JOURNAL OF HAZARDOUS MATERIALS
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2024
·
IF 12.2
Siyi Wang,Pengcheng Zhang,Enzhao Ma,Suwen Chen,Zijie Li,Liyong Yuan,Jianhua Zu,Lin Wang,Weiqun Shi
The removal and recovery of radioactive Sr(II) from wastewater and seawater has been of great concern due to the negative environmental impacts of nuclear energy development and the potential risk of nuclear accidents. Herein, a facile molten salt synthesis strategy was developed to systematically investigated the reaction of different types of MXenes with nitrates. Among the products, K + intercalated hierarchical titanate nanostructures (K-HTNs) obtained from the direct chemical transformation of multilayered Ti 3 C 2 T x exhibited unique layered structures, good physicochemical properties, and outstanding adsorption performance for Sr(II). The maximum adsorption capacity of Sr(II) by K-HTNs reached 204 mg·g −1 at ambient temperature, and the good regeneration and reusability of the titanate was also demonstrated. K-HTNs showed preferential selectivity for Sr(II) in different environmental media containing competing ions, and the removal efficiency of Sr(II) in real seawater was as high as 93.3 %. The removal mechanism was elaborated to be the exchange of Sr 2+ with K + /H + in the interlayers of K-HTNs, and the adsorbed Sr(II) had a strong interaction with Ti−O − termination on the titanate surface. Benefiting from the merits of rapid and scalable synthesis and excellent adsorption performance, MXene-derived K-HTNs have broad application prospects for the purification of 90 Sr-contaminated wastewater and seawater.
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Small
·
2024
·Vol. 20
·期 35
·2401622
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IF 13
Jian Zou,Xin Jing,Shitao Li,Peiyong Feng,Yi Chen,Yuejun Liu
Single-network hydrogels are often too fragile to withstand mechanical loading, whereas double-network hydrogels typically exhibit significant hysteresis during cyclic stretching-releasing process due to the presence of a sacrificial network. Consequently, it is a considerable challenge for designing hydrogels that are both low in hysteresis and high in toughness for applications requiring dynamic mechanical loads. Herein, the study introduced a novel “sliding tangle island” strategy for creating tough and low-hysteresis hydrogels, which are prepared through in situ polymerization of highly concentrated acrylamides (AM) to form numerous entanglements within the MXene spacing without any chemical crosslinker. The MXene entangled with long polyacrylamide (PAM) chains to form tangle island that served as a relay station to transmit stress to neighboring molecular chains. This mechanism helps alleviate stress concentration and enhances energy dissipation efficiency, thereby reducing mechanical hysteresis. The resulting hydrogel exhibited exceptional properties, including high stretchability (≈900%), low hysteresis (less than 7%), high toughness (1.34 MJ m −3 ), and excellent sensing performance to rival the commercial hydrogel electrode. Therefore, this work sheds light on feasible design of energy dissipation structure to reduce the hysteresis of the composite hydrogels.
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Progress in Natural Science-Materials International
·
2024
·
IF 4.8
Qinli Ye,Jinhui Lin,Guoxiang Wang,Shuwen Zeng,Tao Jiang,Xiang Gao,Muhammad Danang Birowosuto,Wei Xiong,Chenjie Gu
Infrared thermography technology is a noninvasiveness and real-time imaging method, it has attracted enormous attentions for blood flow imaging. However, the implementation of infrared thermography technology is still limited by the poor imaging quality caused by the low temperature discrimination between the target blood vessel and background. Herein, we reported a flexible and low-cost MXene based photothermal microheater for enhancing the infrared imaging of blood flow. In the experiment, MXene films with specific thickness was prepared by vacuum filtering different concentrations of MXene colloidal solutions. Thereafter, the microheaters were fabricated by assembling the MXene films on the PU tape/PDMS substrate, and then sealed with another layer of pure PDMS film on the top of MXene film. The photothermal performance of the microheaters were evaluated by using an 808-nm laser as the exciting source. Experimental results show that the optimal microheater (MXene content: 17.5 mg) can reach a safe temperature of 41.5 °C with 43.9 s under the light irradiation of 100 mW·cm −2 . Moreover, it can be stabilized at the equilibrium temperate for over 25 min. Finally, the above optimal microheater was used to accurately heat the simulated blood vessel. It shows that temperature difference of 3.3 °C can be induced between the heated blood vessel and environment. As a result, it significantly enhances the quality of the infrared imaging of the blood flow in the simulated vascular network.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiaotong Mu,Lihua Chen,Nannan Qu,Min Yin,Shang Wu,Qimeige Hasi,Chaohu Xiao
