CARBON
·
2024
·
IF 10.5
Jinyi Wu,Dan Liu,Yuxuan Sun,Bokun Wei,Kun Dai,Yiqing Sun,Fei Zhang,Chuanbing Li,Jie Xue,Zifu Zhu,Xiaobo Gao,Qingbin Zheng
Solar steam generation (SSG) has been considered as a promising method to produce fresh water from seawater. Due to high light absorption and excellent chemical stability, carbon nanotube (CNT) has been widely used for SSG. However, it is still challenge to simultaneously realize high water evaporation rate and energy efficiency for CNT based solar steam generator. Herein, ultralight anisotropic Ti 3 C 2 T x MXene/carbon nanotube (A-Ti 3 C 2 T x /CNT) aerogels are designed and fabricated for highly efficient SSG. The combination of CNT and Ti 3 C 2 T x MXene endows the hybrid aerogel with high light absorption and effective localized surface plasmon resonance (LSPR), resuting in enhanced light-to-heat conversion efficiency. The porous structure of aerogel leads to multiple scattering and absorption, further contributing to the photothermal conversion process. Moreover, the low thermal conductivity of aerogel structure effectively reduces the heat loss to environment. Through tailoring the anisotropic channel, the A-Ti 3 C 2 T x /CNT hybrid aerogel with average channel size of 80 μm possesses most efficient water transport due to the capillary effect and formation of intermediate water. Therefore, the A-Ti 3 C 2 T x /CNT hybrid aerogel exhibits high average light absorption of 95.68% in the wavelength range of 200–2500 nm, excellent water evaporation rate of 2.10 kg m −2 h −1 under 1 sun irradiation (1 kW m −2 ) with a high energy efficiency of 93.4%, and remarkable durability with 7 days continuous water evaporation. The A-Ti 3 C 2 T x /CNT hybrid aerogel also shows high resistance to salt crystallization due to its high salt transport flux of 1.90 kg m −2 h −1 . This work offers a prospective strategy for constructing highly efficient solar steam generator with stable performance for practical application in seawater desalination.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 7
·2889-2897
·
IF 2.5
Yanan Zhu,Yongchang Yang,Shiqiang Li,Chang Zhu,Zegang Qiu,Qianqian Zhu
The development of efficient materials for adsorption desulfurization has attracted much attention for the safety of humans and the ecosystem. Metal–organic frameworks have shown promise in removing organic sulfur compounds in liquid fuels, while another star material – MXene has rarely been applied in this field. In this study, Ti3C2Tx MXene/Cu-MOF composites with different MXene contents (3.3%, 6.7%, and 13.3%) were synthesized via an in situ precipitation method. Characterization showed that the Cu-MOF was successfully coated on the surface of Ti3C2Tx MXene and partially embedded between the MXene nanosheets, restraining the agglomeration of both MXene and the Cu-MOF. The optimal composite-3.3%MXene/Cu-MOF presented the largest surface area of 166.6 m2 g−1. Compared to MXene and Cu-MOF, 3.3%MXene/Cu-MOF exhibited an enhanced adsorption performance for methyl phenyl sulfide in the model fuel with an equilibrium adsorption capacity of 87.4 mg g−1. Furthermore, the effects of adsorption parameters, adsorption kinetics, adsorption isotherms, and the adsorption mechanism, and regenerative performance of 3.3%MXene/Cu-MOF were comprehensively discussed. A pseudo-second order kinetic model and the Langmuir adsorption isotherm were found to better explicate the adsorption behavior on 3.3%MXene/Cu-MOF, which exhibited a theoretical maximum adsorption capacity of 183.9 mg g−1. This work hopes to shed light on the material design for adsorption desulfurization.
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Nano-Micro Letters
·
2024
·Vol. 17
·期 1
·1-15
·
IF 31.6
Xiao Yanan,Li He,Gu Tianyi,Jia Xiaoteng,Sun Shixiang,Liu Yong,Wang Bin,Tian He,Sun Peng,Liu Fangmeng,Lu Geyu
Emphasized the innovation in both the material design and methodology between the sensing performance and mechanical properties.
The composite aerogel pressure sensors exhibited low hysteresis (13.69%), wide detection range (6.25 Pa-1200 kPa), and cyclic stability to acquire stable and accurate pronunciation signals.
Over 6888 and 4158 pronunciation signals were collected by the pressure sensor and utilized for training the convolutional neural network model, allowing for accurate recognition of six dialects (96.2% accuracy) and seven words (96.6% accuracy).
