JOURNAL OF POWER SOURCES
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2026
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IF 8.4
Shenglin Cheng,Yunfei Dong,Xuan Liu,Zengjie Wang,Xiang Li,Jilai Xue
Parasitic hydrogen evolution reaction (HER) and anode passivation are two intertwined challenges that profoundly limit the energy efficiency and operational lifespan of alkaline aluminum-air (Al-air) batteries. Here, we construct a uniform Ti 3 C 2 T x MXene functional layer on pure aluminum (Al) surface via a facile solution-immersion self-assembly process. The assembled MXene architecture acts a highly effective, selective interfacial regulator with state-dependent dual-functionality. During open-circuit standby, its unique 2D structure impedes water reduction, yielding a ∼46% reduction in the HER rate (from 0.129 to 0.070 ml cm −2 ·min −1 ). Conversely, during discharge, the intrinsically conductive MXene framework facilitates highly uniform anodic dissolution. Consequently, in static alkaline cells (10 mA cm −2 ), the MXene-Al anode delivers an exceptional specific capacity of 2216 mAh·g −1 and an energy density of 3303 Wh·kg −1 , substantially outperforming pure Al (1350 mAh·g −1 , 1818 Wh·kg −1 ). Furthermore, under cyclic on/off discharge with electrolyte flow, the functionalized anode extends operational lifetime by roughly one-third (from 82 to 111 h). Post-discharge characterization confirms that the MXene layer remains structurally intact on the Al surface after prolonged operation. These results establish solution-assembled MXene functional layers as a practical approach for simultaneously addressing HER and passivation in alkaline Al-air batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
·
IF 12.5
Mengxiang Liu,Mengle Li,Ziqian Xu,Miao Li,Jiale Fan,Yu Zhang,Kaibo Yu,Zihan Kong,Tao Zhang,Xiaoxiao Huang
Interfacial polarization tuning via BO x F y modification and in situ N-doped carbon • Synergistic interfacial polarization for dielectric response and impedance matching • Minimum reflection loss of −58.97 dB with a bandwidth of 4.24 GHz Pristine Ti 3 C 2 T x MXene generally suffers from severe impedance mismatch arising from its excessive electrical conductivity, which fundamentally limits efficient electromagnetic wave (EMW) attenuation. Herein, an interfacial modulation strategy is proposed by integrating fluorinated boron oxide (BO x F y ) nanophases and in situ derived N-doped carbon into a Ti 3 C 2 T x MXene framework through a hydrothermal process. Distinct from conventional boron-containing modification, the introduced BO x F y species provide abundant polarization-active sites and tailor the local interfacial environment through the coexistence of B O and B F coordination, thereby improving dielectric polarization and impedance matching. Meanwhile, the in situ formed N-doped carbon establishes defect-rich conductive networks, enabling balanced conductive loss and dipolar polarization. More importantly, the synergistic coupling among BO x F y nanophases, N-doped carbon, and Ti 3 C 2 T x MXene constructs abundant heterogeneous interfaces and multiscale conductive pathways, facilitating interfacial polarization and electromagnetic energy dissipation. As a result, the optimized BN(1:1)-MXene achieves a minimum reflection loss of −58.97 dB at 1.77 mm and an effective absorption bandwidth of 4.24 GHz. Furthermore, radar cross-section simulations demonstrate remarkable electromagnetic scattering suppression with a maximum reduction of 32.05 dB m 2 at normal incidence. This work highlights the synergistic effects of interfacial modulation on electromagnetic attenuation, offering a promising strategy for high-performance MXene-based EMW absorbers. Download: Download high-res image (320KB) Download: Download full-size image
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Journal of Energy Storage
·
2026
·
IF 10.7
Kui Cao,Yue Han,Fanen Zeng,Xin Wu,Yang Sun,Zihao Zhang,Xiuna Xue,Yu Shen,Bing Xu
The emergence of Ti 3 C 2 T X as a novel two-dimensional transition metal carbide catalyst support has sparked widespread research interest due to its high electrical conductivity and tunable surface chemistry. To address the inherent interlayer stacking limitations of conventional Ti 3 C 2 T X , the single-layer Ti 3 C 2 T X (SL-Ti 3 C 2 T X ) support was prepared via selective etching of aluminum from bulk Ti 3 AlC 2 , followed by liquid-phase exfoliation of multilayered Ti 3 C 2 T X into nanosheets. Subsequently, a high-performance Pt/SL-Ti 3 C 2 T X composite electrocatalyst was synthesized by in situ reducing Pt 2+ into Pt nanoparticles (Pt NPs) through an ethylene glycol-mediated reduction method. Electron microscopy analyses demonstrated that Pt NPs (~2.89 nm size) uniformly loaded on the wrinkled surface of SL-Ti 3 C 2 T X nanosheets with thickness of 1.5 nm. Raman