Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
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IF 15.7
Liu Minmin,Yang Liting,Wu Zhengchen,Chen Guanyu,Wang Xiangyu,Yang Xiaofen,Liang Guisheng,Che Renchao
Periodically atomic displacement in two-dimensional (2D) ripple texturing offers a promising route for selective modulation of local potential, crucial for advanced electronic engineering. However, in 2D transition metal carbonitrides (MXenes), the construction and regulation of atomic ripples to control electronic properties meet substantial challenges due to the difficulty in tailoring homogeneous deformation. Here, we propose a competition strategy that leverages configurational entropy and surface termination to controllably modulate the atomic ripple structure within Nb 2 CTe x -based Mxenes. This chemical disorder releases the local in-plane strain induced by termination atoms with large ionic radii, thus enabling the regulation of out-of-plane atomic displacement. The deliberate design of the ripple structure regulates the dielectric relaxation time of the microscopic dipole in the electric field. Consequently, high-entropy MXenes deliver strong intensity of microwave absorption (−41.12 dB) and an absorption bandwidth of nearly 10 GHz, covering the S-, C-, and X-bands. This study establishes the relationship between atomic ripple structure, atomic strain, polarization relaxation, and dielectric properties, providing guidance for designing advanced MXenes materials for various applications.
研究领域:
材料科学
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纳米技术
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凝聚态物理
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电磁工程
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表面科学
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PubMed
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
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能量转换
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纳米材料
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氢气生产
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guanglu Xia,Jianhao Qiu,Shengwang Gong,Dingliang Dai,Biyao Fang,Yixin Li,Jianfeng Yao
Specific intermolecular interactions are the keys to constructing benign interfacial compatibility, which determines the activities of hybrid photocatalysts. In this study, CdS/TpPa-Cl 2 /MXene hybrids were compactly developed through the mediation of chlorine groups in TpPa-Cl 2 with MXenes and CdS. Owing to the formation of the Schottky junction between TpPa-Cl 2 and MXene and the heterojunction between TpPa-Cl 2 and CdS, as well as the close interfacial contacts among them, the photogenerated electron–hole pairs are effectively separated, which ultimately results in efficient photocatalytic activities. For visible-light-driven H 2 O 2 production in ambient air and pure water, CdS/TpPa-Cl 2 /MXene hybrids could achieve a high H 2 O 2 yield of 1005 μmol·L –1 , which is 2.5, 9.7 and 6.5 times greater than those of pure TpPa-Cl 2 , MXene and CdS, respectively. The mechanism investigation revealed that an indirect O 2 reduction pathway with ·O 2 – as an intermediate occurred for H 2 O 2 production over the CdS/TpPa-Cl 2 /MXene composites, and this two-electron O 2 reduction process was manifested as the primary way. This study provides insight into the construction of multi-component composite photocatalysts with high efficiency on the basis of covalent organic frameworks.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Fangxian Wang,Junwei Yang,Shihao Li,Junwen Liang,Yuwei Wang,Rong Du,Bo Zhou,Qiong Liu,Changping Li
Bromate is a commonly identified carcinogenic and genotoxic disinfection byproduct in water. Electrochemical debromination is an environmentally friendly and effective approach but it often suffers the limited reducing atomic H (H*) ability and high metal catalyst dosage. In this study, a unique composite catalyst comprised of ultra-low loading Cu single atoms (0.016 wt%) and Fe 2 O 3 nanoparticles supported on a Nb 2 C MXene (denoted as Cu 0.2 /Fe 0.1 /Nb 2 C) was synthesized by one-step high-temperature molten salt method. The Cu 0.2 /Fe 0.1 /Nb 2 C significantly outperformed the Nb 2 C, Cu 0.2 /Nb 2 C and Fe 0.1 /Nb 2 C counterparts in the electrochemical debromination with a 94.2 % removal efficiency of bromate. It is revealed that the introducing of Cu single atoms, efficiently promotes the adsorption of H* and inhibition of competitive H 2 evolution. The incorporation of Fe 2 O 3 nanoparticles significantly increased the electronic metal-support interaction effect between the metal components and Nb 2 C, thereby forming a noticeable electronic cloud bridge to facilitate efficient charge transfer. Ultimately, the synergistic interplay between Cu single atoms and Fe 2 O 3 nanoparticles plays a crucial role in achieving the remarkable removal performance of bromate. This work not only presents a significant instance of a synergistic catalyst involving metal single atoms and metal nanoparticles for effective electrochemical debromination but also advances the understanding of the electronic metal-support interaction.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
