TALANTA
·
2024
·
IF 5.6
Lekai Chang,Shuli Bai,Ping Wei,Xingyue Gao,Jinfeng Dong,Bingpu Zhou,Chao Peng,Jianbo Jia,Tiangang Luan
In this study, the plasmonic Ag nanoparticles (Ag NPs) were uniformly anchored on the high conductivity Nb 2 C T x (MXene) nanosheets to construct an Ag/Nb 2 C T x substrate for surface-enhanced Raman spectroscopy (SERS) detection of polystyrene (PS) nanoplastics. The KI addition (0.15 mol/L), the volume ratio between substrate colloid and nanoplastic suspension (2:1), and the mass ratio of Nb 2 C T x in substrate (14%) on SERS performance were optimized. The EM hot spots of Ag/Nb 2 C T x are significantly enlarged and enhanced, elucidated by FDFD simulation. Then, the linear relationship between the PS nanoplastics concentration with three different sizes (50, 300, and 500 nm) and the SERS intensity was obtained (R 2 > 0.976), wherein, the detection limit was as low as 10 −4 mg/mL for PS nanoplastic. Owing to the fingerprint feature, the Ag/Nb 2 C T x -14% substrate successfully discerns the mixtures from two-component nanoplastics. Meanwhile, it exhibits excellent stability of PS nanoplastics on different detection sites. The recovery rates of PS nanoplastics with different sizes in lake water ranged from 94.74% to 107.29%, with the relative standard deviation (RSD) ranging from 2.88% to 8.30%. Based on this method, the expanded polystyrene (EPS) decomposition behavior was evaluated, and the PS concentrations in four water environments were analyzed. This work will pave the way for the accurate quantitative detection of low concentration of nanoplastics in aquatic environments.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Magnesium and Alloys
·
2023
·
IF 17.6
Xiang Zhou,Haotian Guan,Heng Lu,Yangfan Lu,Jianbo Li,Jingfeng Wang,Yu'an Chen,Qian Li,Fusheng Pan
While early transition metal-based materials, such as MXene, has emerged as an efficient catalyst for the Mg-based hydrogen storage materials, their strong interaction with hydrogen resulted in the high hydrogen diffusion barrier, hindering further improvement of catalytic activity. A MXene is characterized by rich anionic groups on its surface, significantly affecting electronic and catalytic functionalities. Using Nb 2 C T x as an example, we herein illustrate the critical role of anionic T x defects on controlling hydrogen dissociation and diffusion processes in Mg-based hydrogen storage materials. The hydrogen desorption properties of MgH 2 can be significantly enhanced by utilizing T x controllable Nb 2 C T x , and it can release 3.57 wt.% hydrogen within 10 min under 240 °C with the reduced dehydrogenation activation barrier. It also realized stable de/hydrogenation reactions for at least 50 cycles. DFT studies combined with kinetic analysis revealed that the catalyst‒hydrogen interaction could be systematically controlled by optimizing surface T x defect density, accelerating the hydrogen dissociation and diffusion processes at the same time. These results demonstrate that the T x defects serve as the effective catalytically active centers of Nb 2 C T x , offering a flexible catalyst design guideline.
研究领域:
材料科学
·
能源化学
·
纳米技术
·
表面科学
·
催化化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiong Yu,Hao Li,Min Li,Xiaoyan Wen,Shuo Deng,Sisi Liu,Ming-Yu Li,Haifei Lu
MXenes with numerous superior properties have great potential for portable and conformal humidity sensing, which can meet the ever-increasing requirements for noncontact medical diagnosis, noninvasive epidermal detection, and environmental monitoring. Due to the ambiguous mechanism, the absence of an efficient approach for improving the sensitivity and selectivity remains a big obstacle for realization of MXene-based humidity sensing. In this work, the evolution of humidity sensing mechanisms of few-layered Nb2CTx nanosheets before and after self-oxidation in aqueous solutions are clarified depending on a systematic comparison. The evolution of structure and chemical bonds in few-layered Nb2CTx nanosheets after different incubation durations has been investigated to understand the in situ self-oxidation process and establish the relationship between the oxidation degree and humidity sensing performance. Meanwhile, the humidity sensing mechanism of sensors for different few-layered Nb2CTx nanosheets has been also clarified, and the humidity sensitivity has been optimized to −2.3 × 104 with a relative humidity of 53%. Compared with the sensor prepared from as-prepared few-layered Nb2CTx nanosheets, the humidity sensing selectivity from oxidized few-layered Nb2CTx nanosheets has been improved, contributed to by the transformation of the sensing mechanism from electronic conduction to ionic conduction. Finally, the oxidized few-layered Nb2CTx nanosheets have been prepared on a PI substrate to demonstrate its application in a flexible humidity sensor, providing a facile solution for ultrasensitive wearable gas sensing.
