DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Huaijie Cao,Xiaoqing Ma,Tiange Wang,Wenhu Jia,Baolong Gong,Longling Guo,Pengzhan Xue,Chengrong Zhu,Xu Tian,YuLin Min,Qunjie Xu
Corrosion of metals leads to great economic losses and safety hazards. To address the corrosion problem of Al alloy in aggressive medium, two-dimensional (2D) graphene-like MXene composite coatings are proposed to enhance the corrosion resistance . Despite great progress, it still faces challenge to design high-performance MXene-based composite coating via a facile strategy because of the complex surface functionalization , orientation control, and the conductivity of MXene. Herein, a multilayer Ti 3 C 2 T x MXene/dodecyltrimethoxysilane (MXene/DTMS) coating is prepared by a layer-by-layer spraying method at ambient temperature to maximize the physical barrier of MXene nanosheets . As a result, the incorporation of MXene nanosheets can avoid the structural defects of silane coating after curing process, thereby improving the coating resistance and charge transfer resistance by ~11- and ~390-fold in comparison to Al counterpart, respectively. Beyond the traditionally complex surface functionalization and orientation control, the multilayer coating with complete coverage and strong physical barrier ability exhibits the high corrosion resistance with a impedance modulus of 3.74 × 10 7 Ω·cm 2 in 3.5 wt% NaCl solution. The designed coating shows promising applications in surface protection on Al alloy used in transmission cable, shafts, gears, and blades for offshore wind turbines .
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CHEMOSPHERE
·
2023
·
IF 8.8
Huiqi Zheng,Xiaorong Meng,Jiao Wu,Danghao Liu,Shanshan Huo
Heavy metal pollution can significantly harm water systems and human health. Combining photoelectrocatalytic (PEC) and nanofiltration (NF) membrane separation technologies can effectively remove heavy metal ions from wastewater. In this study, a water bath method was used to form SrF 2 /Ti 3 C 2 T x (ST) nanoparticles on the surface of polyvinylidene fluoride (PVDF) membranes and an additional polyamide (PA) functional layer was formed at the interface by crosslinking. ST@PA composite NF membranes (STPP) with good photocatalytic performance were obtained. The separation and catalytic properties of the STPP membranes were controlled by the ST content, which modifies the surface structure and properties of the membranes. The membrane with optimal ST crosslinking exhibited a water contact angle of 50.8°, pure water flux of 24.6 L·m −2 ·h −1 ·bar −1 , and rejection rates of Mn 2+ , Ni 2+ , Cu 2+ , and Zn 2+ of 98.8%, 95.3%, 95.7%, and 97.3%, respectively, under PEC-assisted separation with visible light illumination from a Xe lamp (300 W) and an applied voltage (2 V). The STPP membranes showed improved rejection rates of heavy metal ions under PEC-assisted operation. The mechanism for the improved membrane performance under PEC conditions was preliminarily clarified considering the relationship between the photocatalytic and filtration properties of STPP membranes along with the influence of light irradiation and an external voltage on the heavy metal ions. The generation of electrons, holes, superoxide radicals, and hydroxyl radicals during membrane operation enhances the rejection rates of heavy metal ions. Based on these results, STPP membranes are considered a promising technology for industrial applications in heavy metal removal.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xianhong Zheng,Qiaole Hu,Zongqian Wang,Wenqi Nie,Peng Wang,Changlong Li
Smart wearable electronics have drawn increasing attention for their potential applications in personal thermal management, human health monitoring, portable energy conversion/storage, electronic skin and so on. However, it is still a critical challenge to fabricate the multifunctional textiles with tunable morphology and performance while performing well in flexibility, air permeability , wearing comfortability. Herein, we develop a novel roll-to-roll layer-by-layer assembly strategy to construct bark-shaped carbon nanotube (CNT)/Ti 3 C 2 T x MXene composite film on the fiber surface. The fabricated bark-shaped CNT/MXene decorated fabrics (CMFs) exhibit good flexibility, air permeability and electrical conductivity (sheet resistance, 6.6 Ω/□). In addition, the CMFs demonstrate good electrothermal performance (70.9 °C, 5 V), electromagnetic interference (EMI) shielding performance (EMI shielding effectiveness, 30.0 dB under X-Brand), and high sensitivity as the flexible piezoresistive sensors for monitoring the human motions. Importantly, our CMFs show distinctive EMI shielding mechanism, where a great proportion of incident electromagnetic microwaves are reflected by the bark-shaped CNT/MXene films owing to the multi-interface scattering effects. This work may provide a new strategy for the fabrication of multifunctional textile-based electronics and pave the way for smart wearable electronics.
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FOOD CHEMISTRY
·
2021
·
IF 7.514
Zhihui Wu,Da-Wen Sun,Hongbin Pu,Qingyi Wei,Xuanran Lin
Mycotoxin B1 (AFB1) contamination in agricultural products pose a deadly danger to animal and human health and its rapid and reliable detection is thus very important. Herein, a ratiometric surface-enhanced Raman scattering (SERS) aptasensor for AFB1 detection was developed, in which 1,2-bis(4-pyridyl) ethylene (BPE) was used to trigger the assembly of Au nanoparticle dimers (AuNP dimers) and form intensive SERS “hot spots”, and MXenes nanosheets could load aptamer-modified AuNP dimers due to the hydrogen bonding and the chelation between the phosphate groups of aptamers and the Ti ion of MXenes. With the presence of AFB1 preferentially binding to AFB1 aptamer, AuNP dimers were separated from MXenes nanosheets, leading to a decrease in SERS intensity. Regression analysis in the range from 0.001 to 100 ng·mL −1 showed the limit of detection (LOD) being 0.6 pg·mL −1 in standard solution, indicating that the great prospects of the AuNP dimers/MXenes SERS substrate for detecting AFB1.
