Journal of Energy Storage
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2023
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IF 9.4
Wenyu Bai,Zhipeng Yong,Shuang Wang,Xiaodong Wang,Chenglong Li,Feng Pan,Dan Liang,Yinghe Cui,Zhe Wang
In this paper, MXene based electrode active materials and MXene cross-linked polyacrylic acid hydrogel electrolytes with high cycling performance and high specific capacitance have been successfully prepared. Polyaniline with high capacitance values has been grown on the MXene surface by in situ polymerization , which can significantly improve electrochemical properties. As the MXene surface is rich in functional groups, it can be used as a nucleation site for in situ polymerization of aniline monomers deposited. The PANI filled with MXene forms a 3D porous conductive network reducing the self-stacking of MXene and providing a large number of channels for electrolyte ions to enter MXene. The supercapacitor has been tested and assembled with good flexibility and the specific capacitance has risen to 222 F g −1 . The capacitance retention of 98.5 % after 10,000 charges and discharges is due to the improved performance of the composite material and the excellent stability of the gel electrolyte and electrodes. The above results show that the prepared electrodes and devices have promising applications in flexible wearable devices .
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Small
·
2023
·
IF 13.3
Zhiming Deng,Peizhu Jiang,Zhenguo Wang,Li Xu,Zhong-Zhen Yu,Hao-Bin Zhang
Processing transition metal carbides/nitrides (MXenes) inks into large-area functional coatings expects promising potential for electromagnetic interference (EMI) shielding and infrared stealth. However, the coating performances, especially for scalable fabrication techniques, are greatly constrained by the flake size and stacking manner of MXene. Herein, the large-area production of highly densified and oriented MXene coatings is demonstrated by engineering interfacial interactions of small MXene flakes with catecholamine molecules. The catecholamine molecules can micro-crosslink MXene nanosheets, significantly improving the ink's rheological properties. It favors the shear-induced sheet arrangement and inhibition of structural defects in the blade coating process, making it possible to achieve high orientation and densification of MXene assembly by either large-area coating or patterned printing. Interestingly, the MXene/catecholamine coating exhibits high conductivity of up to 12 247 S cm −1 and ultrahigh specific EMI shielding effectiveness of 2.0 ×10 5 dB cm 2 g −1 , obviously superior to most of the reported MXene materials. Furthermore, the regularly assembled structure also endows the MXene coatings with low infrared emissivities for infrared stealth applications. Therefore, MXene/catecholamine coatings with ultraefficient EMI shielding and low infrared emissivity prove the feasibility of applications in aerospace, military, and wearable devices.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Songjiu Han,Qirui Wu,Jundong Zhu,Jiayu Zhang,Anbang Chen,Yujia Chen,Xiaoxiang Yang,Jianren Huang,Lunhui Guan
Aerogel sensors have drawn considerable interest in the recent research world. However, simultaneously maintaining superelasticity and an outstanding piezoresistive effect under changing environmental conditions remains challenging. Here, sodium alginate (SA) was used as a bonding agent for MXene nanosheets and polydimethylsiloxane (PDMS) as a reinforcing agent to prepare SA/MXene/PDMS (SMP) composite aerogel with excellent high conductivity, mechanical elasticity, reliable thermal insulation, and good hydrophobicity. The interaction between MXene nanosheets and SA enhances the 3D network framework of the aerogel. The aerogel with a layer-support network structure prepared by the modified directional freezing method showed light weight, high sensitivity (37.43 kPa −1 ), significant reversible compression (70%) and excellent fatigue resistance (60,000 cycles). The piezoresistive sensor based on SMP composite aerogel can quickly respond to pressure/strain signals, which can be further used for pulse beating, sound detection, motion monitoring, foot posture diagnosis and human health monitoring. Additionally, the MXene aerogel sensor based on carbon material with frequency response characteristics can detect low to high frequency vibration signals, has frequency response characteristics that can detect low to high-frequency vibration signals, making it useful for rotating machinery speed detection, cantilever beam vibration detection, non-destructive testing of cantilever beams, and other engineering applications. With its the layered porous structure and the assistance of PDMS, the aerogel also exhibits larger water contact angles (119°) and extreme environmental suitability (−40 to 80 °C), performing a wide range of application potential in many fields.
