WEAR
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2025
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IF 6.1
Sudesh Singh,Tianyi Han,Xinchun Chen,Chenhui Zhang
Although MXene and MoS 2 individually possess outstanding anti-friction and wear-resistant properties in numerous applications, the combination of both in the recent past has created a new frontier in cutting-edge applications. The current work insights into the impregnation of porous alumina ceramics in the MXene (1 wt %), MoS 2 (1 wt %), and hybrid (0.5 wt % MXene +0.5 wt % MoS 2 ) solution to fabricate self-lubricating alumina composites via vacuum impregnation method and afterward exploring the mechanical as well as tribological properties of the synthesized composites. A significant strengthening of the matrix for impregnated composites was observed compared to unimpregnated porous ceramics. The impregnated composites were slid against the zirconia ball to assess the friction behavior. The results revealed that the ceramics impregnated with MXene only can reduce COF by ∼43 % of that unimpregnated ceramics; however, in conjunction with MoS 2, the reduction can be lowered to ∼70 % attributed to synergistic effect of MXene and MoS 2 to form the tribo-layer over interacting surfaces. The study concludes that hybrid (MXene/MoS 2 ) impregnation of porous ceramics exhibits excellent self-lubricating properties over other impregnations, making them suitable candidates for advanced tribological applications. This novel combination leverages the unique properties of MXene and MoS 2 to enhance the longevity and performance of porous ceramics in demanding operational environments.
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高影响因子
Materials Today Physics
·
2025
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IF 9.7
Xu Zhou,Xiao-Ai Ye,Jia-Qi Zhu,Gui-Gen Wang
Conductive hydrogels with water-enriched pores have shown great potential in electromagnetic wave protection and flexible wearable electronics. However, hydrogel with high water content often results in some challenges such as water loss and low-temperature freezing. In this study, porous gelatin/ChCl/MXene Ti 3 C 2 T x (GCM) hydrogels were prepared via a facile one-pot method. The introduction of ChCl forms abundant hydrogen bonds in GCM hydrogels, which endows the hydrogels long-term anti-drying (30 days) and anti-freezing abilities (−30 °C). Due to the synergistic effects of the porous structure, highly conductive MXene and water molecules, the electromagnetic interference (EMI) shielding effectiveness (SE) reach up to 108 dB in the X-band. Significantly, the effect of water molecules on EMI SE is quantified by adjusting the water content in hydrogel. Moreover, the gelatin-based hydrogel exhibits super-elasticity (0.25 MPa at 80 % strain) and demonstrates no significant decrease in EMI SE after 500 compression cycles. Finally, the excellent pressure-sensing properties of GCM hydrogel enable sensitive and reliable detection in human motion and smart coding. Therefore, the developed GCM hydrogel demonstrates promising application prospects in the fields of EMI shielding and sensing for wearable electronic devices.
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高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Yun Bai,Yuanjie Gu,Jiayue Chen,Yiying Yue
Solar-driven desalination has received considerable attention as a promising approach to alleviate water scarcity due to its environmental friendliness and energy efficiency. In this study, an efficient biomass-based evaporator was developed through coordinating diatomite and titanium carbide MXene (Ti 3 C 2 T x ) on delignified coconut husk. Owing to the numerous hydroxyl and carboxyl groups present on the surfaces of diatomite, MXene, and the cellulose in coconut husks, the introduction of these additional hydrophilic groups stimulated water activation, thereby increasing the proportion of intermediate water. The excellent structural design and constituent materials of the evaporator contributed to reducing the evaporation enthalpy of water by approximately 18%. In addition, the obtained evaporator was light weight, remarkably strong, and exhibited an excellent light absorption capacity (∼91.48%), low thermal conductivity (0.04716 W m −1 K −1 ), and low evaporation enthalpy (∼1854 J g −1 ). The resultant evaporator delivered a water evaporation rate of 2.1 kg m −2 h −1 and a photothermal conversion efficiency of 90.64% under 1 sun exposure. The evaporator exhibited remarkable durability, salt resistance, metal ion adsorption, and dye removal properties. Therefore, this study provides a novel approach to realize the high-value utilization of waste coconut husks that is promising for solar steam generation applications.
