ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
He Chen,Xu Xiao,Qizhen Zhu,Peng Zhang,Xiaoxue Wang,Bin Xu
Mn3O4 is regarded as a promising anode material for lithium-ion batteries (LIBs) based on its ultrahigh theoretical capacity (937 mAh g–1) and low cost but suffers from poor electronic conductivity and large volume variation during the lithiation/delithiation process, which result in dramatic capacity fading and inferior rate capability. Ti3C2Tx MXene, a novel two-dimensional transition metal carbide with metallic conductivity, excellent mechanical properties, and hydrophilic surface, could be an ideal candidate to improve the lithium storage performance of Mn3O4. Here, a unique flexible, 2D–2D Mn3O4/MXene film is fabricated by assembling 2D Mn3O4 with Ti3C2Tx nanosheets through a simple vacuum filtration approach. In this unique 2D–2D nanostructure, MXene nanosheets buffer the volume change of Mn3O4 during the charge/discharge process. Moreover, the introduction of MXene enables the fabricated 2D–2D nanostructure with excellent flexibility and can be directly used as an electrode for LIBs, which is beneficial for enhancing the energy density of the assembled batteries. As a result, the flexible film of Mn3O4-MXene-8-2 shows excellent lithium storage performances in terms of specific capacity (931 mAh g–1 at 0.05 A g–1), rate capability (624 mAh g–1 at 1 A g–1), and cycling stability, demonstrating its great potential for the application in LIBs.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xingxing Li,Yanan Ma,Yang Yue,Guosheng Li,Chuankun Zhang,Minglei Cao,Yongchen Xiong,Jintao Zou,Yongheng Zhou,Yihua Gao
In recent years, the metal ion hybrid micro-supercapacitor (MSC) comprised of the battery-type Faradaic cathode based electrode and capacitor-type anode based electrode, can realize both high power and energy density, which becomes one of the most hottest areas of energy device. Herein, we demonstrated a zinc-ion hybrid micro-supercapacitor (ZIHMSC) by designing a Ti 3 C 2 T x MXene based electrode as capacitor-type anode and vanadium pentoxide (V 2 O 5 ) based electrode as battery-type cathode. In addition, the polyacrylamide (PAM) hydrogel where ZnSO 4 dissolved was chosen as the electrolyte, which effectively avoids the security risks, unlike other hybrid MSC based on the organic electrolytes. Meanwhile, the flexible ZIHMSC also exhibits well electrochemical properties, displaying a remarkable capacitance (129 mF cm −2 under 0.34 mA cm −2 ), high energy density (48.9 μWh cm −2 at 673 μW cm −2 ) and well-cycle stability (retaining ~ 77% capacitance after 10,000 cycles). This work supports a prospective routine for constructing the new-generation flexible micro-energy storage systems.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Huanmin Liu,Chao Wu,Kangle Lv,Dingguo Tang,Qin Li
Photogenerated charge separation is a challenging step in semiconductor-based photosynthesis. Though numerous efforts have been devoted to developing multi-component photocatalyst heterostructures for improving charge separation efficiency, the short distance between electrons and holes-aggregated regions still leads to undesirable charge recombination. Herein, a facile and commercial in-situ synthesis method was designed to directly prepare a three-component Au–carbon–TiO 2 photocatalyst from Ti 3 C 2 MXene , air, CO 2 , and HAuCl 4 , in which the carbon layer bridged Au and TiO 2 nanoparticles for stable and efficient photocatalytic hydrogen production. Kelvin probe measurements and density functional theory (DFT) calculations demonstrated that a multi-interfacial charge transmission network was successfully constructed to achieve a directional and long-distance spatial charge separation/transfer channel between TiO 2 and Au through carbon layer, desirably inhibiting the recombination of photogenerated charge carriers. The hydrogen production rate of the formed three-component Au/C–TiO 2 (CTA) photocatalyst was demonstrated to be 27 times higher than that of Au–TiO 2 , which also surpassed many reported Ti 3 C 2 MXene-derived carbon–TiO 2 photocatalysts. This work sheds light on the ingenious use of 2D MXene to form a well-behaved TiO 2 -based photocatalytic system and helps to propose future design principles in accelerating charge transfer.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Qingbin Xu,Linchun Shi,Weijun Kong,Jing Wang,Peigen Xiao,Jinxin Liu
