JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 24
·1895
·
IF 3.2
Xiao Hongbo,Lin Zhenqin,Chen Yangdie,Cai Haopeng
Driven by the rapid deployment of 5G/6G infrastructures and next-generation radar technologies, there is an escalating requirement for ultrathin, lightweight electromagnetic wave absorbers capable of delivering robust attenuation across high-frequency regimes (12–18 GHz). Ti₃C₂Tₓ MXene emerges as a promising candidate but is plagued by significant impedance discrepancies arising from its extraordinarily large permittivity. Herein, a dual-regulation strategy integrating crystal phase engineering and heterointerface design is proposed. Systematic investigations on Ti₃C₂Tₓ-MXene and derived ZnO/TiO₂ ternary composites reveal that 20 wt% filler loading yields optimal impedance matching, achieving a minimum reflection loss (RL min ) of –20.72 dB at 8.32 GHz. To further enhance performance, a ternary system was constructed via gradient-temperature treatment (300, 700, and 800 °C), enabling controlled TiO₂ phase evolution. The ZTM-2 sample (700 °C) exhibits exceptional performance at 1.4 mm thickness, with RL min of –47.54 dB and an effective bandwidth of 2.72 GHz. This is ascribed to the synergy of strong interfacial polarization, dipole relaxation from ZnO defects, and modulated dielectric properties. Rational regulation of filler concentration and microstructure effectively balances impedance matching and loss capability, offering new strategies for high-performance MXene-based absorbers.
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JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2023
·
IF 6.1
Haifeng Bian,Guoli Zhang,Qingxi Zhai,Yanyan Du,Yujie Ma,Beibei Yang,Shaochun Tang,Duan Bin,Xiangkang Meng,Hongbin Lu
Stainless steel (SS) is a promising material for designing bipolar plates (BPs), but their further application is limited by serious corrosion problems in the acidic environment. Ti 3 C 2 T x is expected to be used for SS BPs coatings, while galvanic corrosion will occur after the damage of Ti 3 C 2 T x coating. Herein, a PPY/Ti 3 C 2 T x -AE double-layer coating (DC) is well-designed and prepared on 304SS BP, which is composed of an inner electropolymerized PPY layer and an outer Ti 3 C 2 T x -acrylic epoxy layer. When tested in 0.2 M HCl solution, the corrosion potential and corrosion current density of the DC are 38 mV and 0.00927 μA cm −2 respectively, which are superior to those of the PPY coating and the Ti 3 C 2 T x coating. Moreover, the DC presents the best long-term stability among the three coatings. The excellent corrosion resistance is attributed to the barrier and anodic protection effects as well as the solution of galvanic corrosion. The new coating system provides a new insight into the design of DC coatings of SS BPs.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Qing-Ming Wang,Jin-Chang Lin,Zhen-Hui Liu,Qiu-Feng Lü
Ti 3 C 2 T x -based modified separation materials are widely used in the field of wastewater separation, but most of them have poor fluxes. Here, grafting of l -cysteine and l -histidine onto polydopamine-pretreated Ti 3 C 2 T x surface was used to obtain amino acid-modified Ti 3 C 2 T x (L-CPT and L-HPT), respectively, by covalent and non-covalent bonds under mild conditions, enriching variety and number of hydrophilic groups on the Ti 3 C 2 T x surface. Polyurethane sponge (PU) coated with L-CPT and L-HPT (L-CPTPU and L-HPTPU) exhibit excellent underwater oleophobicity and show impressive separation efficiency (>99.4%) for various oil-water mixtures. Especially, L-CPTPU and L-HPTPU achieved high-throughput separation for cyclohexane-water mixtures with maximum permeation fluxes of 220,319 and 222,197 L m -2 h -1 , respectively, and had excellent resistance to corrosive media. Besides, polyamide membranes modified with L-CPT and L-HPT (L-CPTPA and L-HPTPA) form abundant permeation channels, achieving high-efficiency separation for toluene in water emulsion with separation efficiency greater than 99.1%. In addition, L-CPTPA and L-HPTPA exhibited remarkable rejection (>99.1%) and high permeability (>1100 L m -2 h -1 bar -1 ) for 20 mg L -1 malachite green solution. Therefore, the amino acid-modified Ti 3 C 2 T x can functionally modify PU and PA substrates toseparate oily wastewater and dye wastewater, respectively.