CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yuhui Feng,Mingye Zhu,Wenjun He,Yan Bai,Ning Ding,Zhen You,Xiang Zou,Weiwei Zhao,Shujuan Liu,Qiang Zhao
The conductive polymer composites (CPC) with elevated levels of conductivity typically exhibit enhanced electromagnetic interference shielding effectiveness (EMI SE), however, this enhancement is often paralleled by an augmented risk of secondary electromagnetic (EM) pollution, attributable to the increased EM reflection. Developing a facile method to construct an eco-friendly CPC for EMI shielding that simultaneously exhibits low reflection and high shielding performance remains a promising yet challenging pursuit. Moreover, excellent shielding materials should possess exceptional thermal management capabilities to protect individuals or equipment under extreme conditions. Herein, we have engineered the MXene/polyurethane (MXene/PU) sponge (MPS) modules characterized by the hierarchical porous structure. Through the strategic modular combination of impedance-matching and impedance-mismatching modules tailored for different application contexts, the customizable gradient MXene/PU sponge (GMPS) facilitates achieving a balance of exceptional average EMI SE (44.6 dB), a low reflection coefficient (R = 0.18), and superior photo/electrothermal conversion capability. Furthermore, both experimental results and finite element analyses are adopted to explore the effect of the arrangement order of GMPS on EMI shielding performance. Leveraging the green, health-conscious, and flexibly customizable approach, it manifests tremendous potential across various areas, including intelligent residences and multifunctional integrated systems.
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Surfaces and Interfaces
·
2024
·
IF 5.7
YueChao Zhao,Fei Fang
Flexible biomimetic photonic structures, capable of achieving dynamic radiation modulation in both solar and infrared (IR) bands as required, are increasingly catering to low-energy thermal management and sustainable development. Herein, the cephalopod-inspired composite film of styrene-ethylene-butene-styrene block copolymer (SEBS)/titanium dioxide (TiO 2 )-Mxene has been designed and prepared. Analogous to squid leucophores, the SEBS/TiO 2 layer of is able to regulate solar reflection and transmit infrared radiation. Mimicking squid iridocytes, the Mxene layer can regulate infrared reflection and absorb sunlight. The optimal structural parameters of the film and the regulation contrast were estimated via theoretical analysis. The theoretical design also illustrates that the two layers collaborate without interference. According to the optimal parameters, the Mxene-SEBS/TiO 2 film was prepared. A dynamic regulation between radiative heating and cooling, namely, the solar reflection between 38 % and 66 % and infrared emissivity between 68 % and 89 % can be realized via mechanical actuation under 200 % strain. As the solar radiation is ∼650 W/m 2 , the composite film achieves ∼6.2 °C heating/∼1.4 °C cooling of the skin under mechanical actuation. When reducing the natural convection loss, the film further achieves ∼11.6 °C heating/∼0.8 °C cooling of the skin. This work provides a novel system and strategy for radiation modulation in solar-infrared bands for possible applications in thermal management.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
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IF 19
Siqing Yan,Qian Ma,Cuilian Wen,Lijin Luo,Junhao Jin,Xiong Li,Yuanxing Fang,Baisheng Sa
Mesoporous bioactive glasses (MBGs) are gaining recognition in bone tissue engineering for their osteoblast differentiation-inducing properties and customizable structures. However, the challenge of peri-implantitis has hindered their broader application. To address this, double transition metal TiNbCT x MXene acted as near-infrared (NIR) photothermal agent, has been integrated with MBG nanospheres to develop novel multifunctional TiNbCT x /MBG (TNC/MBG) nanocomposites in this work. The results demonstrate that the TNC/MBG composites feature uniform mesoporous spherical MBG nanoparticles on TiNbCT x nanosheets, boasting a significantly enhanced specific surface area of up to 444.74 m 2 g −1 and a more negative zeta potential than pristine MBG. Importantly, the TNC/MBG nanocomposites can effectively promote apatite formation, as well as the proliferation and viability of MC3T3-E1 cells. Moreover, it is highlighted that the TNC/MBG nanocomposites display remarkable photothermal conversion efficiency and stability, leading to over 95% antibacterial inhibition rates against both S. aureus and E. coli under NIR irradiation. These findings offer an appealing strategy to develop multifunctional TNC/MBG nanocomposites with enhanced biological activity and robust antibacterial properties, which shows great potential for various biomedical applications.