研究领域:
材料科学
·
传感技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Qiuni Zhao,Yadong Jiang,Zaihua Duan,Zhen Yuan,Jiajia Zha,Zhikang Wu,Qi Huang,Zhan Zhou,Hai Li,Feng He,Yuanjie Su,Chaoliang Tan,Huiling Tai
Existing wearable sensing electronics generally require to connect a battery for the power supply. Despite many years of effort, it still remains a great challenge to develop self-powered sensing systems without external power supplies. Herein, we develop a neuron-like MXene Nb 2 CT x /sodium alginate (Nb 2 CT x /SA) composite films prepared by an electrospinning approach. The Nb 2 CT x /SA composite film not only can be used to fabricate a high-performance electronic humidity sensor, but also to construct a moisture-triggered nanogenerator with a sustainable voltage output. Importantly, the humidity sensor is demonstrated to be portable and compatible for applications in respiration assessment, noncontact monitoring and intelligent alarm. More importantly, by simply integrating the Nb 2 CT x /SA film-based sensor/nanogenerator with a capacitor and light-emitting diode (LED), a prototype of self-powered sensing system capable of indicating different relative humidity (i.e., low, medium or high) through the LED’s brightness without external power supplies is demonstrated. This work not only demonstrates the design and fabrication of a smart self-powered humidity sensing system, but also opens a new avenue for development of next-generation intelligent wearable electronics.
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2023
·
IF 5.8
Wei Guo,Lijun Liang,Yaxu Zhao,Congyi Zhao,Xiong Lu,Yunpeng Cao,Faming Gao
In this study, the SnO 2 /Nb 2 CT x MXene nanocomposite containing 0D/2D interfaces was prepared by situ growth strategy of one-step hydrothermal method . A SnO 2 /Nb 2 CT x MXene based acetylcholinesterase (AChE) biosensor was constructed for pesticide detection. Highly conductive Nb 2 CT x MXene, acting as substrate material, restrained the agglomeration of nanoparticles (NPs) and accelerated electron migration due to the confinement effect and well-known accordion-like layered structure. In addition, SnO 2 anchored on both sides of the Nb 2 CT x MXene nanosheets effectively provided a large surface area, abundant surface groups and active sites, which preserved numbers of electrons at the interface of the heterojunction . The SnO 2 /Nb 2 CT x MXene hybrids with outstanding conductivity, good biocompatibility and structural stability were beneficial for AChE immobilization. Under the optimized conditions, as-fabricated electrochemical biosensor demonstrated superior performance with linear detection range of 5.1 × 10 −14 - 5.1 × 10 −7 M for chlorpyrifos , along with the limit of detection (LOD) down to 5.1 × 10 −14 M (calculated for 10% inhibition). Furthermore, it is highly expected that this biosensor can be applied for the detection of other organophosphorus pesticides in the environment, providing an effective nanoplatform in biosensing field.
研究领域:
生物传感器
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电化学检测
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Runmin Huang,Dan Liao,Zhenhua Liu,Jingang Yu,Xinyu Jiang
Construction of high-sensitive analytical platform to monitor organic pollutants in the environment is of significance. Nitrophenol is toxic organic pollutant, causing serious damage to biosphere. Herein, a simple self-assembled method was proposed to design a novel heterostructure (MXene/ ZIF) composed of Nb 2 CT X and Zn-Co-ZIFs derived bimetallic Zn, Co embedded N-doped carbon (Zn-Co-NC) nanocage. The Nb 2 CT X / Zn-Co-NC composite modified electrodes were applied for the electrochemical detection of 4-nitrophenols (4-NP). SEM images revealed that the insertion of Zn-Co-NC can effectively avoid Nb 2 CTx from restacking. EDS and XPS demonstrated the successful synthesis of bimetallic Zn, Co embedded N-doped carbon nanocage. Excellent conductivity and large specific surface area of Nb 2 CTx as well as superior catalytic activity of Zn-Co-NC nanocage enhance the electrochemical performance of Nb 2 CTx/ Zn-Co-NC sensor. Under optimal conditions, the achieved wide linear range was 1 μM to 500 μM. The low detection limit of 0.070 μM with high sensitivity of 4.65 μA μM −1 cm -2 was obtained. Furthermore, the Nb 2 CTx/ Zn-Co-NC sensor holds outstanding selectivity and stability. Therefore, the innovative structure and excellent properties of MXene/ ZIF make them alternative materials for various electrochemical sensors for the detection of other toxic organic pollutants.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2024
·
IF 3.8
Huanhuan Liu,Liushan Jiang,Shiyu Huang,Jingwen Niu,Yue Zhang,Jiawei Liao,Guangyu Dong,Denghao Song,Qingxiang Zhou
