JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 9
·6168-6177
·
IF 2.779
Chen Pu,Zhao Zhihua,Shao Zhigang,Tian Ye,Li Bo,Huang Bo,Zhang Shuaiwen,Liu Chunbo,Shen Xiaoqing
Semiconducting nanomaterials with different sizes and shapes have wide applications in the field of electronics, and one of the key pathway to improve their performance is by recombination of different materials. In our innovative work, the nanocomposites of polypyrrole (PPy) and MXene were prepared by a simple in situ polymerization reaction. The samples were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The samples were made into sensors, and the gas sensitivities of the materials were investigated under different test conditions. The results showed that the response value of PPy/MXene-12 sensor to 100 ppm ammonia at room temperature was 2.38 times than that of pure PPy and 6.38 times than that of pure MXene. In addition, the sensor has excellent selectivity and low detection limit, which demonstrate the excellent practicability of them in the field of Internet of Things (IoT).
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Xi Wang,Yong Wang,Yiyu Wu,Yunmiao Fan,Yang Tian
Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) solid garnet-type electrolyte has been widely reported due to its outstanding safety and electrochemical stability. However, the inherent rigidity and brittleness of LLZTO lead to poor contact with anode/cathode and the operation failure of full cells. Herein, the dual-interlayers are constructed as the fast interfacial ion-migration channel by using Ti 3 C 2 T x (MXene, T x is –O, –OH, –F) with trace ionic liquid (IL), which promote the intimate contact between LLZTO and anode/cathode and suppress Li-dendrites growth. Notably, IL can wet the cathode to promote intimate interface contact and be decomposed into some inorganic compounds (such as Li 3 N, LiF, and Li 2 S x ), resulting in reduced interfacial resistance and fast Li-ion transportation. Consequently, in the prepared Li-symmetric cell, the interfacial resistance on the anode side plunges to 33.1 Ω cm −2 , and stably maintains over 1000 h without short circuit at 0.05 mA cm −2 . The full cell of Li|LiFePO 4 delivers a high initial capacity of 158.52 mA h g −1 and outstanding retention of 90.18% after 100 cycles at 60 °C and 0.2 C. Our work provides an efficient strategy to design dual-interlayers between LLZTO and anode/cathode for the interfacial modification to enhance the performance of solid garnet batteries.
研究领域:
材料科学
·
电化学
·
固态电池
·
界面工程
·
能源材料
✓ 已验证
DOI
高影响因子
Nanoscale Horizons
·
2026
·
IF 6.4
Jingxiao Liu,Zhaoyang Su,JingYue Xuan,Liubing Fan,Fangfang Gao,Xuan Zhao,Qingliang Liao,Yue Zhang
Electrophysiological signals, generated from the directional transport of ions across cellular membranes, encode vital physiological information relevant to human health status. Electrophysiological signal monitoring serves as a critical approach for deciphering fundamental physiological processes and enabling precise disease diagnostics. Bioelectrodes are indispensable components for the acquisition of high-fidelity electrophysiological signals. However, sweat inevitably accumulates at the skin–electrode interface during continuous monitoring, which may irritate the skin or cause the electrodes to detach from the skin, affecting the acquisition of high-quality electrophysiological signals. A key challenge in ensuring the long-term utility of bioelectrodes lies in enhancing their breathability without impeding electrophysiological signal transmission. Therefore, we realized Ti3C2Tx edge passivation by NaAsc and the preservation time at room temperature was increased to 30 days. On this basis, an antioxidant Ti3C2Tx bioelectrode with high air permeability and biocompatibility was proposed. The bioelectrode has an excellent gas permeability of 1408.89 g m−2 d−1 and a low skin–electrode interface impedance of 1.83 × 105 Ω at 10 Hz. Moreover, the signal-to-noise ratio of the electromyography signal is 19.4 dB and the T/R wave intensity ratio of the electrocardiography signal is 0.4079, which is superior to that of the Ag/AgCl gel electrode. The bioelectrode with these optimized attributes enables stable, long-term monitoring of multiple electrophysiological modalities and excellent skin biocompatibility, providing a new approach for constructing a health monitoring and smart medical system.
