JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
·
IF 11.2
Jun Peng,Fangqing Ge,Weiyi Han,Tao Wu,Jinglei Tang,Yuning Li,Chaoxia Wang
Wearable thermoelectric devices hold significant promise in the realm of self-powered wearable electronics, offering applications in energy harvesting, movement tracking, and health monitoring. Nevertheless, developing thermoelectric devices with exceptional flexibility, enduring thermoelectric stability, multifunctional sensing, and comfortable wear remains a challenge. In this work, a stretchable MXene-based thermoelectric fabric is designed to accurately discern temperature and strain stimuli. This is achieved by constructing an adhesive polydopamine (PDA) layer on the nylon fabric surface, which facilitates the subsequent MXene attachment through hydrogen bonding. This fusion results in MXene-based thermoelectric fabric that excels in both temperature sensing and strain sensing. The resultant MXene-based thermoelectric fabric exhibits outstanding temperature detection capability and cyclic stability, while also delivering excellent sensitivity, rapid responsiveness (60 ms), and remarkable durability in strain sensing (3200 cycles). Moreover, when affixed to a mask, this MXene-based thermoelectric fabric utilizes the temperature difference between the body and the environment to harness body heat, converting it into electrical energy and accurately discerning the body's respiratory rate. In addition, the MXene-based thermoelectric fabric can monitor the state of the body's joint through its own deformation. Furthermore, it possesses the capability to convert solar energy into heat. These findings indicate that MXene-based thermoelectric fabric holds great promise for applications in power generation, motion tracking, and health monitoring.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xinyu Wang,Wenbin Wang,Meng Gao,Hao Yu,Min Fu,Wei Chen
A molecularly imprinted electrochemical sensor was designed for the quantitative and efficient detection of melatonin (MT) based on a CuxO/MXene modified screen-printed carbon electrode (MIP/CuxO/MXene/SPCE). Herein, the CuxO/MXene nanocomposite was prepared via a hydrothermal method. The CuxO was uniformly dispersed on the surface and the interlayers of the MXene, forming hybrid heterostructures. The encapsulated CuxO increased the interlayer distance of the MXene matrix to bring more active sites and accelerated the oxidation reaction of melatonin molecules, and thereby the electrochemical response of the sensor was improved. The MIP was constructed by electropolymerization of o-phenylenediamine (o-PD) in the presence of MT on the surface of the CuxO/MXene/SPCE. The morphology and chemical composition of the hybrid film were characterized by scanning electron microscopy and X-ray photoelectron spectroscopy; the electrochemical behaviors of the sensor were evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimal conditions, the MIP/CuxO/MXene/SPCE sensor had a wide linear detection range of 5–700 μM and a low detection limit of 0.029 μM (S/N = 3) for MT. The sensor also showed excellent selectivity, reproducibility, and stability. Finally, it was successfully applied for MT detection in human urine with satisfactory recovery. Overall, this study provided a sensitive and efficient strategy for the determination of MT.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yousen Wu,Ying Wang,Guozhe Sui,Dongxuan Guo,Dawei Chu,Guang Xu,Jinlong Li,Yue Li,Dong-Feng Chai
Nowadays, the inherent re-stacking nature and weak d-p hybridization orbital interactions within MXene remains significant challenges in the field of electrocatalytic water splitting, leading to unsatisfactory electrocatalytic activity and cycling stability. Herein, this work aims to address these challenges and improve electrocatalytic performance by utilizing cobalt nanoparticles intercalation coupled with enhanced π-donation effect. Specifically, cobalt nanoparticles are integrated into V 2 C MXene nanosheets to mitigate the re-stacking issue. Meanwhile, a notable charge redistribution from cobalt to vanadium elevates orbital levels, reduces π*-antibonding orbital occupancy and alleviates Jahn-Teller distortion. Doping with tellurium induces localized electric field rearrangement resulting from the changes in electron cloud density. As a result, Co-V 2 C MXene-Te acquires desirable activity for hydrogen evolution reaction and oxygen evolution reaction with the overpotential of 80.8 mV and 287.7 mV, respectively, at the current density of −10 mA cm −2 and 10 mA cm −2 . The overall water splitting device achieves an impressive low cell voltage requirement of 1.51 V to obtain 10 mA cm −2 . Overall, this work could offer a promising solution when facing the re-stacking issue and weak d-p hybridization orbital interactions of MXene, furnishing a high-performance electrocatalyst with favorable electrocatalytic activity and cycling stability.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Bin Liu,Haonan Chen,Changrong Zhao,Heng Liang