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Li Liu,Tao Chen,Liping Han,Zhuo Qian,Junpeng Li,Guoyou Gan
The Thermal Conductive Silver Adhesive (TCSA) efficiently transfers heat from electronic components to heat dissipation components, preventing overheating and extending device lifespan. Despite the effectiveness of commercial sintered nano TCSA, high production costs necessitate a more affordable, high-performance preparation method. This study presents a strategy for preparing ultra-high thermal conductivity (TC) TCSA using multidimensional thermal conductive fillers and low-temperature sintering of silver nanoparticles (AgNPs). MXene@AgNPs particles are synthesized via in-situ reduction of AgNPs on MXene surfaces. These particles, combined with silver microflakes (AgMFs) as primary fillers and epoxy (EP), undergo low-temperature heat treatment to form the AgMFs-MXene@AgNPs/EP composite. Characterization and computational models show that filler-filler interface thermal resistance (ITR f-f ) is critical for TC. Adding MXene alone is insufficient, but using MXene@AgNPs particles as secondary fillers allows AgNPs to interconnect fillers, effectively reducing the ITR f-f . The resulting composite achieves an ultra-high TC of 65.51 Wm −1 K −1 with 63 wt% total filler content (60 wt% AgMFs, 3 wt% MXene@AgNPs). This study advances the development of low-cost, high-performance TCSA for thermal management applications.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Wang Guo,Zhiqiang Ma,Zhou Chen,Haojun Hua,Dong Wang,Mohamed Elhousseini Hilal,Yatian Fu,Pengyi Lu,Jian Lu,Yuanting Zhang,Derek Ho,Bee Luan Khoo
Increasing demand for flexible sensors in healthcare has spurred the development of nanomaterial-polymer composite sensors. However, existing pressure sensors suffer from low sensitivity due to poor interactions between the functional filler and the polymer matrix. For example, the direct chemical bonding of nanomaterials to the surface of chemically inert polymers such as polydimethylsiloxane (PDMS) is not easily achieved. Herein, we demonstrate that MXene can significantly promote the sensitivity of a thin and soft piezoresistive sensor based on a surface functionalized PDMS (FPDMS) sponge. Using plasma treatment, we constructed a MXene-FPDMS (MFP) sponge with high mechanical strength via the interlayer hydrogen bonding effect. The formed MFP sponge structure (∼450 μm in thickness) endows the pressure sensor with a high sensitivity of 14.2 kPa −1 and a low modulus of 9.7 kPa, critical for detecting ultra-low pressures. When operated with deep learning algorithms, the MFP sponge sensor successfully classifies the pronunciation of 26 letters and various polite expressions with an average accuracy of 94 ± 0.6 %. We envision that this work paves the way for the development of intelligent wearable platforms.
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ACS Applied Nano Materials
·
2024
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IF 5.3
Yajing Wang,Wennan Yan,Ji Zhang,Ziyi Li,Yingshu Guo
Starvation therapy mediated by glucose oxidase is a widely used therapeutic approach for tumor treatment, but it is limited by the simultaneous drawbacks of weak therapeutic efficacy, nonspecificity, and systemic toxicity. Thus, combination therapy was used to complement the widely used therapeutic strategy for anticancer therapy. On the basis of starvation therapy, we designed a catalytic model of nanosheets with biological cascade enzymes synergizing with anticancer drugs. In short, two cascade enzymes (glucose oxidase and horseradish peroxidase) are covalently immobilized on Ti3C2 MXene nanosheet and a cascade enzyme nanoreactor is formed by electrostatically adsorbing positive charged DOX. Finally, the outer layer is coated with hyaluronic acid. By combining glucose oxidase-mediated starvation therapy, photothermal therapy, and chemotherapy, we have achieved the therapeutic effect of “killing three birds with one stone” by combining the dual stimulation response of endogenous and exogenous sources to the tumor site. This method not only achieves the targeting of cancer cells but also improves the systemic toxicity and reduced efficacy of biological enzymes and realizes synergistic cancer therapy with enhanced cascade reactions. It opens up a new path for the research of nanomedicine.
