Environmental Science-Nano
·
2022
·Vol. 9
·期 12
·4468-4483
·
IF 9.473
Peng Zhang,Yiran Wang,Xiaomin Luo,Jian Wang,Wenqi Wang,Xubin Duan,Kai Qi,Meng Li
The heterogeneous electro-Fenton (HEF) membrane has shown great potential for the treatment of refractory organic pollutants, but there are growing demands to improve its degradation efficiency and suitability for addressing practical organic pollutant issues. Here, a novel Co-CNT/Ti3C2TX nanocomposite membrane was successfully prepared by vacuum filtration, followed by heat treatment. Different from the traditional batch reactor, a flow-through reactor with Co-CNT/Ti3C2TX membrane was designed as an electrode to make the full use of the combined synergistic effect of adsorption and electro-Fenton (EF) process for the degradation of organic pollutants. The results found that the Co-CNT/Ti3C2TX flow-through HEF system exhibited satisfactory degradation (99.0–83.2%) on tetracycline (TC) in a wide range of pH 2.0–7.0. In addition, the obtained Co-CNT/Ti3C2TX membrane possesses self-cleaning performance in long-term continuous conditions. Co-CNT/Ti3C2TX membrane can also be used to treat practical TC wastewater with complex components, tannery printing and dyeing wastewater, and wastewater with different water matrices, and their removal efficiency can reach more than 87.0%. Specially, the coupling effect could be beneficial to accelerate the degradation of pollutants in the EF process. The method provided in this work could be further expanded, making industrial usage of the HEF membrane a reality.
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Advanced Materials Technologies
·
2022
·Vol. 7
·期 7
·2101639
·
IF 8.856
Chuqiao Hu,Hao Chen,La Li,Hui Huang,Guozhen Shen
The enriched surface functional group such as OH termination and unique 2D structure of Ti 3 C 2 T x MXene provide the feasibility to form hydrogen bonds with organic photosensitive materials as van der Waals heterostructures, thus can realize the improved photoresponsivity of near infrared (NIR) photodetectors (PDs). In this work, an organic–inorganic van der Waals heterostructure-based NIR PD array is designed using Ti 3 C 2 T x MXene as conductive electrodes and RAN film as active materials (Ti 3 C 2 T x -RAN PDs). The on-off ratio of the fabricated devices shows 6.25 times higher than that of PDs using thermal evaporated Au electrode (Au-RAN PDs) under 1064 nm laser excitations. The fabricated Ti 3 C 2 T x -RAN NIR PDs also possess outstanding mechanical stability with no obvious photoresponse degradation under different bending states and high transparency with a transmittance above 70% in the visible region. Owing to the high performance of the Ti 3 C 2 T x -RAN PDs, a 1024-pixel (32 × 32) image sensor array is fabricated to achieve delicate, vivid, and higher resolution imaging of a “deer,” opening up a new avenue for the biomimetic vision and flexible wearable accurate image sensing.
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JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Haoqiang Wang,Pengju Wang,Wei Gan,Lijie Ci,Deping Li,Qunhui Yuan
Aiming to improve the sluggish ion insertion/extraction at the battery-type anode in lithium-ion/sodium-ion hybrid capacitor (LIC/SIC), herein, a VS 4 @L-Ti 3 C 2 T x composing of VS 4 nanoarrays and MXene with enlarged interlayer spacing is developed through a facile hydrothermal approach. Benefiting from the merits of building blocks, the VS 4 @L-Ti 3 C 2 T x based lithium-ion half-cell exhibits superior specific capacity (1328 mAh g −1 after 170 cycles at 0.1 A g −1 ), rate performance (808 mAh g −1 after 10 cycles at 20 A g −1 ) and cycling stability (721 mAh g −1 after 500 cycles at 1.0 A g −1 ), surpassing most of the reported VS 4 based counterparts. The sodium-ion half-cell with VS 4 @L-Ti 3 C 2 T x anode also shows good performances. Moreover, LIC and SIC based on VS 4 @L-Ti 3 C 2 T x anodes deliver high energy densities of 122.5 Wh kg −1 and 117.0 Wh kg −1 at a low power density 100.3 W kg −1 , respectively. Additionally, they exhibit excellent cycling lifespans with capacity retention of 60% after 20000 cycles for LIC at a high current rate 1.0 A g −1 , outperforming most of the reported analogues. This study may shed light on the development of other layered anode materials for energy storage devices.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yixuan Xia,Jiating Li,Gangbing Zhu,Yinhui Yi