As a 2D nanomaterial with high hydrophilic and co-catalytic properties, MXene has been widely studied in the field of membrane separation and advanced oxidation. However, its susceptibility to oxidation in catalytic environments poses a significant challenge to its long-term stability and performance. Therefore, constructing an oxidation-resistant MXene catalytic membrane technology and ensuring its excellent flux and catalytic performance are important for the practical application of MXene membranes. Herein, we prepared a cobalt monoatomic intercalated M/E0.1-Co catalytic separation membrane by mild reduction of epigallocatechin-3-gallate (EGCG). EGCG not only connects the MXene lamellae during filtration through strong hydrogen bonding, but also protects the chemical stability of the MXene substrate through its antioxidant ability. Furthermore, the trace amount of EGCG in the confined domain space also promotes the rate-limiting step of the transition from the high-valent state to the low-valent state in Co single-atom catalysis. The stability of the catalytic separation layer was ensured along with a 100% degradation performance of sulfamethoxazole. This study establishes a bridge between the catalytic oxidation and chemical stability of a wide range of MXene-based materials nowadays and provides a viable proposal for the practical application of long-term utilized MXene materials in catalysis.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dandan Huang,Hairong Li,Weining Liu,Xi Tan,Mingyang Zhao,Guohan Liu
Acetone, one of the most used solvents in industry and the laboratory, can anesthetize the central nervous system of humans and cause damage to the kidneys, pancreas, and liver. For the purpose of monitoring the leakage and concentration of acetone, α-/γ-Fe 2 O 3 /TiO 2 -X (α-/γ-Fe 2 O 3 -X) materials were successfully manufactured by in-situ solvothermal and calcination processes. Here, MIL-100-derived porous α-/γ-Fe 2 O 3 and TiO 2 nanoparticles are uniformly grown on the self-sacrificial template of exfoliated Ti 3 C 2 T x nanosheets (ex-Ti 3 C 2 T x ) that simultaneously serve as the Ti source. The heterostructure between TiO 2 and Fe 2 O 3 therein is conducive to carrier transfer and sharp resistance change. And bulk resistance-controlled γ-Fe 2 O 3 is able to raise the response to gas. Besides, the porous structure of α-/γ-Fe 2 O 3 -X could create plenty of oxygen vacancies and surface functional groups, which facilitate diffusion and contact interaction between acetone and active sites. Accordingly, the α-/γ-Fe 2 O 3 -X endow exceptional response (R = 105.5) towards 100 ppm acetone at 240 ℃, fast response/recovery time, outstanding selectivity and stability. To further substantiate this promotion mechanism, density functional theory (DFT) calculations were carried out for investigating the adsorption behavior of α-/γ-Fe 2 O 3 -X for acetone.
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TOPICS IN CATALYSIS
·
2024
·
IF 2.8
Mi Xionghui,Wang Pingxia,Rokni Hassan
A new ZnO/MXene material was made using a simple hydrothermal method and heat treatment for measuring glucose without enzymes in sports drinks and human blood samples. The best ZnO/MXene-300 material, made at 150 °C and heated at 300 °C, had a large surface area of 152 m2/g, high current density of 1.12 mA/cm2, and low activation energy of 32.6 kJ/mol for glucose oxidation. The sensor could measure a wide range of glucose levels (0.01-12 mM) with a low detection limit (0.005 µM), worked well in the presence of other substances, remained stable (93.6% after 7 days), and gave consistent results (RSD of 3.2%). The material was tested by measuring glucose in sports drinks and blood samples, with measured values close to the actual values (96.4–104.5%) and high precision (RSDs of 2.8% and 3.8%). These results show that ZnO/MXene materials are promising for making sensitive and stable glucose sensors that don’t need enzymes.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Yuhuan Xu,Meng Pei,Xiao Zhan,Jingyu Du,Daohai Zhang
MXene-based materials that effectively deal with harmful electromagnetic waves are attracting more and more attention. In this paper, MXene hydrogels with good properties were prepared using polyvinyl alcohol (PVA) and polyacrylic acid (PAA) to construct a three-dimensional framework for hydrogels, and then adding homemade MXene materials to take advantage of their excellent properties, which resulted in the formation of an electrically conductive framework. The study shows that MXene-10 has a tensile strength of 0.29 MPa and an electrical conductivity of 156.24 S/mm. In addition, electromagnetic shielding (EMI) of 33.6 dB can be achieved when the MXene hydrogel is only 2 mm.
