ANALYST
·
2024
·Vol. 149
·期 15
·3951-3960
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IF 3.6
Qiuying Wang,Ruiqing Jiu,Yunyao Wang,Zongda Li,Jianan Chen,Haochi Liu,Jifeng Liu,Jia Cao
Safety problems caused by organophosphorus pesticide (OP) residues are constantly occurring, so the development of new methods for the degradation and detection of OPs is of great scientific significance. In the present study, β-sheet peptides and β-hairpin peptides for catalyzing the hydrolysis of OPs were designed and synthesized. The peptide sequences with the highest hydrolytic activity (EHSGGVTVDPPLTVEHSAG) were screened by investigating the effect of the location of the active sites of the peptide and the peptide's structure on the degradation of OPs. In addition, the relationship between the peptides’ conformation and hydrolytic activity was further analyzed based on density functional theory calculations. The noncovalent interactions of the peptides with the OPs and the electrostatic potential on the molecular surface and molecular docking properties were also investigated. It was found that peptides with approximate active amino acids consisting of the catalytic triad and with the hairpin structure had enhanced hydrolytic activity toward the hydrolysis of OPs. To develop an electrochemical sensor technique to detect OPs, the conductive MXene (Ti3C2) material was first immobilized with a caffeic acid monolayer via enediol–metal complex chemistry and then bound with the β-hairpin peptide (EHSGGVTVDPPLTVEHSAG) via carboxy–amine condensation chemistry between the –COOH of caffeic acid and the –NH2 of the peptide to prepare a MXene–peptide composite. Then, the prepared composite was modified on the surface of a glassy carbon electrode to construct an electrochemical sensor for the detection of OPs. The developed technique could be used to monitor OPs within 15 min with a two orders of linear working range and with a detection limit of 0.15 μM. Meanwhile, the sensor showed good reliability for the detection of OPs in real vegetables.
研究领域:
生物化学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Chao Li,Tongtong Yun,Yehan Tao,Jie Lu,Chaoxu Li,Jian Du,Haisong Wang
Incorporating biopolymers into two-dimensional transition metal carbides and/or nitrides (2D MXene) has been demonstrated as an effective strategy to improve the mechanical behaviors of MXene-based composites. However, the insulate nature of biopolymers inevitably deteriorated the electrical conductivity and the sensitivity of assembled sensors. Herein, a novel cellulose nanofiber (CNF)/MXene/carbon black (CB) composite was demonstrated as the conductive layer in eco-friendly cellulose paper-based sensors by intercalating the CB into the MXene/CNF interlayer, followed by coating hydrophobic SiO 2 for encapsulation. Befitting from the high-density crack-microstructures between CB and MXene, the fabricated superhydrophobic paper CB/CNF/MXene/SiO 2 sensor delivered ultrahigh sensitivity of 729.52 kPa −1 , low detect limit of 0.29 Pa, rapid response time of 80 ms and excellent stability over 10,000 cycles. Moreover, the fabricated sensor was capable of detecting the physiological parameter of human ( e.g. huge/subtle movements) and spatial pressure distribution. Furthermore, the presence of SiO 2 layer endowed the sensor with superhydrophobic performance (water contact angle ∼158.2 o ) and stable electrical signals under high moisture conditions or even under water. Our work proposed a novel strategy to boost the sensitivity of MXene-based conductive layer in flexible electronic devices.
研究领域:
材料科学
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电子工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Chong Cai,Ran Wang,Shufeng Liu,Xiaoya Yan,Lexin Zhang,Mingli Wang,Qi Tong,Tifeng Jiao
In recent years, new family of two-dimensional (2D) transition metal carbide and carbonitrides-MXene has become critical materials due to their excellent structure and performance. Herein, we have investigated the synthesis of a new MXene-based composite material for efficient dye adsorption in sewage treatment, via a facile hydrothermal method . The characterization of the phytic acid (PA)-MXene composites showed that new rod-like Ti(OH)PO 4 components appeared in the hydrothermal process. In addition, compared with the original MXene , the prepared PA-MXene composite exhibited enhanced adsorption properties for the model dyes MB and RhB, and the adsorption capacity of the PA-MXene composite on MB remained at about 85 % after 12 cycles, indicating important potential as an adsorbent material in wastewater treatment .