Solar-powered interface evaporation is considered a promising technology to obtain freshwater from non-potable water by using sustainable solar energy. However, research on combining the photocatalytic effect with solar interfacial evaporation technology to go for photothermal conversion materials with full solar spectrum utilization for photothermal and photodegradation capabilities is still scarce. Due to the unique optical properties of MXene, a novel MXene/Ag 3 PO 4 -based membrane with synergistic photothermal and photocatalytic effects was developed from the perspective of practical applications such as water purification, photodegradation of organic dyes and antibacterial properties. In this paper, polyvinylidene fluoride (PVDF) and carbon black (CB) were used as the substrate, calcium carbonate (CaCO 3 ) and hydrochloric acid (HCl) were selected as the pore-forming agent for hydrophilic modification, and MXene/Ag 3 PO 4 serves as the photocatalyst. The prepared composite polyvinylidene fluoride membrane (PCC-MXene/Ag 3 PO 4 ) with Schottky junction, possesses a rich pore structure, abundant water molecule transport channels, high light absorption ability, and low thermal conductivity, which lead to a good performance in solar interface evaporation, photodegradation and antibacterial. The superhydrophobicity and floatability of the nanosponges in water enable them to continuously pump water, which greatly promotes the dissolution of salt accumulation. With the help of porous nanosponges, PCC-MXene/Ag 3 PO 4 exhibits excellent evaporation stability and salt resistance under 1 kW m −2 solar irradiation, as well as photodegradation of organic dyes. In addition, the PCC-MXene/Ag 3 PO 4 membrane has the properties of self-buoyancy, electrical conductivity, and superior flexibility. Therefore, considering the simple preparation method and fine performances, the PCC-MXene/Ag 3 PO 4 mixed membrane has great application potential in the study of interface evaporation, photodegradation of organic dyes, and antibacterial properties.
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FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 9
·3323-3330
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IF 2.2
You Maoyu,Xin Binjie
The microstructure, wettability, and electrochemical performance of MXene/polyacrylonitrile (PAN)-derived hybrid carbon nanofiber membranes (MCNFs) as high-performance supercapacitor electrode materials are reported. A series of MCNFs were prepared using electrospinning, carbonization, and vacuum-assisted filtration deposition methods. Carbonized PAN-derived carbon nanofiber membranes were used as substrates, and MXene dispersion was deposited onto both sides of the carbon nanofiber membranes (CNFs). Structural analysis showed that MXene nanosheets were uniformly attached to PAN-derived CNFs, with increasing deposition thickness on the surface as the MXene content in the dispersion increased. The addition of MXene nanosheets improved the hydrophilicity of CNFs, thus effectively promoting electrolyte penetration at the electrode/electrolyte interface. Thereby, the specific capacitance of PAN-derived pure CNFs increased from 60.2 Fg −1 to a maximum of 436.5 Fg −1 for the hybrid membrane MCNFs, showing a significant enhancement compared to CNFs alone, making it an efficient energy storage device.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Wang Jiaqi,Liu Yue,Yang Ganceng,Jiao Yanqing,Dong Youming,Tian Chungui,Yan Haijing,Fu Honggang
Anion exchange membrane seawater electrolysis is vital for future large-scale green hydrogen production, however enduring a huge challenge that lacks high-stable oxygen evolution reaction electrocatalysts. Herein, we report a robust OER electrocatalyst for AEMSE by integrating MXene (Ti 3 C 2 ) with NiFe sulfides ((Ni,Fe)S 2 @Ti 3 C 2 ). The strong interaction between (Ni,Fe)S 2 and Ti 3 C 2 induces electron distribution to trigger lattice oxygen mechanism, improving the intrinsic activity, and particularly prohibits the dissolution of Fe species during OER process via the Ti-O-Fe bonding effectively, achieving notable stability. Furthermore, the good retention of sulfates and the abundant groups of Ti 3 C 2 provide effective Cl - resistance. Accordingly, (Ni,Fe)S 2 @Ti 3 C 2 achieves high OER activity (1.598 V@2 A cm -2 ) and long-term durability (1000 h) in seawater system. Furthermore, AEMSE with industrial current density (0.5 A cm -2 ) and durability (500 h) is achieved by (Ni,Fe)S 2 @Ti 3 C 2 anode and Raney Ni cathode with electrolysis efficiency of 70% and energy consumption of 48.4 kWh kg -1 H 2 .