spectrum analysis revealed the functionalization of the support SL-Ti 3 C 2 T X (T X : O, -OH and F), while the strong metal-support interaction (SMSI) between Pt NPs and SL-Ti 3 C 2 T X was indicated through XPS patterns of the sample. With an electrochemical active surface area (ECSA) of 176 m 2 ·g −1 and a half-wave potential (E 1/2 ) of 0.874 V, the produced composite catalyst outperformed Pt‑carbon (Pt/C) catalyst in acidic electrolytes in terms of oxygen reduction reaction (ORR) performance. After undergoing 30,000 cycles of accelerated durability testing (ADT), the Pt/SL-Ti 3 C 2 T X catalyst maintained 77% of its initial activity, with a mass activity loss of only 22%, while the corresponding data for Pt/C are 51% and 48%, respectively. Based on its unique advantages including the single-layer structure and surface functionalization, SL-Ti 3 C 2 T X could be used as a high-performance catalyst support to produce highly active and stable electrocatalysts for ORR in energy conversion field.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Rong Ma,Xiaochun Tao,Shuo Li,Chenglong Chen,Qinqin Liu,Shaosheng Rao,Juan Yang
Two-dimensional (2D/2D) heterojunction photocatalysts hold great promise for solar-driven antibacterial disinfection owing to their unique interfacial architectures and tunable electronic properties. However, insufficient interfacial electronic coupling and ineffective charge separation still hinder their practical performance. Here, a sulfur-doped g-C 3 N 4 /Ti 3 C 2 Tx-MXene (SCN/MXene) 2D/2D heterojunction is rationally designed to enable efficient charge separation and transfer, delivering superior solar-driven antibacterial activity with remarkable stability. Combined experimental and theoretical analyses reveal that sulfur doping modulates the electronic structure of g-C 3 N 4 , elevates its Fermi level, and strengthens interfacial electronic coupling with Ti 3 C 2 Tx-MXene, thereby enhancing the built-in electric field and facilitating charge transfer across the interface. Moreover, S-doping induces interfacial charge redistribution, enhancing O 2 adsorption and activation at Ti sites and thereby accelerating the generation of reactive oxygen species (ROS). Consequently, SCN/MXene achieves nearly complete inactivation of Escherichia coli , Staphylococcus aureus , and methicillin-resistant Staphylococcus aureus within 60 min under solar irradiation, outperforming most of the state-of-the-art photocatalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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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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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
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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
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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
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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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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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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 32
·10973-10984
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IF 6.4
Ming Du,Shilei Ji,Canhui Qian,Lutao Li,Wei Chen,Huajie Huang,Jianping Yang,Jian Zhang,Xinbao Zhu,Xing’ao Li
The accessibility of photogenerated charge transfer channels and the activity of catalytic reaction sites are critical for efficient hydrogen evolution reaction (HER). Herein, a 3D porous N-doped Ti3C2Tx MXene matrix confining Cd0.5Zn0.5S nanoparticles (N-TCT@CZS) was fabricated via electrostatic absorption, thermal nitridation, and in situ growth processes, forming a stable heterojunction with excellent photocatalytic HER activity. Comprehensive experimental and theoretical analyses indicated that N dopants could induce more unsaturated structures and increase the abundance of active sites, while the 3D N-TCT MXene matrix with a stable scaffold configuration and interconnected porous channels could promote charge transfer kinetics, which synergistically realizes electronic structure modulation and spatial configuration design of photocatalysts. Besides, the Cd–N bonds between the N-TCT MXene and CZS enhance the interfacial interaction and expedite the directional interfacial charge transfer, thus substantially boosting photocatalytic hydrogen evolution. Consequently, the optimal N-TCT@CZS-3 nanohybrid photocatalyst possesses a superior photocatalytic HER rate of 10.90 mmol g−1 h−1, which is 4.8 times higher than that of the pristine CZS nanoparticles. This work proposes an applicable avenue for designing and fabricating novel functional 3D MXene-supported semiconductor materials for solar energy conversion.