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高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Wei Yang,Qiankun Han,Wenshi Li,Maosheng Wu,Jing Yao,Man Zhao,Xianmao Lu
Redox-enhanced electrochemical capacitors (redox ECs) are promising energy-storage devices with the potential to deliver both high power and energy performances, although overcoming the severe self-discharge remains a great challenge due to the shuttle effect of redox species such as I − /I 3 − ions introduced in the electrolytes for gaining additional capacities. Herein, we propose a cation-initiated self-assembly process of Ti 3 C 2 T x MXene nanosheets onto glass fiber membranes to form Janus separators that can mitigate the shuttling of I − /I 3 − ions in iodine-based redox ECs. The interlayer spacing of the MXene films can be controlled by selecting different cations such as imidazolium (C 4 mim + ), Mg 2+ , and Al 3+ , therefore the resulting Janus separators exhibit tailored nanochannels for ion sieving. Both molecular dynamic (MD) simulations and electrochemical tests indicate that C 4 mim + -intercalated MXene Janus separators (C 4 mim + -MXene) can block the diffusion of I 3 − ions while allowing the pass of other electrolyte ions. As a result, self-discharge caused by the shuttle effect can be much reduced in C 4 mim + -MXene-based redox ECs, which deliver voltage and energy retentions substantially higher than that of the cells using glass fiber membrane separators (voltage retention: 70% vs. 10%, energy retention: 51% vs. 6.5%) after 24-h open-circuit test.
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Advanced Science
·
2022
·Vol. 9
·期 16
·2201118
·
IF 17.521
Minghang Li,Wenjie Zhu,Xin Li,Hailong Xu,Xiaomeng Fan,Hongjing Wu,Fang Ye,Jimei Xue,Xiaoqiang Li,Laifei Cheng,Litong Zhang
Heterogeneous interface design to boost interfacial polarization has become a feasible way to realize high electromagnetic wave absorbing (EMA) performance of dielectric materials. However, interfacial polarization in simple structures such as particles, rods, and flakes is weak and usually plays a secondary role. In order to enhance the interfacial polarization and simultaneously reduce the electronic conductivity to avoid reflection of electromagnetic wave, a more rational geometric structure for dielectric materials is desired. Herein, a Ti 3 C 2 T x /MoS 2 self-rolling rod-based foam is proposed to realize excellent interfacial polarization and achieve high EMA performance at ultralow density. Different surface tensions of Ti 3 C 2 T x and ammonium tetrathiomolybdate are utilized to induce the self-rolling of Ti 3 C 2 T x sheets. The rods with a high aspect ratio not only remarkably improve the polarization loss but also are beneficial to the construction of Ti 3 C 2 T x /MoS 2 foam, leading to enhanced EMA capability. As a result, the effective absorption bandwidth of Ti 3 C 2 T x /MoS 2 foam covers the whole X band (8.2–12.4 GHz) with a density of only 0.009 g cm −3 , at a thickness of 3.3 mm. The advantages of rod structures are verified through simulations in the CST microwave studio. This work inspires the rational geometric design of micro/nanostructures for new-generation EMA materials.
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhen Wan,Cheng Li,Ronghui Liu,Wei Zhou,Wenjing Fan,Chuanxue Huang,Yang Liu
Two-dimensional (2D) Ti3C2Tx MXene materials show great potential in electrochemical and flexible sensors due to their high electrical conductivity, good chemical stability, and special delaminated structure. However, their thermal properties were rarely studied, which remarkably affect the stability and safety of various devices. Here, we fabricated a suspended MXene drum resonator photothermally driven by a sinusoidally modulated laser, measured the thermal time constant by demodulating the thermomechanical motion, and then calculated the thermal conductivity and thermal diffusivity of the MXene film. Experiments show the thermal conductivity of the film increases from 3.10 to 3.58 W/m·K while the thermal diffusivity from 1.06 × 10–6 to 1.22 × 10–6 m2/s when temperature increases from 300 to 360 K. We also confirm the film thermal conductivity is mainly contributed by phonon transport rather than electron transport. Furthermore, the relationship between the mechanical and thermal properties of the MXene films was disclosed. The thermal conductivity decreases when film strain increases, caused by enhanced phonon scattering and softening of high-frequency phonons. The measurements provide a noninvasive method to analyze the thermal characteristics of suspended MXene films, which can be further extended to the thermal properties of other 2D materials.
