Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Kang Li,Jiaoqun Zhu,Weibing Zhou,Lilong Sun,Shouqin Tian
To improve the photocatalytic performance of single-phase Bi 2 WO 6 , the heterojunction construction is usually employed to effectively separate and transport photo-induced carriers. Herein, MXene/Bi 2 WO 6 heterojunction (NB2 and VB2) with face-to-face contact and hierarchical structure was constructed by growing ultrafine Bi 2 WO 6 nanosheets on the surface of two-dimensional MXene (Nb 2 C and V 2 C) materials. Compared with the original Bi 2 WO 6 , the hybrids exhibited a larger specific surface area (42.17 m 2 ∙g −1 for NB2, 50.15 m 2 ∙g −1 for VB2), and displayed significant enhancements in the photodegradation of anionic MO (13.8-fold, 6.5-fold), cationic RhB (9.1-fold, 4.5-fold), and neutral phenol (8.5-fold, 6.1-fold), respectively. This is mainly attributed to the heterostructures via face-to-face coupling which can facilitate the tuning of the photoresponsive properties and internal energy level structure, as well as the generation of free radicals ( • O 2 - , • OH, and h + ) for the stepwise redox process in photodegradation. Therefore, this work is expected to expand the diverse use of Non-Ti 3 C 2 MXene in photocatalysis, meanwhile provide important guidance for the harmless treatment of organic pollutants.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2024
·
IF 13
Yu Chen,Mengyao Gao,Kun Chen,Huili Sun,Haonan Xing,Xiaoqing Liu,Weijie Liu,Haizhong Guo
As a kind of flexible electronic device, flexible pressure sensor has attracted wide attention in medical monitoring and human-machine interaction. With the continuous deepening of research, high-sensitivity sensor is developing from single function to multi-function. However, Current multifunctional sensors lack the ability to integrate joule heating, detect sliding friction, and self-healing. Herein, a MXene/polyurethane (PU) flexible pressure sensor with a self-healing property for joule heating and friction sliding is fabricated. The MXene/PU sensitive layer with special spinosum structure is prepared by a simple spraying method. After face-to-face assembly of the sensitive layers, the MXene/PU flexible pressure sensor is obtained and showed excellent sensitivity (150.65 kPa −1 ), fast response/recovery speed (75.5/63.9 ms), and good stability (10 000 cycles). Based on the self-healing property of PU, the sensor also has the ability to heal after mechanical damage. In addition, the sensor realizes the joule heating function under low voltage, and has the real-time monitoring ability of sliding objects. Combined with low cost and simple manufacturing method, the multi-functional MXene/PU flexible sensor shows a wide range of application potential in human activity monitoring, thermal management, and slip recognition.
研究领域:
材料科学
·
柔性电子
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Magnesium and Alloys
·
2022
·
IF 11.813
Haiguang Gao,Rui Shi,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li,Xiaohui Hu
Two-dimensional Ti 3 C 2 T x MXenes exposing different active facets are introduced into MgH 2 , and their catalytic effects are systematically investigated in depth through experimental and theoretical approaches. Excluding factors such as interlayer space, surface functional groups and experimental contingency, the exposed facets is considered to be the dominant factor for catalytic activity of Ti 3 C 2 T x towards MgH 2 . More exposed edge facets of Ti 3 C 2 T x displays higher catalytic activity than that with more exposed basal facets, which also leads to different rate-controlling steps of MgH 2 in the de/hydrogenation process. The low work function, strong hydrogen affinity and high content of in situ metallic Ti for the edge facet contribute the high catalytic activity. This work will give insights into the structural design of two-dimensional Ti 3 C 2 T x MXene used for enhancing the catalytic activity in various fields.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
Nanoscale Horizons
·
2025
·
IF 6.6
Yingjie Zhan,Kun Wu,Wei Xue
Consider that black phosphorene (BP) nanosheets can compensate each other between the MXene layers, thus preventing the agglomeration of MXene, and forming a more compact microstructure. This study successfully synthesizes f-MXene non-covalently modified by the strong electrolyte PHMB. A series of MXene/BP nanocomposite films are prepared by the strong electrostatic interaction between f-MXene and BP nanosheets and verified by FTIR, XRD, and XPS. The cross-section SEM imaging further reveals the formation of densely ordered aligned microstructures. Thanks to the compensation effect of BP nanosheets between f-Mxene layers, and constructed more efficient thermal conductivity pathways. With a low amount (5 wt%) of BP, the in-plane and through-plane thermal conductivity of 5-MXene/BP film increased to 12.71 and 0.37 W m-1 K-1, respectively. TGA and MCC results demonstrate the flexible 5-MXene/BP film exhibited an ultra-low total release rate (5.8 kJ g-1) and excellent thermal stability (66.74 wt% residual carbon). In consideration of their improvement in thermal conductive performance, MXene/BP nanocomposite film can be the most promising candidates for thermal management applications.
