Analytical Methods
·
2023
·Vol. 15
·期 10
·1336-1344
·
IF 3.1
Yuling Jiang,Miao Yang,Mingyao Yu,Lingling Huang,Yue Ke,Lei Yang
Herein, a simple and highly sensitive electrochemical sandwich-like immunosensor for the squamous cell carcinoma antigen (SCCA) was constructed using gold nanoparticle/graphene nanosheet (Au/GN) nanohybrids as a sensing platform and β-cyclodextrin/Ti3C2Tx MXenes (β-CD/Ti3C2Tx) as a signal amplifier. The good biocompatibility and large surface area as well as the high conductivity of Au/GN allow the platform to load primary antibodies (Ab1) and facilitate electron transport. In the case of the β-CD/Ti3C2Tx nanohybrids, the β-CD molecule is dedicated to binding secondary antibodies (Ab2) through host–guest interactions, thus inducing the formation of the sandwich-like structure Ab2-β-CD/Ti3C2Tx/SCCA/Ab1/Au/GN in the presence of SCCA. Interestingly, Cu2+ can be adsorbed and self-reduced on the surface of the sandwich-like structure to form Cu0 since Ti3C2Tx MXenes can exhibit superior adsorption and reduction capabilities towards Cu2+, and a prominent current signal of Cu0 can be observed via differential pulse voltammetry. Based on this principle, an innovative signal amplification strategy has been proposed for SCCA detection, which avoids the process of labeling the probe and the specific immobilization step of catalytic components on the surface of amplification markers. After the optimization of various conditions, a wide linear range from 0.05 pg mL−1 to 20.0 ng mL−1, coupled with a low detection limit of 0.01 pg mL−1, was obtained for SCCA analysis. The proposed method for SCCA detection was also applied in real human serum samples and the observed results are satisfactory. This work opens up new pathways for constructing electrochemical sandwich-like immunosensors for SCCA and other targets.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Fei Wang,Jingxia Gao,Delin Yang,Haoming Li,Jinping Zhang,Jie Liu,Yong Liu,Fengzhang Ren
The uneven lithium deposition on Cu current collector and poor interface stability of lithium metal/electrolyte would lead to rapid capacity decay and potential safety risks, which severely hinder the practical applications of lithium metal batteries. In this work, the in-situ derived Ti 3 C 2 T x MXene/TiO 2 (labeled as MXene/TiO 2 ) composite with favorable lithiophilicity and conductivity is applied as modified layer on Cu foil current collector (labeled as MXene/TiO 2 @Cu) to obtain the uniform and dense lithium plating. Compared with bare Cu and commercial TiO 2 nanoparticles modified Cu current collector (labeled as Nano TiO 2 @Cu), the MXene/TiO 2 @Cu combines abundant lithium nucleation sites and improved conductivity, which could promote uniform lithium plating and stripping at high current density and effectively avoid the generation of dead lithium or lithium dendrites. As a result, the MXene/TiO 2 @Cu-based symmetric battery could stably cycle for 2000 h at high current density of 3 mA cm −2 with capacity of 3 mAh cm −2 , and the MXene/TiO 2 @Cu-Li‖LiFePO 4 full battery could maintain the high reversible capacity of 104.0 mAh g −1 at 1 C after 500 cycles. This work provides an effective and novel protection strategy for Cu current collector, which is critical for the design of lithium metal batteries with favorite rate capability at high current density.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Hao Xu,Shuai Liu,Zhiang Li,Fan Ding,Jie Liu,Weimin Wang,Kaikai Song,Ting Liu,Lina Hu