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
RADIOCHIMICA ACTA
·
2022
·Vol. 110
·期 5
·311-322
·
IF 2.083
Yun Zhou,Huai-Xin Hao,Tian-Hao Dong,Xu-Feng Ni,Yi-Chen Hu,Jia-Ju Ma,Jun-Qiang Yang,Ke-Liang Shi,Guo-Jian Duan,Tong-Huan Liu
With the rapid development of nuclear energy, how to safely and efficiently dispose of radioactive waste solution has become an urgent environmental problem of public concern. It is of great significance to construct a new type of high-efficiency adsorbent material to recover uranium from nuclear waste solution. In this work, the Ti 3 C 2 T x material (an emerging two-dimensional inorganic layered material) with a stable layered structure was used as the matrix, and the amidoxime functionalized MXene composite material (PAO/Ti 3 C 2 T x ) was synthesized by in-situ polymerization. The amidoxime-functionalized Ti 3 C 2 T x showed excellent capacity to capture U(VI), with a maximum adsorption capacity of 98.04 mg/g at 25 °C, which was significantly better than that of Ti 3 C 2 T x , and the adsorption selectivity for U(VI) was greatly improved. The adsorption was conformed to Langmuir isotherm model and pseudo-second-order kinetic model. In addition, the adsorbed UO22+ could be effectively desorbed by 0.1 M HNO3, and the adsorption performance of PAO/Ti 3 C 2 T x did not decrease significantly after 5 adsorption/desorption cycles. The results of ionic strength experiment, FT-IR, SEM, and XPS jointly indicated that adsorption mechanism of U(VI) on PAO/Ti 3 C 2 T x was the combined effect of the amidoxime group and -O and -OH active groups on the surface of Ti 3 C 2 T x , mainly inner complexation. These advantages make PAO/Ti 3 C 2 T x composite a highly potential U(VI) adsorbent with great application prospects.
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
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
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Lili Zhu,Yutong Cao,Bai Jiang,Junrong Yu,Jing Zhu,Zuming Hu
Incorporating compressibility , elasticity, and porous structures into microwave- absorbing materials will facilitate electromagnetic wave absorption (EMA) and improve environmental adaptability for practical applications. Herein, a strategy to prepare Ti 3 C 2 T x MXene/reduced graphene oxide (RGO)/ cellulose nanocrystals (CNCs) aerogels via a directed freezing method to design three-dimensional structures and strengthen the interaction between Ti 3 C 2 T x MXene and RGO lamellae is demonstrated. Oriented structures and the addition of CNCs benefit structural stability while achieving superior absorption performance by forming perfect impedance matching and multiple polarization effects. Interestingly, the prepared MXene/RGO/CNCs (MRC-20) aerogel delivers the prominent EMA performance in reported MXene-based absorbing materials, with a minimal reflection loss (RL min ) of − 72.32 dB at 12.0 GHz corresponding to a matching thickness of 2.56 mm and an effective absorption bandwidth (EAB) of 4.96 GHz at 1.88 mm with an RL min of − 59.87 GHz. Furthermore, by tuning the content of CNCs, the MRC-20 aerogel exhibits the highest stress (37.2 kPa) at 70% compressive strain and demonstrates the stability of the compression cycle. These intriguing features make the hybrid aerogel stand out among numerous absorbers.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zeyi Wang,Xuejie Zou,Zhiwei Yang,Jian Wang,Qian Chen,Chengjie Pei,Zhiwei Wang,Mengwei Dong,Jian Zhang,Hai Li,Xiao Huang
Wearable temperature sensors with high sensitivity and stability hold great potential for human health monitoring. However, hydrogels, which are commonly used for wearable devices, often show poor thermal and electrical conductivity and are susceptible to dehydration and freezing. Herein, we developed a frost- and dehydration-resistive temperature sensor based on Fe2+/Ti2CTx/κ-carrageenan (CA)-polyacrylamide (PAM) hydrogel. The Fe2+ ions within the hydrogel existed in two forms: as free ions and bonded ions. The free Fe2+ ions could complex with water molecules, resulting in the improved resistance to dehydration and freezing, as well as enhanced ionic conductivity in the hydrogel. On the other hand, the remaining Fe2+ ions acted as linkers to form coordination bonds with the sulfate groups of CA chains, resulting in the greatly enhanced mechanical strength of the hydrogel. In addition, the Ti2CTx nanosheet-based fillers formed a well-defined porous laminar structure, which reduced the phonon scattering and improved the phonon adsorption within the hydrogel. The Fe2+/Ti2CTx/CA-PAM hydrogel sensor exhibited excellent temperature sensing performance including a good linearity (R2 = 0.998) within a broad working range (−10 to 60 °C), high resolution (0.1 °C), and good repeatability. Furthermore, the sensor was integrated into a wireless system for continuous monitoring of body temperature, demonstrating its potential in healthcare monitoring, electronic skins, and intelligent robots.