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Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 38
·14169-14179
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IF 8.067
Zhenping Ma,Hui Feng,Yongbao Feng,Xin Ding,Xianzhen Wang,Wei Wang,Xiaojie Zhang,Shuo Kong,Xiong Lan,Qiulong Li
Lightweight high-performance electromagnetic interference (EMI) shielding materials with excellent thermal conductivity and outstanding EMI shielding performances are highly satisfactory for modern integrated electronic and telecommunication systems in the fields of military, aerospace, smart and wearable electronics, and artificial intelligence. Herein, we prepared a cellular MXene@silver nanowire (Ag NW) composite film by a simple vacuum-assisted filtration process induced by potassium ions and freeze-drying after rapid pre-freezing with liquid nitrogen. The construction of the cellular structure can effectively improve the shielding effectiveness. Upon introducing the Ag NWs in the system, the interconnection networks were constructed for the MXene@Ag NW composite film, which significantly improved the electrical and thermal conductivity, further enhancing EMI shielding performance. The composite film with 80 wt% Ag NWs can deliver a high conductivity of 1245 S cm−1, ultrahigh EMI shielding efficiency (SE) of 81.11 dB in the X-band, and a high thermal conductivity of 26.19 W m−1 K−1. The prepared MXene@Ag NW cellular composite film has the advantages of high shielding efficiency and good thermal conductivity, which has important application value in manufacturing lightweight, high shielding efficiency materials and avoiding heat accumulation of electronic devices.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 10
·5505-5519
·
IF 14.511
Xu Tian,Lijia Yao,Xiuxiu Cui,Rongjun Zhao,Ting Chen,Xuechun Xiao,Yude Wang
Two-dimensional nanomaterials have exhibited considerable potential for gas sensing applications in recent years owing to their unique physical and chemical properties such as a large surface-to-volume ratio, abundant edge sites, versatile surface chemistry, etc. Herein, we demonstrate a two-dimensional Ti3C2TX MXene@TiO2/MoS2 nanocomposite gas sensor for ammonia detection at room temperature. MoS2 nanosheets are grown on an etched Ti3C2TX MXene surface by a hydrothermal method, and rectangular TiO2 particles are derived from Ti3C2TX MXene in the hydrothermal process. Meanwhile, nanocomposites with different Ti3C2TX MXene additions are also designed for gas sensing performance comparison. Such a novel hierarchical structure based gas sensor (MTM-0.2 sensor) exhibits fast response/recovery time and excellent long-term stability to ammonia. Meanwhile, outstanding selectivity to ammonia against triethylamine, trimethylamine, n-butanol, acetone, formaldehyde, and nitrogen dioxide at room temperature is also shown. The sensor shows 1.79-fold and 2.75-fold enhancement in the gas sensing response toward 100 ppm ammonia compared with the pristine Ti3C2TX MXene and MoS2 gas sensors, respectively. And its detection limit for ammonia is 500 ppb. The sensing mechanisms of the Ti3C2TX MXene@TiO2/MoS2 nanocomposites toward ammonia are attributed to the layered nanostructure, p–n heterojunction created at the interface of p-type Ti3C2TX MXene and n-type MoS2. Finally, density-functional theory (DFT) is performed to investigate the adsorption behavior and charge transfer of ammonia molecules on the surface of the nanocomposite. The synthesized Ti3C2TX MXene@TiO2/MoS2 nanocomposite can be regarded as a promising candidate for high-performance ammonia detection at room temperature.
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