Solid polymer electrolytes (SPEs) have been considered the most promising separators for all-solid-state lithium metal batteries (ASSLMBs) due to their ease of processing and low cost. However, the practical applications of SPEs in ASSLMBs are limited by their low ionic conductivities and mechanical strength. Herein, we developed a three-dimensional (3D) interconnected MXene (Ti 3 C 2 T x ) network and Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) particles synergistically reinforced polyethylene oxide (PEO)-based SPE, where the association of Li + with ether-oxygen in PEO could be significantly weakened through the Lewis acid-base interactions between the electron-absorbing group (Ti–F, −O–) of Ti 3 C 2 T x and Li + . Besides, the TFSI − in lithium salts could be immobilized by hydrogen bonds from the Ti–OH of Ti 3 C 2 T x . The 3D interconnected Ti 3 C 2 T x network not only alleviated the agglomeration of inorganic fillers (LLZTO), but also improved the mechanical strength of composite solid electrolyte (CSE). Consequently, the assembled Li||CSE||Li symmetric battery showed excellent cycling stability at 35 ℃ (stable cycling over 3000 h at 0.1 mA cm −2 , 0.1 mAh cm −2 ) and −2 ℃ (stable cycling over 2500 h at 0.05 mA cm −2 , 0.05 mAh cm −2 ). Impressively, the LiFePO 4 ||CSE||Li battery showed a high discharge capacity of 145.3 mAh/g at 0.3 C after 300 cycles at 35 ℃. This rational structural design provided a new strategy for the preparation of high-performance solid-state electrolytes for lithium metal batteries.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yanli Wang,Wenjing Qin,Xiaoyu Hu,Zhongsheng Liu,Zhixin Ren,Huanqi Cao,Baigang An,Xiang Zhou,Muhammad Shafiq,Shougen Yin,Zunfeng Liu
A flexible sensor can be applied to monitor human motion, which can further be engineered with soft robotics to monitor their motion in the real time. However, to realize deformation detection with high-sensitivity in soft robots while simultaneously maintaining a high linearity and cyclic stability of the sensor yet remains as an unmet challenge. Herein, we fabricated strain sensors exhibiting a buckle and a sandwich like structure by spraying MXene (Ti 3 C 2 T x )/carbon nanotubes (CNTs)/fluoro-rubber composite materials onto a 200 % pre-stretched flexible rubber substrate. The resulting strain sensors displayed a wide range of detection (e.g., 1–150 %), high sensitivity (gauge factor (GF) for up to 461), good linearity, fast response time (21.2 ms), large stretching (150 %) as well as, excellent repeatability and stability. This sensor can further monitor the human physiology and the motion of the body. We also developed a soft robot with integrated sensors that enabled it to crawl like a caterpillar while leveraging its sensing function to detect its status in the real time. Conclusively, these hybrid strain sensors may have broad implications for robotics as well as wearable sensors for health monitoring and physiological recordings.
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NEW CARBON MATERIALS
·
2023
·
IF 5.7
Fang-yu Tao,Dan Xie,Wan-Yue Diao,Chang Liu,Hai-Zhu Sun,Wen-Liang Li,Jing-Ping Zhang,Xing-Long Wu
We report the fabrication of a lithiophilic Ti 3 C 2 T x MXene-modified carbon foam (Ti 3 C 2 T x -MX@CF) for the production of highly-stable LMBs that regulates Li nucleation behavior and reduces the volume change of a lithium metal anode (LMA). The 3D CF skeleton with a high specific surface area not only reduces the local current density to avoiding concentrated polarization, but also provides enough space to absorb the volume expansion during cycling. The excellent lithiophilicity of Ti 3 C 2 T x -MX produced by its abundant functional groups reduces the Li nucleation overpotential, guides uniform Li deposition without the formation of Li dendrites, and maintains a stable SEI on the anode surface. Consequently, a Li infiltrated Ti 3 C 2 T x -MX@CF symmetrical cell has an excellent cycling stability for more than 2 400 h with a low overpotential of 9 mV at a current density of 4 mA cm -2 and has a capacity of 1 mA h cm -2 . Furthermore, a Li- Ti 3 C 2 T x -MX@C||NCM111 full cell has a capacity of 129.6 mA h g -1 even after 330 cycles at 1 C, demonstrating the advantage of this method in constructing stable LMAs.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Qin Ma,Min Yang,Xin Ye,Zongliang Du,Xu Cheng,Haibo Wang,Dawei Xu,Xiaosheng Du