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shuqian Xie,Jinbing Shu,Hui Huang,Junhong Li,Ruirui Yue,Jingkun Xu
Improving the electrocatalytic performance by modulating the surface and interface electronic structure of noble metals is still a research hotspot in electrocatalysis . Herein, we prepared the heterogeneous catalyst based on the well-dispersed PdCu nanoalloy and the N -doped Ti 3 C 2 T x MXene support (PdCu/N-Ti 3 C 2 T x ) via in situ growth of PdCu nanoparticles on the fantastic N-Ti 3 C 2 T x sheets. By exploring the electrocatalytic properties of ethanol oxidation reaction (EOR), the composition optimized Pd 1 Cu 1 /N-Ti 3 C 2 T x delivers higher mass activity/specific activity/intrinsic activity (2200.7 mA mg Pd -1 /13.1 mA cm −2 /2.2 s −1 ), anti-poisoning ability and stability than those of Pd/N-Ti 3 C 2 T x , Pd 1 Cu 1 /Ti 3 C 2 T x and commercial Pd/C, which can be attributed to the modified surface electronic features of Pd by the participation of Cu atoms and N-Ti 3 C 2 T x MXene , as well as the “metal-carrier” effect between the PdCu nanoalloy and N-Ti 3 C 2 T x heterogeneous interface. Furthermore, the conductivity of N-Ti 3 C 2 T x MXene can be improved by N -doping, and the abundant terminal groups (-O, –OH, -F and N) on the N-Ti 3 C 2 T x surface can promote the electron exchange between PdCu and N-Ti 3 C 2 T x . This work provides an effective strategy for engineering heterogeneous electrocatalysts for enhanced electrocatalytic EOR by adjusting the interfacial electronic structure of noble metals.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Linsen Li,Xiang Gong,Zhuwei Yang,Riguang Zhang,Zhao Jiang,Tao Fang
As the candidates for large-scale hydrogen storage , liquid organic hydrogen carriers (LOHCs) exhibit evident advantages in hydrogen storage density and convenience of storage and transportation. Among them, NECZ (N-ethylcarbazole)/12H-NECZ (dodecahydro-N-ethylcarbazole) is considered as a typical system with the lower hydrogenation/dehydrogenation temperature. However, the low dehydrogenation efficiency restrict its commercial applications. In this work, the single-layer Ti 3 C 2 T x MXene was employed as the support to load the Pt nanoparticles for the 12H-NECZ dehydrogenation reaction. The effect of transition metals , loading amounts and morphologies of catalysts were analyzed. It was found that the 3 wt% Pt/S–Ti 3 C 2 T x catalyst exhibited the best catalytic performance with 100% conversion, 91.55% selectivity of NECZ and 5.62 wt% hydrogen release amount at 453 K, 101.325 kPa for 7 h. The product distributions and kinetics analysis suggested that the elementary reaction from 4H-NECZ to NECZ was the rate-limiting step. The selectivity of NECZ is sensitive to the dehydrogenation temperature. Combined with the XRD , SEM , HRTEM , XPS , BET and FT-IR results, it could be indicated that the special two-dimension structure of S–Ti 3 C 2 T x and electronic effect between Pt and S–Ti 3 C 2 T x enhanced the dehydrogenation efficiency of 12H-NECZ. The measurements of cyclic dehydrogenation indicated that the Pt/S–Ti 3 C 2 T x catalyst exhibited good stability after 42 h. This work brought a new strategy for the design of efficient catalysts using two-dimensional materials in the applications of the liquid organic storage hydrogen technology .
