JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Yong Liu,Xudong Liu,Shangli Dong,Xuefeng Zhang,Yidan Wei,Lu Lv,Sirui He
The closely restacked MXene nanosheets obstruct electrolyte ion transfer in electrodes, limmiting the electrochemical performance at a high charging-discharging rate. Although various 3D porous structures have been constructed, size effect of porous MXenes electrodes has been rarely studied. Herein, the classical metal ion-assisted method was used to fabricate 3D porous MXene films. The pore size distribution was changed by adjusting the cation valency. Noteworthy, when the mesoporous pore size distribution is in the range of 5 ∼ 10 nm, the porous structure can significantly improve the electrochemical performance and the presence of micropores can increase the proportion of surface capacitance. As a result, the porous Ti 3 C 2 T x film treated by Mg 2+ showed outstanding electrochemical performance, with both high capacity (420F/g at 2 mV/s) and good cyclic stability (94.4% retention after 5000 cycles). This work presents a study on how pore size distribution of porous MXene film effects the electrochemical performance and provides a reference for the design of 3D porous MXene electrodes.
研究领域:
材料科学
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电化学
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储能技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
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2024
·Vol. 191
·期 8
·1-10
·
IF 5.3
Feng Lei,Chen Junji,Yang Min,Wang Juan,Yin Shougen,Zhang Deliang,Qin Wenjing,Song Jibin
Ti 3 C 2 T x MXene/Cu x O composites were prepared by acid etching combined with electrochemical technique. The abundant active sites on the surface of MXene greatly increase the loading of Cu x O nanoparticles, and the synergistic effect between the different components of the composite can accelerate the oxidation reaction of glucose. The results indicate that at the working potential of 0.55 V (vs. Ag/AgCl), the glucose sensor based on Ti 3 C 2 T x MXene/Cu x O composite presents large linear concentration ranges from 1 µM to 4.655 mM (sensitivity of 361 µA mM −1 cm −2 ) and from 5.155 mM to 16.155 mM (sensitivity of 133 µA mM −1 cm −2 ). The limit of detection is 0.065 µM. In addition, the sensor effectively avoids the oxidative interference of common interfering species such as ascorbic acid, dopamine and uric acid. The sensor has good reproducibility, stability and acceptable recoveries for the detection of glucose in human sweat sample (97.5-103.3%) with RSD values less than 4%. Based on these excellent properties it has great potential for the detection of glucose in real samples. Graphical abstract
研究领域:
材料科学
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生物传感
·
电化学分析
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产品关联
DOI
PubMed
高影响因子
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.
研究领域:
材料科学
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能源工程
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环境科学
✓ 已验证
产品关联
DOI
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.
研究领域:
环境科学
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材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Yuntong Wen,Hao Bian,Yongpeng Ran,Yonghao Xie,Minmin You,Huimin Wen,Liyun Shi,Jingquan Liu,Zude Lin
The 2D Ti 3 C 2 T x MXene anchored with magnetic particles has garnered significant attention due to its superior electromagnetic shielding performance and low reflection coefficient. However, current research on MXene-anchored magnetic particles faces several challenges, including complex fabrication processes, difficulty in controlling compositional ratios, the predominant use of spherical magnetic particles. In this work, by employing surfactants, FeCo alloy and Ni flakes were uniformly anchored onto MXene, the preparation process of the composite is simple and facilitates better control over the ratios of individual samples. Due to the unique structure formed by the intercalation of FeCo alloy and Ni flakes within the MXene layers, M-FC-N-35 exhibits an average electromagnetic shielding effectiveness of 61.2 dB within the Ku-band and maintains a reflection coefficient as low as 0.69. Additionally, the M-FC-N-35 composite was applied to the surface of the temperature sensor casing. It was found that under an electromagnetic field strength of 200 V/m and within a frequency range of 6–18 GHz, the temperature measurement deviation was reduced to 9.35 % of that of the sensor without the shielding material, demonstrating high electromagnetic interference resistance. This work provides guidance for simplifying the fabrication process of MXene composites with magnetic metals and enriching the system of electromagnetic shielding materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jingxuan Cui,Jiao Wu,Aihu Feng,Yang Yu,Le Mi,Yun Yu
As a novel material with low infrared emissivity, Ti 3 C 2 T x MXene is promising in infrared stealth. However, the problem that MXene is easily oxidized poses a great challenge to its practical applications. In this paper, a tannic acid (TA) enhanced MXene oxidation stability composite film with low infrared emissivity is reported. TA effectively diminishes the pore size within the MXene film and leads to a tight and orderly arrangement of nanosheets, maintaining the low emissivity properties of Ti 3 C 2 T x MXene itself. In addition, TA reacts preferentially with H 2 O/O 2 entering the film to consume the oxidizing source, while also being able to form coordination with Ti atoms for protection against oxidation, resulting in the composite film exhibiting excellent oxidation resistance. Remarkably, there is no formation of TiO 2 and the emissivity only rises from 0.16 to 0.18 after 72 h in the humid heat environment. Even after prolonged exposure to 20-day humid heat, it still maintains exceptional infrared emissivity (0.24) and stealth performance (reducing the radiant temperature of the object from 94 °C to 47.4 °C, △T = 46.6 °C). In contrast, the original Ti 3 C 2 T x MXene film has lost its infrared stealth performance after 10-day humid heat (△T = 5.3 °C) with an infrared emissivity of 0.76. This paper provides a new strategy to solve the problem of MXene performance stability in humid and oxidizing environments.
