Nano Research
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2021
·Vol. 14
·期 8
·2875-2883
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IF 8.897
Xu Xiaowen,Chen Yucheng,He Pei,Wang Song,Ling Kai,Liu Longhui,Lei Pengfei,Huang Xianjun,Zhao Hu,Cao Jianyun,Yang Junliang
Strain sensors with good stability are vital to the development of wearable healthcare monitoring systems. However, the design of strain sensor with both duration stability and environmental stability is still a challenge. In this work, we propose an ultra-stable and washable strain sensor by embedding a coupled composite film of carbon nanotube (CNT) and Ti 3 C 2 T x MXene into polydimethylsiloxane (PDMS) matrix. The composite strain sensor with embedded microstructure and uneven surface makes it conformal to skin, while the CNT/MXene sensing layer exhibits a resistance sensitive to strain. This sensor shows reliable responses at different frequencies and with long-term cycling durability (over 1,000 cycles). Meanwhile, the CNT/MXene/PDMS composite strain sensor provides the advantages of superior anti-interference to temperature change and water washing. The results demonstrate less than 10% resistance changes as the temperature rises from −20 to 80 °C or after sonication in water for 120 min, respectively. The composite sensor is applied to monitor human joint motions, such as bending of finger, wrist and elbow. Moreover, the simultaneous monitoring of the electrocardiogram (ECG) signal and joint movement while riding a sports bicycle is demonstrated, enabling the great potential of the as-fabricated sensor in real-time human healthcare monitoring.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Yan Zhang,Jin Yu,Jiayu Lu,Chenjie Zhu,Dongming Qi
Rapid growing of electronics has not only caused severe electromagnetic wave pollution, but also created a risk of fire and explosion. Therefore, developing ultralight, fire-resistant, high-performance electromagnetic interference (EMI) shielding materials are imperative but also challenging. Considering the outstanding metallic conductivity and high aspect ratio, 2D Ti 3 C 2 T x has been reported to be one of the most promising candidates for exhibiting excellent EMI shielding performance. Herein, we demonstrate a facile method to fabricate cellulose nanofiber (CNF)/ammonium polyphosphate (APP)/Ti 3 C 2 T x composite aerogels via a simple freeze-drying method. The resultant CNF/APP/Ti 3 C 2 T x composite aerogels exhibited excellent fire-resistance without obvious shrinkage when placed over the flame of an alcohol burner. Besides, the 8-mm-thick composite aerogel with 60% of Ti 3 C 2 T x showed an average EMI shielding effectiveness of 55 dB (specific EMI shielding effectiveness/thickness could be ~5729 dB cm 2 g −1 ) with an absorption-dominant mechanism. This performance is owing to the relative high electrical conductivity (12 S/m) and multiple reflections from the porous structure. These characteristics make the composite aerogel a much more competitive product for a high-performance EMI shielding material.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 9
·4292-4302
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IF 3.591
Haozhe Ning,Zhongying Ma,Zhihao Zhang,Dan Zhang,Yuhua Wang
Polyvinyl alcohol (PVA) is a biodegradable polymer with many ideal properties (such as excellent gas barrier properties, transparency and easy hydrolysis) and has a wide range of applications. However, its flammability is the main problem hindering its application in industry and life. Therefore, an effective flame retardant is needed to suppress its flammability while maintaining its own excellent performance. MXene, as a new graphene-like material has the prospect of being used in flame retardant polymers. However, the preparation of flame retardant MXene polymer nanocomposites has been hindered due to the MXene's poor interfacial compatibility with the polymer matrix. To solve this problem, nano-silica was deposited on the surface of MXene by hydrolyzing ethyl orthosilicate in situ and treating with a silane coupling agent. The effects of modified-MXene (m-MXene) on the PVA performance were studied by comparing the performances of PVA and m-MXene/PVA. The related results showed that m-MXene could significantly enhance the flame retardant performance, char formation capacity and the tensile properties of PVA. Specifically, the peak heat release rate (pHRR) of the m-MXene2/PVA nanocomposite with 2% m-MXene was 34.9% lower than that of pure PVA. The tensile strength and elongation at break of m-MXene2/PVA increased by 32.9% and 97% compared to those of pure PVA, respectively. The unique structure of m-MXene and its excellent dispersion, catalytic effect and barrier effect on PVA are the main reasons for improving these properties. This study provides a new strategy for the application of MXene in polymer nanocomposites, and enriches the application of MXene in the field of flame retardation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Chenxue Yao,Wenqian Zhang,Lijian Xu,Mengmeng Cheng,Yan Su,Jie Xue,Jinglei Liu,Shifeng Hou