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POLYMER
·
2023
·
IF 4.6
Kefan Fan,Kun Li,Liuwenlin Han,Zhijian Yang,Junjiao Yang,Junying Zhang,Jue Cheng
The advent of hydrogel-based flexible strain sensors has generated enormous research interest due to their outstanding biocompatibility. However, developing hydrogel-based strain sensors with high gauge factor, wide detection range and multifunctional integration is still challenging. Here, a novel multifunctional hydrogel-based strain sensor is composed of two-dimensional transition metal carbides/nitrides (Ti 3 C 2 Tx MXene) and Polyacrylamide- co -Poly- N -hydroxyethylene acrylamide/Carboxy Methyl Cellulose-Fe 3+ dual network structure (PAAm-PHEMAA/CMC-Fe 3+ ) with multiple hydrogen bonds and coordination interactions. The dual network design endowed the hydrogel-based human motion sensor with fast rebound and high tensile properties , enabling it to exhibit high sensitivity (response time ∼120 ms and gauge factor ∼1.62), and a wide detection range (0–700%), including joint movements as well as more subtle human motions (facial micro-expression changes and speech). More importantly, the hydrogel-based strain sensor exhibited excellent EMI (41 dB, X-band) and UV shielding properties (365 nm, 100%, 0.5 mm) due to the synergy of porous structure, moderate conductivity, and ionic solution environment. Moreover, it demonstrated robust adhesion (29 kPa), high shape adaptability, and self-healing capability. This innovative multi-functional flexible sensor design provides guidance for the development, research and application of high-performance flexible wearable materials.
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Nanoscale
·
2022
·Vol. 15
·期 6
·2624-2632
·
IF 8.307
Weijia Liu,La Li,Guozhen Shen
Frequently used aqueous electrolytes in MXene-based Zn-ion hybrid microsupercapacitors (MSCs) limit their cycling and rate stability. The use of metal and nonmetal additives in electrolytes for the performance improvement of Zn-ion MSCs is considered a valid method. Herein, we propose an additive assisted Zn(CF3SO3)2 electrolyte as a redox-active electrolyte to prepare a flexible MXene-based Zn-ion hybrid MSC by a facile spraying method, and it consists of a conductive Ti3C2Tx–LiCl current collector and a Ti3C2Tx–DMSO cathode. In the process of the current density change (from 5 A cm−3 to 30 A cm−3 and then to 5 A cm−3), the capacity retention of the as-fabricated MSC with K3Co(CN)6 additive is over 99.0%, which is higher than 96.7% for the MSC with CKNSe additive and 82.3% for the MSC without an additive. Moreover, the designed MSC with the redox-active K3Co(CN)6 electrolyte exhibits a maximal capacitance retention of 70% after 5000 cycles. Furthermore, the flexible Zn-ion MSC with the Ti3C2Tx MXene cathode and a redox-active electrolyte was used to power a Ti3C2Tx based pressure sensor; the excellent press response of the integrated system not only provides insights into the development of large capacity and long-period stable energy storage devices, but also paves a new way for the development of capacitor-sensor integrated systems.
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COMPOSITES COMMUNICATIONS
·
2022
·
IF 7.685
Dan Wang,Yidong Peng,Jiancheng Dong,Lei Pu,Kangqi Chang,Xiu-Ping Yan,Hai-Long Qian,Le Li,Yunpeng Huang,Tianxi Liu
Thermally insulating and flame-resistant fibers/textiles have drawn enormous attention attributing to their great application prospects in personal thermal management and protective clothing. Nevertheless, conventional natural fibers and synthetic fibers are insufficient for advanced thermal regulation. Herein, an in-situ polymerization method and wet-spinning technique are employed for the continuous and scalable fabrication of polyimide (PI) aerogel fibers utilizing monolayered Ti 3 C 2 T x flakes as the pore-generating agents. Benefiting from the intimate interfacial interaction between MXene and the macromolecular chains, hierarchical porosity is constructed in the composite aerogel fibers due to the confinement of the interconnected PAA/Ti 3 C 2 T x networks during liquid-solid phase separation. As a result, the PI/Ti 3 C 2 T x aerogel fibers manifest significantly enhanced mechanical properties (tensile strength of 26 MPa), large specific surface area (145 m 2 g −1 ), excellent flame resistance, and remarkable thermal insulation performance (with a low thermal conductivity of 36 mW m −1 K −1 ), which can be readily weaved into flexible textiles for practical thermal regulating applications. This approach is expected to pave a new way for the fabrication and application of high-performance thermal insulating fibers and textiles.