For wearable thermal management, phase change materials (PCMs) with solar-thermal conversion capacity are highly desired. However, traditional solid–liquid PCMs suffer challenges such as inherent solid stiffness, liquid leakage, and limited motion sensing capability. Herein, the flexible POE elastomer functions as a continuous supporting phase encasing n-octadecane in these innovative Ti3C2Tx MXene/polyolefin elastomer (POE)-based phase change foaming films (FPPMs), which have high flexibility and form stability, superior solar-thermal conversion efficiency, and sensitive motion detection. The supercritical carbon dioxide (scCO2) foaming technique was employed to enhance the flexibility and thermal insulation performance of the synthesized flexible phase change films. The FPPMs demonstrated a relatively high energy storage density (147.6 J/g), excellent form stability, superior thermal management performance, and remarkable flexibility (tensile stress up to 1000 kPa). Additionally, the incorporation of single-layer Ti3C2Tx MXenes significantly enhanced the solar-thermal conversion efficiency (up to 86.94%) and improved the motion detection sensitivity of the PCM films. The FPPMs can be employed as a strain sensor to detect various human motions, including facial expression, wrist bend, elbow bend, and finger bend.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yi-Xuan Fan,Juan-Juan Yang,Huan-Huan Wang,Zhuo-Ying Yang,Hao Yu
A gold nanoparticle (AuNP)-Ti 3 C 2 T x -MXene-poly(diallyldimethylammonium chloride) (PDDA)-reduced graphene oxide (rGO) composite was prepared for electrochemical detection of hexavalent chromium (Cr (VI)). Firstly, Ti 3 C 2 T x -MXene was prepared by HF etching of aluminum titanium-carbide (Ti 3 AlC 2 ), and AuNP-MXene composite was prepared by self-reduction method. Then, the PDDA functionalized rGO (PDDA-rGO) was prepared by hydrothermal reduction method. Finally, the AuNP-Ti 3 C 2 T x was assembled on PDDA-rGO by the electrostatic interaction, and an AuNP-Ti 3 C 2 T x -PDDA-rGO composite was obtained. The composition and morphology were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and Raman spectroscopy. The electrochemical behavior of Cr (VI) on the composite modified electrode was studied carefully. The results showed that PDDA-rGO can be used as a good carrier to firmly load AuNP-Ti 3 C 2 T x by electrostatic interaction. The simultaneous introduction of AuNP and Ti 3 C 2 T x enhanced the electrochemical activity of the composite. Under the synergistic action of various components, the composite showed strong catalytic activity for the electrochemical reduction of Cr(VI). The linear range of amperometric detection of Cr(VI) was 2.0 × 10 −8 –1.1 × 10 −5 mol/L and 1.1 × 10 −5 –3.9 × 10 −4 mol/L. respectively. The detection limit is 1.0 × 10 −8 mol/L (S/N = 3). The composite electrode had the characteristics of low detection limit, high sensitivity and wide linear range, and can be used for quantitative determination of Cr (VI) in water samples.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Bofei Zhang,Ke Zhao,Baozhong Zhang,Boxu Chen,Kunfeng Zhang,Hanyu Chen,Baoshan He
