INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
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IF 8.3
Xiangjun Liu,Jingjing Ma,Shuai Zhang,Guo-Wei Guan,Qing-Yuan Yang,Junqi Wang
Harvesting solar energy to drive highly efficient photocatalytic conversion of renewable biomass to value-added chemicals and H 2, is a green and promising strategy to acquire clean H 2 with high energy density. In this study, CdS nanoparticles/Ti 3 C 2 T x nanosheets (Ti 3 C 2 T x /CdS composites) photocatalysts were prepared by a hydrothermal strategy. With an optimized Ti 3 C 2 T x loading of 0.8 wt%, the Ti 3 C 2 T x /CdS composites exhibited a significant enhancement in the photocatalytic H 2 evolution reaction with long-term stability, reaching 20,427 μmol·g −1 ·h −1 , compared to the pristine CdS (1,999 μmol·g −1 ·h −1 ). The Ti 3 C 2 T x /CdS-0.8 reflects appropriate electronic band structure and excellent conductivity, resulting in efficiently generation and migration of photoinduced electrons. In addition, the apparent quantum yield of Ti 3 C 2 T x /CdS-0.8 was 9.4% at 420 nm, higher than that of pristine CdS (1.2%). Superior results (7,164 μmol·h −1 ·g −1 ) were also achieved in the conversion of raw biomass to H 2 under natural sunlight. Achieving solar-driven H 2 production from biomass represents a significant step forward in contributing to sustainable and clean energy practices.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Renjie Ding,Haowen Zheng,Xu Zhao,Fuhua Xue,Pengyang Li,Jinhua Xiong,Zhong Chen,Zonglin Liu,Qingyu Peng,Xiaodong He
The excellent chemical, mechanical or physical functionalities of two-dimensional nanomaterials can be better performed by assembling two-dimensional nanosheets into crumpled structures. Herein, inspired by the wrinkles on human skin, we demonstrated a simple method to create out-of-plane crumpled surface morphology based on the expanding-shrinking process of tissue. The unique crumpled structure largely raises the fracture strain of Ti 3 C 2 T x MXene/Tissue composite film , which reaches 30.48%, while the tensile strength also shows an increasement to 28.63 MPa. The EMI shielding performance improved by the internal scattering achieves 77.0 dB. With vertically aligned Ti 3 C 2 T x nanosheets formed by the crumples, the through-plane thermal conductivity reached 1.12 W m −1 K −1 is obtained. Moreover, the enhanced photothermal conversion performance caused by the large specific surface area improves the solar-driven water evaporation rate to 1.85 kg m -2 h −1 . This work exhibits a novel method for fabricating multifunctional crumpled Ti 3 C 2 T x MXene composite film.
研究领域:
材料科学
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纳米技术
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能源与环境
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
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2020
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IF 0
Ling Jin,Chenglong Wu,Kang Wei,Lifang He,Hong Gao,Hexin Zhang,Kui Zhang,Abdullah M. Asiri,Khalid A. Alamry,Lei Yang,Xiangfeng Chu
A series of polymeric titanium carbide (Ti3C2Tx) MXene composites were prepared by in situ polymerization of 3,4-ethylenedioxythiophene (EDOT) and poly(4-styrenesulfonate) (PSS) on Ti3C2Tx MXene materials. The resulting PEDOT:PSS/MXene composites were fabricated into a gas sensor using a dip coating technique. The composite sensor was able to measure ammonia (NH3) at room temperature and showed a strong gas response of 36.6% against 100 ppm of NH3 with the response and recovery time of 116 and 40 s, respectively. In addition, the composite sensor exhibited enhanced sensing performance compared to both pure PEDOT:PSS- and Ti3C2Tx MXene-based sensors, demonstrating a synergistic effect between PEDOT:PSS polymers and Ti3C2Tx MXene 2D materials. These data suggested the great potential of using PEDOT:PSS/MXene composite sensors for room temperature detection of NH3.