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PubMed
高影响因子
Scientific Reports
·
2024
·Vol. 14
·期 1
·1-10
·
IF 3.8
Zhu Dancheng,Wu Yifan,Zheng Kai,Xu Hao,Chen Chao,Qiao Jun,Shen Chao
In this study, we deposited Ti 3 C 2 T x -modified, rare-earth-doped PbO 2 on the surface of a carbon fabric via electrodeposition. The surface morphology and electronic structure of the electrode were characterized with SEM, XRD and XPS. The layered Ti 3 C 2 T x did not change the structure of β-PbO 2 , and at the same time, it improved the crystallinity of the material and reduced the grains of PbO 2 . Electrochemical experiments showed that the addition of Ti 3 C 2 T x increased the electrochemical activity of the electrode and produced more H 2 O 2 , which contributed to the degradation of pollutants. The efficiency of sulfamethoxazole (SMX) degradation reached 95% after 120 min at pH 3 with a current density of 50 mA/cm 2 . Moreover, the electrode has good cycling performance, and the degradation efficiency was still 80% after 120 min after 10 cycles of recycling. Based on the intermediates identified by HPLC‒MS, a mechanism for SMX degradation was proposed. Our results will provide a new idea for the development of efficient electrocatalytic degradation of antibiotics.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Lanlan Gao,Hong Wang,Yunlei Zhou,Zhipeng Tian,Huanshun Yin,Jun Wang
MXene-based Ti 3 C 2 T X composite aerogels (βCD-MXene-SA) were prepared using thin layers of MXene and sodium alginate (SA) as matrix materials, β-cyclodextrin (β-CD) as surface modifier, and epichlorohydrin as cross-linker. The βCD-MXene-SA was characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared (FTIR) spectroscopy, and the results demonstrated that the βCD-MXene-SA had a larger specific surface area and a more developed pore structure. In addition, the maximum adsorption capacity of this βCD-MXene-SA for dibutyl phthalate (DBP) under the optimal adsorption conditions was 25 mg/g. The adsorption kinetics showed that the adsorption process was in good agreement with both kinetic models. The adsorption isotherms were consistent with the Langmuir and Freundlich adsorption isotherm models, suggesting that the adsorption of DBP by βCD-MXene-SA was the result of the combined effect of physisorption and chemisorption. The adsorption process may include monolayer adsorption on homogeneous surfaces and multilayer adsorption on multilayer surfaces. Outside, the ecotoxicological effects of DBP on crops were explored. The results showed that the treated wastewater could promote the growth of green beans, indicating that the toxicity of wastewater was significantly reduced after adsorption treatment.
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DESALINATION
·
2025
·
IF 9.8
Junzhi Li,Yanan Li,Haiyu Luo,Lili Tang,Nan Xu,Wenlan Ji,Shihao Zhang,Pei Nian,Yibin Wei
MXene-based membranes have emerged as promising candidates for seawater desalination due to their unique two-dimensional (2D) lamellar structures, excellent hydrophilicity, and tunable interlayer spacing. However, challenges such as poor salt rejection, and structural instability hinder their broader application. Herein, we present novel Ti 3 C 2 T x MXene membranes owing cyclodextrin (CD)-embedded polyester network between their interlayers through trimesoyl chloride (TMC)-induced interfacial crosslinking, which not only promotes the formation of stable cross-links between the layers of the MXene nanosheets but also enhances their desalination performance. Various characterization methods were used to demonstrate the successful preparation of the Ti 3 C 2 T x MXene-based membranes cross-linked with the specific polyester networks. Using the same dosage of CDs, the membranes modified with α-CD, β-CD and γ-CD were comparatively investigated. The membrane embedded with 5 mg of α-CD exhibited the optimal desalination performance with rejection of 93.96 %, 93.00 %, 85.88 % and 76.25 % for MgSO 4 , Na 2 SO 4 , MgCl 2 , and NaCl, respectively, and water permeabilities ranging from 93.00 to 149.06 L·m −2 ·h −1 ·bar −1 . Moreover, the Na + and Mg 2+ transport mechanisms within the prepared membrane nano-channels were further investigated by molecular dynamics (MD) simulations. This work offers an innovative approach by introducing CD/TMC interfacial crosslinking to 2D lamellar-structured membranes, providing a high-performance solution for desalination.