✓ 已验证
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 6
·958
·
IF 5.3
Xiaofang Liu,Hongchi Xie,Shi Zhuo,Yuanhong Zhou,Mohamed S. Selim,Xiang Chen,Zhifeng Hao
For a long time, the emergence of microbial drug resistance due to the abuse of antibiotics has greatly reduced the therapeutic effect of many existing antibiotics. This makes the development of new antimicrobial materials urgent. Light-assisted antimicrobial therapy is an alternative to antibiotic therapy due to its high antimicrobial efficiency and non-resistance. Here, we develop a nanocomposite material (Ru@MXene) which is based on Ru(bpy)(dcb)2+connected to MXene nanosheets by ester bonding as a photothermal/photodynamic synergistic antibacterial material. The obtained Ru@MXene nanocomposites exhibit a strengthened antimicrobial capacity compared to Ru or MXene alone, which can be attributed to the higher reactive oxygen species (ROS) yield and the thermal effect. Once exposed to a xenon lamp, Ru@MXene promptly achieved almost 100% bactericidal activity againstEscherichia coli(200 μg/mL) andStaphylococcus aureus(100 μg/mL). This is ascribed to its synergistic photothermal therapy (PTT) and photodynamic therapy (PDT) capabilities. Consequently, the innovative Ru@MXene can be a prospective non-drug antimicrobial therapy that avoids antibiotic resistance in practice. Notably, this high-efficiency PTT/PDT synergistic antimicrobial material by bonding Ru complexes to MXene is the first such reported model. However, the toxic effects of Ru@MXene materials need to be studied to evaluate them for further medical applications.Keywords:MXene;Ru complex;PTT/PDT;antimicrobial
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 6
·1330
·
IF 5
Kun Hou,Yafeng Yang,Hu Zhou,Xiangmeng Chen,Shengbo Ge
Water pollution has spurred the development of membrane separation technology as a potential means of solving the issue. In contrast to the irregular and asymmetric holes that are easily made during the fabrication of organic polymer membranes, forming regular transport channels is essential. This necessitates the use of large-size, two-dimensional materials that can enhance membrane separation performance. However, some limitations regarding yield are associated with preparing large-sized MXene polymer-based nanosheets, which restrict their large-scale application. Here, we propose a combination of wet etching and cyclic ultrasonic-centrifugal separation to meet the needs of the large-scale production of MXene polymers nanosheets. It was found that the yield of large-sized Ti3C2TxMXene polymers nanosheets reached 71.37%, which was 2.14 times and 1.77 times higher than that prepared with continuous ultrasonication for 10 min and 60 min, respectively. The size of the Ti3C2TxMXene polymers nanosheets was maintained at the micron level with the help of the cyclic ultrasonic-centrifugal separation technology. In addition, certain advantages of water purification were evident due to the possibility of attaining the pure water flux of 36.5 kg m−2h−1bar−1for the Ti3C2TxMXene membrane prepared with cyclic ultrasonic-centrifugal separation. This simple method provided a convenient way for the scale-up production of Ti3C2TxMXene polymers nanosheets.Keywords:Ti3C2TxMXene;yield;polymers nanosheets;cyclic ultrasonic-centrifugal separation
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Na Chu,Chunjia Luo,Xushuai Chen,Liuxin Li,Chaobo Liang,Min Chao,Luke Yan
With the development of electronic products to miniaturization and high frequency, high-performance flexible electromagnetic interference (EMI) shielding materials are urgently needed to deal with electromagnetic pollution. Two-dimensional transition metal carbide/polyimide (Ti 3 C 2 T x MXene/PI) films were synthesized by in situ polymerization and a simple scratch method in this paper. The Ti 3 C 2 T x MXene nanosheets give the films good EMI shielding effectiveness (SE) and electrical conductivity . Specifically, the film with a thickness of 0.11 mm (Ti 3 C 2 T x content of 30 wt%) exhibits an EMI SE of 34.73 dB and a specific EMI SE (SE/thickness) of 315.73 dB/mm in the frequency range of 8.2–12.4 GHz (X-band). In addition, the films have a tensile strength of 67.58 MPa, and a high decomposition temperature of 510 ℃ in N 2 atmosphere. Therefore, we believe that the prepared Ti 3 C 2 T x /PI films with good comprehensive performance have enormous potential in the field of lightweight and flexible EMI shielding materials.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xu Gao,Ming Hao,Qi Tan,Junxia Wang,Yujing Li,Jitun Chen,Wenbin Sun,Yuxin Li
