COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Qinhua Wang,Xiaofeng Pan,Xinpin Wang,Haili Gao,Yongbiao Chen,Lei Chen,Yonghao Ni,Shilin Cao,Xiaojuan Ma
The restacking tendency of 2D Ti 3 C 2 T X (MXene) sheets is the main obstacle preventing their application as functional materials in hydrogel. Herein, we fabricated novel ultra-stable 3D MXene-polyacrylamide (PAM) nanocomposite hydrogels inspired by the structure of a spider web . In particular, MXene nanosheets were uniformly located in a gel medium by precise alignment of sonication treatments, followed by the in-situ self-assembly of PAM hydrogel. In this instance, the MXene nanosheets are well-confined and trapped ( via strong interactions) by the interwoven spider web-like structure of the PAM chains, which grow in-situ on the surface of the nanosheets. This approach proved effective to solve problems associated with the poor stability of MXene nanosheets in the hydrogel; more prominently, the tight cross-linked structure endows the MXene-PAM hydrogel with anti-compressive and anti-swelling capabilities; the continuous distribution of MXene nanosheets connected by the PAM network creates electron transport pathways and proton transport bridges in the hydrogel. Therefore, the hydrogel can be employed as a temperature and strain sensor or as a component of moist-electric nanogenerator.
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Huawei Wei,Mingqiang Wang,Wenhui Zheng,Zaixing Jiang,Yudong Huang
Electromagnetic shielding (EMI) materials are becoming more and more important because of the increasingly serious radiation pollution. The preparation of high mechanical strength , ultrathin, lightweight, flexible materials with excellent EMI shielding performance have so far been elusive. Here, we try to prepare an ultrathin, lightweight and flexible film with excellent EMI shielding performance using one-dimensional aramid nanofibers (ANFs) and two-dimensional few-layered Ti 3 C 2 T x through a simple filtration method. The ultimate tensile strength and strain of the film are up to 116.71 MPa and 2.64%. The EMI shielding effectiveness and the specific EMI shielding efficiency are 34.71 dB and 21971.37 dB cm 2 g −1 , which will be no recession after 1000 times bending. Our results show that a practical EMI shielding material with excellent performances has been successfully prepared, which will be widely applied in wearable electronics, robot joints, and precision instrument protection and so on.
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高影响因子
ANALYTICAL LETTERS
·
2022
·
IF 2.267
Xing Wu,Rongbin Kang,Yiyuan Zhang,Weiming Li,Tao Zhang
The concentration of alkaline phosphatase (ALP) in serum is an important biomarker for human health, thus the development of a simple method for its determination is important. In this work, the gold nanoparticles/Ti3C2Tx (Au/Ti3C2Tx) MXenes nanohybrids were prepared via a simple self-reduction step and introduced as the sensing platform to immobilize ALP antibodies. Meanwhile, because ALP dephosphorylates 4-amino phenyl phosphate to produce electroactive 4-aminophenol (AP), a simple labeled-free immunosensor was constructed for ALP by recording the differential pulse voltammetry signal of AP. The detection conditions were optimized and the analytical performance was evaluated. Under the optimized conditions, a wide linear range (10.0 to 1500 U L−1) and low detection limit for ALP (4.0 U L−1) were achieved. Furthermore, the selectivity, stability and reproducibility of the immunosensor were investigated, demonstrating desirable results. The results show that the proposed immunosensor has potential applications for practical ALP determination.
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高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Junxiu Piao,Anqi Li,Tianyi Li,Zongyao Zhang,Xu Han,Sheng Bi
Abstract Microencapsulated phase change materials for battery thermal regulation require efficient heat transport during normal operation and thermal resistance during thermal runaway propagation. MXene modified inorganic phase change microcapsules (IPCM/MXene) were prepared by inverse emulsion interfacial sol−gel encapsulation using disodium hydrogen phosphate dodecahydrate as the core and SiO2 as the shell. Ti3C2Tx MXene bridged adjacent microcapsules, increasing thermal conductivity by 70.5% while retaining 93.7% of the melting enthalpy of unmodified IPCM. Under high temperature condition, thermal conductivity decreased by 54.6% following MXene oxidation and inorganic residue formation. In 18650 cell tests, IPCM/MXene reduced the peak temperature from 44.7 to 33.7 °C at 3C discharge and maintained stable cooling during repeated cycling. During thermal runaway propagation, the triggering of thermal runaway was delayed by 1899–1970 s, while the interval between the second and third cells increased from 122 to 193 s. These results establish a nonflammable microcapsule design for battery thermal management and safety protection.