As a typical kind of persistent organic pollutants, polychlorinated biphenyls (PCBs) may cause great harm to human health. Recently, MXene has gained considerable attention due to its specific properties for the removal of pollutants by various principles. Present work reported a new functionalized MXene material, NH 2− MIL-88 modified magnetic Nb 2 CT X , for developing a facile and efficient magnetic solid phase extraction method for enrichment and sensitive detection of PCBs in environmental water samples. The adsorption mechanism and parameters that may impact the extraction efficiencies of PCBs were explored. Gas chromatography-tandem mass spectrometry was utilized to detect the enriched PCBs. The results demonstrated that nine PCBs possessed good linearities in the range of 0.005 ∼ 50 μg L -1 and 0.005∼ 40 μg L -1 , respectively. The detection limits of PCBs were over range of 0.06 - 0.28 ng L -1 . The adsorption of PCBs on NH 2− MIL-88 modified magnetic Nb 2 CT X followed quasi-second-order kinetic and Langmuir adsorption isotherm models. The fortified recoveries in real water samples ranged from 87.6 % to103.4 % (n = 3), which confirmed that the established method owned merits such as simplicity, rapidness, robustness, and high extraction efficiencies, and might be utilized for the detection of trace PCBs in environmental water samples.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Aiting Chen,Yanping Wei,Du Tuo,Chuanqin Zhou,Shuting Shi,Nana Tang,Quanguo He,Jun Liu
A facile and novel electrochemical determination of Fluoxetine (FLX) at submicromolar concentration Niobium carbide (Nb 2 CT x ) and Nitrogen-doped Reduced Graphene Oxide (NRGO) hybridized electrodes as sensing platform is demonstrated. Herein, Niobium carbide (Nb 2 CT x ) was successfully prepared by etching Nb 2 AlC and then ultrasonically compounded with Nitrogen-doped Reduced Graphene Oxide (NRGO), to form a well-dispersed Nb 2 CT x /NRGO composite, which was modified onto a glassy carbon electrode (GCE). The morphology, structure and electrochemical property of the Nb 2 CT x /NRGO/GCE was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The electrocatalytic activity of the Nb 2 CT x /NRGO/GCE for FLX oxidation was studied in detail. The peak currents showed two good linear relationships (R 2 = 0.9962 and 0.9949) with FLX concentrations (1.0–10 µM and 10–100 µM) and a detection limit of 0.34 µM (S/N = 3). The sensor has good selectivity, repeatability, reproducibility and stability, and is capable of sensitively determining FLX in human serum and urine samples of clinical biological fluids. This work is believed to be of great significance and of broad interest for research on innovative MXene materials development and biomedical sensing applications.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Hongliang Fu,Yue Lian,Yongfeng Hu,Jing Zhao,Huaihao Zhang
The development of highly stable and strongly active electrode materials for sodium-ion batteries (SIBs) and overall water splitting (OWS) is critical in sustainable energy storage and conversion systems. Here, a new electrode material N-Fe-C@Nb 2 CT x is introduced, with a layered sandwich structure consisting of N-doping Fe-MOF derived-nanorods (Fe-C) and Nb 2 CT x MXenes. Specifically, Nb 2 CT x obtained by etching Nb 2 AlC with HF acid is used as the main body to construct the layered sandwich structure with Fe-C as the filler. Benefiting from this structure, Fe-MOF grows in situ within Nb 2 CT x , which restrains MXenes aggregation and stacking and also alleviates the bulk effect of sodium-ion embedding/de-embedding, thus improving its stability. Again, the more exposed active sites from the layered sandwich structure and N-doping introduction ensure high reactivity as electrode materials. In addition, Fe-C nanorods strengthen the linkage between the Nb 2 CT x layers and N-doping enhances the ion/electron transport rate, thereby boosting the effective mass transfer and electrical conductivity. Density functional theory (DFT) calculations show that Fe-C and N-doping help increase the density of states (DOS) and material electrical conductivity. Meanwhile, the generated oxygen species (*OH and *O) in OER are captured by in situ FT-IR test. As a result, the N-Fe-C@Nb 2 CT x electrochemical test displays good electrochemical performance in SIBs and OWS.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Joule
·
2021
·Vol. 5
·期 11
·2993-3005
·
IF 41.248
Xinliang Li,Xinyao Ma,Yue Hou,Zhenhua Zhang,Yue Lu,Zhaodong Huang,Guojin Liang,Mian Li,Qi Yang,Jiale Ma,Na Li,Binbin Dong,Qing Huang,Furong Chen,Jun Fan,Chunyi Zhi
Although MXene has been widely used in many energy storage systems, the absence of a high intrinsic voltage plateau results in its poor discharging feature. Herein, we report a Nb 2 CTx MXene cathode with an apparent discharge voltage plateau for high-performance aqueous zinc ion batteries. Triggered by a repeated high-voltage scanning up to 2.4 V, the Nb 2 CTx cathode gradually displays a stable Zn 2+ storage dominated by a battery behavior. A high discharge voltage plateau of 1.55 V is presented, which is distinct from all reported MXene electrodes. Consequently, a record-level energy density among all aqueous MXenes electrodes of 146.7 Wh kg −1 with a 63% contribution from the plateau region is obtained, which is 292% that of the capacitive Nb 2 CTx electrode. The developed high-voltage scanning strategy is also effective for Ti 3 C 2 T x MXene to achieve a remarkable voltage plateau.