研究领域:
材料科学
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传感器技术
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化学工程
✓ 已验证
DOI
INORGANIC CHEMISTRY
·
2023
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IF 4.6
Jin-Feng Jia,Tong Tong Hao,Pei-Hsuan Chen,Feng-Yi Wu,Wei Zhu,Sung-Fu Hung,Nian-Tzu Suen
Herein, we propose a simple yet effective method to deposit metal nanoparticles on Ti3C2Tx-MXene via direct electrosynthesis. Without using any reducing reagent or annealing under reducing atmosphere, it allows the conversion of metal salts (e.g., PtCl4, RuCl3·yH2O, IrCl3·zH2O, AgNO3, and CuCl2·2H2O) to metal nanoparticles with a small particle size (ca. 2 nm). Under these circumstances, it was realized that the support effect from Ti3C2Tx-MXene (electron pushing) is quite profound, in which the Ti3C2Tx-MXene support will act as an electron donor to push the electron to Pt nanoparticles and increase the electron density of Pt nanoparticles. It populates the antibonding state of Pt–Pt bonds as well as the adsorbate level that leads to a “weakening” of the ΔGH* in the optimal position. This rationalizes the outstanding activity of Pt/Ti3C2Tx-MXene (5 wt %, η10 = 16 mV) for the hydrogen evolution reaction (HER). In addition, this direct electrosynthesis method grants the growth of two or multiple types of metal nanoparticles on the Ti3C2Tx-MXene substrate that can perform dual or multiple functions as desired. For instance, one can prepare an electrocatalyst with Pt (2.5 wt %) and Ru nanoparticles (2.5 wt %) on the Ti3C2Tx-MXene support from the same synthetic method. This electrocatalyst (Pt_Ru/Ti3C2Tx-MXene) can display good electrocatalytic HER performance in both acid (0.5 M H2SO4) and alkaline electrolytes (1.0 M KOH).
研究领域:
材料科学
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电化学
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催化
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Kexuan Hu,Hehe Wang,Xiang Zhang,Hui Huang,Tai Qiu,Yang Wang,Chuanfang (John) Zhang,Limei Pan,Jian Yang
Light weight is one significant pursuit for microwave absorption (MA) materials. Generally, constructing foams with porous structure and low density as the absorber is one efficient way to reduce the absorber content and the quality of MA materials since the porous structure can effectively cause multiple reflections of electromagnetic waves and enhance the MA performance. Herein, we report a new and simple method for fabricating ultralight Ti 3 C 2 T x foams by hydrochloric acid induced self-assembly and freeze-drying, for which the pore structure and MA performance can be effectively regulated by pre-freezing temperature. The decrease of pre-freezing temperature from −20 °C to −196 °C results in a reduced pore size, more homogenous pore structure, a decreased electrical conductivity, a decreased dielectric constant and a significantly enhanced MA performance. 3.3 wt% Ti 3 C 2 T x foams was immersed into molten paraffin to prepare composites for the MA performance tests. Due to the synergy of multiple reflection, conductive loss and polarization relaxation, the Ti 3 C 2 T x foams pre-frozen at −196 °C shows the most superb and impressive MA performance, a minimum reflection loss (RL) of −50.6 dB at the thickness of 1.8 mm and an effective absorption bandwidth (EAB) of 4.2 GHz (13.8–17.6 GHz) at the thickness of 1.4 mm, and the EAB could be adjusted in a range of 11.9 GHz (6.1–18 GHz) by increasing the thickness from 1 mm to 3 mm. This is one of the most lightweight materials with excellent MA performance to our knowledge, which perfectly meet the combined pursuit of light weight, thin thickness, broad bandwidth and strong absorption. This work offers a simple strategy for constructing 3D porous Ti 3 C 2 T x -based foams facing the application such as MA, electromagnetic shielding, environmental governance, energy storage and sensors.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Jingyu Song,Yongqian Shen,Guibin Zhang,Mingxuan Sun,Mengyao Han,Xueyan Du
While two-dimensional lamellar materials, specifically Ti 3 C 2 T x MXenes, have shown great promise as wave-absorbing materials, the precise design of interlayer spacing poses a persistent challenge. In this study, Ti 3 C 2 T x MXene layers with adjustable interlayer spacings were crafted using a straightforward molecular welding technique. Through the incorporation of Ni nanoparticles onto the Ti 3 C 2 T x MXene layers using a combination of simple mechanical stirring and carbonation reactions, we successfully developed Ti 3 C 2 T x MXene/Ni/C composites featuring a distinct lamellar structure. A uniform dispersion of Ni nanoparticles on the surface of the Ti 3 C 2 T x MXene nanosheets was found with some of the nanoparticles intercalated into the layers. The Ti 3 C 2 T x MXene/Ni/C composites exhibited a maximum reflection loss (RL) value of −42.3 dB at 12.3 GHz, accompanied by an impressive effective absorption bandwidth (EAB) of 5.6 GHz. This outstanding absorption performance could be attributed to various factors, including the dielectric loss of the Ti 3 C 2 T x MXene lamellae, reflections and scattering of multiphase heterostructures, the magnetic loss of the Ni nanoparticles, and their synergistic attenuation. Furthermore, Ni nanoparticles with high electrical conductivity induced vortex currents under the alternating influence of electromagnetic waves (EMWs), resulting in a substantial depletion. This study introduces an innovative approach for synthesizing Ti 3 C 2 T x MXene/Ni/C composites with tunable interlayer spacing, showing their potential for applications in microwave absorption (MA).