研究领域:
材料科学
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生物医学工程
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电子皮肤
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Yuntong Wen,Hao Bian,Yongpeng Ran,Yonghao Xie,Minmin You,Huimin Wen,Liyun Shi,Jingquan Liu,Zude Lin
The 2D Ti 3 C 2 T x MXene anchored with magnetic particles has garnered significant attention due to its superior electromagnetic shielding performance and low reflection coefficient. However, current research on MXene-anchored magnetic particles faces several challenges, including complex fabrication processes, difficulty in controlling compositional ratios, the predominant use of spherical magnetic particles. In this work, by employing surfactants, FeCo alloy and Ni flakes were uniformly anchored onto MXene, the preparation process of the composite is simple and facilitates better control over the ratios of individual samples. Due to the unique structure formed by the intercalation of FeCo alloy and Ni flakes within the MXene layers, M-FC-N-35 exhibits an average electromagnetic shielding effectiveness of 61.2 dB within the Ku-band and maintains a reflection coefficient as low as 0.69. Additionally, the M-FC-N-35 composite was applied to the surface of the temperature sensor casing. It was found that under an electromagnetic field strength of 200 V/m and within a frequency range of 6–18 GHz, the temperature measurement deviation was reduced to 9.35 % of that of the sensor without the shielding material, demonstrating high electromagnetic interference resistance. This work provides guidance for simplifying the fabrication process of MXene composites with magnetic metals and enriching the system of electromagnetic shielding materials.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 12
·859
·
IF 3.8
Lingji Zhang,Mengke Shi,Shuo Zhang,Feng Yue,Cairong Yang,Yang Meng,Wen Li,Cong Li,Mario Berrettoni,Silvia Zamponi,Yongpeng Ma,Hongzhong Zhang
In response to growing concerns about the greenhouse effect, the direct conversion of atmospheric CO2has become a pivotal research focus. This research utilizes hydrothermal synthesis to develop Bi2WO6/MXene(Ti3C2Tx), which efficiently reduces CO2directly at the gas–solid interface through photothermal synergy, without requiring additional sacrificial agents or alkaline absorption solutions. The results indicate that the CO formation rate is about 216.9 μmol·g−1h−1. Notably, this system demonstrates exceptional selectivity for reducing CO2to CO. The outstanding photothermal catalytic efficiency is attributed to the introduction of MXene, which serves as an efficient and economical co-catalyst. The integration of MXene improves the composite material’s specific surface area and pore structure, enhances its CO2adsorption capacity, and results in the Bi2WO6/MXene hybrid having a shorter charge transfer distance and a larger interface contact area. This ensures superior charge transfer capabilities, ultimately leading to a significant enhancement in the catalytic efficiency of the composite. This study presents a straightforward and highly selective method for capturing and converting atmospheric CO2, offering fresh insights for developing efficient photothermal catalytic materials.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2021
·
IF 7.664
Enxiang Jiao,Kun Wu,Yingchun Liu,Maoping Lu,Hangzhen Zhang,Haoting Zheng,Chang-an Xu,Jun Shi,Mangeng Lu
A flexible cellulose nanofibers/MXene@Ag film with nacre-like structure is constructed by a facile vacuum-assisted filtration process. The composite film shows an outstanding thermal conductivity of 22.43 W m −1 K −1 at 30 wt% MXene@Ag loading, which enhances 769% relative to the pure CNFs film. This is mainly due to the bridging effect of silver nanoparticles can greatly reduce the interface thermal resistance between MXene nanosheets in the CNFs matrix. Particularly, the CNF/MXene film present a typical biomimetic nacre-like structure, which resulting in the satisfactory mechanical properties with a tensile strength of 71.4 ± 2.8 MPa and a toughness of 1.0 ± 0.06 MJ m −3 . Moreover, the composite film exhibits excellent photothermal properties that the surface temperature of the CNF/MXene@Ag film can rose to ~48 °C after 210 s of 55 W light irradiation. Hence, our work provides a facial method for preparation of multifunctional thermal management film.