Anodic stripping voltammetry (ASV) is presently the most widely used method for mercury ion (Hg 2+ ) detection, but it generally needs an electrodeposition step. As a new star nanomaterial , MXenes shows greatly important applications in electrochemical sensing. In this work, by preparing Ti 3 C 2 T x MXenes nanoribbons/carbon nanotube (Ti 3 C 2 T x R/CNT) nanohybrids to modify glassy carbon electrode (GCE) as sensing platform, an innovative strategy without electrodeposition was proposed for the sensitive detection of Hg 2+ . The results show that Ti 3 C 2 T x R exhibits spontaneous adsorption and reduction capability towards Hg 2+ , which can make Hg 2+ self-reduced and preconcentrated on the electrode surface . Coupled with the excellent electronic properties of CNT, an electrodeposition-free and sensitive ASV sensor was constructed, and Ti 3 C 2 T x R/CNT/GCE can exhibit superior sensing performances for Hg 2+ analysis with a low detection of limit (5.2 nM) and wide linearity range (0.01–7.0 μM). This work offered a new direction for MXenes nanomaterials and Hg 2+ detection.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liu-Xin Liu,Wei Chen,Hao-Bin Zhang,Yu Zhang,Pingping Tang,Danyang Li,Zhiming Deng,Lvxuan Ye,Zhong-Zhen Yu
Although transition metal carbide (MXene) fibers are highly electrically conductive, the poor spinnability of neat MXene dispersion and the brittleness of the conductive fibers limit their applications. Herein, a coaxial wet spinning assembly strategy is adopted to fabricate mechanically strong and electrically conductive Ti 3 C 2 T x MXene-based core–shell fibers with regenerated cellulose (RC) as the tough component and graphene oxide/MXene (GM) as the conductive components. By an optimal structure design, the hollow RC@GM 90 fiber with the RC shell exhibits an increased strength of 134.7 MPa, a high toughness of 14.1 MJ m −3 , a large elongation at break of 13%, and a high conductivity of 2.37×10 3 S m −1 . By sewing on a textile substrate, the hollow RC@MXene fibers with a high conductivity of 3.68×10 4 S m −1 provide an extraordinary electromagnetic interference shielding efficiency of over 90 dB and outstanding solar-thermal energy conversion performances. Similarly, by improving spinnability of the MXene spinning dope with an aqueous dispersion of GO, solid core–shell GM@RC fibers with conductive GM shells are fabricated by the coaxial spinning, and the chemically reduced GM@RC fibers exhibit a high conductivity of 9.90×10 4 S m −1 and excellent electro-thermal energy conversion performances.
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CHEMOSPHERE
·
2021
·
IF 7.086
Zhifeng Li,Jie Li,Jie Tan,Mengyun Jiang,Shuhan Fu,Tingting Zhang,Xiaohui Wang
A novel peroxo-functionalized Ti 3 C 2 T x adsorbent with abundant surface termination groups was facilely prepared in situ to remove aqueous anionic and cationic dyes. The adsorption behavior of methylene blue on peroxo-functionalized Ti 3 C 2 T x was systematically investigated by adsorption kinetics, isotherms, and thermodynamics. Compared with Ti 3 C 2 T x , the adsorption capacities of peroxo-functionalized Ti 3 C 2 T x for cationic dyes methylene blue (558.0 mg g −1 ), rhodamine B (524.6 mg g −1 ) and anionic dyes methyl orange (292.6 mg g −1 ), congo red (258.2 mg g −1 ) were increased at room temperature without adjustment of pH, background ions and humic acid , etc of the contaminant solution by 7.9, 5.3, 5.9 and 4.6 times, respectively. In addition, peroxo-functionalized Ti 3 C 2 T x could well tolerate the effects of pH, ionic strength, and humic acid. As revealed by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, the adsorption mechanism of peroxo-functionalized Ti 3 C 2 T x for anionic and cationic dyes was mainly attributed to the electrostatic interaction, hydrogen bonding interaction, and noncovalent surface-π attraction interaction. This study demonstrates a facile modification strategy for Ti 3 C 2 T x adsorbent materials and aims to provide insights for the development of excellent Ti 3 C 2 T x -based adsorbent materials.