ANALYTICAL LETTERS
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2022
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IF 2.267
Xing Wu,Rongbin Kang,Yiyuan Zhang,Weiming Li,Tao Zhang
The concentration of alkaline phosphatase (ALP) in serum is an important biomarker for human health, thus the development of a simple method for its determination is important. In this work, the gold nanoparticles/Ti3C2Tx (Au/Ti3C2Tx) MXenes nanohybrids were prepared via a simple self-reduction step and introduced as the sensing platform to immobilize ALP antibodies. Meanwhile, because ALP dephosphorylates 4-amino phenyl phosphate to produce electroactive 4-aminophenol (AP), a simple labeled-free immunosensor was constructed for ALP by recording the differential pulse voltammetry signal of AP. The detection conditions were optimized and the analytical performance was evaluated. Under the optimized conditions, a wide linear range (10.0 to 1500 U L−1) and low detection limit for ALP (4.0 U L−1) were achieved. Furthermore, the selectivity, stability and reproducibility of the immunosensor were investigated, demonstrating desirable results. The results show that the proposed immunosensor has potential applications for practical ALP determination.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 44
·17045-17065
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IF 4.5
Fan Qingwen,Song Chaoyun,Zhang Yuchun,Ren Gangxin,Sun Yongmei,Fu Peng
The development of new materials for electromagnetic wave absorption and energy storage has gained significant attention due to their widespread applications. This study introduces a novel approach to address the stacking issue of MXenes and enhance the electromagnetic shielding capabilities of porous carbon by combining them with jujube shell porous carbon. This composite material exhibits outstanding electromagnetic shielding properties and electrochemical energy storage performance. The addition of polar acetone enhances the interfacial interaction between the carbon matrix and Ti 3 C 2 Tx, resulting in a remarkable return loss of − 36.1 dB for AJSPC&Ti-A, signifying the absorption of 99.9% of incident electromagnetic waves. The three-dimensional (3D) porosity and two-dimensional (2D) laminar structure of the composite prolong the propagation of electromagnetic waves, leading to multiple reflection and scattering effects. Furthermore, the 3D porous structure provides abundant channels and active sites for the storage and transport of electrolyte ions. In electrochemical testing, AJSPC&Ti-A achieves a specific capacity of 156.1 F/g at 1 M Na 2 SO 4 and 0.5 A/g, surpassing the performance of alkaline electrolytes. In a symmetrical capacitor configuration, this composite demonstrates an energy density of 8.4 Wh/kg, accompanied by a power density of 193.0 W/kg. Density functional theory analysis reveals changes in the interface between porous carbon and Ti 3 C 2 Tx, attributed to electronegativity differences and increased spin density. These alterations manifest in the redistribution of charge density and uneven electron distribution. Additionally, the s and d orbitals contribute to the enhancement of density of states, promoting multiple polarization relaxation and charge transfer in AJSPC&Ti-A. This research introduces a new class of composites that exhibit dual functionality, offering efficient electromagnetic shielding and excellent electrochemical energy storage capabilities. Graphical Abstract
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高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 189
·期 1
·1-9
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IF 5.833
Pei Ting,He Yu,Wang Yaping,Song Gongwu