研究领域:
材料科学
·
生物仿生学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Zhongming Li,Dong Feng,Bin Li,Delong Xie,Yi Mei
Wearable sensors with a three-dimensional (3D) structural design and electromagnetic shielding performance are significant for the future development of wearable electronic devices. However, it remains a challenge to achieve the target goals. Herein, the thermoplastic polyurethane (TPU)/Ti 3 C 2 T x (MXene)/MnFe 2 O 4 /Multi-walled carbon nanotubes (MWCNTs) ( i.e ., TMMM) composites were innovatively designed using parametric Voronoi structure with different pore sizes and porosity upon fused deposition molding (FDM) printing. The two-dimensional (2D) MXene/zero-dimensional (0D) MnFe 2 O 4 hybrid fillers were built initially by electrostatic bonding strategy, followed by adding the one-dimensional (1D) MWCNTs as a conductive bridging agent, this way endowed the nanofillers with different dimensions uniformly dispersed to form a superb conductive network structure in the TPU matrix. When applied as pressure sensors , the TMMM composites exhibited adjustable gauge factor (GF = 1.33–3.73), extensive sensing compression range (∼89% strain with 12.03 MPa stress), good durability (6000s cyclic compression), which was very conducive to monitoring human motion, such as finger bending, wrist bending, speech recognition, etc . The sensing mechanisms were also studied using the Finite element simulations , and the variation trend of resistance change was in good agreement with the simulation results. The average electromagnetic interference shielding efficiency (EMI SE) value of the 2.1 mm-thick printed composite reached 31.2 dB , suggesting that 99.9242% of electromagnetic waves can be shielded. The proposed strategy not only provided a solution to reduce the weight of electromagnetic shielding materials , but also provided an efficient method for developing porous 3D printed parts with adjustable sensing properties at the macroscopic scale towards wearable electronic devices.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2022
·
IF 4.291
Yunjing Zhu,Yunlei Ma,Dandan Wu,Guojian Jiang
In this paper, ZnO/Ti 3 C 2 T x composites containing different proportions of Ti 3 C 2 T x were synthesized by hydrothermal method . The effects of different proportions of MXene content on the gas sensing properties of ZnO/Ti 3 C 2 T x composites were studied. It is found that ZnO/Ti 3 C 2 T x composites show a good response to acetone and excellent reversibility and the ZnO/Ti 3 C 2 T x composites containing 2 wt% Ti 3 C 2 T x had the highest response to acetone. The gas-sensing performance of ZnO/multi-layer MXene and ZnO/few-layer MXene were compared. The results showed that ZnO/Ti 3 C 2 T x composites with few-layer MXene had a higher response to acetone, 14.4, indicating that the few-layer MXene solution has better dispersion for ZnO and gas-sensing properties. Finally, the gas sensing mechanism of few-layer MXene/ZnO was suggest.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）