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高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yueying Wang,Jin Chen,Meidan Que,Qizhao Wu,Xinle Wang,Yuxi Zhou,Yuzhao Ma,Yanjun Li,Xiaofeng Yang
Visible-light responsive two-dimensional (2D) MXene heterostructure photocatalysts with synergistic photoelectron migration represent a practical approach with potential applications in water remediation. The present study reports the facile in-situ solvothermal synthesis of a heterojunction composite comprising Ti 3 C 2 T x /Bi 4 Ti 3 O 12 . The novel composite photocatalyst exhibits remarkable visible-light-driven photocatalytic activity towards complete degradation of tetracycline hydrochloride (TC-HCl), rhodamine B (RhB), and methyl orange (MO) by TB-20 within 20, 50, and 60 min of illumination, respectively. Furthermore, the exposed facet Ti 3 C 2 T x /Bi 4 Ti 3 O 12 heterojunction exhibits a synergistic effect with photocatalytic reactions, as evidenced by the transfer of photogenerated carriers and generation of O 2 − , thereby enhancing the performance of catalytic degradation of organic dyes. This study advances the development of photocatalysis by utilizing the MXene substrate to fabricate hierarchical structure composites, enabling efficient degradation of antibiotics and solar energy conversion for future applications.
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高影响因子
COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Can He,Meng Cai,Yu Huang,Xiaoqiang Fan,Minhao Zhu
Despite Ti 3 C 2 T x MXene has certified tremendous promise for improving the anti-corrosion/wear of epoxy resin, it falls short of matching the protective standards under long-term extreme conditions. Herein, 2-methylimidazole zinc salt ZIF-8 was grown in-situ on amino-functionalized Ti 3 C 2 T x nanosheets and doped with cerium cations (P + -Ti 3 C 2 T x @ZCe). The Ti 3 C 2 T x -based composite was then parallel arranged within epoxy coating utilizing electrophoretic deposition technique to prepare a novel self-healing intelligent coating (PMX@ZCe). The encapsulation structure of P + -Ti 3 C 2 T x @ZCe was investigated by XRD , FTIR, XPS, FE-SEM, TEM, Zeta potential and TG techniques. Furthermore, the corrosion/wear resistance and self-healing performances of PMX@ZCe were discussed detailedly and the strengthening mechanism of P + -Ti 3 C 2 T x @ZCe was revealed. Results indicate that PMX@ZCe maintains the highest |Z| 0.01Hz value of 1.24 × 10 10 Ω cm 2 after 4 weeks of electrochemical test and exhibits excellent self-healing efficiency of 153 % under artificial scratch, which is ascribed to the release of Ce 3+ /Ce 4+ that could form insoluble protective films at the coating/metal interface. The wear rate of PMX@ZCe is 2.29 × 10 −5 mm 3 /N · m about 56 % lower than that of EP. PMX@ZCe possesses satisfactory corrosion/wear protection performance, thanks to the synergy of good interfacial interaction , parallel-aligned barrier effect and active-passive protection. This work provides a new design thinking for MXene-based intelligent protective coatings that can meet the demands of multi-service environments.
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高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 28
·9721-9730
·
IF 4
Xinyu Liu,Lan Wang,Shan Ji,Vladimir Linkov,Qianqian Fu,Zhichao Li,Hui Wang
Due to their low cost and excellent electrocatalytic performance, nickel-based hydroxides are widely used as hydrogen evolution catalysts for large-scale hydrogen production by water electrolysis. In this study, a heterostructured composite with improved electron transport and modulated electron surface density was prepared by combining Ni(OH)2 with two-dimensional layered Ti3C2Tx (Ti3C2Tx-MXene). Ni(OH)2 nanosheets were formed on nickel foam (NF) substrates using acid etching, followed by the longitudinal growth of negatively charged Ti3C2Tx-MXene on positively charged Ni(OH)2/NF via electrophoretic deposition. The resulting structure facilitates spontaneous electron transfer from Ti3C2Tx-MXene to Ni(OH)2/NF by means of the Mott–Schottky heterostructure effect and establishes a continuous electron transport path which effectively increases the concentration of active sites, improving hydrogen evolution during water electrolysis. The obtained electrode is characterized by an HER overpotential of 66 mV (vs. RHE) and a Tafel slope of +105 mV dec−1 at a current density of 10 mA cm−2, combined with good electrochemical stability.