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Acta Biomaterialia
·
2023
·
IF 9.7
Tao Liao,Zhongyin Chen,Ying Kuang,Zhe Ren,Wenqian Yu,Wen Rao,Linwei Li,Yun Liu,Ziqiang Xu,Bingbing Jiang,Cao Li
As a controllable, simple method with few side effects, near-infrared (NIR) light-based photothermal therapy (PTT) has been proven an effective cancer therapeutic approach. However, PTT-induced inflammation is a potential negative factor. And the overexpressed heat shock proteins (HSPs) by cancer cells can protect them from hyperthermia during PTT. In this work, small-size Ti 3 C 2 T x MXene nanosheets with high photothermal conversion efficiency in the region of NIR, high cargo loading capability and good free radical scavenging capability were chosen for cancer PTT and anti-inflammation. And (-)-epigallocatechin gallate (EGCG) was applied to form EGCG/Fe metal-polyphenol nanodots on the nanosheets. EGCG being released in acid cancer cells could reduce the expression of HSPs and could be used for anti-inflammation. As a result, the complex nanosheets named MXene@EGCG could achieve enhanced cancer PTT and be anti-inflammatory. Both in vitro and in vivo studies proved the good photothermal ability of MXene@EGCG and demonstrated that it could inhibit the expression of HSPs in tumor cells and relieve PTT-induced inflammation. Therefore, the nanosheets show good results in tumor ablation with a low level of inflammation, which provides another possibility for cancer therapy. Statement of significance Photothermal therapy (PTT)-induced inflammation plays an essential role in some important stages of tumor development and is unfavorable for cancer treatment. And hyperthermia leads to the overexpression of heat shock proteins (HSPs) in cancer cells, which limits the therapeutic effect of PTT. Therefore, we coated small-size Ti 3 C 2 T x MXene nanosheets with (-)-epigallocatechin gallate (EGCG)/Fe metal-polyphenol nanodots and named them as MXene@EGCG. This system shows a good photothermal conversion efficiency at 808 nm. And it can release EGCG in cancer cells to inhibit the expression of HSPs, thus achieving an enhanced cancer PTT. Both MXene and EGCG can also diminish the PTT-trigged inflammation. Both in vitro and in vivo studies prove the good anti-cancer PTT effect and anti-inflammation capability of MXene@EGCG.
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Materials
·
2023
·Vol. 16
·期 24
·7583
·
IF 3.4
Zhuluni Fang,Qingyang Zhou,Wenbo Zhang,Junyi Wang,Yihan Liu,Miao Yu,Yunfeng Qiu,Zhuo Ma,Shaoqin Liu
In response to the trend of drug−resistant and super bacteria, the existing single antibacterial methods are not sufficient to kill bacteria, and the development of multifunctional antibacterial nanomaterials is urgent. Our study aims to construct copper−doped polydopamine−coated Ti3C2Tx(CuPDA@Ti3C2Tx) with an enhanced photothermal property and Fenton−like activity. The nanocomposite hydrogel consisting of CuPDA@Ti3C2Txand alginate can improve the antioxidant activity of two−dimensional MXene nanosheets by coating them with a thin layer of PDA nanofilm. Meanwhile, Cu ions are adsorbed through the coordination of PDA−rich oxygen−containing functional groups and amino groups. Calcium ions were further used to crosslink sodium alginate to obtain antibacterial hydrogel materials with combined chemotherapy and photothermal therapy properties. The photothermal conversion efficiency of CuPDA@Ti3C2Txis as high as 57.7% and the antibacterial rate ofEscherichia colireaches 96.12%. The photothermal effect leads to oxidative stress in bacteria, increases cell membrane permeability, and a high amount of ROS and copper ions enter the interior of the bacteria, causing protein denaturation and DNA damage, synergistically leading to bacterial death. Our study involves a multifunctional synergistic antibacterial nanodrug platform, which is conducive to the development of high−performance antibacterial agents and provides important research ideas for solving the problem of drug−resistant bacteria.Keywords:MXene;polydopamine;Fenton−like activity;photothermal effect;antibacterial
