JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Xunxin Chen,Meishan Li,Juan Hou,Ke Lu,Xuanyu Yue,Yafei Li,Long Chen,Zhiyong Liu,Xiaodong Yang
Nitrogen-doped Ti 3 C 2 T y MXene with multivalent cobalt and oxygen vacancy (Vo) modification was obtained by using molten salt method and greatly improved electrocatalytic performance. The structural properties of MXene and the valence state of cobalt were adjusted by controlling the molten salt temperature. When the molten salt treatment temperature was 377 °C, the obtained 377-CoO x N 1-x -Ti 3 C 2 T y maintained the chemical structure of MXene well, and also has high Co 2+ content and Vo content. Electrochemical test results showed that 377-CoO x N 1-x -Ti 3 C 2 T y had the lowest Hydrogen Evolution Reaction (HER) overpotential of 87.73 mV and good electrocatalytic stability. X-ray Photoelectron Spectroscopy (XPS) results and Density Functional Theory (DFT) calculations showed that the introduction of polyvalent cobalt and Vo in the nitrogen-doped Ti 3 C 2 T y structure effectively reduced the energy barrier of the electrocatalytic reaction of MXene.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
SENSORS
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2025
·Vol. 25
·期 8
·2508
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IF 3.5
Hanxue Yang,Chao Rong,Shundong Ge,Tao Wang,Bowei Zhang,Fu-Zhen Xuan
HighlightsWhat are the main findings?3D crumpled MXene with strain wrinkles enhances conductivity and prevents restacking.Cu nanoclusters (3.0 wt%) synergize N-doping for noble metal-like catalytic activity.What is the implication of the main finding?Ultrasensitive dual-analyte non-enzymatic detection of DA/UA with anti-interference capability and rapid response.Novel material design strategies provide new approaches for the development of future high-performance sensors.Simultaneous detection of dopamine (DA) and uric acid (UA) is essential for diagnosing neurological and metabolic diseases but hindered by overlapping electrochemical signals. We present an ultrasensitive electrochemical sensor using copper nanoclusters anchored on nitrogen-doped crumpled Ti3C2TxMXene (Cu-N/Ti3C2Tx). The engineered 3D crumpled architecture prevents MXene restacking, exposes active sites, and enhances ion transport, while Cu nanoclusters boost electrocatalytic activity via accelerated electron transfer. Structural analyses confirm uniform Cu dispersion (3.0 wt%), Ti-N bonding, and strain-induced wrinkles, synergistically improving conductivity. The sensor achieves exceptional sensitivity (1958.3 and 1152.7 μA·mM−1·cm−2for DA/UA), ultralow detection limits (0.058 and 0.099 μM for DA/UA), rapid response (<1.5 s), and interference resistance (e.g., ascorbic acid). Differential pulse voltammetry enables independent linear detection ranges (DA: 2–60 μM; UA: 5–100 μM) in biofluids, with 94.4% stability retention over 7 days. The designed sensor exhibits excellent capabilities for DA and UA detection. This work provides a novel design strategy for developing high-performance electrochemical sensors.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
CARBON
·
2024
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IF 10.5
Yunzhongze Hu,Yang Zhang,Saihua Li,Gongyu Liu,Xiaosu Yi,Xiaoling Liu
The application of carbon fiber reinforced plastics (CFRPs) in various industries significantly increased the need for sustainable recycling of carbon fiber (CF) to enhance economic efficiency. In this study, we prepared lightweight multifunctional flame-retardant Ti 3 CNT x /Ammonium Polyphosphate (APP)/Polyethyleneimine (PEI)/reclaimed carbon fiber (MArCF) nonwoven veils with superior Electro-Magnetic Interference (EMI) shielding effectiveness (SE) using a combination of multiple vacuum-assisted filtration, improved etching, and delamination strategies, followed by annealing treatments. The resulting MArCF nonwoven veils exhibited an impressive EMI SE of a maximum of 72.65 dB, with a SSE/t value reaching 10730 dB cm 2 g −1 . Moreover, the MArCF nonwoven veil demonstrated excellent flame retardance properties, with a substantial decrease of 63 % in Heat Release (HR) capacity, 60 % in Total Heat Release (THR), and 83.15 % in Heat Release Rate (HRR). The modified veils also exhibited excellent Joule heating and photothermal properties, indicating a promising potential for multifunctional reinforcement in composites.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lei Cai,Fei Pan,Xiaojie Zhu,Yanyan Dong,Yuyang Shi,Zhen Xiang,Jie Cheng,Haojie Jiang,Zhong Shi,Wei Lu