In this work, we report a facile and scalable approach to synthesis a porous MXene/single-walled carbon nanotubes (p-MXene/SWCNTs) film as a freestanding electrode for the electrosorption of the organic dyes in wastewater. Dye adsorption of wastewaters is a crucial issue in the water treatment. Nevertheless, there are still several obstacles in the adsorption process hindering its practical application, such as the low efficiency and hard recycle. Electrosorption is an electrochemically accelerate adsorption technique with high removal efficiency, low cost and easy control. As a result, the as-prepared p-MXene/SWCNTs film shows spectacular adsorption capacity for methylene blue (MB) with 1068.8 mg g −1 when the applied voltage is −1.2 V, which is much higher than that of open circuit with 55.8 mg g −1 . Notably, the as-prepared electrode exhibits excellent reusability without secondary pollution and the maximum adsorption capacity is up to 28403.7 mg g −1 . In addition, it also possesses outstanding selective adsorption for MB and methyl orange (MO) by adjusting the pH values. We anticipate that this strategy of designing p-MXene/SWCNTs film as a freestanding electrode material will be a promising way to remove organic dyes in the wastewaters. Furthermore, we forecast that the as-synthesized p-MXene/SWCNTs film is promising to be acted as flexible electrode applicating in capacitive deionization, supercapacitors, solar cell, catalysts, and biosensors.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Yuqing Sun,Dean Xu,Shilong Li,Lele Cui,Yongxiang Zhuang,Weihong Xing,Wenheng Jing
Severe stacking and swelling properties are critical issues in two-dimensional (2D) lamellar membrane fabrication and separation processes that can result in low flux and poor rejection. Herein, we propose the assembly of multidimensional MXene-carbon nanotube (CNT) ultrathin membranes by loading a MXene intercalated with CNTs onto a tubular ceramic membrane . Benefiting from the modes of van der Waals interactions (hydrogen bond) and repulsion forces between the MXene and functionalized CNTs, the one-dimensional (1D) CNTs are well dispersed and intercalated into the 2D MXene nanosheets , forming a uniform network and continuous three-dimensional (3D) labyrinthine short mass transfer channels, which can considerably improve the permeability and rejection performance of the membranes. Furthermore, the membranes exhibit a distinct suppressed swelling property via a facile thermal crosslinking process (-OH + -OH = -O- + H 2 O and -COOH + -OH = -COO + H 2 O), accompanied by the formation of new chemical bonds (Ti-O-C and Ti-COO-C) due to dehydroxylation between the neighboring MXene nanosheets and CNTs. Additionally, 50 h long-term operation studies also indicate the promising anti-swelling property and stability of the MXene-CNT membranes. This multidimensional (1D and 2D) assembly and thermal crosslinking strategy represents a new avenue for the facile and scalable development of MXene-based and other 2D material-derived high-performance membranes for water purification .
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高影响因子
Nano Research
·
2020
·Vol. 14
·期 4
·1218-1227
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IF 8.183
Huang Pengfei,Zhang Shunlong,Ying Hangjun,Yang Wentao,Wang Jianli,Guo Rongnan,Han Weiqiang
Pillaring technologies have been considered as an effective way to improve lithium storage performance of Ti 3 C 2 T x MXene. Nevertheless, the pillared hybrids suffer from sluggish Li + diffusion kinetics and electronic transportation due to the compact multi-layered MXene structure, thus exhibiting inferior rate performance. Herein, the few-layered Ti 3 C 2 MXene (f-Ti 3 C 2 MXene) which is free from restacking can be prepared quickly based on the NH 4 + ions method. Besides, Fe nanocomplex pillared few-layered Ti 3 C 2 T x (FPTC) heterostructures are fabricated via the intercalation of Fe ions into the interlayer of f-Ti 3 C 2 MXene. The f-Ti 3 C 2 MXene which is immune to restacking can provide a highly conductive substrate for the rapid transport of Li + ions and electrons and possess adequate electrolyte accessible area. Moreover, f-Ti 3 C 2 MXene can efficiently relieve the aggregation, prevent the pulverization and buffer the large volume change of Fe nanocomplex during lithiation/delithiation process, leading to enhanced charge transfer kinetics and excellent structural stability of FPTC composites. Consequently, the FPTC hybrids exhibit a high capacity of 535 mAh·g −1 after 150 cycles at 0.5 A·g −1 and an enhanced rate performance with 310 mAh·g −1 after 850 cycles at 5 A·g −1 . This strategy is facile, universal and can be extended to fabricate various few-layered MXene-derived hybrids with superior rate capability.