Electromagnetic waves at the X band (8.2–12.4 GHz) play significant roles in military applications such as radar, satellite, and wireless communication. However, within this band range, the developed performance of electromagnetic absorption (EMA) is still unsatisfied, and it is hard to settle the corresponding problems on radar stealth and electromagnetic pollution. Herein, we demonstrate a state-of-the-art EMA property of −82.6 dB at 8.24 GHz with 2.57 mm thickness and 30 wt % paraffin filling ratio. For this purpose, an optimal Co@NCS/Ti3C2Tx composite is prepared by an electrostatic self-assembly approach through compelling Co-loading of nitrogen-doped carbon sheets (Co@NCS) derived from the pyrolysis of ZIF-67 (CoZn) with 2D Ti3C2Tx MXene nanosheets. Experimental results show that the highly efficient EMA performance of this Co@NCS/Ti3C2Tx composite originates from the large surface area for multiple reflection and electromagnetic wave scattering, from abundant defects sites for dipole and interfacial polarization, and from the optimizing impedance matching by the combination of Co magnetic nanoparticles and conductive NCS/Ti3C2Tx composite. These results confirm that the as-fabricated composites possess scientific and practical values for EMA applications at the X band, paving the way for developing highly performant electromagnetic absorbers toward specific microwave bands.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Yin Zhang,Yanping Huang,Bingqun Lin,Zupeng Chen,Xinwu Xu,Mingzhu Pan
Photocatalytic degradation is an eco-friendly technology for volatile organic compound (VOC) removal, but searching for a highly efficient photocatalyst system remains a challenge. Here, a novel photocatalyst , ZnO/Ti 3 C 2 T X composite, was developed by the electrostatic deposition strategy, wherein Ti 3 C 2 T X nanosheets serve as a support to provide abundant surface-active sites for loading ZnO spheres and adsorbing VOC molecules. Furthermore, successive catalytic centers are formed to enlarge the photocatalytic reaction interface , thereby minimizing the photogenerated electron transfer distances. Moreover, a Schottky heterojunction was successfully formed between the ZnO spheres and Ti 3 C 2 T X nanosheets , which further suppressed the recombination of photogenerated electron–hole pairs. As a result, the ZnO/Ti 3 C 2 T X composite exhibited enhanced photocatalytic activity , universality and stability in VOCs degradation. The photodegradation efficiencies of formaldehyde, methyl alcohol and acetone were as high as 91 %, 84 % and 80 % by ZnO/Ti 3 C 2 T X composite, respectively. The pseudo-first-order kinetic constant of formaldehyde decomposition on ZnO/Ti 3 C 2 T X was 2.69 times greater than that on pristine ZnO. This work presents a novel photocatalyst system of ZnO/Ti 3 C 2 T X composite and provides an insight for the development of highly efficient photocatalysts for the degradation of VOCs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Beibei Ma,Fu Chen,Yongzhi Cheng,Xian Wang,Shuoqing Yan,Rongzhou Gong,Hui Luo
High-performance microwave absorption materials are considered to be an effective solution to the increasing electromagnetic pollution. In this work, Ti 3 C 2 T x MXene@NiFe-layered double hydroxide (NiFe-LDH) derived multi-interfacial FeNi 3 /TiN@nitrogen-doped carbon (NC)@magnetic multiwalled carbon nanotube composites were prepared by a hydrothermal process and subsequent carbothermal reduction. The phase compositions, morphology, defects and electromagnetic parameters of the composites can be regulated by the thermal treatment temperature. The reflection loss value of the composite with a thickness of only 1.6 mm can reach − 43.75 dB when the heat treatment temperature is 900 °C, and the effective absorption bandwidth is 5.5 GHz with a thickness of 2.12 mm when the heat treatment temperature is 700 °C. The synergistic effects among the associated dielectric loss, magnetic loss and the impedance matching of the samples are also systematically investigated. This work provides a new perspective and an effective approach for acquiring MXene hybrids derived high-performance microwave absorbing materials.
