DESALINATION
·
2026
·
IF 9.9
Markos Medhin Ashebo,Zixiao Xu,Haolan Shi,Huancheng Dong,Ningning Liu,Fei Yu,Jie Ma
1D Nb 2 O 5 nanorods grown in situ uniformly on the surface 2D Nb 2 C MXene. • Nb 2 O 5 nanorods act as passivation layers, mitigating MXene restacking and oxidation. • Interfacial charge transfer between Nb 2 O 5 and Nb 2 C accelerates electron kinetics. • The Nb 2 O 5 -Nb 2 C hybrid exhibits excellent desalination performance and cycling stability. Self-stacking and oxidative instability limit the ion accessibility and cycling stability of MXene electrodes in capacitive deionization (CDI). To address these limitations, a controlled partial derivation strategy was used to construct Nb 2 O 5 nanorods on Nb 2 CT x MXene nanosheets, forming 1D Nb 2 O 5 nanorod/2D Nb 2 C heterostructure. The derived Nb 2 O 5 nanorods increased the accessible surface area, provided expanded ion intercalation channels, suppressed Nb 2 CT x restacking, and also acted as a partial passivation layer to inhibit further MXene oxidation. Electrochemical measurements showed that the Nb 2 O 5 -Nb 2 C electrode exhibited higher capacitance and lower charge-transfer resistance than pristine Nb 2 C, suggesting improved interfacial charge transfer behavior and ion storage kinetics. The Nb 2 O 5 -Nb 2 C hybrid delivered a salt adsorption capacity (SAC) of 51.2 mg g −1 at 1.6 V, an average salt removal rate (SAR) of 1.7 mg g −1 min −1 , and retained 90.5% of its initial capacity after 200 cycles. These results indicate that controlled partial oxidation can not only mitigates the instability of Nb 2 C, but also improves ion accessibility, electrochemical kinetics, and cycling durability of Nb-based MXene electrodes for CDI. Download: Download high-res image (360KB) Download: Download full-size image
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Wenkang Xu,Xiaoyao Li,Chao Peng,Guangxing Yang,Yonghai Cao,Hongjuan Wang,Feng Peng,Hao Yu
MXenes, 2D transition metal carbides/nitrides, have been demonstrated as promising platform for fabricating novel composites with interesting photo-/electrochemical properties. It is desirable to gain insights into the reactivity of MXenes, enabling the controllable transformation of MXenes. Here, a one-pot hydrothermal synthesis method of MXene-based photocatalyst is validated by harnessing the reducibility of Nb 2 CT x MXene . The origin of reducibility of Nb 2 CT x during the hydrothermal oxidation process was demonstrated as the active hydrogen produced from the water splitting in the presence of Nb 2 CT x , which reduced Ru 3+ in situ to Ru nanoparticles on Nb 2 O 5 nanowires derived from Nb 2 CT x . Compared with the traditional photo-deposition method, the chemical valance of the noble metal Ru/Pt obtained by the one-pot synthesis method was closer to the metal state, which reduced the charge transfer resistance by 82.5%. It led to the photocatalytic hydrogen production of 10.11 mmol·h −1 ·g −1 with 41.25% apparent quantum yield at 313 nm.
研究领域:
材料科学
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光催化
·
能量转换
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纳米材料
·
氢气生产
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DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Yongfeng Chen,Geoffrey I.N. Waterhouse,Xuguang Qiao,Yufeng Sun,Zhixiang Xu
An electrochemical sensor based on stearyl trimethyl ammonium bromide - functionalized niobium carbide@multi-walled carbon nanotubes (Nb 2 C@MWCNTs-STAB) for signal amplification was successfully constructed for sensitive detection of nitrite (NO 2 − ). Niobium carbide@multi-walled carbon nanotubes (Nb 2 C@MWCNTs) with high electrical conductivity and water dispersibility were first prepared in a one-pot hydrothermal synthesis, after which cationic STAB was added to overcome the negative surface charge on the Nb 2 C@MWCNTs. The electrostatic attraction between Nb 2 C@MWCNTs-STAB and NO 2 − was improved by the STAB , which enhanced the sensitivity of the constructed sensor for NO 2 − . Under optimized conditions, Nb 2 C@MWCNTs-STAB/GCE exhibited excellent analytical performance for detection NO 2 − with two wide liner ranges (0.1–100 μmol L −1 and 100–2000 μmol L −1 ) and a limit of detection of 0.022 μmol L −1 . Nitrite recovery tests in milk and spinach samples showed recoveries in the range of 89.82–104.52%. The NO 2 − residues in ham and pickled vegetable (cedrela sinensis) samples were analysed using the presented sensor and a spectrophotometric method, with no significant difference found between the results of the two methods.
