ion strength can influence the adsorption performance. The obvious increase of adsorption performance of Ti 3 C 2 -MoS 2 might be ascribed to the increase of specific surface area after the introduction of flower-like MoS 2 . More than that, PQ also might be catalytically degraded by Ti 3 C 2 -MoS 2 for its semiconductor property.
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高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Tianzi Xia,Guangyan Liu,Junjie Wang,Shili Hou,Shifeng Hou
In this work, the synthesized MXene (Ti 3 C 2 T x ) exhibited large specific area, biocompatibility, excellent electronic conductivity , and good dispersion in aqueous phase . The Chit/ChOx/Ti 3 C 2 T x nanocomposite was prepared through the continuous self-assembled process. Its structure is characterized by scanning electron microscopy (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). Moreover, the biosensor for cholesterol detection was fabricated via a one-step dip-coating method. Chit andTi 3 C 2 T x act as a support matrix to immobilize ChOx enzyme , and also play a role in increasing the electrical conductivity . Meanwhile, the addition of redox mediator (Fe(CN) 6 3 - /4- ) facilitates the electron transport from the analyte to the modified electrode in the oxidation of cholesterol. The DPV response exhibited an increase in current with increasing cholesterol concentration. Under the optimum conditions, the DPV response of the biosensor indicated a good linear relationship with the concentration of cholesterol ranging from 0.3 to 4.5 nM with a low detection limit of 0.11 nM, and a high sensitivity of 132.66 μA nM −1 cm −2 . In addition, with favorable selectivity and stability, the biosensor has been used to detect cholesterol in real samples and the results demonstrate that the biosensor has excellent practicability.
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DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Xinxin Li,Min Yang,Wenjing Qin,Changshun Gu,Lei Feng,Zhenhao Tian,Hanying Qiao,Junji Chen,Jianxing Chen,Shougen Yin
With the development of wearable intelligent devices, flexible textiles integrate high-performance sensing, electromagnetic shielding and Joule heating show broad application prospects. However, it is still difficult to improve all the performance simultaneously through simple methods. Here, we have prepared MXene/PU composite fiber film with multilayer porous network structure by using the electrospinning spraying alternate operation process. This film has ultra-high sensitivity (GF= 77,751), super large detection range (400%) and ultra-low detection limit (0.05%). Secondly, the multilayer fiber film has excellent EMI shielding performance (EMI SE=38 dB), and the EMI shielding capacity of the multilayer film can still exceed the commercial standard when it is stretched to 20%. Finally, the multilayer fiber film shows better Joule heating performance, including lower voltage drive (2 V) and faster thermal response (12 s). The excellent performance of the composite come from the synergistic effect of MXene and the unique multi-layer porous network structure. Among them, MXene provides excellent conductivity, electrothermal and electromagnetic shielding performance. The layered porous network structure can store the strain in advance and form a parallel circuit, which improves the sensing range, increases the transmission path of electromagnetic waves , and realizes the homogeneity of Joule heating. In addition, the outer PU slows down the invasion of oxygen, thus slows down the oxidation of MXene, and ensures the performance of materials in a long time. The multilayer fiber film has been proved to be suitable for sensing at low temperature, and has broad application prospects in wearability.
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Hong Li,Feng Shao,Xinzhu Wen,Yusen Ding,Chao Zhou,Yafei Zhang,Hao Wei,Nantao Hu
Developing scalable and facile techniques to design and construct unique structures of cathodes with high performance is challenging for the practical Li-S batteries. In this work, highly effective and scalable cathodes based on curved graphene/MXene bi-nanosheets-constituted fibers is demonstrated for long-lifetime Li-S batteries. Wet-spinning is introduced to design and fabricate sulfur cathodes based on graphene/MXene hybrid fibers, in which sulfur is uniformly distributed and intimately enveloped between graphene and MXene nanosheets. The high chemical affinity towards polysulfides enabled by MXene is demonstrated by experiments and density functional theory (DFT) calculations. The assembled cells show high sulfur utilization (the discharge capacity of 1483.1 mAh g −1 at 0.1 C), high rate performance (733.3 mAh g −1 at 2 C) and excellent long cycle stability (0.043% per cycle decay at 1 C over 1000 cycles). Moreover, a reversible areal capacity of 5 mAh cm −2 is achieved under a high sulfur loading of 5.6 mg cm −2 , revealing its great potential for practical applications. This study gives a valuable guidance to design advanced sulfur cathodes for high-performance Li-S batteries.