Ti 3 C 2 MQDs were synthesized using an effective fluorine-free method with excitation/emission maxima at 390/490 nm and a fluorescence quantum yield of 11.78%. In contrast to the traditional, hazardous, and time-consuming process of HF pretreatment, our fluorine-free method is safe and simple. Acetylcholinesterase (AChE) could catalyze the hydrolysis of acetylthiocholine (ATCh) to produce thiocholine which was further reacted with Ehrman’s reagent and decomposed to form a yellow product 2-nitro-5-thiobenate anion (TNB). Due to the obvious overlap between the excitation spectrum of Ti 3 C 2 MQDs and the absorption spectrum of TNB, AChE catalyzed the hydrolysis of substrate DTNB/ATCh to form TNB, which can effectively quench the fluorescence of Ti 3 C 2 MQDs through the inner filter effect (IFE). However, the presence of organophosphorus (OPs) inhibited the activity of AChE, leading to a less expressed IFE and increasing recovery of fluorescence. This was used for the quantification of OPs with a detection limit of 0.20 μg·L −1 . Moreover, with the constant increase of AChE activity, the color of the reaction system changed visibly from colorless to yellow, and then from yellow to colorless with further continuous addition of OPs. A colorimetric detection with a paper-based sensor of AChE activity and OP concentration was also fabricated by analyzing changes in RGB value using a smartphone APP. In this work, we proposed an effective fluorescence/colorimetric two-mode detection method, which opened a new horizon to detect other targets. Graphical abstract
研究领域:
材料科学
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分析化学
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环境科学
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生物技术
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Jianian Chen,Mingyu Chu,Fenglei Lyu,Jin Gong,Linzhong Wu,Lijia Liu,Yong Xu,Qiao Zhang
Two-dimensional (2D) metal carbides, carbonitrides, and nitrides (MXenes) have recently emerged as promising candidates in catalysis due to their unique properties. In this work, we composited Ti3C2 with Co-embedded N-doped carbon nanotubes (CNTs) via the pyrolysis of zeolitic imidazolate frameworks (ZIF-67) for propyne selective hydrogenation. Detailed characterizations show that strong synergistic effects are observed between the Ti3C2 and Co-embedded N-doped CNTs in the composite catalysts. This work provides an efficient strategy to achieve N-doping on Co nanoparticles, which play a vital role in the propyne selective hydrogenation. The optimized catalyst gives a high propyne conversion (∼99%) and high propene selectivity (∼96%) on propyne selective hydrogenation at 150 °C, which surpasses the reported non-noble metal catalysts in literature works. This work may not only open an avenue for obtaining active and selective catalysts for propyne selective hydrogenation but also promote research on the role of MXenes in catalysis.
研究领域:
化学工程
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材料科学
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催化
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DOI
高影响因子
JOURNAL OF CONTROLLED RELEASE
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2026
·
IF 11.5
Ying-Tong Ye,Xi Xiao,Hong-Ying Xia,Jie Li,Zhen-Zhen Gong,Ai-Zheng Chen,Shi-Bin Wang,Ranjith Kumar Kankala
Despite the success of various intelligent materials in meeting the multiple needs of diabetic ulcer wounds (DUW) healing, it is often challenging to consider the entire healing process, from early antibacterial and anti-inflammatory effects to late matrix remodeling and angiogenesis characteristics, by releasing multiple active ingredients in stages and on demand. Herein, we designed a versatile bilayer (GCM/Clean-GDA/Cure) hydrogel dressing with light-controlled, spatiotemporal sequential release of MXene nanosheets (MX NSs)/nitric oxide (NO) gas for the healing of methicillin-resistant Staphylococcus aureus (MRSA) biofilm-infected DUWs. Initially, the lower GCM layer comprised carboxymethyl chitosan-gelatin and cerium oxide (CeO 2 )-decorated MX NSs (CO-MX), and the upper GDA layer consisted of dopamine-modified methacrylated gelatin (GelMA-DA) with L-arginine (L-Arg) as a precursor. Under NIR irradiation, the GCM hydrogel releases photothermal-induced CO-MX NSs as self-regenerating antioxidants, exhibiting 98.25 % inhibition against MRSA and 96.37 % inhibition against Pneumonia aeruginosa. The abundant oxygen vacancies and reversible Ce(III)/Ce(IV) redox pairs of the released Ce species from CO-MX NSs could attenuate inflammation and promote early macrophage polarization. The light-assisted gel–sol thermal transition of the lower GCM layer further exposes the upper GDA layer, providing a conducive microenvironment for angiogenesis and tissue remodeling. L-Arg in the GDA layer could enable light-controlled in situ release of NO gas activated by elevated reactive oxygen species (ROS), reaching 7.71 μM within 10 min of exposure to NIR light. Thus, the NIR-assisted bilayer treatment group achieved a 97.74 % wound closure rate. Finally, the transcriptomic analysis validated the activation of regenerative pathways and suppression of excessive inflammatory and metabolic stress signals. Together, the photo-controlled sequential release of MX NSs and NO gas from the bilayer could expand the application of light-responsive nanomaterials, providing an innovative therapeutic modality for in situ treatment of diabetic wounds infected by highly drug-resistant MRSA biofilms.