研究领域:
材料科学
·
纳米技术
·
热管理材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Chao Wu,Weixin Huang,Huanmin Liu,Kangle Lv,Qin Li
Facing the increasingly serious issues of energy crisis and environmental pollution, it is vital to develop efficient and durable photocatalysis systems for hydrogen (H 2 ) production from water splitting. However, for the famous CdS-based systems, the bottleneck of poor efficiency and low stability arisen from photocorrosion has not been broken through yet. In this study, a ternary composite of CdS , MoS 2 and Ti 3 C 2 MXene with intimately contact interfaces was successfully constructed via an in situ growth method, which exhibited reinforced photocatalytic H 2 -production activity and increased photocorrosion resistant capability. Both of experimental characterizations and density functional theory (DFT) calculations well proved that the photogenerated holes and electrons of CdS timely migrated to Ti 3 C 2 and MoS 2 , respectively. As a consequence, the optimal sample displayed a high H 2 production rate of 14.88 mmol·h −1 ·g −1 with a lifetime of up to 78 h, and the component and structure of the composite were kept intact during the photocatalysis reaction. This work highlights the synergistic effect of the Ti 3 C 2 MXene and MoS 2 as redox dual cocatalysts on the promoted photocatalytic performance and durability of CdS, which can be anticipated to significantly enhance the commercial availability of CdS and even boost its incorporation into industrial applications.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Peng Wang,Chengming Yu,Jiale Huang,Zhudan Jiang,Xinyu Jiang,Shanglin Xiang,Dongyu Cai
Developing an efficient photocatalyst with good recyclability is vital for the sustainability and affordability of photocatalytic technology in the treatment of wastewater. This work demonstrates a facile route for realizing robust TiO 2 @Ti 3 C 2 T x fibers with exceptional photocatalytic capability and recyclability. In this route, an alkalization/de-alkalization process was developed to treat a concentrated Ti 3 C 2 T x suspension known as MXene sediment, followed by a wet spinning process. The pretreatment of Ti 3 C 2 T x suspensions promoted the expansion of the d-spacing of stacked Ti 3 C 2 T x layers in the microfibers. It was found that this was beneficial for increasing the population of TiO 2 nanoparticles grown from Ti 3 C 2 T x layers. The calcination of these fibers was systematically investigated to optimize the photocatalytic performance of TiO 2 @Ti 3 C 2 T x fibers. Thanks to the TiO 2 nanoparticles, the resulting fibrous photocatalysts not only enabled the fast degradation of RhB dyes but also exhibited excellent recoverability from water.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jiani Zhang,Xiaohui Guo,Jian Zhang,Xiaobing Guo,Yuying Xu,Lijuan Chen
Phoxim, extensively utilized in agriculture as an organothiophosphate insecticide, has the potential to cause neurotoxicity and pose human health hazards. In this study, an electrochemical enzyme biosensor based on Ti 3 C 2 MXene/MoS 2 @AuNPs/AChE was constructed for the sensitive detection of phoxim. The two-dimensional multilayer structure of Ti 3 C 2 MXene provides a robust framework for MoS 2 , leading to an expansion of the specific surface area and effectively preventing re-stacking of Ti 3 C 2 MXene. Additionally, the synergistic effect of self-reduced grown AuNPs with MoS 2 further improves the electrical conductivity of the composites, while the robust framework provides a favorable microenvironment for immobilization of enzyme molecules. Ti 3 C 2 MXene/MoS 2 @AuNPs electrochemical enzyme sensor showed a significant response to phoxim in the range of 1 × 10 −13 M to 1 × 10 −7 M with a detection limit of 5.29 × 10 −15 M. Moreover, the sensor demonstrated excellent repeatability, reproducibility, and stability, thereby showing its promising potential for real sample detection.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Metals
·
2024
·Vol. 14
·期 8
·922
·
IF 2.6
Wei Guo,Buxiang Wang,Qing Shu
Hydrogen (H2) is considered to be the best carbon-free energy carrier that can replace fossil fuels because of its high energy density and the advantages of not producing greenhouse gases and air pollutants. As a green and sustainable method for hydrogen production, the electrochemical hydrogen evolution reaction (HER) has received widespread attention. Currently, it is a great challenge to prepare economically stable electrocatalysts for the HER using non-precious metals. In this study, a Co/Co3O4/Ti3C2Txcatalyst was synthesized by supporting Co/Co3O4with Ti3C2Tx. The results show that Co/Co3O4/Ti3C2Txhas excellent HER activity and durability in 1 mol L−1KOH, and the overpotential and Tafel slope at 10 mA·cm−2were 87 mV and 61.90 mV dec−1, respectively. The excellent HER activity and stability of Co/Co3O4/Ti3C2Txcan be explained as follows: Ti3C2Txprovides a stable skeleton and a large number of attachment sites for Co/Co3O4, thus exposing more active sites; the unique two-dimensional structure of Ti3C2Txprovides an efficient conductive network for rapid electron transfer between the electrolyte and the catalyst during electrocatalysis; Co3O4makes the Co/Co3O4/Ti3C2Txcatalyst more hydrophilic, which can accelerate the release rate of bubbles; Co/Co3O4can accelerate the adsorption and deionization of H2O to synthesize H2. This study provides a new approach for the design and preparation of low-cost and high-performance HER catalysts.