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高影响因子
Nano Today
·
2024
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IF 13.2
Yuan Yu,Menggang Li,Miao Sun,Zhaolin Yang,Yifan Liu,Senwei Hu,Jiazuo Zhou,Yudong Li,Haiyue Yang,Chengyu Wang
The exceptional potential of MXene aerogels for practical applications is impeded by the energy-intensive processing and insufficient mechanical stability. Inspired by natural bones, herein, we report the MXene@regenerated nanocellulose aerogel (MRCA) with strong mechanical performance via dual aerogel fabrication to achieve high-performance energy generation and storage. The MRCA achieves a gravimetric capacitance of 1271.16 F g −1 at 2 mA cm −2 , and the energy density of the eco-friendly symmetrical MRCA-based solid-state supercapacitor reaches 0.11 mWh cm −2 , positioning it as a top contender among most state-of-the-art MXene-based electrodes. Additionally, the MRCA exhibits a robust specific tensile strength of 68.35 MPa cm 3 g −1 , resembling bone-like resilience. Therefore, MRCA can swiftly generate an open-circuit voltage of 181.24 V. The instant high voltage of MRCA transforms into diverse signals, driving MRCA-SC to release energy for electric devices in practical scenarios, paving the way for future sustainable power systems.
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ChemistrySelect
·
2024
·Vol. 9
·期 18
·e202305086
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IF 1.9
XuKun Qian,ZeFeng Zhao,RuiHua Zhang,ChangBai Yu
Graphical The adsorption capacity of Pb(II) ion for accordion-like Ti 3 CN Mxene is significantly increased after alkalization treatment. The maximum adsorption capacity of the alkalized Ti 3 CN MXene is up to 87.4 mg ⋅ g −1 , and the adsorption ratio reaches 96.6 %. The adsorption process is mainly controlled by chemical adsorption and belongs to surface monolayer adsorption. The presence of poisonous Pb(II) ions in water resources has raised global health concerns. Herein, the adsorption performance of accordion-like Ti 3 CN MXene for Pb(II) ions was investigated for the first time. Batch experiments were carried out by varying modifications, pH values, initial Pb(II) concentrations, adsorption time and temperatures. The results prove that the alkalized-Ti 3 CN shows enhanced adsorption performance. Although the temperature effect is insignificant, the Pb(II) adsorption is strongly pH-dependent. The maximum Pb(II) adsorption capacity of alkalized −Ti 3 CN is about 2.5 times higher than that of activated carbon. The adsorption ratio of Pb(II) is up to 96.6 %. The adsorption capacity increases with increasing the initial concentration of Pb(II). The alkalized-Ti 3 CN adsorbs Pb(II) very quickly and the adsorption equilibrium is nearly achieved within 70 minutes. The adsorption follows the quasi-second-order kinetic model as well as the Langmuir model, and is mainly controlled by chemical adsorption. It is preliminarily concluded that Pb(II) replaces Na(I) of the −ONa functional groups on the alkalized-Ti 3 CN surfaces. This study proves the alkalized-Ti 3 CN MXene has potential application for the purification treatment of wastewater contaminated with Pb(II) ions.