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APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Hongyun Xue,Qiuyang Yan,Lu Chen,Yan Wang,Xiaofeng Xie,Jing Sun
In the research of photocatalytic removal of VOCs, the mineralization rate of organic pollutants has been ignored. High mineralization rate means the reduction of intermediates, which is more conducive to environmental protection and photocatalysts stability. In this work, we successfully compounded conductive Ti 3 C 2 with TiO 2 for photocatalytic degradation of o-xylene. The production of CO 2 by 1 % Ti 3 C 2 -TiO 2 composite was about twice than that of pure TiO 2 . The results of PL and photocurrent response showed that 1 % Ti 3 C 2 -TiO 2 composite had less carrier recombination and higher photocurrent response, which endows its stronger photocatalytic oxidation ability than TiO 2 . The in-situ infrared spectroscopy revealed that more aromatic anhydride species deposited on the TiO 2 surface and led to the less mineralization degree for TiO 2 sample. The four-cycle tests further confirmed the better stability of 1 % Ti 3 C 2 -TiO 2 sample. This work disclosed the role of Ti 3 C 2 in enhancing the mineralization of VOCs, which may provide a new perspective for the design of high-efficiency photocatalysts.
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高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xusheng Dong,Ruizheng Zhao,Bin Sun,Tengsheng Zhang,Boya Wang,Yanyan He,Tingting Gao,Dongliang Chao,Guowei Zhou
Transition metal selenides are regarded as potential sodium storage materials for their high theoretical capacity and superior electrical conductivity. However, unsatisfied cycle stability and rate capability, which is caused by its intrinsic structural instability and sluggish conversion reaction, greatly hinder the application. Herein, in-situ electrostatic attraction and selenization process are used to construct Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x composite, in which the homogeneous Ni 0.5 Co 0.5 Se 2 nanoparticles are anchored in the Ti 3 C 2 T x MXene architecture. Based on the unique confinement effect and strong chemical interface coupling, the volume expansion and aggregation of the Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode during the cycling process are effectively prevented. Furthermore, the evenly Ni 0.5 Co 0.5 Se 2 bimetallic selenides nanoparticles endow rapid charge transfer and redox kinetics due to shortened Na + diffusion distance and more accessible active sites. As a result, the as-prepared Ni 0.5 Co 0.5 Se 2 /Ti 3 C 2 T x anode exhibits long cycle stability over 1000 cycles at 2.0 A g −1 , pushing forward the construction of advanced conversion-type anode for high-performance sodium-ion batteries.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Yinan Zhao,Jiayun Chen,Xuejun Lai,Hongqiang Li,Xingrong Zeng,Changcheng Jiang,Qingtao Zeng,Kunquan Li,Zhengzhong Wu,Yunkun Qiu
The rapid development of intelligent fire protection technology puts forward higher requirements for the versatility and fire safety of aerogels . Herein, a multifunctional fire-retardant polyimide/MXene/Ag 2 Se nanowires (PMA) composite aerogel was fabricated via freeze-drying and dip-coating. The PMA aerogel demonstrated good strength and flexibility. The improved thermoelectric properties of the PM 1 A 1 aerogels were attributed to the energy filtration effect between the MXene and Ag 2 SeNW, which endowed the aerogels with accurate temperature sensing and sensitive, repeatable, and stable fire-warning performance. Even after 20 fire-warning test cycles, the trigger time was 4–8 s when exposed to the fire. Furthermore, in the vertical burning test, the PM 1 A 1 aerogel demonstrated remarkable flame retardancy with a limiting oxygen index (LOI) as high as 53% and quickly self-extinguished. Meanwhile, the peak heat release rate of the PM 1 A 1 aerogel was reduced by more than 65% compared with that of the PI aerogel . In addition, the PM 1 A 1 aerogel also represented a good performance in thermostability and thermal insulation . And the sensitive piezoresistive sensing and controllable Joule heating performance enabled the aerogels to be used in wearable devices and heat management, respectively. After coated with polydimethylsiloxane (PDMS), the obtained PDMS-coated PMA aerogel exhibited superhydrophobic and self-cleaning performance. This work provides a facile approach to fabricate PI aerogel with high fire safety and multi-functions, showing promising applications in transportation, building, firefighting, and wearable devices.