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FOOD CHEMISTRY
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2024
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IF 8.5
Jiani Zhang,Xiaohui Guo,Jian Zhang,Xiaobing Guo,Yuying Xu,Lijuan Chen
Phoxim, extensively utilized in agriculture as an organothiophosphate insecticide, has the potential to cause neurotoxicity and pose human health hazards. In this study, an electrochemical enzyme biosensor based on Ti 3 C 2 MXene/MoS 2 @AuNPs/AChE was constructed for the sensitive detection of phoxim. The two-dimensional multilayer structure of Ti 3 C 2 MXene provides a robust framework for MoS 2 , leading to an expansion of the specific surface area and effectively preventing re-stacking of Ti 3 C 2 MXene. Additionally, the synergistic effect of self-reduced grown AuNPs with MoS 2 further improves the electrical conductivity of the composites, while the robust framework provides a favorable microenvironment for immobilization of enzyme molecules. Ti 3 C 2 MXene/MoS 2 @AuNPs electrochemical enzyme sensor showed a significant response to phoxim in the range of 1 × 10 −13 M to 1 × 10 −7 M with a detection limit of 5.29 × 10 −15 M. Moreover, the sensor demonstrated excellent repeatability, reproducibility, and stability, thereby showing its promising potential for real sample detection.
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PubMed
高影响因子
Applied Materials Today
·
2024
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IF 7.2
Qianqian Qiao,Jinyu Wang,Bingjiao Li,Yuhao Guo,Tao Liao,Ziqiang Xu,Ying Kuang,Cao Li
Photothermal therapy (PTT)-based combination therapy is an effective approach to cancer treatment. However, there is a possibility of tumor development due to the inflammation caused by PTT. In addition, hyperthermia can cause damage to normal tissues. This work reported a drug delivery/cascade enzyme system based on Ti 3 C 2 T x MXene nanosheets. Ultra-small, degradable mesoporous silica nanoparticles (DS-MSN) were prepared to load phloretin (Phl), which has anti-inflammatory, antioxidant, and anticancer properties. Subsequently, glucose oxidase (GOx) was adsorbed on the surface of DS-MSN. The nanoparticles were then modified on Ti 3 C 2 T x MXene nanosheets and finally treated with polyethylene glycol (PEG) to obtain the multifunctional system named Ti 3 C 2 T x -Phl@DS-MSN-GOx-PEG (TPDMGP). The high near-infrared photothermal conversion efficiency of Ti 3 C 2 T x made it suitable for PTT. GOx and Ti 3 C 2 T x formed a cascade enzyme system inside cancer cells: Ti 3 C 2 T x exhibited catalase (CAT)-like activity that decomposed intracellular hydrogen peroxide (H 2 O 2 ) into O 2 , which was provided to GOx for enhanced starvation therapy. GOx in the presence of O 2 produces H 2 O 2 , for the oxygen production of Ti 3 C 2 T x . Meanwhile, DS-MSN could be degraded in the reducing environment inside cancer cells as it contains disulfide bonds in its backbone, thus releasing Phl for chemotherapy. Such a combination therapy strategy could achieve a satisfactory therapeutic outcome by low-temperature PTT while evading normal tissue damage by high temperature. The anti-inflammatory effects of both Ti 3 C 2 T x and Phl enabled TPDMGP to eliminate the inflammation caused by PTT via the scavenging of reactive oxygen species (ROS). The multifunctional system is expected to generate new paradigms for cancer PTT.
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TALANTA
·
2024
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IF 5.6
Yameng Li,Peilin Wang,Huan Wang,Zhenrun Li,Zihui Liang,Qiang Ma
MiRNA-214 can regulate the expression of their downstream target genes after post-transcriptional and are involved in the biological processes of triple negative breast cancer (TNBC). In this work, the small-sized luminescent Nb 2 C nanosheet-based whispering gallery mode-enhanced electrochemiluminescence (ECL) strategy was successfully constructed to detect miRNA-214 in TNBC. Firstly, we have synthesized small-sized luminescent Nb 2 C nanosheets from Nb 2 AlC MXene. The Nb 2 C nanosheets not only exhibited more stable chemical properties and reduced the defects of the large sheet structures, but also possessed the quantum confinement effect with the discrete energy level. As a result, the prepared small-sized Nb 2 C nanosheets had unique luminescent and electrochemical properties. Furthermore, in order to improve the ECL performance of Nb 2 C nanosheets, SiO 2 microspheres were self-assembled on the electrode surface by gas-liquid interface method to form whispering gallery mode structure. Because the light was continuously reflected at the interface of the microcavity in the whispering gallery mode, the ECL signal of Nb 2 C luminescent nanosheets was amplified largely. Finally, the whispering gallery mode-based ECL sensing platform was established. The results showed that the biosensor had a good linear correlation between the ECL intensity and the logarithm of concentration of miRNA-214 in the range of 10 fM to 100 nM with a limit of detection of 2.5 fM. The actual detection of miRNA-214 content in clinical TNBC tissue samples was realized successfully.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Lei Liu,Lei He,Liping Jin,Haojie Shi,Shuhan Ye,Lingxin He,Wei Wang,Wenwen Guo