研究领域:
材料科学
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纳米技术
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表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
·
IF 9.038
Zhengyou Zhu,Congcong Liu,Fengxing Jiang,Jing Liu,Xiumei Ma,Peng Liu,Jingkun Xu,Lei Wang,Rui Huang
Rational and smart design of hydrogen (H 2 ) sensors especially those featured with flexibility and light weight is highly desirable, to meet the requirements for future development of portable H 2 sensors. In this work, we demonstrate a novel paper film H 2 sensor employing Ti 3 C 2 T x MXene nanosheets with Pd colloidal nanoclusters (Pd CNC) as the activator. The MXene@ Pd CNC paper film was facilely prepared via an all-colloidal solution-based vacuum-filtration process, which is flexible, light-weight and endowed with a compact, glossy surface. The as-obtained MXene@ Pd CNC film sensor displayed moderate H 2 response at room temperature at either flat or bent states. Specially, the MXene@Pd CNC film sensor delivered a response time of (32 ± 7) s and a sensitivity of S = (23.0 ± 4.0)%@4% H 2 . In addition, the MXene@Pd CNC sensor enabled “in-situ-mode” H 2 detection directly along a piece of paper film with desired size. The strong H 2 adsorption into lattice of ultrafine Pd CNC altered the work function thus induced the electron doping of MXene, which explained the gas sensing mechanism. Therefore, the facilely designed MXene@Pd CNC sensor is believed to contribute to development of future portable and wearable sensing electronics.
研究领域:
材料科学
·
传感器技术
·
纳米科技
✓ 已验证
DOI
PubMed
高影响因子
ACS Nano
·
2020
·
IF 14.588
Jiani Zhu,Lei Wang,Jin Wang,Fudi Wang,Mengtao Tian,Shuchang Zheng,Ning Shao,Lele Wang,Miaolu He
Two-dimensional (2D) membranes exhibit exceptional properties in molecular separation and transport, which reveals their potential use in various applications. However, ion sieving with 2D membranes is severely restrained due to intercalation-induced swelling. Here, we describe how to efficiently stabilize the lamellar architecture using Keggin Al13 polycations as pillars in a Ti3C2Tx membrane. More importantly, interlayer spacing can be easily adjusted with angstrom precision over a wide range (2.7–11.2 Å) to achieve selective and tunable ion sieving. A membrane with narrow d-spacing demonstrated enhanced selectivity for monovalent ions. When applied in a forward osmosis desalination process, this membrane exhibited high NaCl exclusion (99%) with a fast water flux (0.30 L m–2 h–1 bar–1). A membrane with wide d-spacing showed notable selectivity, which was dependent on the cation valence. When it was applied to acid recovery from iron-based industrial wastewater, the membrane showed good H+/Fe2+ selectivity, which makes it a promising substitute for traditional polymeric membranes. Thus, we introduce a possible route to construct 2D membranes with appropriate structures to satisfy different ion-sieving requirements in diverse environment-, resource-, and energy-related applications.