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Journal of the Mechanical Behavior of Biomedical Materials
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2024
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IF 3.3
Kefan Yang,Siqi Lei,Xiaoli Qin,Xiaoxue Mai,Weibo Xie,Shengrong Yang,Jinqing Wang
MXene, as a new category of two-dimensional nanomaterials, exhibits a promising prospect in biomedical applications due to its ultrathin structure and morphology, as well as a range of remarkable properties such as biological, chemical, electronic, and optical properties. In this work, different concentrations of MXene (M) were added to polyvinyl alcohol (PVA, P)/nano-hydroxyapatite (n-HA, H) mixed solution, and series of PVA/n-HA/MXene (PHM) composite membranes were obtained by combining sol-gel and freeze-drying processes. Morphology, chemical composition, surface, and mechanical properties of the prepared PHM membranes were characterized by various techniques. Subsequently, the swelling and degradation performances of the composite membranes were tested by swelling and degradation tests. In addition, in vitro studies like cell adhesion, cytotoxicity, proliferation, osteogenic differentiation, and antibacterial properties of MC3T3-E1 were also evaluated. The results showed that the addition of MXene could apparently improve the composite membranes’ physicochemical properties, bioactivity, and osteogenic differentiation. Specially, PHM membrane had the best comprehensive properties when the concentration of MXene was set as 2.0% w/v. In a word, the addition of MXene has a positive effect on improving the mechanical properties, osteogenic induction, and antibacterial properties of PH composite membranes, and the prepared PHM composite membranes possess potential applications for guided bone regeneration.
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CHEMOSPHERE
·
2024
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IF 8.1
Samaneh Rashtbari,Gholamreza Dehghan,Alireza Khataee,Simin Khataee,Yasin Orooji
Various commercial and industrial products widely use highly toxic eight-carbon-chain perfluorooctanesulfonate (PFOS), posing a significant threat to the health of living organisms. In this study, the electrochemical detection of PFOS was achieved by developing a carbon paste electrode (CPE) using the Mo 2 Ti 2 AlC 3 MAX phase. Mo 2 Ti 2 AlC 3 was synthesized and directly used to construct the CPE. The electrochemical performance of the prepared sensor was tested using various electrochemical techniques, such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), differential pulse voltammetry (DPV), and amperometric titration. The developed electrochemical sensor exhibited two linear ranges from 0.001 to 0.09 μM and from 1.1 to 62.6 μM, with a detection limit of 0.04 nM. The sensor demonstrated high sensitivity, measuring 145.1 μA μM −1 cm −2 , and a response time of 5 s for PFOS quantification at a working potential of 0.3 V. Additionally, the sensor demonstrated outstanding resistance to typical interfering chemicals. The applicability and reliability of the developed sensor for PFOS determination were further tested in real samples, yielding recoveries in the range of 92.6–108.2%, with relative standard deviation (RSD) values between 1.8% and 3.7%. The Mo 2 Ti 2 AlC 3 MAX phase-based electrochemical sensor is simple, rapid, sensitive, and cost-effective, making it a promising approach for the quantification of PFOS in environmental water and soil samples.