Exploring high-performance microwave absorbing materials with lightweight, thin thickness and strong electromagnetic wave (EMW) absorption capability is an essential way to solve EMW pollution problems. Herein, layered N-doped MXene (Ti 3 CNT x ) flakes and hollow Co-ZIF particles (HCF) hybrids were successfully fabricated using the controllable cooperative protection etching strategy and the electrostatic self-assembly technology . Remarkably, the microwave absorption hybrids achieved ultrathin (1.43 mm), and strong EMW absorption ability (reflection loss of −55.02 dB) with a rather low filler loading, which is superior to the magnetic–dielectric hybrids with similar components reported in the literatures. The synergistic effect generated by the improvement of dielectric loss , magnetic loss and interface polarization could effectively integrate with the impedance matching to improve the attenuation ability of EMW. Therefore, this simple assembly and etching strategy opens a new platform for designing hollow and layered materials and broadens the desirable candidates for lightweight and high-efficient microwave absorbers.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Dan Liao,Zhenhua Liu,Runmin Huang,Jingang Yu,Xinyu Jiang
A novel MXene/MOF derivative N-Ti 3 C 2 /PC composite was successfully synthesized through in-situ nucleation and conversion of ZIF-8 on 2D hierarchical Ti 3 C 2 MXene nanosheets. Due to the insertion of ZIF-8, the restacking of Ti 3 C 2 nanosheets was effectively avoided, thus its electrochemical properties was significantly improved. The obtained N-Ti 3 C 2 /PC composite was constructed for the detection of 4-aminophenol (4-AP) and acetaminophen (ACOP) simultaneously. The results showed that the as-fabricated electrochemical sensor owned excellent electrocatalytic activity for 4-AP and ACOP, which was attributed to the synergistic effect of N-Ti 3 C 2 and PC that accelerating the electron transfer on the electrode surface. Under optimum experimental conditions, the linear detection range was 1–150 μM for 4-AP and ACOP. The detection limits (LODs) for 4-AP and ACOP were evaluated to be 0.059 μM and 0.050 μM (signal-to-noise ratios, S/N = 3) respectively. Furthermore, the N-Ti 3 C 2 /PC electrochemical sensor was employed to determine 4-AP and ACOP in industrial wastewater and paracetamol tablets, and satisfying recoveries were obtained. Consequently, the N-Ti 3 C 2 /PC composite is expected to have a wide range of applications in electrochemical for detecting of environmental pollutants.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
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2023
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IF 8.8
Jinwen Yang,Linlin Chen,Jie Qi,Feili Luo,Lin Li,Honghong Wu,Feifei Cao,Jiangjiang Gu
A novel fluorescence “off-on-off” probe was presented to detect Zn(II) and oxalic acid (OA) based on nitrogen-doped MXene quantum dots ( N -MQDs), which were synthesized by an ultrasound approach at room temperature with nitric acid and ethylenediamine. These N -MQDs displayed small size (<10 nm), water dispersibility, and good photoluminescence. Furthermore, the N -MQDs showed an selective response towards Zn(II) through fluorescence enhancement, with a limit of detection (LOD) calculated as 0.127 μM in the linear range of 0–20 μM. Then, the fluorescence of N -MQDs/Zn(II) system could be selectively quenched after adding OA, with an effective response in the range from 0 to 20 μM (LOD: 0.883 μM). The fluorescence “turn-on” and “turn-off” properties of N -MQDs were resulted from the intramolecular charge transfer (ICT) of Zn(II) and the coordination between OA and Zn(II), respectively. This sensing platform was successfully applied for Zn(II) and OA detection in actual environmental and vegetable samples.