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PubMed
高影响因子
Analytical Methods
·
2023
·Vol. 15
·期 10
·1336-1344
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IF 3.1
Yuling Jiang,Miao Yang,Mingyao Yu,Lingling Huang,Yue Ke,Lei Yang
Herein, a simple and highly sensitive electrochemical sandwich-like immunosensor for the squamous cell carcinoma antigen (SCCA) was constructed using gold nanoparticle/graphene nanosheet (Au/GN) nanohybrids as a sensing platform and β-cyclodextrin/Ti3C2Tx MXenes (β-CD/Ti3C2Tx) as a signal amplifier. The good biocompatibility and large surface area as well as the high conductivity of Au/GN allow the platform to load primary antibodies (Ab1) and facilitate electron transport. In the case of the β-CD/Ti3C2Tx nanohybrids, the β-CD molecule is dedicated to binding secondary antibodies (Ab2) through host–guest interactions, thus inducing the formation of the sandwich-like structure Ab2-β-CD/Ti3C2Tx/SCCA/Ab1/Au/GN in the presence of SCCA. Interestingly, Cu2+ can be adsorbed and self-reduced on the surface of the sandwich-like structure to form Cu0 since Ti3C2Tx MXenes can exhibit superior adsorption and reduction capabilities towards Cu2+, and a prominent current signal of Cu0 can be observed via differential pulse voltammetry. Based on this principle, an innovative signal amplification strategy has been proposed for SCCA detection, which avoids the process of labeling the probe and the specific immobilization step of catalytic components on the surface of amplification markers. After the optimization of various conditions, a wide linear range from 0.05 pg mL−1 to 20.0 ng mL−1, coupled with a low detection limit of 0.01 pg mL−1, was obtained for SCCA analysis. The proposed method for SCCA detection was also applied in real human serum samples and the observed results are satisfactory. This work opens up new pathways for constructing electrochemical sandwich-like immunosensors for SCCA and other targets.
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PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2019
·
IF 4.63
Xin Zhang,Jianfeng Zhang,Huiyang Cao,Yahui Li
Although direct methanol fuel cells are promising as “green” power generators for portable electronics, their further development has been largely hampered by the low-efficiency of the commercial anode catalysts. In this study, (Ti 3 C 2 T x ) y -(MWCNTs) 1- y (0 ≤ y ≤1) supported Pt nanoparticle electrocatalysts were fabricated by a facile and scalable solvothermal strategy, after which two-dimensional(2D) Ti 3 C 2 T x nanosheets were found to be intercalated and connected by conductive one-dimensional(1D) MWCNTs. Used for methanol oxidation reaction, the Pt/(Ti 3 C 2 T x ) 0.5 -(MWCNTs) 0.5 catalyst exhibited the maximum electrochemical active surface area (ECSA, 154 m 2 /g) and excellent electrochemical activity (812.9 mA/mg), higher than not only Pt/Ti 3 C 2 T x and Pt/MWCNTs of this study, but also many other related catalysts reported in literature. In addition, the CO-poisoning behavior was also alleviated using Pt/(Ti 3 C 2 T x ) 0.5 -(MWCNTs) 0.5 instead of Pt/Ti 3 C 2 T x and Pt/MWCNTs. Such a superior performance can be attributed to the well dispersion of Pt nanoparticles (∼3.8 nm), enhanced layer distance of Ti 3 C 2 T x to capture more Pt nanoparticles, and conductive action of MWCNTs to connect Ti 3 C 2 T x . This study opens a new perspective for developing high performance supercapacitors using Pt catalysts supported by 1D-intercalated 2D materials.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 10
·1-13
·
IF 5.3
Zhong Yu,Liao Ran,He Guowen,Liu Saiwen,Zhang Jin,Chen Chao