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Materials
·
2024
·Vol. 17
·期 18
·4499
·
IF 3.1
Siyu Wang,Dawei Xia,Xinyu Xu,Haoyang Song,Yongquan Qing
Superhydrophobic strain sensors are highly promising for human motion and health monitoring in wet environments. However, the introduction of superhydrophobicity inevitably alters the mechanical and conductive properties of these sensors, affecting sensing performance and limiting behavior monitoring. Here, we developed an alkylated MXene–carbon nanotube/microfiber composite material (AMNCM) that is simultaneously flexible, superhydrophobic, and senses properties. Comprising a commercially available fabric substrate that is coated with a functional network of alkylated MXene/multi-walled carbon nanotubes and epoxy–silicone oligomers, the AMNCM offers high mechanical and chemical robustness, maintaining high conductivity and strain sensing properties. Furthermore, the AMNCM strain sensor achieves a gauge factor of up to 51.68 within a strain range of 80–100%, and exhibits rapid response times (125 ms) and long-term stability under cyclic stretching, while also displaying superior direct/indirect anti-fouling capabilities. These properties position the AMNCM as a promising candidate for next-generation wearable devices designed for advanced environmental interactions and human activity monitoring.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Mengying Du,Guoqing Zu,Chuanyu Sun,Fan Ye,Xijia Yang
With the trend towards slimmer and smaller wearable smart electronic devices, there is a growing need for lightweight, flexible, and eco-friendly power sources. Herein, we report a wearable, self-charging energy storage device based on triboelectric nanogenerator (TENG) for energy-harvesting and zinc-ion hybrid capacitor for energy-storage. The all-fiber-structured TENG is constructed by using ethyl cellulose/polyvinylpyrrolidone (EC/PVP) as the positive friction layer and MXene-doped polyvinylidene fluoride (PVDF) with strong electronegativity as the negative friction layer via electrostatic spinning. Particularly, the TENG possesses achieving a peak power density of 830 mW m −2 at a load resistance of 10 8 Ω. In addition, MnO 2 /carbon cloth (CC) cathode, activated carbon anode and ZnCl 2 @MnSO 4 /PVA electrolyte were assembled for a zinc-ion hybrid capacitor (MA-SC), which exhibits excellent electrochemical performance, with a specific capacitance of 493.79 mF cm −2 at 2 mA cm −2 . The MA-SC demonstrates high energy density of 341.8 μWh cm −2 at power density of 5.56 mW cm −2 , which is very suitable as an energy storage device. The MA-SC and TENG can be assembled to the power textile that integrates into garments, enabling the harvest and storage of mechanical energy generated by the human body. Therefore, this integrated self-charging power textile holds great promising applications in wearable electronics.
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Metals
·
2024
·Vol. 14
·期 8
·922
·
IF 2.6
Wei Guo,Buxiang Wang,Qing Shu
Hydrogen (H2) is considered to be the best carbon-free energy carrier that can replace fossil fuels because of its high energy density and the advantages of not producing greenhouse gases and air pollutants. As a green and sustainable method for hydrogen production, the electrochemical hydrogen evolution reaction (HER) has received widespread attention. Currently, it is a great challenge to prepare economically stable electrocatalysts for the HER using non-precious metals. In this study, a Co/Co3O4/Ti3C2Txcatalyst was synthesized by supporting Co/Co3O4with Ti3C2Tx. The results show that Co/Co3O4/Ti3C2Txhas excellent HER activity and durability in 1 mol L−1KOH, and the overpotential and Tafel slope at 10 mA·cm−2were 87 mV and 61.90 mV dec−1, respectively. The excellent HER activity and stability of Co/Co3O4/Ti3C2Txcan be explained as follows: Ti3C2Txprovides a stable skeleton and a large number of attachment sites for Co/Co3O4, thus exposing more active sites; the unique two-dimensional structure of Ti3C2Txprovides an efficient conductive network for rapid electron transfer between the electrolyte and the catalyst during electrocatalysis; Co3O4makes the Co/Co3O4/Ti3C2Txcatalyst more hydrophilic, which can accelerate the release rate of bubbles; Co/Co3O4can accelerate the adsorption and deionization of H2O to synthesize H2. This study provides a new approach for the design and preparation of low-cost and high-performance HER catalysts.
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