A dual-mode (colorimetric/electrochemical) aptasensor was developed for ZEN detection. • Au@Ti 3 C 2 T x MXene@MoSe 2 was synthesized to enhance electrode conductivity and surface area. • RCA was integrated to generate G-quadruplexes for both electrochemical and colorimetric readouts. • Electrochemical mode achieved 1.23 fg/mL LOD; colorimetric mode enabled convenient visual screening. • The sensor exhibited excellent selectivity, stability, and recoveries (89.6–106.2%) in real samples. Zearalenone (ZEN), a nonsteroidal mycotoxin produced by Fusarium fungi, widely contaminates cereals and their derived products, posing a serious threat to human health. In this study, a highly sensitive dual-mode (colorimetric and electrochemical) aptasensor for ZEN was constructed. The sensor employs rolling circle amplification (RCA) to efficiently generate long single-stranded DNA rich in G-quadruplex sequences, combined with an electrode modified with an Au@Ti 3 C 2 T x MXene@MoSe 2 nanocomposite, thereby achieving synergistic signal amplification and dual readout. In the electrochemical mode, the RCA product is anchored through hybridization between the primer and the capture probe on the electrode surface, where it adsorbs abundant methylene blue to produce a square wave voltammetry (SWV) response. In the colorimetric mode, the G-quadruplex structures self-assemble with hemin to form peroxidase-mimicking DNAzymes, which catalyze the TMB chromogenic reaction to generate a visual signal. Experimental results showed that the electrochemical mode achieved a detection limit as low as 1.23 fg/mL (detection range: 10 −3 -10 4 pg/mL), while the colorimetric mode exhibited a detection limit of 64.89 fg/mL (detection range: 1 pM-10 μM). The aptasensor demonstrated excellent selectivity, good stability, and satisfactory reproducibility for ZEN, with spiked recoveries ranging from 89.6% to 106.2% in real corn flour and beer samples. This dual-mode sensing platform effectively eliminates single-mode interferences through signal cross-validation, providing a reliable technical means for the accurate and rapid detection of trace ZEN in food safety. Download: Download high-res image (117KB) Download: Download full-size image
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Guanshun Xie,Le Liao,Zhaohui Huang,Jie Wang,Senlin Zhang,Kunjie Wang,Ruoning Zhan,Peng Zhang,Benhua Xu,Xiuqiang Xie,Nan Zhang
In pursuing efficient photocatalytic systems, nature-inspired photocatalysis has emerged as a promising strategy to optimize charge transfer and surface reactions. Inspired by the structure and function of plant leaves, a leaf-like hierarchical heterostructure is constructed. ZnIn 2 S 4 nanosheet arrays are anchored on the integrated Ag nanowires network with Ti 3 C 2 T x MXene support, during which process sulfur vacancies (V S ) are formed due to the anti-strong metal-support interaction. The ZnIn 2 S 4 nanosheet arrays supported by Ti 3 C 2 T x serve as mesophyll to absorb photons and convert solar-to-chemicals, the Ag nanowires embedded in the interface of ZnIn 2 S 4 and Ti 3 C 2 T x function as veins to shuttle the charge carriers for the surface redox reactions, and the V S on ZnIn 2 S 4 resemble stomata to facilitate the adsorption of reactants. Furthermore, the formed V S are able to reduce the thermodynamic barriers in photocatalytic reactions. The synergistic effect of these functional components enables hydrogenation of several nitroaromatic compounds, and exhibits a photocatalytic H 2 evolution rate of 1119.4 µmol g⁻¹ h⁻¹ under visible-light irradiation, which is ≈7.9 times as high as that of pure ZnIn 2 S 4 . This study highlights the pivotal role of functional design inspired by nature in advancing solar-to-chemical conversion and paves the way for the development of next-generation photocatalysts in green chemistry and H 2 energy applications.