A meticulously engineered bacillus-shaped CoNi ZIF-MXene@MWCNT carbon cloth (CC) composite was synthesized through a one-step immersion method, which was employed in the development of a novel electrochemical (EC) sensor for the sensitive detection of salidroside (SAL) in Rhodiola. Characterization of the CoNi ZIF-MXene@MWCNT CC was conducted using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and EC methods. The bacillus-shaped composite showcased an exceptionally high rate of active site exposure, superior conductivity, and electrocatalytic efficiency, attributed to the synergistic effects of the constituent materials. The remarkable electrocatalytic capability facilitated the redox reaction of SAL, marked by a significant enhancement in the current signal. This led to a concentration-dependent response enabling the quantitative detection of SAL. The mechanism of the redox reaction might be the oxidation of the phenolic hydroxyl group of SAL. Demonstrating high sensitivity, selectivity, and stability, this novel bacillus-shaped composite-based EC sensor achieved a low detection limit (LOD) of 0.0958 µ g/mL for SAL, within an effective linear range of 0.5–500 µg/mL. Importantly, the EC sensor proved to be adept at practical detection of SAL in Rhodiola samples with complex matrices, and the salidroside content of Rhodiola crenulata was much higher than that of Rhodiola rosea , indicating that Rhodiola crenulata may have a higher medicinal value, offering a promising avenue for rapid and sensitive detection of SAL.
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DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 45
·455501
·
IF 3.874
Hao Huang,Dan Wang,Ying Zhou,Dongping Wu,Xiaoning Liao,Wanming Xiong,Juan Du,Yanping Hong
Electrochemical sensor has great potential in the detection of small molecules by virtues of low cost, fast response, and easy to miniaturization. However, electrochemical sensing of ochratoxin A (OTA) was seriously hindered by the heavy electrode-fouling effect and poor electrochemical activity inherent from OTA molecular. Herein, two-dimensional titanium carbide (2D Ti3C2) MXene incorporated with carboxylic multiwalled carbon nanotubes (cMWCNTs) was developed as a glassy carbon electrode modifier for rapid and sensitive detection of OTA. Physical characterizations combined with electrochemical techniques revealed that cMWCNTs can not only prevent the restacking of 2D Ti3C2 nanosheets but also facile its electron transfer, leading to a nanohybrid with a high specific surface and good electrocatalytic activity to OTA. Under optimal conditions, the electrochemical sensor showed a good linear response to OTA in a concentration range from 0.09 to 10 μmol·l−1 and a low detection limit (LOD) of 0.028 μmol·l−1. The proposed sensor was impelled successive times to detect OTA, a good repeatability was obtained, indicating the constructed sensor possessed good anti-fouling property. Moreover, satisfactory recoveries between 91.8% and 103.2% were obtained in the real sample analysis of grape and beer, showing that the developed sensing technique is reliable for the screening of trace OTA in food resources.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Houbao Liu,Renli Fu,Xinqing Su,Binyong Wu,He Wang,Yue Xu,Xuhai Liu
For new-generation miniaturized and high-frequency electronics, it is of vital importance to develop advanced electronic packaging materials, which combine high electromagnetic interference (EMI) shielding effectiveness (SE) and efficient thermal management capabilities, including heat absorption, thermal conductivity (TC) and heat dissipation. However, high EMI SE and efficient thermal management usually cannot complement each other for the same packaging material, because EMI shielding devices convert electromagnetic radiation directly into heat consumption, leading to consequent severe challenge to dispose heat dissipation. Herein, we have newly developed a high-performance phase change composites, in which MXene is confined in shape-stabilized phase change material (PCM) for simultaneous achievement of high EMI SE and efficient thermal management. Regarding high EMI, MXene can effectively shield electromagnetic radiation by converting the radiation into heat consumption. As for thermal management, PCM enables efficient heat absorption via the phase change process, and MXene enhances the thermal conductivity (TC) of MXene/PCM composite to facilitate heat dissipation. As a result, our developed MXene/PCM composite can achieve a high EMI SE of 64.7 dB in X-band, with an improved TC of 0.74 W/m·K. Furthermore, the interlayer capillary effect of MXene inhibits the leakage of liquid PCM during the solid-liquid phase transition, which can maintain the PCM shape stability. Our newly-designed shape-stabilized MXene/PCM composites with high EMI SE and large TC shed new light on designing EMI shielding materials with prolonged exposure to electromagnetic radiation, which can be envisioned to exhibit vast implications for advanced new-generation miniaturized and high-frequency electronics.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 37