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PubMed
高影响因子
Nano-Micro Letters
·
2021
·Vol. 13
·期 1
·1-11
·
IF 16.419
Li La,Liu Weijia,Jiang Kai,Chen Di,Qu Fengyu,Shen Guozhen
Flexible Zn-ion hybrid micro-supercapacitors (MSCs) array was fabricated with Ti 3 C 2 T x as the cathode via laser direct writing method, which present ultrastability up to 50,000 cycles after in-situ annealed treatment.
A digital timer driven by the obtained single MSC under bending state, together with a flexible LED displayer of the “TiC” logo lighted by the MSC arrays under twisting, crimping and winding conditions demonstrate the great potential application of the MSCs in integrated wearable electronics.
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高影响因子
ACS Nano
·
2021
·
IF 15.881
Kuo Yang,Kai Zhu,Yuanzhe Wang,Ziting Qian,Yizhi Zhang,Zhaoyan Yang,Zhuyuan Wang,Lei Wu,Shenfei Zong,Yiping Cui
Gas sensors lie at the heart of various fields ranging from medical to environmental sciences, and the demand of gas sensors is instantly expanding. However, in the face of complex gas samples, how to maintain high sensitivity while performing multiplex detection still puzzles the researchers. Here, by introducing Ti3C2Tx MXene into a microfluidic gas sensor with a three-dimensional (3D) transferable SERS substrate, a powerful gas sensor having both multiplex detecting ability and high sensitivity is demonstrated. The employ of MXene endows the sensor with a universal high adsorption efficiency for various gases while the generation of in situ gas vortices in the sophisticated nanomicro structure extends the molecule residence time in SERS-active area, both leading to the increased sensitivity. In the proof-of-concept experiment, a limit of detection (LOD) of 10–50 ppb was achieved for three typical volatile organic compounds (VOCs) according to the intrinsic SERS signals of gas molecules. Besides, the well-designed periodic 3D structure solves the general repeatability problem of SERS substrates. In addition, the detailed composition of gas mixture was revealed using classic least-square analysis (CLS) with an average accuracy of 90.6%. Further, a chromatic barcode was developed based on the results of CLS to read out the complex composition of samples visually.
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高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2021
·Vol. 44
·期 18
·3398-3406
·
IF 3.645
Tiantian Pang,Xiaohui Chen,Kai Hu,Yongxia Cui,Wenjie Zhao,Huahui Zeng,Zhenqiang Zhang,Shusheng Zhang
In this study, a new Ti 3 C 2 T x -coated fiber was synthesized and utilized as coatings for solid-phase microextraction of seven polychlorinated biphenyls. The as-produced multilayered Ti 3 C 2 T x MXene was characterized by X-ray diffractometer, thermos-gravimetric analysis, scanning electron microscopy, and energy dispersive spectroscopy. It is noteworthy that the Ti 3 C 2 T x showed some attractive features including unique 2D layered structures, large surface area, good hydrophilicity, and rich active recognition sites, endowing it has a high affinity towards the target polychlorinated biphenyls. Subsequently, the affecting parameters on the extraction efficiency of polychlorinated biphenyls were optimized. Under the optimal conditions, a novel method for the analysis of polychlorinated biphenyls in water samples was proposed. The Ti 3 C 2 T x -coated fiber-based solid-phase microextraction method showed good linearity ( r 2 > 0.9928), high enrichment factors (268–442), low limits of detection (0.06–0.15 ng/L), and satisfactory repeatability (RSDs < 7.5%) for the polychlorinated biphenyls. The excellent method recoveries were in the range of 90.0–98.4, 92.0–98.2, and 92.0–98.0% for river water, lake water, and tap water samples, respectively. These results suggested that the proposed Ti 3 C 2 T x -coated fiber-based method represents a promising alternative for the analysis of polychlorinated biphenyls.