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Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 41
·22278-22288
·
IF 14.511
Junji Chen,Wenjing Qin,Kun Li,Lei Feng,Jianxing Chen,Hanying Qiao,Min Yang,Zhenhao Tian,Xinxin Li,Changshun Gu,Yanli Wang,Zheng Gong,Shougen Yin
Ti3C2Tx MXene has a high specific surface area and high conductivity, and can be used in the field of humidity sensing. By controlling the surface termination and microstructure of the material, it is expected to improve the humidity sensing performance of Ti3C2Tx MXene. In this paper, we report a method of electrolytic intercalation treatment of Ti3C2Tx MXene in NaOH solution. Theoretical and experimental results show that this method can remove the original F terminations from the surface of Ti3C2Tx MXene and form a large number of OH and O terminations. The partial oxidation of the surface and the replacement of terminations and the insertion of Na+ lead to the change of the Ti3C2Tx MXene layer morphology from flat to curly and significantly improve the hydrophilicity and resistance. The curly flake structure constructs a fast channel for the entry and exit of water molecules which improves the hydration/dehydration efficiency of the material; the enhanced hydrophilicity of the material sharply reduces the resistance of the material after moisture absorption, which significantly improves the responsiveness of Ti3C2Tx MXene to humidity. The curly flake Ti3C2Tx MXene humidity sensor has an ultra-high sensitivity of S = 1.2 × 105 (two orders of magnitude higher than that of the reported humidity sensor based on MXene), with a fast response rate (2 s), good repeatability and stability (4 weeks), and it can be used for the analysis of human respiration rate, and also for non-contact sensing detection of the human body and environmental humidity detection.
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DESALINATION
·
2023
·
IF 9.9
Tingting Xie,Yuanyuan Wang,Qian Zhang,Weijia Guo,Shunyu Shen,Qian Wang,Xin Chen,Lijie Qu,Caicai Li
Exploring an efficient and stable adsorbent material for purification of toxic heavy metal ions wastewater is of great significance. However, as a typical heavy metal ions adsorbent, titanate can still improve in material synthesis, adsorption efficiency and the recyclability . Herein, a novel titanate-based adsorbent which composing of Ti 3 C 2 T x MXene-derived hydroxy-rich titanate and cellulose was fabricated for efficient removal of toxic heavy metal ions. Owing to the similar stratified structure, the conversion from Ti 3 C 2 T x MXene to titanate is energy-saving and easy to achieve. In addition, the inherited hydroxy-rich property is beneficial to improve the adsorption efficiency of the derived titanate. Furthermore, the introduction of cellulose as a structural regulator to fabricate the titanate/cellulose membrane could greatly alleviate the problem of difficult recycling of powder adsorbent. Thus, the constructed Ti 3 C 2 T x -derived hydroxy-rich titanate/cellulose membrane adsorbent (M-NTO/CM) exhibits high Cu 2+ adsorption capacity of 2.63 mmol g −1 and can reach the adsorption equilibrium in only 5 min. Better yet, there has also been a significant improvement in acid resistance and recyclability of the M-NTO/CM relative to traditional titanate. In short, M-NTO/CM derived from Ti 3 C 2 T x MXene can be used as an advanced membrane for convenient and efficient purification of heavy metal ions from the wastewater.
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CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Jiaojiao Zhao,Jianhua Zhou,Hong Li,Anguo Xiao
Wearable heaters have attracted growing attention for maintaining a relatively constant temperature of the human body in cold environments with near zero energy consumption. Herein, we developed a multifunctional laminated fabric with fascinating electro/solar-thermal conversion, thermal energy storage and thermal insulation properties. With cotton fabric as the substrate, MXene/polydimethylsiloxane (PDMS) conductive network was decorated on the upper layer, and carbon nanotube (CNT)/cellulose nanofiber (CNF)/paraffin (PA) aerogel phase change composites were assembled on the bottom layer. Attributed to the strong conductivity and light absorption of MXene and the light/thermal response of CNT and PA components, this wearable laminated fabric broke the limitation of intermittent solar photothermal heating, and integrated multiple heating modes to precisely heat the human body. Meanwhile, the low thermal conductivity of aerogel retarded heat loss. The laminated fabric can help people better adapt to a variety of complex and changeable environments such as cold winter, rainy days and nights. This study provides a promising and energy-efficient avenue for the development of all-day personal thermal management fabrics.
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