研究领域:
材料科学
·
能源化学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Research
·
2023
·
IF 11
Jun Wu,Yinghui Li,Shengshun Duan,Zhehan Wang,Xu Jing,Yucheng Lin,Di Zhu,Wei Lei,Qiongfeng Shi,Li Tao
Temperature sensing is of high value in the wearable healthcare, robotics/prosthesis, and noncontact physiological monitoring. However, the common mechanic deformation, including pressing, bending, and stretching, usually causes undesirable feature size changes to the inner conductive network distribution of temperature sensors, which seriously influences the accuracy. Here, inspired by the transient receptor potential mechanism of biological thermoreceptors that could work precisely under various skin contortions, we propose an MXene/Clay/poly(N-isopropylacrylamide) (PNIPAM) (MCP) hydrogel with high stretchability, spike response, and deformation insensitivity. The dynamic spike response is triggered by the inner conductive network transformation from the 3-dimensional structure to the 2-dimensional surface after water being discharged at the threshold temperature. The water discharge is solely determined by the thermosensitivity of PNIPAM, which is free from mechanical deformation, so the MCP hydrogels can perform precise threshold temperature (32 °C) sensing under various deformation conditions, i.e., pressing and 15% stretching. As a proof of concept, we demonstrated the applications in plant electronics for the real-time surface temperature monitoring and skin electronics for communicating between human and machines. Our research opens venues for the accurate temperature-threshold sensation on the complicated surface and mechanical conditions.
研究领域:
材料科学
·
生物医学工程
·
电子皮肤
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 34
·345402
·
IF 2.9
Ruixue Liu,Sainan Wei,Bao Shi,Yizhi Ma,Luning Sun,Wei Wang
The continuous advancements in wearable electronics have drawn significant attention toward 2D MXenes materials for energy storage owing to their abundant availability, adaptability, and distinctive physicochemical properties. Two unresolved concerns currently revolve around environmental pollution by F-containing etching and finite kinetics caused because of re-stacking of nanosheets. In this study, Al was electrochemically etched from porous Ti2AlC electrodes without the use of fluorine, through a selective electrochemical etching process in dilute hydrochloric acid. Subsequently, Ti2CTx MXene was vertically grown on carbon fiber (CF) substrates. The resulting Ti2CTx@CF electrodes are lightweight, thin, and flexible, exhibiting a surface capacitance of 330 mF cm−2 at a constant current density of 1 mA cm−2 after 2000 cycles. They display a surface capacitance retention of 96.16% and a high energy density of 45.3 μWh cm−2 at a power density of 0.497 mW cm−2. These metrics underscore the Ti2CTx@CF electrode's commendable multifunctionality, electrochemical performance, ion transport efficiency, and charge storage capacity. Moreover, a flexible energy storage electrode material with a high area capacity was developed by combining Ti2CTx MXene nanosheets, possessing a large specific surface area, with a flexible carbon fabric substrate.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jie Gao,Li-Bo Huang,Xianghao Meng,Lei Xia,Fan Yi,Zexuan He,Zeyu Pei,Changting Hong,Guo Wang,Yuhan Wang,Zhongyi Jiang
Nanofiltration holds significant potential for mitigating water scarcity, yet reconciling high selectivity with efficient mass transfer remains a critical challenge. MXene membranes enable precise molecular sieving through interlayer spacing, while covalent organic framework (COF) membranes leverage penetrating pores for rapid mass transfer. However, MXene membranes suffer from restricted permeability and structural instability, whereas COF membranes face limitations in achieving small-sized pores and compromising sieving efficiency. Herein, we fabricate a heterostructured MXene/COF membrane by synergistically manipulating interlayer spacing of MXene with penetrating pores of COF via sequential vacuum-assisted self-assembly. Matched surface hydrophilicity and electrostatic property between MXene and COF render robust interfacial adhesion. The optimal MXene/COF membrane exhibits a water permeance of 356.6 ± 24.1 L m −2 h −1 bar −1 and a CR rejection of 99.8 %, along with excellent operational stability during 48-hour continuous filtration. The MXene/COF membrane opens a novel avenue for fabricating versatile heterostructured membranes for advanced separations.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2019
·
IF 3.683
Xuelian Yu,Wenchao Yin,Tao Wang,Yihe Zhang
One of the major challenges associated with fuel cells is exploring highly efficient and low-cost electrocatalysts for the oxygen reduction reaction (ORR). Herein, the feasibility of using Ti3C2 MXene nanoparticles (NPs) to enhance the electrocatalytic activity of g-C3N4 for ORR was investigated. By varying the content of Ti3C2 NPs, a series of g-C3N4/Ti3C2 heterostructures were obtained, displaying enhanced electrocatalytic activity, including a positive shift in both onset and peak potentials toward ORR, compared to the original g-C3N4 in basic solution. We attribute the improvement to the favorable electrical conductivity of well-dispersed Ti3C2 MXene nanoparticles and also enhanced O2 adsorption due to the electronic coupling effect between g-C3N4 and Ti3C2 in the heterostructures. This work demonstrates the potential of earth-abundant MXene family materials to construct low-cost and high-performance electrocatalysts.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）