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Chengbin Liu,Sibei Hao,Xiaoyan Chen,Boyang Zong,Shun Mao
MXenes, a group of emerging two-dimensional (2D) transition metal carbides or nitrides, have attracted wide interest due to their unique structures and properties. Their stability and applicability in different media especially in an alkaline environment are directly associated with their potential applications and are not yet explored. Herein, a field-effect transistor (FET) is fabricated with single/double-layer Ti3C2Tx MXene. The Ti3C2Tx FET indicator shows a fast (∼1 s), sensitive, and selective response to alkali. Moreover, the device can work even in a high-salinity (2 M NaCl) environment, suggesting its high anti-interference ability for alkali in a high-ionic-strength environment. Using an in situ morphological image evolution study, it is demonstrated that the response signal results from alkali-induced denaturation of Ti3C2Tx nanosheets. The Ti3C2Tx-based alkali FET indicator and systematic evaluation on alkali-induced structure evolution of Ti3C2Tx provide essential insights into MXene-based FETs and future applications of MXene in alkaline environments.
研究领域:
材料科学
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电子器件
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化学
✓ 已验证
DOI
高影响因子
ACS Omega
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2024
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IF 3.7
Huiqin Li
Soft electro-ionic actuators have received extensive research and attention due to their advantages such as low voltage response and adjustable deformation. However, they have not been able to enter the actual industry application like traditional rigid actuators; one of the reasons may be that the kinematic properties of actuators have been less studied. The electro-ionic actuator based on Ti3C2Tx MXene-CNT/PPy electrode prepared in this paper shows good bending displacement (18.8 mm) and strain (0.63%) under 4 V voltage. In this article, the overlapping nature and exponential function relationship of the actuator end-point trajectories are preliminarily discussed, and the morphology change and cubic polynomial function relationship of the actuator body are considered. Moreover, in application, a novel proof-of-concept model of smart wearable finger straps is proposed. This study is a unique attempt and is hoped to provide a new research perspective in the field of soft electro-ionic actuators.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2022
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IF 8.431
Dan Zhou,Mengmeng Liang,Xingyue Bao,Tiezhu Sun,Yi Huang
Soil colloid is a nonnegligible factor when evaluating the environmental risk of engineered nanoparticles (ENPs) in the groundwater. In this study, the environmental fate of an emerging ENP (Ti 3 C 2 T x MXene) in the groundwater was investigated for the first time, which currently poses a severe environmental risk due to its cytotoxicity but has received little attention. The colloidal dispersion stability and degradation kinetics of Ti 3 C 2 T x MXene in the groundwater were evaluated by considering the effects of soil colloids prepared from sodium humate (SH), montmorillonite (MT), and a natural soil (NS) under variable solution chemistry. The results showed that the affinity of soil colloids with Ti 3 C 2 T x followed an SH > MT > NS sequence. Increasing SH concentration led to Ti 3 C 2 T x disaggregation by enhancing the electrical and steric repulsive forces, while MT and NS resulted in hetero-aggregation because of the elevated collision frequency. SH and MT enhanced the critical coagulation concentrations of Ti 3 C 2 T x by 100 and 10 folders, respectively, via surface coating process, while NS slightly reduced due to the bridging effects induced by the soluble cations. The soil colloids promoted Ti 3 C 2 T x degradation compared with their absence and in an SH > MT ≫ NS sequence. SH and MT were through forming Ti–O–C and Si–O–Ti bonds with Ti 3 C 2 T x via their carboxyl and hydroxyl groups, respectively, rendering the Ti 3 C 2 T x surface more reactive and faster degradation. NS showed a weak promotion effect because of its less affinity with Ti 3 C 2 T x and limited organic matter and clay contents with hydroxyl and carboxyl groups . This study demonstrated the unstable environmental behaviors of Ti 3 C 2 T x in the groundwater and mitigated its environmental risk concerns.