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高影响因子
MATERIALS & DESIGN
·
2020
·
IF 6.289
Xianhong Zheng,Wenqi Nie,Qiaole Hu,Xuewei Wang,Zongqian Wang,Lihua Zou,Xinghua Hong,Haiwei Yang,Jiakun Shen,Changlong Li
With the rapid development of information technology and electronics, the traditional textiles hardly fulfill the requirements of wearable electronics. Multifunctional textile-based electronics integrated with energy storage, joule heating, electromagnetic interference (EMI) shielding and sensing has become a favorable solution. Herein, a scalable spray-coating and dip-coating strategy is developed to fabricate the multifunctional reduced graphene oxide/Ti 3 C 2 T x MXenes decorated cotton fabrics. The RGO/MXene modified fabrics show hydrophilic surface, high electrical conductivity, good flexibility and breathability. In addition, the RGO/MXene modified fabrics demonstrate excellent electrochemical performance, and the assembled all-solid-state supercapacitors show one of the highest specific capacitances of 383.3 F g −1 (258 mF cm −2 ). More importantly, the RGO/MXene fabrics show distinctive negative resistance variation and high sensitivity when they are applied as the strain sensors to detect the human motions including the bending of finger, elbow, knee and swallowing process. Moreover, the RGO/MXene fabrics show good joule heating and EMI shielding performance. This work may shed light on cost-effective but high-performance textile-based strain sensors, EMI shielding and electrochemical energy storage devices, and paves the way for the development of multifunctional wearable electronics.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Wanyi Xie,Yanzi Wang,Jie Zhou,Meng Zhang,Jiali Yu,Caizhen Zhu,Jian Xu
In this work, a MOF-derived Co-Fe oxide porous nanorod is introduced into the freestanding MXene film to produce a high-performance flexible electrode with excellent deformability and editability. The as-prepared composite film electrode demonstrates several advantages: MXene layer functions as a binder and conductive additive to coat Co-Fe oxide, which can effectively facilitate charge transfer and maintain the excellent flexibility of the film electrode. In the meantime, Co-Fe oxide can work as a spacer, thereby expanding the interlayer distance, improving the ion transmission path in the electrode. As a result, the optimal Co-Fe oxide/Ti 3 C 2 T X composite paper manifests a remarkable volumetric capacitance of 2467.6 F cm −3 in 1 M LiCl electrolyte. When assembled into a flexible symmetrical supercapacitor, an outstanding specific areal capacitance of 356.4 mF cm −2 can be obtained. Meanwhile, the flexible supercapacitor demonstrates excellent cycling performance with a high capacitance retention of 88.2% after 10 000 charge/discharge cycles, as well as stable electrochemical energy storage stability after 100 cycles of mechanical bending, indicating its great application potential in future flexible and portable energy storage equipment.
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高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bing Zhou,Mengjie Su,Daozheng Yang,Gaojie Han,Yuezhan Feng,Bo Wang,Jialu Ma,Jianmin Ma,Chuntai Liu,Changyu Shen
Transparent conductive film (TCF) is promising for optoelectronic instrument applications. However, designing a robust, stable, and flexible TCF that can shield electromagnetic waves and work in harsh conditions remains a challenge. Herein, a multifunctional and flexible TCF with effective electromagnetic interference shielding (EMI) performance and outstanding electro-photo-thermal effect is proposed by orderly coating Ti3C2Tx MXene and a silver nanowire (AgNW) hybrid conductive network using a simple and scalable solution-processed method. Typically, the air-plasma-treated polycarbonate (PC) film was sequentially spray-coated with MXene and AgNW to construct a highly conductive network, which was transferred and partly embedded into an ultrathin poly(vinyl alcohol) (PVA) film using spin coating coupled with hot pressing to enhance the interfacial adhesion. The peeled MXene/AgNW-PVA TCF exhibits an optimal optical and electrical performance of sheet resistance 18.3 Ω/sq and transmittance 52.3%. As a consequence, the TCF reveals an effective EMI shielding efficiency of 32 dB in X-band with strong interfacial adhesion and satisfactory flexibility. Moreover, the high electrical conductivity and localized surface plasmon resonance (LSPR) effect of hybrid conductive network endow the TCF with low-voltage-driven Joule heating performance and excellent photothermal effect, respectively, which can ensure the normal functioning under extreme cold condition. In view of the comprehensive performance, this work offers new solutions for next-generation transparent EMI shielding challenges.
