MATERIALS RESEARCH BULLETIN
·
2024
·
IF 5.3
Zhiwen Shi,Lijuan Qiao,Zhi Jia,Peng Zhang,Bingxin Liu,Li Gao
It is of great significance to detect methanol in human exhaled breath since it may cause neurological disorders. In this study, N-doped Ti 3 C 2 T x MXene was synthesized by annealing and nitrogen doping in clay-like Ti 3 C 2 T x MXene. Then, TiO 2 nanospheres was generated in situ on the surface of N-doped Ti 3 C 2 T x MXene to provide adsorption and reaction sites for methanol. Based on the synergistic effects of electronic properties and gas adsorption, the N-Ti 3 C 2 T x MXene/TiO 2 exhibits high responsiveness and excellent selectivity to methanol at room temperature. Moreover, the detection limit is 0.1194 ppm. In addition, the adsorption and oxidation process of methanol on the N-Ti 3 C 2 T x MXene/TiO 2 was explored by in situ infrared spectra testing to reveal that the oxygen vacancy on the surface of N-Ti 3 C 2 T x MXene/TiO 2 plays an important role in the selective detection of methanol. This experiment provides a feasible solution for the detection of methanol gas in exhaled breath at room temperature.
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高影响因子
ANALYTICAL SCIENCES
·
2024
·Vol. 40
·期 6
·1081-1087
·
IF 1.8
Mei Xuqiao,Zeng Zhenhua,Xu Wenxin,Yang Huicong,Zheng Yuanhai,Gao Haimin,Wu Chuncai,Zheng Yanping,Xu Qiaoli,Wang Guowei,Xu Yuhuang,Wu Ayang
CA125 (carbohydrate antigen 125) is an important biomarker of ovarian cancer, so developing effective method for its detection is of great significance. In the present work, a novel sandwich-like electrochemical immunosensor (STEM) of CA125 was constructed by preparing nanoribbon-like Ti 3 C 2 T x MXenes (Ti 3 C 2 T x NR) to immobilize primary antibody (PAb) of CA125 and UIO-66-NH 2 MOFs structure to immobilize second antibody (SAb) and electroactive toluidine blue (Tb) probe. In this designed STEM assay, the as-prepared Ti 3 C 2 T x NR nanohybrid offers the advantages in large surface area and conductivity as carrier, and UIO-66-NH 2 provided an ideal platform to accommodate SAb and a large number of Tb molecules as signal amplifier. In the presence of CA125, the peak currents of Tb from the formed STEM structure increase with the increase of CA125 level. After optimizing the related control conditions, a wide linear range (0.2–150.0 U mL −1 ) and a very low detection limit (0.05 U mL −1 ) of CA125 were achieved. It’s thus expected the developed STEM strategy has important applications for the detection of CA125. Graphical abstract
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高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 40
·14929-14938
·
IF 8.067
Xudong Liu,Yong Liu,Shangli Dong,Xuefeng Zhang,Shida Hou
Chemical doping of MXenes with heteroatoms is expected to be a promising strategy for enhancing their electrochemical performance. Nevertheless, the synergistic effects of chemical doping and 3D structure construction have rarely been investigated in depth. Aiming to avoid MXene nanosheet restacking and further enhance the electrochemical performance, herein, we reported a simple strategy combining nitrogen doping with a 3D structure construction on MXenes via a one-step hydrothermal method. The location and types of nitrogen doping can be adjusted by hydrothermal conditions. The obtained nitrogen-doped Ti3C2Tx aerogel had an ultra-high specific surface area of 200.8 m2 g−1 with high porosity. The open reticular walls can expose more nitrogen-enriched Ti3C2Tx edges to the electrolyte. Nitrogen dopants at the edges of Ti3C2Tx nanosheets produced more number of active sites and provided higher pseudocapacitance, and the presence of N-C4 increased the electron mobility of Ti3C2Tx, which reduced charge transfer resistance evidently. As a result, the nitrogen-doped Ti3C2Tx aerogel showed an excellent specific capacitance (531 F g−1 in H2SO4 electrolyte) with good cyclic stability (remaining 96% after 5000 cycles).