研究领域:
环境科学
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纳米技术
✓ 已验证
DOI
PubMed
高影响因子
LANGMUIR
·
2025
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IF 3.9
Longhui Dai,Huimin Yu,Yunkai Wang,Xuyang Zhang,Fang Xu,Xiaofang Pan,Jing-Ting Luo,Aihua Zhong
MXenes have attracted tremendous attention in electromagnetic interference shielding, energy storage, and gas and humidity detections because of their ultralarge surface area and abundant functional groups. However, their poor stability against hydration and oxidation makes them challenging for long-term storage and applications. Herein, we proposed and demonstrated a Ti3C2Tx MXene composite-based humidity sensor, of which the stability is pronouncedly enhanced by introducing an O2 adsorption competitor of extracted bentonite (EB). All the results of TEM, XPS, and Raman spectroscopy show that the oxidation of the Ti3C2Tx MXene is significantly suppressed by the introduction of EB. Its excellent performance in humidity detection further confirms the effectiveness of EB in improving the stability. An ultrahigh response value of 6400% and an ultrafast response time of 1 s at 85% RH are observed, suggesting promising prospects for superior humidity detection of the Ti3C2Tx MXene composite. Furthermore, its feasibility for flexible humidity detection was also examined on a PET substrate, which exhibited high flexibility and excellent discrimination in speaking words.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
iScience
·
2023
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IF 5.8
Guohong Wang,Minghang Li,Jianxi Liu,Fang Ye,Laifei Cheng,Xiaomeng Fan,Xingmin Liu,Ralf Riedel
MXenes have been proven to be outstanding lossy phase of advanced electromagnetic interference (EMI) shielding materials. However, their poor tolerance to oxygen and water results in fast degradation of the pristine two-dimensional (2D) nanostructure and fading of the functional performance. Herein, in this research, natural antioxidants (e.g., melatonin, tea polyphenols, and phytic acid) were employed to protect the Ti 3 C 2 T x MXene from its degradation in order to achieve a long-term stability of the EMI shielding performance. The results showed that the synthesized composites comprised of antioxidants and Ti 3 C 2 T x exhibited a decelerating degradation rate resulting in an improved EMI shielding effective (SE) stability. The antioxidation mechanism of the applied antioxidants is discussed with respect to the nanostructure evolution of the Ti 3 C 2 T x MXene. This work contributes to the basic foundations for the further development of advanced MXenes for stable applications in the EM field.
研究领域:
材料科学
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电磁学
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化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Ying Liu,Yubo Zhao,Changtu Ma,Min Zhao,Huayun Du,Yang Ge,Jianlong Ji,Kexun Li,Yanxia Wu
Ti 3 C 2 T x MXene has been regarded as a promising candidate for advanced microwave absorption materials. However, the microwave absorbing performance of Ti 3 C 2 T x MXene is suppressed by the single dielectric loss mechanism and impedance mismatch because of the high conductivity. To effectuate a good absorption capability of Ti 3 C 2 T x MXene, this paper constructs a heterostructured Co/Ti 3 C 2 T x hybrid by atomic layer deposition of magnetic Co nanoparticles on Ti 3 C 2 T x nanosheets . The microstructures, magnetism , and microwave absorption behaviors of the Co/Ti 3 C 2 T x hybrids are investigated systematically. The results show that the frequency-dependent electromagnetic parameters of the Ti 3 C 2 T x MXene become tunable by controlling the content of Co decorations, which are conducive to both magnetic loss and impedance matching . The Co/Ti 3 C 2 T x hybrid with ultralow Co decoration content (only 1.52 wt%) achieves the minimum reflect loss of −54.32 dB at a thin matched thickness of 1.29 mm, and the corresponding effective absorption bandwidth with reflection loss below −10 dB reaches 4.29 GHz. The atomic layer deposited magnetic metal nanostructures provides an effective strategy for preparing MXene-based hybrids which not only have high absorption efficiency but also significantly reduce the use of magnetic metals.
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
危险品化学品经营许可证（带存储）