Cubic hollow-structured NiCo-LDH was synthesized using a solvothermal method. Subsequently, clay-like Ti 3 C 2 T x MXenes were electrostatically self-assembled with NiCo layered double hydroxides (NiCo-LDH) to form composites featuring three-dimensional porous heterostructures. The composites were characterized using SEM, TEM, XRD, XPS, and FT-IR spectroscopy. Ti 3 C 2 T x MXenes exhibit excellent electrical conductivity and hydrophilicity, providing abundant binding sites for NiCo-LDH, thereby promoting an increase in ion diffusion channels. The formation of three-dimensional porous heterostructural composites enhances charge transport, significantly improving sensor sensitivity and response speed. Consequently, the sensor demonstrates excellent electrochemical detection capability for quercetin (Qu), with a detection range of 0.1–20 µM and a detection limit of 23 nM. Additionally, it has been applied to the detection of Qu in natural plants such as onion, golden cypress, and chrysanthemum. The recovery ranged from 97.6 to 102.28%. Graphical Abstract
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Junhao Cai,Yaru Peng,Po Hu,Yuan Zhou,Qiaoge Yao,Hao Lyu,Youtang Gao
The light absorption, active sites, and charge carriers separation of photocatalysts are extremely important factors in the field of photocatalysis. Near-perfect lattice-matched homojunction constructed using disorder engineering and doping strategies is an effective strategy to improve photocatalytic activity. Herein, we developed crystalline TiO 2 nanoparticles (NPs) and Ti 3 C 2 T x MXene-derived C-doped amorphous TiO x homojunction (TCT) at room temperature. In this homojunction, TiO 2 NPs are evenly distributed on the surface of the C-TiO x nanosheet to form a type-II structure, which promotes the separation of photogenerated carriers. The light absorption range of TCT extends to 550 nm due to the presence of intermediate energy levels in C-TiO x , which increases its photon absorption capacity. Moreover, TCT possesses a large number of oxygen vacancies, which are beneficial for improving the adsorption and degradation of pollutants. These characteristics of TCT could significantly improve its photodegradation performance for tetracycline. Interestingly, the precursor mass ratio of TCT with the best degradation efficiency is different under different illumination conditions, which is attributed to the different band gaps of C-TiO x and TiO 2 NPs resulting in different light absorption ranges. This work provides a new approach to rationally designing crystalline and amorphous homojunction for photocatalytic applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Fei Wang,Jingxia Gao,Delin Yang,Haoming Li,Jinping Zhang,Jie Liu,Yong Liu,Fengzhang Ren
The uneven lithium deposition on Cu current collector and poor interface stability of lithium metal/electrolyte would lead to rapid capacity decay and potential safety risks, which severely hinder the practical applications of lithium metal batteries. In this work, the in-situ derived Ti 3 C 2 T x MXene/TiO 2 (labeled as MXene/TiO 2 ) composite with favorable lithiophilicity and conductivity is applied as modified layer on Cu foil current collector (labeled as MXene/TiO 2 @Cu) to obtain the uniform and dense lithium plating. Compared with bare Cu and commercial TiO 2 nanoparticles modified Cu current collector (labeled as Nano TiO 2 @Cu), the MXene/TiO 2 @Cu combines abundant lithium nucleation sites and improved conductivity, which could promote uniform lithium plating and stripping at high current density and effectively avoid the generation of dead lithium or lithium dendrites. As a result, the MXene/TiO 2 @Cu-based symmetric battery could stably cycle for 2000 h at high current density of 3 mA cm −2 with capacity of 3 mAh cm −2 , and the MXene/TiO 2 @Cu-Li‖LiFePO 4 full battery could maintain the high reversible capacity of 104.0 mAh g −1 at 1 C after 500 cycles. This work provides an effective and novel protection strategy for Cu current collector, which is critical for the design of lithium metal batteries with favorite rate capability at high current density.
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高影响因子
危险品化学品经营许可证（带存储）