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 37
·11549-11558
·
IF 6.641
Chunli Hou,Huangzhong Yu,Chengwen Huang
MXenes, a newly interesting family of two-dimensional (2D) materials, have recently attracted wide attention owing to their unique photoelectric properties. In this study, 2D Ti3C2Tx, a classic representative of the MXene family, is fabricated and functioned as a hole transport layer (HTL) in polymer solar cells (PSCs) due to its features of outstanding metallic conductivity, excellent optical transparency, suitable work function, and superior mechanical properties. The Ti3C2Tx nanosheets deposited from neutral solutions are incorporated between the photoactive layer and the anode electrode as HTLs to facilitate charge transport and collection characteristics in PSCs. The results show that the Ti3C2Tx film possesses good light transmission and high conductivity. The photovoltaic characteristics of the Ti3C2Tx-based devices are systematically investigated. It is demonstrated that the incorporation of Ti3C2Tx as a HTL endows PSCs with superior charge extraction capability, exhibiting a significantly higher power conversion efficiency (PCE) of 10.53% than that of the only ITO-based device (4.21%) with PBDB-T as the donor and ITIC as the acceptor. Such photovoltaic performance also outperforms that of the state-of-the-art PEDOT:PSS-based devices (10.11%). Furthermore, the Ti3C2Tx-based device also shows better long-term stability under atmospheric conditions without any encapsulation than the PEDOT:PSS devices, which indicates that the 2D Ti3C2Tx material possesses great potential in PSCs.
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Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 4
·2988-3001
·
IF 11.806
Zhao Xiaoyu,Zhang Yingbing,Hou Yongdan,Zhao Zijian,Gong Yaxin,Wang Yanfei,Wei Huige,Pol Vilas G.
A beneficial strategy for enhancing the electronic conductivity of transition metal chalcogenides (TMCs) as lithium-ion battery anode material is through shortening the charge transfer path between the sulfide particles. However, the combination between the carbon-based matrix and electroactive materials is sometimes weak, which hinders the cycling stability. In this paper, the Ti-based MXene, T 3 C 2 T x , was used as a conductive frame, combined with the ZIF-67-based CoS 2 /C grains yielding Ti 3 C 2 T x /CoS 2 /C composite electrode through one-step and two-step synthesis methods, which displayed significantly enhanced capacity, rate performancem, and cycling stability. The compsoite reached a capacity retention of 82.6% after 100 cycles with a significantly higher capacity of 1020.5 mAh/g at 0.2 A/g current density. After 100 discharge–charge cycles, the Ti 3 C 2 T x /CoS 2 /C composite revealed a low volume expansion of 9.5%, suggesting superior structural integrity and stability with the synergistic effect of both MXene 2D and CoS 2 /C 3D nanostructures. Graphical abstract
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Nanomaterials
·
2023
·Vol. 13
·期 15
·2261
·
IF 5.3
Zelin Li,Yang Zhao,Qinglin Deng,Xuhui Zhu,Yipeng Tan,Ziwen Feng,Hao Ji,Shan Zhang,Lingmin Yao
Using natural light energy to convert water into hydrogen is of great significance to solving energy shortages and environmental pollution. Due to the rapid recombination of photogenerated carriers after separation, the efficiency of photocatalytic hydrogen production using photocatalysts is usually very low. Here, efficient CdZnS nanoparticles@Ti3C2TxMXene nanosheet heterojunction photocatalysts have been successfully prepared by a facile in situ growth strategy. Since the CdZnS nanoparticles uniformly covered the Ti3C2TxMxene nanosheets, the agglomeration phenomenon of CdZnS nanoparticles could be effectively inhibited, accompanied by increased Schottky barrier sites and an enhanced migration rate of photogenerated carriers. The utilization efficiency of light energy can be improved by inhibiting the recombination of photogenerated electron-hole pairs. As a result, under the visible-light-driven photocatalytic experiments, this composite achieved a high hydrogen evolution rate of 47.1 mmol h−1g−1, which is much higher than pristine CdZnS and Mxene. The boosted photocatalytic performances can be attributed to the formed heterojunction of CdZnS nanoparticles and Ti3C2TxMXene nanosheets, as well as the weakened agglomeration effects.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiaochan Zhao,Ruoyu Zhang,Qian Li,Yufan Liu,Zhibo Zhang,Yongfu Zeng,Kaoqi Lian,Lianfeng Ai
To improve the pre-treatment efficiency of fluoroquinolones (FQs) in food testing, a novel functionalized MXene, Ti 3 C 2 T x /SiO 2 -NH 2 , was synthesized via electrostatic interactions between Ti 3 C 2 T x and aminopropyl-modified silica (SiO 2 -NH 2 ). Used as a dispersive solid-phase extraction (d-SPE) adsorbent, it enabled a new UPLC-MS/MS method for nine FQs in pork. Compared to pristine Ti 3 C 2 T x and SiO 2 -NH 2 , the composite had a larger adsorption capacity, achieving a specific surface area of 251.28 m 2 /g. Adsorption was dominated by ionic interactions and followed a monolayer model. Optimized d-SPE conditions: 20 mg adsorbent, 2 min extraction (pH 7), 2 mL 5 % ammoniated methanol desorption (1 min). Notably, extraction in hexane integrated with hexane degreasing, cutting total pretreatment time to <10 min. Under optimal conditions, linearity for FQs was 0.5–100 ng/mL (r 2 > 0.99). Detection limits (DLs) and quantitation limits (QLs) were 0.034–0.553 μg/kg and 0.114–1.845 μg/kg, respectively. Recoveries were 85.80–105.70 %, with intra-day (1.06–7.53 %) and inter-day (1.88–12.27 %) RSDs. After 7 cycles, six FQs still had 71.57–84.92 % recoveries. Ti 3 C 2 T x /SiO 2 -NH 2 is a promising d-SPE adsorbent, and the UPLC-MS/MS method offers rapid, sensitive FQs monitoring in pork.