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ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Junming Zhang,Yefeng Feng,Junhao Peng,Kaidan Wu,Zuyong Feng,Miao He,Kunhua Wen,Deping Xiong
MXenes, with their metallic conductivity and complex surface chemistry, are emerging as promising newcomers in the field of energy storage materials. In this work, we present innovative iterations of MXene synthesised by phytic acid selective etching and self-assembly, denoted P-MXene, with phytic acid adhered tightly to the surface and increased the interlayer spacing of the MXene, which was beneficial to the embedment/desorption of K + , and etched more active sites. When used as an anode material for potassium ion batteries, P-MXene exhibits superior specific capacity of 135 mAh*g −1 , long-term cycling stability capacity of 128.8 mAh*g −1 and higher rate performance (the final capacity of 110.0 mAh*g −1 ). This transformative development not only establishes a new paradigm for MXene derivatives, but also paves the way for the exploration of high-performance MXene-based energy storage materials.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Rongbin Li,Yan Sun,Qianyu Zhao,Xin Hao,Haowei Liang,Shengang Xu,Yingliang Liu,Xiaoman Bi,Shaokui Cao
The resistive-switching-based logic gates are the promising electronic components for future digital logic operation in integrated circuits based on resistive random access memories (RRAMs). In particular, the logic gates controlled by near-infrared (NIR) light within the tissue optical window become more attractive in the practical application of in vivo manually controlled biocompatible microchips. In this work, fibrous MXene@MAPbI3-based resistive switching storage devices that are NIR-responsive at 1064 nm are prepared via a simple dip-coating process by introducing monolayer Ti3C2Tx-TBAOH MXene nanosheets with an excellent NIR absorption into the perovskite precursor solution. The 0.05 wt% Ti3C2Tx-TBAOH-modified MAPbI3-based RRAM device achieves the highest ON/OFF ratio of approximately 108, which is two orders of magnitude higher than the pristine device. Ti3C2Tx-TBAOH-modification produces a low SET voltage of +1.34 V under 1064-nm laser illumination compared with +2.22 V in the dark. More interestingly, the 1064-nm laser illumination on the Ti3C2Tx-TBAOH-modified device presents a well-defined NIR-responsive state at 1064 nm in the perovskite RRAM device and finally realizes NIR-controlled logic gates at 1064 nm for in-memory computing, such as “AND”, “OR” and “NOT”. This kind of NIR-responsive fibrous resistive switching logic device has potential application in future e-textiles as fundamental building blocks for integrated data-storing and information-processing function, especially in the in vivo manually controlled biocompatible microchips.
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eScience
·
2024
·
IF 42.9
Yan Gao,Xiao Chen,Xu Jin,Chenjun Zhang,Xi Zhang,Xiaodan Liu,Yinhui Li,Yang Li,Jinjie Lin,Hongyi Gao,Ge Wang
Developing advanced nanocomposite phase change materials (PCMs) integrating zero-energy thermal management, microwave absorption, photothermal therapy and electrical signal detection can promote the leapfrog development of flexible wearable electronic devices. For this goal, we propose a multidimensional collaborative strategy combining two-dimensional (2D) MXene nanosheets with metal-organic framework-derived one-dimensional (1D) carbon nanotubes (CNTs) and zero-dimensional (0D) metal nanoparticles. After encapsulating paraffin wax (PW) in three-dimensional (3D) networked multidimensional MXene/CoNi–C, the resulting composite PCMs exhibit excellent thermal energy storage capacity and long-term thermally reliable stability. Benefiting from the synergistically enhanced photothermal effects of CNTs, Co/Ni nanoparticles and MXene, PW@MXene/CoNi–C can capture photons efficiently and transfer phonons quickly, yielding an ultrahigh photothermal conversion and storage efficiency of 97.5%. Additionally, PW@MXene/CoNi–C composite PCMs exhibit high microwave absorption with a minimum reflection loss of −49.3 dB at 8.03 GHz in heat-related electronic application scenarios. More attractively, the corresponding flexible phase change film can simultaneously achieve thermal management and electromagnetic shielding of electronic devices, as well as photothermal therapy and electrical signal detection for individuals. This functional integration design provides an important reference for developing advanced flexible multifunctional wearable materials and devices.