·12642-12649
·
IF 7.393
Di-Jie Yao,Zhenhua Tang,Li Zhang,Zhi-Gang Liu,Qi-Jun Sun,Song-Cheng Hu,Qiu-Xiang Liu,Xin-Gui Tang,Jianyong Ouyang
Electronic textiles (E-textiles) have received extensive attention for use in human motion detection, wearable electronics, and artificial intelligence. However, fabrication costs and methodology are still key issues preventing the commercialization of highly sensitive and wearable sensors. Here, simple to prepare low-cost conductive MXene-coated airlaid paper (MXene AP) sensors were fabricated via a dip-coating technique for use as electronic skin. The two-layer MXene AP sensors with a three-dimensional structure display high sensitivity (7.65 kPa−1 at 0–3.3 kPa), a broad sensing range (up to 300 kPa), and a stable response for more than 1000 cycles, presenting good sensitivity, repeatability, and durability, and their mechanism was investigated. Furthermore, origami technology can be used to fold MXene AP into an arbitrary shape with good sensing performance, and multistate conformational changes and simulated human touch can also be detected using the resultant three-dimensional (3D) MXene AP sensors. The wearable MXene AP sensors can be used to monitor human body motion and to collect human physical signals sensitively and accurately in the form of electronic skin. These strategies of folding and layering textile-decorated conductive nanomaterials provide a reference for next-generation textile-based wearable electronics and electronic skin.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Lu Luo,Yalan Zhou,Wen Yan,Guanben Du,Mizi Fan,Weigang Zhao
The Ti 3 C 2 T x with excellent conductivity is used in a novel cobalt-based ZIF-67/Ti 3 C 2 T x composites, sulfide derivative (Co 3 S 4 /Ti 3 C 2 T x ) of which is then applied as an active supercapacitor material. The specific capacitance of ZIF-67/Ti 3 C 2 T x is significantly higher than that of unmodified ZIF-67. The sulfide-containing derivatives of these compounds demonstrated pseudocapacitance. The specific capacitance of an electrode containing Co 3 S 4 /Ti 3 C 2 T x as an active material is very high and equal to 602F/g at 1 A/g, which is 2.6 times higher than of a ZIF-67/Ti 3 C 2 T x -containing electrode. The supercapacitor based on Co 3 S 4 /Ti 3 C 2 T x maintained 81.6% of its original capacitance even at 10 A/g current density. Thus, the introduction of Ti 3 C 2 T x into the ZIF-67 improves not only the electrical conductivity of the hybrid material but also its structural stability, which allows to act as support. An asymmetric Co 3 S 4 /Ti 3 C 2 T x //AC supercapacitor (ASC) containing activated carbon (AC) as an anode showed a high energy density equal to 44.9 Wh/kg at 800.3 W/kg power density. This ASC also demonstrated high rate-performance (equal to 79.2%) and excellent cycling stability (with 88.3% capacitance retention and 99.23% Coulombic efficiency after 5000 cycles). The excellent electrochemical performance of our novel composite and conductivity, as well as the stability of its three-dimensional (3D) structure, make it a very promising material for energy storage applications.
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DOI
高影响因子
ACS Catalysis
·
2021
·
IF 13.084
Yanliang Zhou,Yicong Chai,Xiaoyu Li,Zihao Wu,Jian Lin,Yujia Han,Lin Li,Haifeng Qi,Yiming Gu,Leilei Kang,Xiaodong Wang
Selective oxidative dehydrogenation (ODH) of light alkanes to alkenes over metal oxides usually obeys a redox catalysis cycle, where the release and recovery of lattice oxygen play a key role in catalytic performance. Therefore, it remains a challenge to prepare metal oxides with limited reducibility, such as TiO2, as a dominant active component rather than as a support or modifier in this process. Here, we find a significant increase of ethane ODH performance over a layered TiO2 (M-TiO2) catalyst, which is in situ evolved from a Ti3C2Tx MXene material during the reaction. The reactivity of this M-TiO2 is 4 times higher than that of P25 TiO2, with an excellent ethylene productivity of 15.4 gC2H4 gcat–1 h–1 that outperforms the previously reported catalysts. Experimental characterizations and theoretical calculations reveal the importance of Ti and oxygen vacancy defects over M-TiO2 on the conversion of C2H6. The Ti vacancy sites can stabilize the defective structure and increase the reducibility of lattice oxygen to reduce the activation energy barrier of ethane, while the oxygen vacancy sites facilitate the activation of O2 to recover lattice oxygen.