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高影响因子
ACS Nano
·
2021
·
IF 15.881
Hongchen Wang,Ruicong Zhou,Donghai Li,Linrong Zhang,Guozhang Ren,Li Wang,Jinhua Liu,Deyang Wang,Zhenhua Tang,Gang Lu,Gengzhi Sun,Hai-Dong Yu,Wei Huang
The flexible strain sensor is of significant importance in wearable electronics, since it can help monitor the physical signals from the human body. Among various strain sensors, the foam-shaped ones have received widespread attention owing to their light weight and gas permeability. However, the working range of these sensors is still not large enough, and the sensitivity needs to be further improved. In this work, we develop a high-performance foam-shaped strain sensor composed of Ti3C2Tx MXene, multiwalled carbon nanotubes (MWCNTs), and thermoplastic polyurethane (TPU). MXene sheets are adsorbed on the surface of a composite foam of MWCNTs and TPU (referred to as TPU/MWCNTs foam), which is prefabricated by using a salt-templating method. The obtained TPU/MWCNTs@MXene foam works effectively as a lightweight, easily processable, and sensitive strain sensor. The TPU/MWCNTs@MXene device can deliver a wide working strain range of ∼100% and an outstanding sensitivity as high as 363 simultaneously, superior to the state-of-the-art foam-shaped strain sensors. Moreover, the composite foam shows an excellent gas permeability and suitable elastic modulus close to those of skin, indicating its being highly comfortable as a wearable sensor. Owing to these advantages, the sensor works effectively in detecting both subtle and large human movements, such as joint motion, finger motion, and vocal cord vibration. In addition, the sensor can be used for gesture recognition, demonstrating its perspective in human—machine interaction. Because of the high sensitivity, wide working range, gas permeability, and suitable modulus, our foam-shaped composite strain sensor may have great potential in the field of flexible and wearable electronics in the near future.
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JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Ziyuan Zhou,Lei Li,Xiaoya Liu,Haoyong Lei,Wanjie Wang,Yanyu Yang,Jianfeng Wang,Yanxia Cao
Two-dimensional (2D) transition metal carbides and nitrides (MXenes) have spurred great attention in many applications due to their outstanding electronic or mechanical properties. The exfoliation into single and fewer layer nanosheets of MXene is a requisite step for performance study in many cases. Herein this study aims to propose a facile and convenient liquid phase exfoliation (LPE) method to fabricate fewer-layer MXene nanosheets in large scale. The Hansen solubility parameters (HSPs) and surface tension component ratio are estimated and further applied to detect a green low-boiling-point water/acetone cosolvent for the better exfoliation of MXene. It has been found that the exfoliation efficiency is improved efficiently by matching HSPs and surface tension component ratio of MXene to that of solvents. A high concentrated MXene dispersion up to 1.727 mg/ml in the optimum composition of the water/acetone mixture which is approximately 78 and 5 times higher than that in pure acetone and water, respectively. Detailed characterization of morphology and suspension stability of exfoliated MXene are implemented which exhibit that the high quality and more stable MXene nanosheets are obtained in the suitable cosolvent. In addition, the determined HSPs and surface tension component ratio of MXene here will make a contribution to finding other new efficient solvents for MXene conveniently in specific fields.
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COMPOSITES SCIENCE AND TECHNOLOGY
·
2020
·
IF 7.094
Bing Zhou,Zhaoyang Li,Yanli Li,Xianhu Liu,Jianmin Ma,Yuezhan Feng,Dianbo Zhang,Chengen He,Chuntai Liu,Changyu Shen
Developing multifunctional transparent shielding films (TSFs) are highly desirable for the advanced visualization electronic devices. Herein, based on the excellent electrical conductivity of two-dimensional Ti 3 C 2 T x (MXene), flexible hydrophobic MXene-based transparent conducting films are applied in the field of shielding electromagnetic wave and electrical heating. Typically, a spraying coupled with spinning technique is demonstrated to orderly deposit MXene and hydrophobic fumed silica (Hf-SiO 2 ) on transparent polycarbonate (PC) for developing the multifunctional TSFs. The obtained sandwich structural PC/MXene/Hf-SiO 2 film exhibits the balanced optical and electrical properties with a low electrical resistance of 35.1 Ω/sq and corresponding transmittance of 33.4%, showing an effective electromagnetic interference shielding effectiveness (EMI SE > 20 dB) combined with a rapid steady joule heating performance at safe voltages (~100 °C at 13 V), simultaneously. Meanwhile, the superhydrophobic Hf-SiO 2 coating layer not only endows the film with excellent self-cleaning ability, but also prevents MXene from oxidation . As a result, the hydrophobicity , conductivity and shielding performance of this film can steadily maintain in outdoor conditions for 100 days. Besides, outstanding flexibility gives the film with superior mechanical fatigue resistance (<10% resistance change after mechanical bending 1000 cycles). This work opens a new avenue for preparing next-generation multifunctional TSFs to meet the various application environments.
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