研究领域:
分析化学
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环境科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yueer Ma,Zhao Zhang,Wei Chen,Qianlin Zhang,Shuai Chang,Mei Pan,Xingqiang Lv,Hui Chang
A novel synthetic strategy is proposed to create high zero-valent platinum (Pt) components, sub-nanometer Pt clusters, and three-dimensional (3D) Pt/ nitrogen-doped MXene (N-Ti 3 C 2 T x ) catalyst through electrostatic self-assembly combined with non-in-situ doping pyrolysis. Compared with the primary Pt/Ti 3 C 2 T x , the N-doped Pt/N-Ti 3 C 2 T x , which has a 3D wrinkled porous structure, increases the residence time of methylcyclohexane (MCH) on the catalyst surface during gas–solid reactions and improves the mass transfer efficiency of MCH. In addition, the N-doped Pt/N-Ti 3 C 2 T x , which optimizes the electronic coordination environment, produces sub-nanometer Pt clusters, in which Pt mainly exists as Pt (0) (80.78 %) and avoids the presence of low catalytic activity Pt (IV). The Pt 0.5% /N-MXene catalyst exhibits significant catalytic performance in the dehydrogenation of MCH in a fixed-bed reactor, with a hydrogen evolution rate of 636.30 mmol·g Pt -1 ·min - 1 , which significantly surpasses 176.60 mmol·g Pt -1 ·min - 1 for N-undoped Pt 1% /MXene and 78.13 mmol·g Pt -1 ·min - 1 for commercial Pt 1% /TiO 2 . Density functional theory calculations, Pt/N-Ti 3 C 2 T x exhibits lower Pt electronic states and has a d -band center closer to the Fermi level than Pt/Ti 3 C 2 T x . This configuration leads to the stronger MCH adsorption on the Pt sites of Pt/N-Ti 3 C 2 T x , promoting faster H 2 generation and release, thereby achieving a higher catalytic activity.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Science Bulletin
·
2024
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IF 18.8
Chuanliang Wei,Zhengran Wang,Peng Wang,Xinlu Zhang,Xuguang An,Jinkui Feng,Baojuan Xi,Shenglin Xiong
The practical application of lithium–sulfur (Li–S) batteries is inhibited by the shuttle effect of lithium polysulfides (LiPSs) and slow polysulfide redox kinetics on the S cathode as well as the uncontrollable growth of dendrites on the Li metal anode . Therefore, both cathode and anode sides must be considered when modifying Li−S batteries. Herein, two-dimensional (2D) ultrathin CoSe 2 nanobelts are in situ grown on 2D N-doped MXene nanosheets (CoSe 2 @N-MXene) via one-step solvothermal process for the first time. Owing to its unique 2D/2D structure, CoSe 2 @N-MXene can be processed to crumpled nanosheets by freeze-drying and flexible and freestanding films by vacuum filtration. These crumpled CoSe 2 @N-MXene nanosheets with abundant active sites and inner spaces can act as S hosts to accelerate polysulfide redox kinetics and suppress the shuttle effect of LiPSs owing to their strong adsorption ability and catalytic conversion effect with LiPSs. Meanwhile, the CoSe 2 @N-MXene film (CoSe 2 @NMF) can act as a current collector to promote uniform Li deposition because it contains lithiophilic CoSe 2 and N sites. Under the systematic effect of CoSe 2 @N-MXene on S cathode and Li metal anode, the electrochemical and safety performance of Li–S batteries are improved. CoSe 2 @NMF also shows excellent storage performances in flexible energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Huanqing Pei,Yingying He,Yuxuan Chen,Mingmin Lin,Yulai Zhao,Linxi Hou
In this work, we successfully fabricated high-performance bacterial cellulose-polyaniline/nitrogen-doped MXene (BC-PANI/N-MXene) composite membrane electrodes. Utilizing a controlled freeze polymerization technique, polyaniline (PANI) was controllably and orderly grown within and on the surface of the bacterial cellulose (BC) nanofiber network, forming a unique three-dimensional (3D) interconnected, flower-like nanostructured conductive scaffold. Vacuum-assisted self-assembly then enabled uniform deposition and firm anchoring of highly nitrogen-doped MXene nanosheets onto the BC-PANI scaffold, yielding an integrated BC-PANI/N-MXene composite membrane. This approach effectively circumvented uncontrolled agglomeration or structural damage typically encountered during direct mixing of MXene and PANI, achieving stable and ordered integration of the two high-activity materials. The morphological structure and electrochemical performance of the as-prepared BC-PANI/N-MXene composite membranes were comprehensively characterized and evaluated. As the mass fraction of N-MXene in the BC-PANI/N-MXene composite electrode increases, the specific capacitance first increases and then decreases. The optimized composite membrane, BC-PANI/N-MXene (3%), exhibited an excellent specific capacitance of 5525 mF/cm2 (635 F/g) at a current density of 5 mA/cm2. Even at a higher current density of 20 mA/cm2, it retained 61% of its initial capacitance, indicating its promising potential application in energy storage. This study provides a strategy for enhancing the electrochemical efficiency of PANI-based energy storage materials.
研究领域:
材料科学
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纳米科技
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电化学
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能源存储
·
高分子科学
✓ 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）