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高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2019
·
IF 2.752
Chongyan Hao,Yuan Liao,Yang Wu,Yajing An,Jiannan Lin,Zhengfei Gu,Minhong Jiang,Shi Hu,Xiaotian Wang
In this work, we report RuO 2 -loaded TiO 2 –MXene hybrid nanostructure as a promising photocatalyst possessing remarkable activity for photocatalytic nitrogen fixation in water at room temperature. The MXene was synthesized by HF etching of the precursor Ti 3 AlC 2 and used as the substrate for the growth of RuO 2 nanoparticles and TiO 2 through a hydrothermal reaction . The benign activity is mainly attributed to the synergetic effect among MXene, TiO 2 , and RuO 2 in photocatalytic ammonia synthesis by combining light harvesting and nitrogen activation.
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高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 24
·2200991
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IF 6.389
Xuesong Li,Ni Xue,Qian Yao,Liuyuan Han,Xiangyan Zhao,Bo Li,Tao He,Xutang Tao
As the quintessential representation of MXenes, Ti 3 C 2 T x has attracted widespread scientific interest and has demonstrated unparalleled potential in various applications. However, Ti 3 C 2 T x has always been subject to its ambient instability, which deteriorates the intrinsic properties and limits the practical applications. The mechanism responsible for oxidative degradation of Ti 3 C 2 T x has remained elusive, and the subsequent improvement of the preparation for ambient-stable Ti 3 C 2 T x is still a challenge. In this paper, the ambient instability of Ti 3 C 2 T x is found to be attributed to the presence of many oxidation active sites on the surface, the formation of which is highly correlated with the enrichment of etching by-products (AlF x or Al(OF) x ). Based on the above findings a slow-speed etching method is designed, using tetramethylammonium hydroxide as a separate etching-agent, to avoid adsorption of fluorine-containing by-products during etching. The prepared high-quality Ti 3 C 2 T x flakes exhibit excellent ambient stability even after 4 months of dispersion in water, unlike conventional aqueous Ti 3 C 2 T x dispersions that can only be kept for a few days. The intrinsic stability allows Ti 3 C 2 T x to avoid its decomposition in seawater desalination, and it exhibits superior desalination ability with a maximum reduction of 62.2% in Na + permeability and a maximum increase of 300% in water flux.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Yiming Chen,Wenquan Gu,Li Tan,Zhimin Ao,Taicheng An,Shaobin Wang
Photocatalytic H 2 O 2 production by O 2 reduction is an environmental-friendly process for solar light conversion to chemical energy. In this work, Ti 3 C 2 MXene was used as a non-noble metal cocatalyst to load on P25 as Ti 3 C 2 /TiO 2 (TC/TO) photocatalysts for photocatalytic H 2 O 2 synthesis. A H 2 O 2 formation rate (179.7 μmol L −1 h −1 ) of the optimized 10 %-TC/TO composite was obtained to be over 21 folds as high as that of P25 under UV light. Radical quenching experiments and superoxide radical detection confirmed the superoxide radical as the primary intermediate, suggesting the O 2 reduction in two-step single-electron indirect reaction. The higher activity of TC/TO can be attributed to the functions of Ti 3 C 2 MXene in accelerating the separation and transfer of photogenerated electron-hole pairs, suppressing their recombination, and blocking the surface Ti OOH formation. This work proves the promising roles of Ti 3 C 2 MXene in the photocatalytic reaction and further expands their new applications in photocatalysis .