研究领域:
材料科学
·
储能
·
电化学
·
纳米材料
✓ 已验证
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Ya'’nan Zhao,Liyang Zhao,Yi'’na Yang,Tianran Zhao,Chunna Yu,Chang Zhao,Guangjian Xing
Freshwater scarcity and energy shortages stand as two of the most pressing global challenges confronting modern society. The integration of solar-driven interfacial evaporation with the hydrovoltaic effect emerges as a highly promising strategy to address both issues simultaneously. In this study, we report the development of Janus Nb 2 CT X /graphene aerogels (NGAs) specifically engineered to synergistically facilitate solar-driven seawater evaporation and hydrovoltaic power generation. The Janus NGAs were fabricated via a combination of hydrothermal reaction, freeze-drying, and surface modification techniques, yielding a three-dimensional porous architecture with distinct hydrophilic-hydrophobic asymmetry—a key structural feature for their dual-functional performance. Under 1 sun irradiation, the optimized NGA-3 sample achieved a high seawater evaporation rate of 1.64 kg·m −2 h −1 and an exceptional photothermal conversion efficiency of 86.61 %, attributed to the reduced water evaporation enthalpy (1904 kJ·kg −1 ) induced by the formation of intermediate water within the aerogel's porous structure. Meanwhile, the Nb 2 CT X MXene component enhances broadband sunlight absorption through the localized surface plasmon resonance (LSPR) effect, further boosting photothermal conversion. Concurrently, the NGAs exhibit robust hydrovoltaic performance: in NaCl solution, NGA-3 generated a stable output voltage of 147 mV under 1 sun and 236 mV under 3 sun. A peak power density of 197 μW·cm −2 was achieved in 10 wt% NaCl solution, demonstrating its adaptability to high-salinity environments. Additionally, the NGAs maintain excellent salt resistance and long-term operational stability. The synergistic integration of efficient photothermal conversion and electricity harvesting in the Janus NGAs offers a viable solution to alleviate global freshwater and energy pressures.
研究领域:
材料科学
·
可再生能源
·
环境工程
·
纳米技术
·
能量收集
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Yuwei Liu,Jiayi Tang,Jiuao Wang,Hao Yue,Zongliang Du,Xu Cheng,Haibo Wang,Xiaosheng Du
The development of form-stable phase change materials (PCMs) that combine solar-thermal storage capacity, electromagnetic interference (EMI) shielding performance, and flame-retardancy is crucial for effective building energy management and conservation. Herein, innovative Nb 2 CT x MXene/starch hybrid aerogels supported phase change composites (MSPCMs) with superior solar-thermal conversion efficiency, EMI shielding and flame-retardancy were fabricated by selectively etching of Nb 2 AlC MAX, modifying starch with sodium phytate, constructing MXene/starch hybrid aerogels (MSPAs), and impregnating aerogels with molten n -eicosane. Differential scanning calorimetry (DSC) analyses revealed that MSPCMs exhibited high PCM loading yield (up to 498.9 %) and heat storage density (up to 232.1 J/g). Nb 2 CT x MXene nanosheets significantly enhanced the solar-thermal storage efficiency (up to 87.9 %) and EMI shielding performance of MSPCMs. Additionally, increasing the content of sodium phytate in MSPAs noticeably reduced the peak heat release rate (pHRR) and the total heat release (THR) of MSPCMs, thereby improving the flame-retardant properties of the synthesized PCM composites.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 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）