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DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Jing Shang,Luhua Wang,Jihui Cao,Shitong Han,Chao Xu
Flexible devices have shown great application potential in portable and miniaturized devices. However, work on flexible electrodes for capacitive deionization (CDI) has not been well developed due to the issues of desalination property, processability , and availability under actual bending conditions. Herein, we constructed a kind of flexible lamellar MXene membrane by assembling Ti 3 C 2 T x sheets with both crumpled and perforated structures and studied their desalination performance in conventional planar and bent configurations. The crumpled and perforated features in Ti 3 C 2 T x (C-P-TC) nanosheets could optimize the in-plane and out-of-plane diffusion channels of the stacked samples, respectively, effectively improving the accessibility of membranes. As a result, the desalination performance of such C-P-TC electrodes was superior to that of those assembled from crumpled or perforated sheets alone. Significantly, this flexible C-P-TC electrode still showed excellent performance at real bend deformation, which possessed not only almost the same CDI capacity as the traditional planar configuration but also good cycling stability. This work not merely proposes an alternative strategy to improve the CDI performance of lamellar MXene electrodes by regulating the nanostructures of channels but also confirms their effective deionization ability under real bent state, greatly facilitating the potential use of flexible electrodes in miniaturized CDI devices.
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DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Xingmin Liu,Boxiong Zheng,Yutuo Hua,Shaowei Lu,Zhisheng Nong,Jijie Wang,Yutong Song
Highly conductive MXene has attracted extensive focus owing to its notable ability for electromagnetic wave dissipation, but it also suffers from impedance mismatch. Herein, flexibly MXene/rGO aerogel frames (MGs) were construct by direct ink writing (DIW) of low concentration emulsion inks. Adjustment of compositional ratio and structural design could effectively regulate their EWA performances. The results indicate that the printed aerogel frame has an effective absorption bandwidth (EAB) of 8.10 GHz (covering the majority of X-band and entire Ku-band) and a minimum reflection loss (RL min ) of −56.85 dB. In addition, the printed ultralight aerogel frames integrate good mechanical performance and thermal insulation capability. The DIW technique for ultralight MXene-based absorber reveals beneficial inspiration and enlightenment for the structural design and potential application of EMA composites.
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 9
·096504
·
IF 4.316
Xuan Jian,Tong-Tong Wei,Mi-Mi Zhang,Rui Li,Jian-Xin Liu,Zhen-Hai Liang
The design of high-performance catalysts for hydrogen evolution reaction (HER) is urgently needed in the development of renewable energy. Herein, we report a rapid strategy for synthesizing an efficient catalyst with ultralow-Pt nanoclusters on a two-dimensional titanium carbide (Ti3C2Tx) MXene support (denoted as Pt NCs-MXene, 5 μg cm−2) via electrophoretic deposition and cyclic voltammetry. The MXene support not only provides more active sites to anchor Pt nanoclusters (NCs) but also increases the electrochemically active surface area. The electrochemical HER performance of the as-synthesized Pt NCs-MXene catalyst was investigated in an acid electrolyte. The results showed that at a current density of 10 mA cm−2, the overpotential and Tafel slope of the Pt NCs-MXene were 40 mV and 50.8 mV dec−1, respectively, lower than those of the commercial 20 wt% Pt/C catalyst. The turnover frequency and mass activity of the Pt NCs-MXene were 7.09 H2 s−1 and 7.02 A mgPt−1, respectively, which were approximately 70 times those of the Pt/C catalyst. Moreover, the developed catalyst also exhibited a stable hydrogen evolution current for 18 h in a long-term cycling test. This work can provide novel and nontoxic methods for the preparation of low-Pt loading electrocatalysts for high-efficiency HER.
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DOI
高影响因子
危险品化学品经营许可证（带存储）