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SENSORS
·
2024
·Vol. 24
·期 24
·7878
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IF 3.4
Xiaoyu Su,Junbiao Chen,Shanshan Wu,Yong Qiu,Yuxiang Pan
As a crucial biomarker for the early warning and prognosis of liver cancer diseases, elevated levels of alpha-fetoprotein (AFP) are associated with hepatocellular carcinoma and germ cell tumors. Herein, we present a novel signal-on electrochemical aptamer sensor, utilizing AuNPs–MXene composite materials, for sensitive AFP quantitation. The AuNPs–MXene composite was synthesized through a simple one-step method and modified on portable microelectrodes. As signal molecules, AFP aptamers were conjugated with methylene blue (MB) and immobilized on the electrode surface. When interacting with AFP, conformational changes in the aptamer–target complex caused MB to approach the electrode, and the electrochemical signal was enhanced through signal-on mechanisms. The developed sensor demonstrated high sensitivity and selectivity for AFP, with a log-linear relationship defined as 1–300 ng/mL, and the LOD was 0.05 ng/mL (S/N = 3). The method was applied to laboratorial and real clinical samples and presented satisfactory selectivity, reproducibility, and long-term stability. The proposed high-performance sensor highlights the potential of electrochemical aptamer sensors in improving the warning capabilities in disease management.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
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IF 6.3
Liheng Zhu,Boyang Zou,Naici Bing,Huaqing Xie,Wei Yu
The issues of inherent low thermal conductivity , slow heat transport rate and easy leakage are critical challenges for accelerating solar-thermal energy harvesting and storage for organic solid-liquid phase change materials (PCMs). Aerogel carriers with thermal conductivity enhancement based on ice temple methods show favorable potential for PCMs solar thermal applications. Comparing with disordered and unidirectional freezing, bidirectional freezing can assemble efficiently in multiple dimensions and result in long-range ordered structures. In this paper, bacterial cellulose/polyvinyl alcohol/MXene aerogels were constructed by bidirectional freezing. The anisotropic PCMs composites were from vacuum impregnation PEG into aerogel networks. By controlling crystallization and growth of ice crystals through the dual temperature gradients , the PCMs composites obtained enhanced heat transfer efficiency in horizontal and vertical directions. Bidirectional aligned PCMs with PDMS wedge angle of 0° and 20° exhibit high thermal conductivity of 0.716 W m −1 K −1 and 0.768 W m −1 K −1 , which were 184% higher than that of PEG , and photothermal conversion efficiency of 55.17% and 76.91%. Remarkably, the PCMs composites with a 20° PDMS wedge angle also exhibited a high PCM loading capacity (96.3%) and a high enthalpy (157.7 J/g). The results show that bidirectional anisotropic PCMs composites have excellent overall performance and are expected to improve solar thermal application.
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Chemistry-An Asian Journal
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2025
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IF 3.3
Xiaoqian Zhou,Haicheng Song,Xinying Zhang,Lifei Chen,Yingying Chen,Zhenzhen Li,Lingyan Feng
MXene, a two-dimensional nanomaterial, has metal conductivity, high electronegativity, functionalized with surface groups, which make it widely applicable in catalysis and biosensing. However, studies on the principle of enhanced electrochemiluminescence (ECL) by MXene composites and the improvement of their performance in catalyzing the ECL reaction are still in their infancy. In this study, gold nanoparticles (AuNPs) are obtained by mild reductive reduction and loaded in situ on the Ti 3 C 2 T x MXene surface to form the composites (AuNPs@MXene). In oxygenated PBS test buffer, AuNPs@MXene enhance the ECL emission of silver nanoclusters (AgNCs) with aggregation-induced electrochemiluminescence (AIECL) properties as luminophore. Approximately 7.5-fold enhancement of ECL signals is obtained by using two ECL enhancement strategies: an efficient AIECL emitter and a co-reaction accelerator. The special nucleic acid structure with “Three Way Junction (TWJ)” enables an ultra-sensitive detection of microRNA, providing an efficient and ultra-sensitive method for microRNA detection. The biosensor achieves a wide detection range of microRNA-21 from 100 aM to 1 nM, with a low detection limit of 31 aM, and exhibits excellent stability, selectivity and high reproducibility in real samples.
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BIOMATERIALS
·
2024
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IF 12.8
Huan Wang,Xinchen Liu,Xiangyu Yan,Yong Du,Fang Pu,Jinsong Ren,Xiaogang Qu
Anticancer nanomedicines used for ferroptosis therapy generally rely on the direct delivery of Fenton catalysts to drive lipid peroxidation in cancer cells. However, the therapeutic efficacy is limited by the ferroptosis resistance caused by the intracellular anti-ferroptotic signals. Herein, we report the intrinsic ATPase-mimicking activity of a vanadium carbide MXene nanozyme (PVCMs) to pharmacologically modulate the nuclear factor erythroid 2-related factor 2 (Nrf2) program, which is the master anti-ferroptotic mediator in the ironclad defense system in triple-negative breast cancer (TNBC) cells. The PVCMs perform high ATPase-like activity that can effectively and selectively catalyze the dephosphorylation of ATP to generate ADP. Through a cascade mechanism initiated by falling energy status, PVCMs can powerfully hinder the Nrf2 program to selectively drive ferroptosis in TNBC cells in response to PVCMs-induced glutathione depletion. This study provides a paradigm for the use of pharmacologically active nanozymes to moderate specific cellular signals and elicit desirable pharmacological activities for therapeutic applications.