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Chengwen Huang,Jingyu Tian,Song Yang,Yujun Zhao,Huangzhong Yu
The Ti 3 C 2 T x , as a typical representative of the MXene family, has attracted much attention due to excellent properties in terms of transmittance, conductivity, tunable work function (WF), and low temperature solution processability . However, the work function that needs to be adjusted and a large number of crystal defects in Ti 3 C 2 T x greatly restrict its use in electronic devices. Herein, Ti 3 C 2 T x is modified with amino acids to modulate WF of Ti 3 C 2 T x and passivate its defect sites , thereby improving the electrical properties of Ti 3 C 2 T x and enhancing the performance of organic solar cells (OSCs). Amino acids interact with Ti 3 C 2 T x by charge transfer and forming a surface dipole on the surface, which reduces the WF of Ti 3 C 2 T x . Moreover, -NH 2 of amino acids passivates the negatively charged Ti vacancies in Ti 3 C 2 T x , while -COOH of amino acids passivates the positively charged C vacancies, increasing the conductivity of Ti 3 C 2 T x . Consequently, the OSCs with amino acid-modified Ti 3 C 2 T x -based as new electron transport layer (ETL) exhibit more than 18% of power conversion efficiency (PCE) and good device stability. The work shows OSCs with high performance can be fabricated by using environmental-friendly amino acids, which inspires researchers to seek ideas for fabricating efficient devices from natural materials.
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2023
·Vol. 13
·期 8
·1234
·
IF 2.7
Zhiwei Liu,Zhaobo Liu,Guanlong Li,Yan Zhao,Kai Wang,Xiangbao Chen
At present, the rapid development of electronic devices such as batteries, sensors, capacitors and so on is creating a huge demand for lightweight materials with a designed structure and function. Ti3C2TxMXene, a lightweight two-dimensional (2D) nanomaterial with excellent electronic properties, has been favored in this field. In this work, Ti3C2TxMXene was annealed under an inert gas (N2, Ar and CO2) atmosphere to design the crystal structure and interface of the nanosheets, and then the modified nanosheets with specific changes in dielectric properties were obtained. Among them, the key temperature points (100 °C, 300 °C, 500 °C and 800 °C) in the thermogravimetric (TG) test under an air atmosphere were used as the annealing temperature. When annealing under an air atmosphere, with the increase in temperature, the Ti layer gradually oxidized and evaporated, and the original two-dimensional structure was partly destroyed with some of the C atoms reacting with O2to form CO2. In the inert gas atmosphere, however, the 2D structure is preserved, except that the surface end groups and layer spacing are changed. In addition, some N element doping was introduced into the nanosheets after N2atmosphere treatment, which changed the original lattice structure. After the Ar atmosphere treatment, some Ti atoms on the surface were oxidized in situ to form TiO2grains with different crystal forms, which increased the interfacial area. The C-TiO2structure of the nanosheets was more complete after treatment with the CO2atmosphere. All the nanosheets after heat treatment with an inert gas atmosphere retained the characteristic morphology of 2D materials, and different changes in the micro-structure caused changes in dielectric properties, thereby meeting the needs of 2D nanomaterials Ti3C2TxMXene in different scenarios.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yanan Li,Haiyu Luo,Wenlan Ji,Shuming Li,Pei Nian,Nan Xu,Nong Ye,Yibin Wei
Two-dimensional (2D) Ti 3 C 2 T x MXene nanosheets have been identified as promising for constructing ultrathin laminar nanostructures with nanoscale water transport channels for water purification. Herein, ZnO@Ti 3 C 2 T x MXene nanofiltration (NF) membranes were prepared via coupling ZnO nanoflowers to the Ti 3 C 2 T x MXene-based laminar nanostructure, which exhibited photocatalytic self-cleaning properties driven by visible light for enhanced organic dye removal. The physicochemical properties and NF performance with and without photocatalytic treatment were systematically characterized. The prepared ZnO@Ti 3 C 2 T x MXene NF membrane could reject 95.44% Congo red (CR) and demonstrated an excellent water permeability of 138.81 L·m −2 ·h −1 ·bar −1 (LMH/bar). In comparison to the Ti 3 C 2 T x MXene membrane and the same amount of ZnO powders, the ZnO@Ti 3 C 2 T x MXene membrane demonstrated higher photodegradation performance to 10 ppm MB. Impressively, the membrane showed an enhanced separation performance for 6 cycles with a RhB rejection > 88.48% and a permeability of 138.69 LMH/bar. Lastly, the synergistic photocatalytic mechanism of ZnO@Ti 3 C 2 T x MXene composite nanostructure was investigated. Such results may offer a novel insight for the fabrication of laminar structured Ti 3 C 2 T x MXene-based NF membranes with photocatalytic induced anti-fouling performance for enhanced dye water purification.
✓ 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）