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Polymers
·
2021
·Vol. 13
·期 11
·1820
·
IF 4.329
Lu Liu,Guobing Ying,Yinlong Zhao,Yuexia Li,Yiran Wu,Dong Wen,Meng Wu,Minghui Wang,Qingzhong Zhou,Xiang Wang,Cheng Wang
As a member of two-dimensional (2D) materials, MXene is an ideal reinforcement phase for modified polymers due to its large number of polar functional groups on the surface. However, it is still relatively difficult to modify any functional groups on the surface of MXene at present, which limits its application in enhancing some polymers. Herein, one-dimensional (1D) attapulgite (ATP) nanomaterials were introduced onto the surface of MXene to form ATP–MXene hybrids, which successfully improved the mechanical properties of the epoxy composites. ATP with appropriate content can increase the surface roughness of the MXene lamellae to obtain better interface interaction. Therefore, remarkable enhancement on the mechanical property was achieved by adding M02A025 (0.2 wt % MXene and 0.25 wt % ATP), which is the optimum composition in the hybrids for composite mechanical properties. Compared to neat epoxy, the tensile strength, flexural strength and critical stress intensity factor (KIC) of M02A025/epoxy are increased by 88%, 57%, and 195%, respectively, showing a high application prospect.Keywords:MXene Ti3C2Tx;attapulgite;hybrids;epoxy-matrix composites;mechanical properties
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Nano Research
·
2021
·Vol. 14
·期 8
·2875-2883
·
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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JOURNAL OF ALLOYS AND COMPOUNDS
·
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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Nano Research
·
2020
·Vol. 14
·期 4
·1218-1227
·
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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SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Silong Wang,Yan Wang,Jinquan Wan,Yongwen Ma,Zhicheng Yan,Guihua Zhang
With high redox ability of electrons and holes, Z-scheme heterojunction is a promising composite structure in the photocatalysis. However, it is challenging to inhibit the recombination of carriers by Z-scheme transfer. Herein, a novel Ag 3 PO 4 /AgBr/Ti 3 C 2 Tx hybrid with dual channel carrier transfer structure was fabricated. Ti 3 C 2 Tx not only serves as a template for growth of Z-scheme Ag 3 PO 4 /AgBr, but also can be used to accommodate holes transferred from Ag 3 PO 4 and AgBr. The first channel is consisted of Z-scheme transfer of carriers in Ag 3 PO 4 /AgBr. And the hole transfer from the AgBr valence band to Ti 3 C 2 Tx constitutes the second channel, which avoids directly carrier recombination in AgBr valence band. Dual channel carrier transfer pathway was proved by in situ irradiated X-ray photoelectron spectroscopy (ISI-XPS). After Ti 3 C 2 Tx was introduced, the quantum efficiency of Ag 3 PO 4 /AgBr increased from 10.59% to 12.50% with reducing Cr(VI), indicating an increase in carrier utilization. The improvement of the degradation efficiency of rhodamine B from 80.77% to 94.72% is benefited from the enhanced quantum efficiency. The dual channel carrier transfer heterojunctions design provides a new idea for constructing an efficient composite photocatalytic structure.
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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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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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ACS Nano
·
2020
·
IF 14.588
Xing Zhao,Li-Ya Wang,Chun-Yan Tang,Xiang-Jun Zha,Yong Liu,Bai-Hai Su,Kai Ke,Rui-Ying Bao,Ming-Bo Yang,Wei Yang
An increasing utilization of flexible healthcare electronics and biomedicine-related therapeutic materials urges the development of multifunctional wearable/flexible smart fabrics for personal therapy and health management. However, it is currently a challenge to fabricate multifunctional and on-body healthcare electronic devices with reliable mechanical flexibility, excellent breathability, and self-controllable joule heating effects. Here, we fabricate a multifunctional MXene-based smart fabric by depositing 2D Ti3C2Tx nanosheets onto cellulose fiber nonwoven fabric via special MXene–cellulose fiber interactions. Such multifunctional fabrics exhibit sensitive and reversible humidity response upon H2O-induced swelling/contraction of channels between the MXene interlayers, enabling wearable respiration monitoring application. Besides, it can also serve as a low-voltage thermotherapy platform due to its fast and stable electro-thermal response. Interestingly, water molecular extraction induces electrical response upon heating, i.e., functioning as a temperature alarm, which allows for real-time temperature monitoring for thermotherapy platform without low-temperature burn risk. Furthermore, metal-like conductivity of MXene renders the fabric an excellent Joule heating effect, which can moderately kill bacteria surrounding the wound in bacteria-infected wound healing therapy. This work introduces a multifunctional smart flexible fabric suitable for next-generation wearable electronic devices for mobile healthcare and personal medical therapy.
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