研究领域:
分析化学
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材料科学
·
环境科学
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DOI
高影响因子
SENSORS
·
2026
·Vol. 26
·期 11
·3450
·
IF 4
Baohui Zhang,Haoyu Zhou,Xiaowu Zhu,Haoxiang Chen,Yang Yang
High-performance ethanol sensors with low power consumption show critical applications in environmental monitoring, personal health diagnosis, industry and traffic safety. Herein, MoO3/Nb2C MXene heterojunction gas-sensing materials were constructed via a one-step hydrothermal method for MoO3nanotube synthesis. The dominant facets of MoO3were shifted from the (040) orientation in MoO3nanotubes to the (110) and (021) orientations in the MoO3/Nb2C MXene composite. Nb2C nanosheets provide a large number of crystallization sites, preventing the growth of MoO3nanotubes during synthesis, inducing a strategic facet release. The sensing performance shows MoO3/Nb2C MXene composite reduces the operating temperature down to 120 °C. The 15 wt% Nb2C MXene-precursor-mixed MoO3sensor exhibits an enhanced response of 6.1 toward 100 ppm ethanol, which is higher than that of pristine MoO3nanotubes at 120 °C, with response and recovery times of 19 s and 72 s, respectively. The sensors show high selectivity toward ethanol over other VOC gases and good long-term stability over 30 days. This work confirms that crystal engineering is an effective method for reducing operating temperature and enhancing gas-sensing performance, and the sensor shows potential application for ethanol sensing.
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DOI
PubMed
高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-17
·
IF 16.419
Peng Yusi,Lin Chenglong,Long Li,Masaki Tanemura,Tang Mao,Yang Lili,Liu Jianjun,Huang Zhengren,Li Zhiyuan,Luo Xiaoying,Lombardi John R.,Yang Yong
Nb 2 C and Ta 2 C MXenes exhibit remarkable SERS performance with the enhancement factors of 3.0 × 10 6 and 1.4 × 10 6 , which is synergistically enabled by the PICT resonance enhancement and electromagnetic enhancement.
The excellent SERS sensitivity endows Ta 2 C MXene with the capability to sensitively detect and accurately identify the SARS-CoV-2 spike protein, which is beneficial to achieve real-time monitoring and early warning of novel coronavirus.
研究领域:
材料科学
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纳米技术
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分析化学
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病毒学
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL LETTERS
·
2025
·
IF 1.8
Denghao Li,Changqing Huang,Bo Yu,Dingyu Cui,Jiali Liu,Li Jiang
Polyvinyl alcohol (PVA)/Nb2C/Ag flexible SERS substrate was prepared by coating AgNPs in situ reduced by Nb2C on the surface of PVA. Sensitive SERS detection was achieved by adjusting the concentration of AgNO3, enabling the detection of 4-MBA with good homogeneity and reproducibility. The pesticide residues of phosmet on the surfaces of apples were detected by a simple wiping method with the flexible substrate. The detection range was 0.5 – 100 ppm, which met the detection standard of phosmet for fruits. The PVA/Nb2C/Ag flexible SERS substrate has the potential for convenient, rapid, and sensitive detection of pesticide residues on fruit surfaces.
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Mi Liu,Weidan Zhao,Denghao Li,Dingyu Cui,Jiali Liu,Qingao Chen,Yan Zhou,Li Jiang,Huaibin Zhou
Infected wound healing remains a significant clinical challenge due to bacterial resistance and excessive inflammation. Herein, a multifunctional hydrogel dressing (Nb2C-Arg/Gel) is developed that integrates two-dimensional Nb2C nanosheets (photothermal agent) and arginine [nitric oxide (NO) donor] into a calcium ion cross-linked sodium alginate matrix. The hydrogel has a relatively high swelling capacity and good ability to scavenge reactive oxygen species (ROS), which are beneficial for absorbing wound exudate and reducing the inflammatory response of wounds. Under irradiation with a low-power NIR-II laser (1064 nm, 1 W cm–2), Nb2C-Arg/Gel achieves rapid photothermal heating (48.6 °C in 1 min), while thermally enhances arginine decomposition-triggered on-demand NO release. This synergistic mechanism provides superior antimicrobial efficacy against Staphylococcus aureus (97.65%) and methicillin-resistant S. aureus (90.05%). In vivo studies on MRSA-infected murine wounds demonstrate that the residual area on day 10 was 2.9%, which accelerated healing compared to that of the control group (17.8%), accompanied by reduced inflammation and enhanced angiogenesis. The excellent biocompatibility of hydrogel is validated by low hemolysis (<5%) and promoted fibroblast proliferation (125% cell viability). Combining with photothermal, NO-mediated antibacterial action, and ROS scavenging to alleviate oxidative stress, this antibiotic-free hydrogel dressing has great potential for clinical application for the treatment of refractory-infected wounds.
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产品关联
DOI
PubMed
高影响因子
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