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高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Zhihui Liu,Xiaohua Zhu,Qiujun Lu,Meiling Liu,Haitao Li,Youyu Zhang,Yang Liu,Shouzhuo Yao
The composition and activity of the gut microbiota are crucial for health management and disease treatment. Herein, we develop a rapid and robust multichannel sensor array via a recognition engineering strategy using antimicrobial agent (vancomycin, bacitracin, and lysozyme) functional gold nanoclusters and gluconamide-modified Ti3C2 MXenes, which provide superior fingerprint patterns to distinguish gut-derived bacteria. The discrimination ability of the sensor array was highly improved via the synergistic recognition between the bacteria and the various antimicrobial agents. Five gut-derived bacteria, including probiotics, neutral, and pathogenic bacteria were clearly differentiated and discriminated from the bacteria mixtures. Furthermore, the sensing system was successfully applied for the accurate classification of human colorectal cancer samples from healthy individuals rapidly (30 min) with clinically relevant specificity. The rapidity, simplicity, and economic cost of this strategy offers a robust platform for gut microbiota analysis.
研究领域:
生物医学工程
·
微生物学
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纳米技术
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医学诊断
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癌症研究
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产品关联
DOI
PubMed
高影响因子
ANALYST
·
2023
·Vol. 148
·期 20
·5060-5069
·
IF 4.2
Jun Sun,Rongquan Zhu,Xiaojiao Du,Bing Zhang,Min Zheng,Xingyu Ji,Long Geng
A photo-driven self-powered aptasensor was constructed based on a matching capacitor and the ZnIn2S4/Ti3C2 heterojunction as the photoanode and Cu2O as the photocathode in a dual-photoelectrode sensing matrix for multiple signal amplification for the ultrasensitive detection of microcystin-RR (MC-RR). The introduction of Ti3C2 MXene nanosheets on the photoanode surface can not only accelerate the transfer and separation of photoinduced electron/hole pairs, thus enhancing the output signal of the photo-driven self-powered system, but also provide a larger specific surface area for the immobilization of the bio-recognition unit aptamer. More importantly, for a portable and miniaturized device, a micro-workstation with the size of a universal serial bus (USB) disk and a novel short-circuit current access was proposed to capture the instantaneous output electrical signal for real-time data tracking. In such a way, a sensitivity of 2.7 mA pM−1 was achieved when the matching capacitor was integrated into the self-powered system, which was 22 times that without a capacitor. After the interaction between MC-RR and the corresponding aptamer, a ‘signal-off’ detection configuration was formed via the steric hindrance effect. Therefore, such a multiple signal amplification system realized the ultrasensitive and selective determination of MC-RR successfully. Under optimal conditions, the linear range of the self-powered aptasensor was 0.1 to 100 pM and the detection limit was 0.033 pM (S/N = 3). The aptasensor was applied to the detection of MC-RR in fish, exhibiting good reproducibility (≈3.88%), paving the way for detecting microcystins in real-life samples.
研究领域:
环境科学
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分析化学
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生物传感技术
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DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Qi Liu,Zongyi Li,Caifeng Zou,Shi Feng,Juncheng Song,Xiangyang Li
Timely and accurate on-site detection of ochratoxin A (OTA) is extremely important for global public health. In this study, a fluorescence/colorimetric biosensor based on Ti 3 C 2 nano-materials (Ti 3 C 2 -NMS) and a machine-learning (ML) based fluorescence/colorimetric intelligent learning system for detection of OTA concentration (COTA) were developed. The sensor was fabricated by functionalizing Ti 3 C 2 -NMS prepared by physical-exfoliation assisted metal-ion-induction using ssDNA. The Ti 3 C 2 -NMS exhibited good fluorescence quenching characteristics (FQC) and peroxidase-like activity (PLA). More surprisingly, the functionalization of Ti 3 C 2 -NMS by ssDNA further enhanced the FQC and PLA of the material, which could be used for dual-mode detection of OTA. When different COTA existed, ssDNA competitively bound to OTA, resulting in regular changes in fluorescence and colorimetric signals of the sensor, which realized the accurate and sensitive biosensing detection of OTA in two modalities. Based on a series of fluorescent/colorimetric RGB datasets collected by a self-developed application, a dual-channel ML model had been developed. This model can be integrated into mobile phones, clouds, and PCs to achieve intelligent sensing detection of OTA with the assistance of fully connected artificial neural networks. The method constructed had high specificity, low cost, and fast responsiveness, with a LOD as low as 1.58 pg mL −1 , indicating excellent potential for application and promotion.
研究领域:
食品安全检测
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纳米生物技术
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人工智能应用
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）