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高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 23
·2201585
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IF 10.05
Shunyong Wei,Shujie Tie,Kai Shen,Hui Sun,Xiaojia Zheng,Hao Wang,Wenqing Liang,Jihua Zou,Yixuan Huang,Lingzhi Luo,Xiangyu Zhou,Tixian Zeng,Aobo Ren,Dewei Zhao,Jiang Wu
Intrinsically high attenuation of X-rays and excellent optoelectronic properties endow Cs 3 Bi 2 I 9 with great promise for high-performance X-ray detectors. However, preparation of high quality Cs 3 Bi 2 I 9 single crystal with large area and millimeter-thick remains challenging and time-consuming. A size scalable growth technology, a mechanical sintering process, which is applicable for the integration in image detectors is proposed in this work. Compared with the Cs 3 Bi 2 I 9 wafer, the Cs 3 Bi 2 I 9 /MXene composite wafer exhibits higher carrier transfer efficiency and mobility-lifetime product through incorporation of Ti 3 C 2 T x MXene multilayer nanoflakes (MXene nanoflakes). The Cs 3 Bi 2 I 9 /MXene composite wafer X-ray detector shows an excellent linearity of X-ray response, a fast response speed, and a low limit of detection of 231 nGy air s −1 . The sensitivity of 368 µC Gy air −1 cm −2 under 120 V mm −1 is achieved, which is 15.4% enhanced over the Cs 3 Bi 2 I 9 wafer detector. The sensitivity of Cs 3 Bi 2 I 9 /MXene wafer device enhances ≈20–40% at low applied voltage regime. In addition, the Cs 3 Bi 2 I 9 /MXene wafer detector exhibits excellent operational stability after storage for 12 months in ambient air. This work provides an alternative approach for realization of next-generation high-performance perovskite X-ray detectors.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 20
·12632
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IF 6.208
Bin Chen,Lizhong Yang
Rigid polyurethane foam (RPUF) has been widely used in many fields, but its high flammability and frequent release of large amounts of toxic smoke during combustion limit its application. Hydrogel coatings, as a kind of environmentally friendly material, contain large amounts of water, which is beneficial to flame retardance of RPUF. MXene, as a two-dimensional inorganic nanomaterial, possesses a large specific surface area and good thermal stability, performing well in smoke suppression and as a physical barrier for flammable gas products and heat. Herein, to address the fire hazards of RPUF, MXene nanosheets were first grafted with double bonds, and then introduced into a polyacrylamide hydrogel system by radical polymerization to prepare MXene-based hydrogel coating (PAAm-MXene). The flame-retardant RPUF (coated RPUF) was prepared by painting the PAAm-MXene coating onto RPUF surface. The dispersion of modified MXene nanosheets (m-MXene) in hydrogels is improved compared with pristine MXene, and the addition of m-MXene contributes to the thermal stability enhancement of PAAm-MXene. Cone calorimetry, water retention test, and open flame combustion test were used to study the flame retardancy, smoke suppression, and water retention of flame-retardant RPUF. The coated RPUF exhibited significant flame retardancy, including reduced peak heat release rate (pHRR) at a maximum by 25.8%, and total heat release rate (THR) at a maximum by 24.6%, and total smoke production at a maximum by 38.9%. The results show that both MXene and m-MXene can improve the flame retardancy, smoke suppression, and water retention of hydrogels, but m-MXene has a better smoke suppression effect than MXene. That can be ascribed to the better dispersion of m-MXene than pristine MXene. The detailed performance improvement mechanisms are proposed. This work will not only improve the flame retardancy of RPUF, but also promotes the exploration of new flame-retardant strategies for RPUF.Keywords:rigid polyurethane foams;flame-retardant coating;poly acrylamide hydrogel;MXene;nanocomposites
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高影响因子
MICROCHEMICAL JOURNAL
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2022
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IF 5.304
Liang Tian,Mengyuan Jiang,Mengjie Su,Xiaoqing Cao,Qiyu Jiang,Quan Liu,Chunmei Yu
In this work, a highly selective and sensitive cortisol immunosensor based on MXene and multi-walled carbon nanotubes (MXene-MWCNTs) hybrid composite was proposed. The immunosensor was developed by screen printing technique on a flexible polyethyleneterephthalate (PET) substrate followed by modification of MXene-MWCNTs and anti-cortisol antibodies with EDC/NHS coupling agent. Owing to the large surface area and excellent conductivity of MXene-MWCNTs, the immunosensor exhibited a low detection limit and a wide linear range toward cortisol from 0.1 fg/mL to 1 µg/mL, which covered the normal range of free cortisol in sweat. Additionally, the immunosensor was applied to evaluate the cortisol level in human sweat samples, and the results were validated by a commercial chemiluminescence immunoassay (CLIA) assay. The present platform provides an effective method for non-invasive monitoring of human sweat cortisol levels, which may be well-suited for hormone screenings in healthy monitoring and medical diagnosis.