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Advanced Healthcare Materials
·
2024
·
IF 10
Zhilong Wang,Yan Zheng,Liang Qiao,Yuanya Ma,Huajing Zeng,Jiachen Liang,Qian Ye,Kuangyu Shen,Bin Liu,Luyi Sun,Zengjie Fan
Repairing larger defects (> 5 mm) in peripheral nerve injuries (PNIs) remains a significant challenge when using traditional artificial nerve guidance conduits (NGCs). We propose a novel approach that combines 4D printing technology with poly(L-lactide-co-trimethylene carbonate) (PLATMC) and Ti 3 C 2 T x MXene nanosheets, thereby imparting shape memory properties to the NGCs. Upon body temperature activation, the printed sheet-like structure can quickly self-roll into a conduit-like structure, enabling optimal wrapping around nerve stumps. This design enhances nerve fixation and simplifies surgical procedures. Moreover, the integration of microchannel expertly crafted through 4D printing, along with the incorporation of MXene nanosheets, introduces electrical conductivity. This feature facilitates the guided and directional migration of nerve cells, rapidly accelerating the healing of the PNI. By leveraging these advanced technologies, the developed NGCs demonstrate remarkable potential in promoting peripheral nerve regeneration, leading to substantial improvements in muscle morphology and restored sciatic nerve function, comparable to outcomes achieved through autogenous nerve transplantation. This article is protected by copyright. All rights reserved
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Surfaces and Interfaces
·
2025
·
IF 6.3
Zebin Zheng,Xu Yang,Lin Lv,Zhaoqing Xia,Yukai He,Xunying Wang,Wenjing Dong,Hanbin Wang,Guokun Ma,Houzhao Wan,Hao Wang
Application of two-dimensional MXenes (Ti 3 C 2 T x )-based memristors in neuromorphic computing is restricted due to the unsatisfied power consumption, consistency and tolerance, and the indistinct resistive switching mechanism. Herein, an elaborately designed Al/Ti 3 C 2 T x /SnO 2 /ITO memristor to alleviate the above issues, and the device exhibits a boosted switching ratio of about 10 3 , excellent durability over 500 cycles, and a switching voltage of <0.6 V, and shows good retention characteristics. Theoretical analysis manifests that the insertion of the SnO 2 layer promotes the formation and rupture of conductive filaments as the optimized local electric field and the concentration gradient of oxyanions tremendously favors oriented ionic migration and reduces the transition voltage. This work not only provides a feasible and effective way to enhance the memristive performance of two-dimensional materials but also further demonstrates the advantages of two-dimensional materials in neural network computing architectures.
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JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Xu Yin,Jiatian Yu,Zhifeng Gao,Wei Li,Kajia Wei,Yun Jiang,Yonghao Zhang,Haoming Chen,Weiqing Han
Bromate (BrO 3 – ) is a common by-product of advanced oxidation water treatment processes. In this study, a catalyst combining MXene and Pd was synthesized to eliminate BrO 3 – by electrochemical reduction in flow-through mode. The fabricated Ti/Pd@MXene filter showed superior activity for BrO 3 – reduction compared with Ti/MXene filter. A satisfactory BrO 3 − removal performance by Ti/Pd@MXene filter was obtained at pH values of 5–7 with a current density of 1.0–2.5 mA·cm –2 . The mechanism explored by quenching experiments and EPR analysis demonstrated that atomic hydrogen (H*)-mediated reduction was dominant in the Ti/Pd@MXene filter system and contributed to 84.2 % of the BrO 3 − removal, which was greater than that of Ti (7.1 %) and Ti/MXene (43.9 %). DFT calculations revealed the introduction of Pd nanoparticles on MXene lowered the energy barrier for generating H* from OH* -H* , thus boosting H* formation. Furthermore, the Ti/Pd@MXene filter had favorable stability and applicability, and nearly 90 % of BrO 3 − could be eliminated in different water matrices. Moreover, energy consumption of the Ti/Pd@MXene filter was more competitive than that previously reported (0.348 kWh·mmol −1 ), especially for high BrO 3 − removal (≥75 %). This work highlighted an effective flow-through electrocatalytic filter to induce H* -mediated electrochemical reduction of BrO 3 − .
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