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Water
·
2024
·Vol. 16
·期 11
·1504
·
IF 3
Dongyang Zhang,Kunfu Li,Lei Fang,Huishan Chen
In this research, the CuFeS2/MXene-modified polyvinylidene fluoride (PVDF) membrane was prepared to activate peroxymonosulfate (PMS) to remove moxifloxacin (MOX) and its morphology; surface functional groups and hydrophilicity were also studied. The parameters of the catalytic membrane/PMS system were optimized, with an optimal loading of 4 mg/cm2and a PMS dosage of 0.20 mM. High filtration pressure, alkaline conditions, and impurities in water could inhibit MOX removal. After continuous filtration, the removal efficiency of MOX using the catalytic membrane/PMS system and PVDF membrane was 68.2% and 9.9%, respectively. Batch filtration could remove 87.8% MOX by the extra 10 min contact time between the catalytic membrane and solution. During the filtration process, CuFeS2/MXene on the surface of the catalytic membrane activated PMS to produce SO4•−, HO•, and1O2, and MOX was removed through adsorption and degradation. Taking humic acid (HA) as the model foulant, reversible fouling resistance in the catalytic membrane/PMS system was 22.8% of the PVDF membrane. The catalytic membrane/PMS system weakened the formation of the cake layer by oxidizing HA into smaller pollutants and followed the intermediate blocking cake filtration model. The novelty of this research was to develop a CuFeS2/MXene–PVDF membrane-activated PMS system and explore its application in antibiotics removal.
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ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiaodong Qian,Congling Shi,Mei Wan,Honglei Che,Junyi Li
To improve the interface interaction between MXene and the polymer matrix, CoNi-ZIFs were adopted to modify MXene through an in situ preparation method. The nanohybrid flame retardants were introduced into epoxy polymers (EPs) to improve the thermal stability, flame resistance, and smoke reduction capabilities of the EP nanocomposites. Based on the above design, the nanohybrid flame retardants exhibit excellent synergistic flame retardant effects. Compared with the MXene and CoNi-ZIF-based EP nanocomposites, the performance in terms of thermal stability, flame resistance, and smoke reduction capabilities of EP/CoNi-ZIF/MXene nanocomposites has been significantly improved. 2 wt % CoNi-ZIF/MXene in EP can improve the residual carbon content of nanocomposites to 18.78% at high temperature and reduce the peak heat release rate (pHRR) by 22.68%, and the release of the smoke production rate (SPR), CO, and CO2 for the nanocomposites is also inhibited simultaneously. The notable decrease in the fire risk of EP largely stems from the catalytic carbonization of transition metals and the synergistic and physical barrier effects of the CoNi-ZIF/MXene nanohybrids.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yunqing He,Leilei Zhao,Xiao Guo,Xiya Yang,Binghong Luo,Mingxian Liu
With the rapid development of smart wearable electronics, self-powered devices are urgently needed to overcome the limitations of conventional power sources. The single electrode triboelectric nanogenerator (TENG) attracts much attention owing to its simple fabrication, carrying convenience, and easy use as a power source for wearable electronic devices. Herein, a flexible, responsive, and multifunctional single electrode TENG based on renewable chitin nanocrystals (ChNCs) and MXene composite film (CM-TENG) is developed. ChNCs act as interfacial adhesives to facilitate the assembly of the MXene nanosheets, which significantly improves the composite film's mechanical properties and electrical conductivity. Positively charged ChNCs neutralize the negative charges of MXene nanosheet surfaces, enabling the composite film to rapidly transfer charges during the electrostatic induction process. The output performance of the CM-TENG can achieve 99.5 mW m −2 power density so it can be utilized for self-powered strain and tactile sensors. This work presents a new strategy for constructing stable and flexible power sources and self-powered sensors via electrostatic-driven self-assembled of ChNCs and MXene, which shows promising application in low frequency mechanical energy harvesting and self-powered wearable electronics.
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