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Yi Cui,Dongao Zhang,Kelin Shen,Siqing Nie,Meiying Liu,Hongye Huang,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
MXene has emerged as one of the most interest two-dimensional layered materials that has been extensively explored for various applications. In this work, a novel biomimetic method has been developed for the first time to fabricate Ti 3 C 2 MXene based magnetic Fe 3 O 4 composites that relied on the self-polymerization of dopamine and subsequent mild temperature pyrolysis. We demonstrated that many organic dyes could be rapidly degraded by the MXene-MNPs composites through Fenton reaction with extremely high efficiency. The degradation efficiency could be greater than 97 % under the optimized experimental conditions. Moreover, the catalysts displayed a good recyclable property after five continuous cycles. Electron paramagnetic resonance analysis and quenching results indicated that both OH and O 2 − were the reactive species and involved in the degradation process. Owing to the universality and mild reaction conditions of mussel-inspired biomimetic method, many other multifunctional composites with great research interest could also be fabricated. We also believe that this work will provide some new insights for fabrication of highly efficient catalysts for advanced oxidation processes and exploring the critical roles of polydopamine in advanced oxidation procedures.
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Environmental Technology & Innovation
·
2020
·
IF 3.356
Vu Thi Quyen,Le Thi Thu Ha,Dang My Thanh,Quyet Van Le,Nguyen Minh Viet,Nguyen Thi Nham,Phan Quang Thang
Advanced synthesis of nanoflower structures consisting of TiO 2 @Ti 3 C 2 nanoflowers with three-dimensional (3D) porous frameworks from two-dimensional (2D) Ti 3 C 2 MXene was done and applied for degradation of organic pollutant. The special structure of material was created by the in situ transformation, starting from Ti 3 C 2 T x MXene as provision of Ti source. The basis properties of material were characterized by SEM, TEM , XRD and XPS. The Ti 3 C 2 T x MXene showed layered structure and then this morphology was replaced by nanoflower spheres with rapid growth of TiO 2 @Ti 3 C 2 nanowhiskers. In terms of application, the TiO 2 @Ti 3 C 2 heterojunction showed an extraordinary photocatalytic efficiency toward Rhodamine B (RhB) compared to performances of pristine Ti 3 C 2 , and commercial TiO 2 . In addition, the TiO 2 @Ti 3 C 2 composite also displays the good recyclability even after 5th degradation cycles. Based on the finding, it gains a deeper insight into practical applications of 2D transition metal carbide for treatment of organic pollutants in wastewater.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Xiaobao Zhang,Baiyi Shao,Aoping Guo,Zhe Gao,Yong Qin,Ce Zhang,Fangming Cui,Xiaojing Yang
Co-Ni bimetallic oxides were successfully deposited on Ti 3 C 2 T x MXene nanosheets by atomic layer deposition technology and used as pseudocapacitive materials for supercapacitors. The uniform distribution of metal oxide nanoparticles on MXene nanosheets endows the pseudocapacitive materials more active sites and the synergistic effect between CoO x and NiO greatly improves the electrochemical performance. Specifically, as the deposited cycle increased to 90, the sample showed the optimal electrochemical performance with specific capacitance up to 1960 F g −1 (1 A g −1 ), 20.3 times higher by than that of Ti 3 C 2 T x MXene, excellent rate capability (87.3% capacitance retention, 1–18 A g −1 ) and 90.2% capacitance retention after 8000 cycles.
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高影响因子
危险品化学品经营许可证（带存储）