研究领域:
材料科学
·
环境工程
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Qiong Zhang,Dewen Xu,Yunfa Si,Renxin Xu,Bailu Luo,Shuangyuan He,Dan Liu
As a recently emerging 2D material, Ti3C2TX MXene, with some distinct characters, might bring opportunities for developing advanced microwave absorption materials (MAMs). Although the multilayered MXene with an accordion-like structure has been used as the building blocks to obtain composite MAMs, the exfoliated MXene (eMXene) nanosheets have rarely been explored. Herein, we construct a hierarchically structured MXene-based composite by simultaneously decorating magnetic nanosheets/particles onto eMXene sheets for an efficient microwave absorption. Systematic ex situ characterizations reveal that the eMXene sheets can act as a structure-directing agent and host to allow an interlaced growth of ultrathin CoO nanosheets and spherical Co@C nanoparticles onto their surfaces. Such structural design impedes the agglomeration of eMXene sheets and magnetic nanounits while guaranteeing the adequate exposure of polar functional groups on MXene surfaces. Meanwhile, the introduction of dual magnetic phases enables an additional magnetic loss capability and also builds massive void spaces and rich heterointerfaces between various nanounits for a significantly enhanced dielectric polarization loss, resulting in a superior impedance matching and attenuation capability. Accordingly, the optimal composite exhibits a minimum reflection loss of −73.4 dB at a thin thickness of 2.1 mm and an effective absorption bandwidth up to 5.6 GHz (12.4–18.0 GHz) at a thin thickness of 1.8 mm. This study might stimulate the further development of exfoliated MXene-based composite microwave absorbers with hierarchical structures.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Guoyu Yang,Xuming Yao,Yujun Li,Yi Hu,Xing Chen,Jialiang Li,Junzhen Chen,Jianjun Jiang
Owing to its excellent electronic properties, Ti3C2Tx MXene is an emerging class of two-dimensional nanomaterials that have a promising electromagnetic (EM) wave function; however, poor impedance matching has limited the application of these materials in absorption-dominated EM interference (EMI) shielding. Hence, the investigation of thin MXene nanosheet-based film materials for application to absorption-dominated EMI shielding, which produces less EM pollution than reflection-dominated EMI shielding materials, is essential. In this study, a Ti3C2Tx/carbonyl iron–aramid hybrid film possessing absorption-dominated EMI shielding properties was prepared by using flower-like core–shell Ti3C2Tx/carbonyl iron microspheres (Ti3C2Tx/CIs) and aramid nanofibers. In the X band, the EMI shielding effectiveness of the films reached 31.9 dB with a lower SER value (below 3 dB), which means that less than 50% of the reflected incident waves and secondary EM pollution were reduced by the EMI shielding film materials. These results were attributed to superior impedance matching and multiple dissipation mechanisms of the Ti3C2Tx/CIs nanocomposites, which substantially enhanced the EM-wave absorption properties of a single MXene. The experimental results indicated that Ti3C2Tx/CIs nanocomposites showed a minimum reflection loss of −50.8 dB at 7.84 GHz. Moreover, a maximum effective absorption bandwidth of 5.5 GHz (12.48–18 GHz) was obtained at 1.60 mm, almost covering the entire Ku band. Therefore, this work provides a framework for designing MXene-based absorption-dominated EMI shielding nanocomposites.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2021
·
IF 4.464
Zicheng Li,Yingkui Guo,Hongyan Yue,Xin Gao,Shuo Huang,Xiaohua Zhang,Yanfei Yu,Haopeng Zhang,Hengwei Zhang
EP is an important natural catecholamine neurotransmitter in the central nervous system, and the change of EP concentration will lead to many diseases. Therefore, rapid and sensitive detection of EP is of great significance for clinical research. The Ti 3 C 2 T x MXene dispersion obtained by in-situ HF etching Ti 3 AlC 2 was mixed with graphene oxide (GO) dispersion synthesized by the modified Hummers method. After freeze drying and heat-treatment, the reduced graphene oxide/Ti 3 C 2 T x MXene (GMA) was obtained and then the GMA was moved onto indium tin oxide (ITO) as the GMA/ITO working electrode for electrochemical detection of epinephrine (EP). The results are as follows: Ti 3 C 2 T x MXene with a diameter of approximately 150 nm is uniformly distributed on the surface of the 3D graphene. The three-dimensional structure of GMA facilitates the entry of bioactive molecules and increases the contact area. GMA/ITO has a high sensitivity for the determination of EP 3.74 μA·μM −1 ·cm −2 . Moreover, the electrode shows a very low detection limit, well repeatability and stability, and it can detect the EP content in real urine samples.
研究领域:
生物医学工程
·
神经科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Hao Xu,Shuai Liu,Zhiang Li,Fan Ding,Weimin Wang,Kaikai Song,Ting Liu,Lina Hu
All-solid-state lithium batteries (ASSLBs) are important for enhancing safety across various applications related to lithium-ion batteries (LIBs). Lithium iron phosphate (LiFePO 4 ) is a widely utilized commercial cathode in LIBs, prized for its stable cycling performance, thermal stability, and low cost. However, low electronic conductivity and slow ion diffusion kinetics limit its application at high rates and low temperatures. Herein, Ti 3 C 2 T x MXene nanosheets (NSs) are introduced into the LiFePO 4 cathode. The continuous electron-conducting networks are constructed due to the high electrical conductivity of Ti 3 C 2 T x NSs. Meanwhile, the coordination environment of lithium ions in the cathode is weakened by the oxygenated end groups of Ti 3 C 2 T x NSs, and thus efficient ion-percolating networks are constructed. Therefore, the ionic and electronic conductivities of the modified cathode are significantly improved. Assembled all-solid-state LiFePO 4 /Li full cells with poly(ethylene oxide) as electrolyte exhibits high initial discharged capacities of 91.5 mAh g −1 at 10 C, and capacities of 155.1 mAh g −1 after 1000 cycles at 1 C with a retention rate of 93.8%. Furthermore, the cells still deliver excellent performance at high loading, room temperature, and low temperature. This work offers a facile and scalable strategy for designing high-performance ASSLBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）