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Xiao-Hong Wen,Xue-Feng Zhao,Xiao-Huan Wang,Yang Wang,Jing-Chun Guo,Hou-Guang Zhou,Chuan-Tao Zuo,Hong-Liang Lu
Amyloid β protein oligomer (AβO) has been found to be a crucial biomarker of Alzheimer’s disease (AD). Exploring an accurate detection method of AβO is of great significance for early AD diagnosis and treatment. Herein, a fluorescent biosensor for AβO detection is designed. It integrates fluorescence resonance energy transfer (FRET)-based fluorescence detection with a poly(dimethylsiloxane) (PDMS)-based microfluidic chip. The carboxyl fluorescein-modified AβO aptamers are employed as the fluorophore, and three-dimensional Fe3O4/MXene nanospheres are used as the fluorescence quencher for the first time. Moreover, the PDMS-based multichamber microfluidic chip serves as a fluorescence detection platform. The Fe3O4/MXene-based nanosphere-based biosensor shows an excellent linear relationship between the fluorescence intensity and the logarithm of the AβO concentration in the range of 0.10–200 nM. The detection limit is ∼0.05 nM at the ultralow sample volumes of ∼4.50 μL. These results strongly show that the fabricated high-performance biosensor can be widely used in smart healthcare including but not limited to medical diagnosis, health monitoring, and biological studies.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Siqi Gong,Fan Zhao,Yaning Zhang,Huiting Xu,Meng Li,Junjie Qi,Honghai Wang,Zhiying Wang,Yuqi Hu,Xiaobin Fan,Wenchao Peng,Chunli Li,Jiapeng Liu
MXene has drawn considerable attention in energy storage due to particular physicochemical properties. At present, among most near-ambient temperature preparation methods, water is usually served as the main solvent. However, MXene is usually subjected to fast structural degradation on account of water molecules attacking in aqueous solution. Herein, we report a novel water-free etching strategy for synthesizing few-layered Ti 3 C 2 T x MXenes in deep eutectic solvents at near-ambient temperature. Benefitting from the absence of water and macromolecular structure of deep eutectic solvents, the as-synthesized few-layered Ti 3 C 2 T x (DES-Ti 3 C 2 T x ) MXene presents abundant −O terminations and low oxidation degree. As a consequence, the DES-Ti 3 C 2 T x MXene displays excellent specific capacitance of 320 F/g at 2 mV/s. Impressively, the DES-Ti 3 C 2 T x MXene exhibits splendid long-term stability that 97% specific capacitance retention can be acquired over 50 000 cycles at high current density of 50 A/g. Therefore, this study offers a new thought for preparing high performance MXene-based materials by water-free etching method.
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Weizhun Jin,Linhua Jiang,Lin Han,Haimeng Huang,Jianfeng Zhang,Mingzhi Guo,Yue Gu,Fangfang Zhi,Zhiyou Chen,Guohui Yang
New nanofluids based on graphene (GR) and GR/MXene were prepared to enhance the thermal conductivity. The thermal conductivity and viscosity of nanofluids at various temperatures in the 5–60 °C range were tested, and their stability was investigated by zeta potential and visual observation. The thermal performance of the nanofluids was evaluated through numerical simulation analysis. The results demonstrate that MXene can effectively improve the dispersion stability of GR nanofluids. The nanofluid with 2.0 wt% GR at 60 °C exhibited the maximum thermal conductivity enhancement (65.34%) but also the maximum viscosity increment (70.69%). With the addition of MXene, the high thermal conductivity of nanofluids was maintained while the viscosity significantly decreased. GR can greatly improve the heat transfer efficiency of nanofluids, and the temperature at the monitoring point resulted from 2.0 wt% GR decreased by 9.19 ℃ compared to water. The heat transfer efficiency of GR/MXene nanofluids was almost identical to that of GR nanofluids.
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危险品化学品经营许可证（带存储）