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高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Shuyue Yang,Dongmei Zhang,Jie Xu,Zongping Zhang,Shibing Ni
High theoretical capacity and safety performance endow Li 3 VO 4 with great promising as anode material for Li-ion batteries. However, approaches and inner mechanisms to advance the performance of Li 3 VO 4 are limited. Herein, we demonstrate for the first time, continuously-high pseudocapacitive charge storage triggered by N doped MXene in a Li 3 VO 4 -based electrode, resulting in excellent comprehensive electrochemical performance. The hybrid electrode delivers high discharge capacity of 515.2 mAh g −1 after 500 cycles at 0.1 A g −1 . After periodic rate performance test from 0.1 to 2.0 A g −1 for 410 cycles, the capacity of the hybrid electrode can be fully recovered. Followed by additional 1000 cycles at 0.5 A g −1 , the hybrid electrode still delivers high discharge capacity of 457.6 mAh g −1 . The robust capacitive charge storage induced by N doped MXene and the remarkable comprehensive electrochemical performance are referential for the design of high performance Li 3 VO 4 -based anode material, and the facile approach is beneficial for mass production toward practical application. Graphical abstract Download : Download high-res image (210KB) Download : Download full-size image N doped MXene induced robust pseudocapacitive charge storage in a Li 3 VO 4 electrode is firstly demonstrated responsible for the excellent comprehensive electrochemical performance.
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高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 8
·期 5
·1673-1678
·
IF 6.641
Zhangshuo Liu,Yu Zhang,Hao-Bin Zhang,Yang Dai,Ji Liu,Xiaofeng Li,Zhong-Zhen Yu
High-performance and flexible electrically conductive materials with satisfactory mechanical strength are vital in shielding electromagnetic interference (EMI) and radiation for portable electronics and wearable devices. Two-dimensional transition metal carbides/nitrides (MXenes) with remarkable metallic conductivity are considered as ideal candidates for ultrathin EMI shielding films, but their poor mechanical performances often impede their practical applications. Herein, we fabricate highly conductive MXene-based films with remarkable EMI shielding performance and excellent mechanical strength by enhancing the interfacial adhesion among the adjacent MXene nanosheets with multivalent aluminum ions. The tensile strength of the MXene film is significantly enhanced by 190% from 28.7 to 83.2 MPa with the introduction of aluminum ions and its conductivity is retained at 265 600 S m−1, exhibiting superior comprehensive performances to the previously reported results with other reinforcements. The strong and highly conductive MXene film with a small thickness of 39 μm exhibits one of the highest EMI shielding performances of over 80 dB in the X-band. This work provides a simple and efficient strategy for designing and fabricating high-performance MXene-based materials for efficient EMI shielding applications.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Yuyi Wei,Dandan Liang,Hongyang Zhou,Shoujie Huang,Weiwei Zhang,Jin Gu,Chuanshuang Hu,Xiuyi Lin
Wood is a promising substrate to decorate conductive material for preparing sustainable composites with electromagnetic interference (EMI) shielding function. Understanding the influences of the assembly manner of conductive materials on the EMI shielding property is essential to develop a facile fabrication method. Herein, the assembly manner of the MXene on wood is adjusted by applying three coating methods, i.e., vacuum-assisted immersion, spray coating, and brush coating. The surface morphologies , interaction between wood and MXene, electrical properties, and EMI shielding effectiveness (SE) of MXene-decorated wood (M/wood) composites were studied systematically. The results show that brush coating provides a flat and laminated MXene layer, hence an efficient conductive network can be constructed with a small loading of MXene. Ultimately, the M/wood composite prepared by brush coating displays an EMI SE of 40.5 dB at 8.2 ∼ 12.4 GHz with a MXene loading of 1.41 mg/cm 2 . Moreover, M/wood composites demonstrated excellent anti-mold function thanks to the reducing activity and fluorine-containing groups of MXene.
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高影响因子
危险品化学品经营许可证（带存储）