To obtain cotton fabrics with high-efficiency flame retardancy, a novel nanohybrid MXene modified with phosphorylated chitosan (CS) was successfully prepared through a simple chemical modification strategy. It was subsequently employed in the fabrication of PC@T-MXene-functionalized cotton fabric (PC@T-MXene-C) through an impregnation process. The thermal stability and flame retardancy of the pure and treated cotton textiles were analyzed via TGA, LOI, VBT flammability tests and cone calorimetry. Compared with those of the original cotton textile and PCS-decorated cotton fabric (PC-C), the thermal and flame-retardant performance of PC@T-MXene-C was significantly enhanced. When the weight gain of the treated cotton fabric was 12 % (PC@T-MXene-C3), the LOI of PC@T-MXene-C3 significantly reached 35 %, and the peak heat release rate (PHRR) and total heat release (THR) decreased by 80.7 % and 43.7 %, respectively, compared with those of the original cotton textile. Additionally, PC@T-MXene-C3 retained 39.1 % of the char residual at high temperature under a nitrogen atmosphere in the TGA analysis. This eco-friendly biomass-based flame-retardant coating provides a new strategy for fabricating green flame-retardant systems without the use of hazardous compounds.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2025
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IF 5.5
Zhaoqing Lu,Yajie Kou,Li Hua,Xiaoxu Xu,Lizhi Song,Shangjie Yu,Shan Wang,Xing-Xiang Ji,Dinggen Hu,Wei-Jing Chen
The industrialization process accelerates more and more kinds of volatile gas, with serious threats to the environment or human health having received great attention. Therefore, rapid real-time monitoring of harmful gases is urgently needed. This study investigated the gas-sensitive properties of an aramid nanofiber/MXene nanosheet (ANF/MXene) composite aerogel for detecting ammonia (NH3) at room temperature. Initially, two-dimensional (2D) MXene nanosheets were synthesized by removing Al atoms from Ti3AlC2 (MAX phase), which were then combined with ANF to produce a porous composite aerogel through freeze-drying. At room temperature, the response value of the ANF/MXene aerogel to 50 ppm of NH3 was approximately 4.96%, with a rapid recovery time (28 s), and remained stable even after 10 cycles. Additionally, the aerogel exhibited excellent long-term stability, lasting up to 45 days. Moreover, the ANF/MXene composite aerogel showed outstanding flexibility and flame retardancy, and it could bend and recover at low temperatures (−196 °C). As a result, the good gas-sensitive properties and stable mechanical properties enable the ANF/MXene aerogel to be suitable for flexible wearable sensor devices toward different environmental conditions in the future.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Decheng Lu,Xiaoqian Zhou,Lixing Lin,Xinying Zhang,Yingying Chen,Lingyan Feng
Ti 3 C 2 MXene quantum dots (MQDs) have recently gained considerable attention as promising emerging nanomaterials for biosensing applications. However, it is still in the infancy of research on the functionalisation of MQDs to improve their properties. This work synthesised glutathione (GSH)-modified MQDs by hydrothermal method and functionalised them with porphyrin (TMPyP 4 ), resulting in porphyrin-functionalised GSH-Ti 3 C 2 MXene quantum dots (MQDs-TMPyP 4 ) nanocomposite with enhanced electrochemiluminescence (ECL) properties. The lack of selectivity of MQDs and the weak luminescence intensity of ECL have been solved, expanding the method for developing materials with enhanced ECL properties. Cu 2+ was found to quench the ECL luminescence of MQDs-TMPyP 4 , which is valuable for detecting copper ions. Consequently, we constructed a sensitive “Signal on–off” biosensor for Cu 2+ detection. The biosensor demonstrated a sensitive response to copper ions within the concentration range of 10 nM to 10 μM, with an impressively low detection limit of 3.22 nM. Additionally, the biosensor exhibited good stability and selectivity. The ECL biosensor performed well and provided an efficient and ultra-sensitive method for detecting Cu 2+ .
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