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Analytical Methods
·
2025
·
IF 2.6
Jinping Tang,Yuhai Wang,Chunxu Wang,Ziwei Yu,Jin Wang
Surface-enhanced Raman scattering (SERS) has emerged as a powerful analytical tool for trace molecular detection, enabling identification of target analytes through their characteristic vibrational fingerprints. Its high sensitivity, selectivity, and non-destructive detection capabilities make it extremely valuable in fields such as biological detection, food safety, and environmental detection. Currently, metal carbonitride (MXene) as an emerging two-dimensional material has become a hot topic in the field of SERS. In this work, by combining the advantages of bimetallic nanoparticles and MXene nanosheets, Ni/Ag nanoparticles with different proportions were modified on monolayer MXene nanosheets through chemical reduction and transmetallation reactions for the rapid detection of thiram. The evaluation of the SERS performance of the MXene–Ni/Ag composite substrate for the Raman reporter molecule mercaptobenzoic acid (MBA) demonstrates a high SERS performance factor (SPF) of 8.2 × 106, and a low detection limit of 10−10 M. Also, for the detection of the pesticide thiram, the substrate exhibits high sensitivity and reliable quantitative analysis capabilities, retaining detectable spectral features even at concentrations down to 10−9 M. Meanwhile, the substrate also exhibits a low relative standard deviation (RSD) value in reproducibility and maintains good stability over a certain period. Ni/Ag bimetallic nanoparticles provide high SERS activity, while MXene nanosheets effectively concentrate target molecules through their strong adsorption capacity. These results indicate that MXene–Ni/Ag composite substrates can serve as a highly effective SERS platform for sensitive and reliable environmental monitoring.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qiang Li,Tianhui Zhao,Junjie Zhu,Muyuan Ma,Guoqing Hou,Mengyuan Fang,Yu Shen,Xiaoli Zhao,Zhi Tang,Fengchang Wu
Acetaminophen (ACTP) is a widely used antipyretic and analgesic, especially after the COVID-19 pandemic, during which its extensive use led to widespread distribution in the environment. Conventional wastewater treatment methods struggle to fully degrade ACTP, posing potential risks to human health and ecosystems. Therefore, developing efficient, safe, environmentally friendly, and cost-effective techniques for ACTP degradation is imperative. Herein, ultrathin-single Ti 3 C 2 T X MXene (USM) and multilayered Ti 3 C 2 T X MXene (MLM) with nanometer thickness and micron transverse size were synthesized from the MAX via acid/salt (HCl + LiF) etching process. Time-resolved photoluminescence indicated that the average fluorescence lifetimes (τ ave ) of USM (96.870 ns) and MLM (53.839 ns) are 9.47 and 5.26 times that of MAX (10.229 ns), respectively. Both materials exhibited excellent ACTP degradation ability (∼100 %) in a photocatalytic Fenton-like reaction process under visible light within 60 min. The visible light enhanced the degradation of ACTP by accelerating the redox cycles of Ti 3+ /Ti 4+ and achieving continuous catalytic activation of H 2 O 2 to form reactive oxygen species (h + , •OH, •O 2 – , and 1 O 2 ). Among these, h + radicals were the primary contributors, with •OH, •O 2 – , and 1 O 2 also playing supportive roles in the degradation process. The ecological structure–activity relationships analysis indicated that the degradation intermediates had significantly lower toxicity than ACTP itself. This study offers valuable insights into MXene’s application in photocatalytic Fenton-like systems, paving the way for efficient pharmaceutical degradation.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Zijie Mo,Pingjing Mo,Mingming Yi,Ziyue Hu,Guizhen Tan,Mohamed S. Selim,Yuanzhou Chen,Xiang Chen,Zhifeng Hao,Xiaolan Wei