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CARBON
·
2024
·
IF 10.5
Junyu Lu,Lei Xu,Cheng Xie,Qun Wei,Qilin Jiang,Guangsheng Yao,Zhaohui Han
The rapid development of modern wireless communication technology makes electromagnetic wave pollution increasingly serious, necessitating the development of high-performance electromagnetic wave-absorbing materials. This study introduces a Ti 3 C 2 T x MXene hybrid carbon foam (HCF) that exhibits a tunable and efficient electromagnetic wave absorption performance. The HCF features a porous, multilayered structure, which enhances its multi-reflection properties, and a heterogeneous interface between the carbon foam and MXene boosting its dielectric loss. By regulating the content of MXene, the ratio of polarization loss to conduction loss can be regulated to achieve better impedance matching. As a result, the HCF demonstrated superb electromagnetic wave absorption performance with RL min = −72.25 dB and EAB max = 6.55 GHz. Furthermore, the minimum absorption frequency domain could be tuned within 8–14 GHz by varying the MXene content. The performance in radar wave absorption and electromagnetic-thermal conversion (ramp rate 85.81 °C/s from RT to 200 °C) proves that HCF is an efficient and reliable electromagnetic wave absorber, suitable for radar technology, microwave heating, and communication systems applications.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yirong Qi,Jianfeng Huang,Liyun Cao,Xingang Kong,Liangliang Feng,Haijun Ma,Faliang Luo,Qingqing Liu,Ying Wang,Wenchao Li,Wei Liang,Xin Hao,Ayumu Onda,Yongqiang Feng
Photoelectrocatalytic water splitting represents a sustainable strategy for producing “green hydrogen” through visible-light-driven hydrogen evolution (HER) and oxygen evolution reactions (OER) under applied bias. The advancement of cost-effective photoelectrode materials with high efficiency and durability remains imperative, as single-component semiconductors often suffer from inadequate bandgap alignment, inefficient carrier separation, and insufficient stability. Herein, we fabricate Bi 2 WO 6 /Ti 3 C 2 T x -800 composite photoanodes on recyclable carbon felt (CF) substrates via electrophoretic deposition. By strategically modulating the work function at the Mott-Schottky junction of Bi 2 WO 6 /Ti 3 C 2 T x -800, we precisely tailored the energy band structure of Bi 2 WO 6 , enhancing its carrier separation efficiency and light absorption. The optimized system delivers a photocurrent density of 6.44 mA cm −2 at 1.23 V vs. reversible hydrogen electrode (RHE), alongside an applied bias photon-to-current efficiency (ABPE) of 0.73 % at 1.08 V and a charge-transfer efficiency (η tran ) of 74.68 % at 1.23 V, surpassing most reported Bi 2 WO 6 -based counterparts. This work establishes a robust design paradigm for high-performance photoanodes, advancing scalable solar-driven water-splitting technologies.
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高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Changhua Li,Chao Zhang,Jianxiu Hu,Wei Ren,Jing Zhang,Yi He
This research reported the outstanding composite coating for anti-corrosion and anti-wear applications doped with Ti 3 C 2 Tx-(3-aminopropyltriethoxysilane, APTES)- silicon nitride (Si 3 N 4 ) fortifier, which was prepared via the bridge linking effect of the silane coupling agent APTES between Ti 3 C 2 Tx and Si 3 N 4 particles. Taking advantage of the lubricating property of Ti 3 C 2 Tx, the high hardness of Si 3 N 4 and the coupling effect of APTES, the interfacial strength between the composite filler and resin matrix was enhanced, achieving the integrated multi-functional properties of lubrication, wear resistance and corrosion prevention for the composite coating. Compared to the epoxy coating sample, adhesion strength, tensile strength and hardness showed obvious improvement, leading to excellent friction performance and anti-wear property, which were demonstrated through an ultra-low coefficient of friction (COF) of 0.046 and small wear loss of 18.6 mg (CS-17 abrasive wheel, 1000 revolutions, load of 9.8 N). Moreover, the composite coating exhibited satisfactory anti-corrosion capacity, which could be illustrated by the impedance modulus at 0.01 Hz (| Z | 0.01Hz ) remaining at 1.07 × 10 8 Ω cm 2 after the accelerated cyclic electrochemical test (−3.0 V, 30 min) of 6 cycles. The coating reported in this study made use of the advantages of two-dimensional MXene and zero-dimensional silicon nitride, and had remarkable breakthroughs in anti-corrosion and wear properties, which provided a simple and feasible idea for the optimization of coatings.
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