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 38
·20651-20664
·
IF 11.9
Fangfang Su,Zhongjie He,Jinliang Xie,Jing Zhang,Weirui Zhang,Yangyang Xin,Aibo Zhang,Dongdong Yao,Yaping Zheng
In recent years, solar energy has gained significant attention due to its clean, abundant, and renewable characteristics. Among various solar energy applications, solar thermal conversion has emerged as one of the most promising and straightforward methods. As a new type of photothermal material, MXene has been widely studied, but its low layer roughness and high reflection coefficient result in weak light–thermal conversion performance. In this work, we prepared nanofluids (hereafter named “Ti3C2Tx/FCuS-IL” and “Ti3C2Tx/HCuS-IL”) for light–thermal conversion by utilizing electrostatic interactions between polydopamine modified Ti3C2Tx and CuS composite photothermal materials (Ti3C2Tx/FCuS and Ti3C2Tx/HCuS) with [EBIM]NTf2. The introduction of floral and hollow CuS can effectively increase the surface roughness of Ti3C2Tx, thereby increasing the light receiving area of the material. Research has demonstrated that ionic liquids (ILs) can serve as effective heat collecting working fluids, expanding the liquid path range of nanofluids and providing them with enhanced thermal stability. Furthermore, ILs exhibit lower viscosity, which is advantageous for their efficient pumping in various industrial applications. Research on the light absorption performance and light–thermal conversion performance has found that the Ti3C2Tx/FCuS-IL and Ti3C2Tx/HCuS-IL nanofluids could achieve complete spectral absorption at lower mass fractions of 0.08% and 0.10%, respectively, and exhibited a faster heat transfer rate. The equilibrium temperature (Teq) that Ti3C2Tx/FCuS-IL (0.08%) could achieve was 80.2 °C at 1 sun, with a light–thermal conversion efficiency (ηLTC) of up to 94% and good cycling stability. Additionally, the evaporation performance of Ti3C2Tx/FCuS-IL (0.12%) and Ti3C2Tx/HCuS-IL (0.12%) had been improved by 148.6% and 134.3% compared to pure water at 1 sun. The outstanding light–thermal conversion performance of these nanofluids holds great potential advantages in various applications, such as seawater desalination, cancer treatment, hydrophobic anti-icing, and more.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2023
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IF 3.3
Zhimin He,Zhengjie Tan,Yu Pu,Qiyu Li,Wei Hong,Rong Li,Xinglong Gou
Ti 3 C 2 T x nanosheets arrays sandwiched with FeNi 2 S 4 nanoparticles are in-situ grown on Ni-Fe foam (FeNi 2 S 4 -Ti 3 C 2 T x @NFF) via a facile one-pot hydrothermal route. The as-prepared FeNi 2 S 4 -Ti 3 C 2 T x @NFF exhibits simultaneously excellent catalytic activity towards oxygen and hydrogen evolution reactions with low overpotentials (136 and 97 mV at 10 mA cm -2 , respectively) and superior stability. Moreover, a symmetrical electrolyzer utilizing FeNi 2 S 4 -Ti 3 C 2 T x @NFF as the anode and cathode only requires 1.51 V for overall water splitting to reach 10 mA cm -2 , and can continuously operate at 20 mA cm -2 for 100 h. The outstanding catalytic performance of the catalyst can be attributed to increased active sites in the well-dispersed FeNi 2 S 4 nanoparticles, enhanced electronic conductivity due to introduction of Ti 3 C 2 T x nanosheets, strong electronic coupling between Ti 3 C 2 T x and FeNi 2 S 4 , improved mass transfer through the hierarchically porous structures and robust self-supporting configuration.
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