The phase change materials (PCMs) are attractive and environmental-friendly way to improve the utilization rate in the field of photothermal conversion and solar radiation storage. However, the low photothermal conversion efficiency and low thermal conductivity characteristics of PCMs limit their practical applications. In order to improve the performance of these materials, we developed a novel polyethylene glycol (PEG 2000) PCMs composites supported by Ti 3 C 2 T x @polyvinyl alcohol (PVA) foam skeleton with several advantages like low-cost, scalable and simple preparation method by freeze-drying after PEG being introduced into the skeleton via vacuum impregnation. The thermal conductivity of Ti 3 C 2 T x /PEG composite containing 7.68 wt% skeleton was notably high as 0.428 W/(m·K)，which was 4.2 times higher than PEG 2000 (0.101 W/(m·K)). The improvement of thermal conductivity was mainly derived from the three-dimensional interconnected structures of the foamy skeleton. The actual phase change enthalpy of composite searched up to 131.1 J/g, and its photothermal conversion efficiency achieved 96.5%, demonstrating excellent photothermal conversion and storage ability. Furthermore, the Ti 3 C 2 T x /PEG composite exhibited structural stable property that avoids leakage of liquefied PCM during melting process. This multifunctional Ti 3 C 2 T x @PVA/PEG PCM provided a prospective application in thermal energy management systems regarding its high thermal conductivity , excellent photothermal conversion efficiency, thermal energy storage (TES) capability and structural stability.
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Advanced Science
·
2025
·
IF 14.1
Yanan Xiao,Qi Pu,Chenxing Wang,Xiaoteng Jia,Shixiang Sun,Quan Jin,Xiaolong Wang,Bin Wang,Peng Sun,Fangmeng Liu,Geyu Lu
Wearable self-powered pressure sensors present tremendous potential for object recognition. However, the fluctuated approach speed and distance may compromise the device output, thus affecting the recognition accuracy. Herein, a wearable self-powered pressure sensor with high sensitivity (1.48 V kPa −1 ), high output (130.5V), and high permeability (259.98 mm s −1 ) are developed where the contact barrier difference and triboelectric charge density of the triboelectric layer surface are dynamically regulated by modulating the surface groups resulting in a lower dielectric loss and higher output. The sensor leverages the polarity difference between the target object and the sensitive material to generate electrical signals at different speeds and distances through an electrostatic induction mechanism. With the assistance of the Transformer model with a self-attention mechanism, an average recognition accuracy of 94.3% is achieved by acquiring sensing signals at different speeds and distances. Simulating the ability of human vision, enables visually impaired people to acclimate to their surroundings more easily and independently and provides a critical advancement in the assistance of the blind with daily life.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chunyan Zhang,Yu Liu,Yi Zhao,Yining Qu,Li Wang,Han Zhang,Daomei Chen,Jiaqiang Wang
Most photocatalysts reported to date require sacrificial agents to achieve high-efficiency photocatalytic production of H 2 O 2 . Developing photocatalysts for H 2 O 2 production without sacrificial agents remains a significant challenge. In this study, we proposed an interfacial Schottky junction consisting of InP quantum dots (QDs) and Ti 3 C 2 T x nanosheets for photocatalytic production of H 2 O 2 without relying on any sacrificial agents. The InP/Ti 3 C 2 T x photocatalyst demonstrated high efficiency in generating H 2 O 2 , even when tested in wastewater and tap water. The photocatalytic rate of 5InP/Ti 3 C 2 T x reached 21.31 mmol g⁻¹ h⁻¹, which is 112 times greater than InP QDs. The 5InP/Ti 3 C 2 T x catalyst achieved a degradation performance of 99.9% for acid orange 7. The photocatalytic production of H 2 O 2 was effectively utilized in actual wastewater to decrease chemical oxygen demand (COD) levels. The COD concentration was decreased to 67 mg L −1 , well below the permissible threshold set by China's Ministry of Ecology and Environment for coking chemical industry emissions. As far as we know, no prior study has documented the application of InP in the photocatalytic production of H 2 O 2 within actual wastewater. This research explores the applications and impacts of InP compounds in the field of photocatalysis. This work introduces a novel approach for sacrificial agent-free photocatalytic H 2 O 2 production, offering a significant advancement in the field.
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