SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zhixin Su,Na Tao,Siren Li,Wenyong Jiang,Miaojia Pan,Hongyuan Zhang,Zhaoxu Wang,Hu Zhou,Tiefan Huang
MXene nanomaterials have emerged as promising materials for membrane design due to their distinctive chemical functionalities and tunable lamellar architecture. However, weak interlayer interactions between adjacent nanosheets often lead to membrane swelling and even redispersion in solvents, thereby compromising their performance in liquid separation. Although conventional crosslinking methods can alleviate these issues, they often cause an irreversible alteration of the interlayer spacing, which hinders precise molecular sieving. To address these challenges, we developed an in-situ disulfide crosslinking strategy for fabricating MXene membranes, in which chemical modification and crosslinking occur after membrane formation. As a result, the interlayer spacing of the crosslinked membrane remains virtually identical to that of the pristine membrane. Thanks to the crosslinked structure, the membranes maintain their structural integrity even under sonication. This well-defined microstructure enables size-selective molecular sieving capability. Moreover, leveraging the reversibility of disulfide bonds, the membrane exhibits excellent recyclability, achieving a nanosheet recovery rate of 88.4 %. This in-situ crosslinking strategy not only provides a sustainable pathway for advancing MXene-based membranes in water purification but also shows great potential for application with other two-dimensional materials to prepare high-performance membranes.
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高影响因子
DESALINATION
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2022
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IF 11.211
Yu-yu Yao,Ting Wang,Li-guang Wu,Hua-li Chen
To improve the flux, anti-fouling and dye separation performance of PES-based membranes, PES mixed-matrix membranes (MMMs) blended with ZIF-8@Ti 3 C 2 T x composites were fabricated via a facile one-pot microemulsion strategy. The introduction of hydrophilic components in the microemulsion into the PES matrix enhanced the pore structures and surface polarity of the resulting MMMs, causing them to exhibit high permeation and anti-fouling performance compared to both neat PES and MMMs with ZIF-8. The optimal membrane flux and anti-fouling performance were found to be 280 L·m −2 ·h −1 and 91 % (bovine serum albumin rejection), respectively, at 3 % microemulsion content. The well-distributed ZIF-8@Ti 3 C 2 T x composites in the MMMs interact with dye molecules, which strengthens the dye retention from high-salinity wastewater. Further, the pore size of the MMMs was positively correlated with the flux but negatively correlated with dye retention. In particular, the M-3 membrane exhibited high flux (140 L·m −2 ·h −1 ) and up to 98 % dye rejection in high-salinity wastewater, but its rejection of salt ions was <5 %. In addition, the dye rejection recovery rate of M-3 after each washing exceeded 93 % over 5 fouling/backwashing cycles. These results strongly suggest that MMMs incorporated with ZIF-8@Ti 3 C 2 T x composites have promising application prospects for removing trace dye pollutants from high-salinity wastewater.
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高影响因子
ACS Applied Polymer Materials
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2022
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IF 4.855
Chenguang Jiang,Wenyuan Xie,Defeng Wu
Solvent replacement is an effective strategy to improve the freezing resistance of hydrogels. The physicochemical properties of those organics are key to the overall performance of as-obtained organohydrogels. In this work, we performed a comparative study to explore the relationships between the types of solvents with similar chemical structures and the intrinsic properties of the organohydrogels. Poly(vinyl alcohol)/MXene composite hydrogel was used as a template, and three types of alcohols (ethanol, ethylene glycol, and glycerol) were used as exchange solvents. A “2-varible/5-outputs” method was developed, and the overall performance of as-obtained organohydrogels was optimized in terms of alcohol types and weight retention ratios. The organohydrogel containing ethanol with 50% weight retention ratio showed balanced properties: optimized modulus and good strength, superior compliance and recovery efficiency, high strain sensitivity, and wide detection range, which was more suitable to detect human motions. This work can provide valuable information on fabricating organohydrogels with optimized overall properties for flexible strain sensors.
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高影响因子
DESALINATION
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2024
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IF 8.3
Xushuai Chen,Panpan Zhang,Xi Chen,Chunjia Luo,Min Chao,Luke Yan
Solar interfacial evaporation represents a highly promising approach for generating potable water from seawater utilizing clean, abundant, and sustainable solar energy. MXene-based materials exhibit outstanding photothermal conversion in desalination applications but face challenges in water transport and salt removal. Here, we introduce an effective MXene-charge gradient hydrogel (MCGH) evaporator that leverages the Donnan effect for salt rejection and internal osmotic pressure for water conveyance. The MCGH evaporator achieved 3.1 kg m −2 h −1 evaporation rate in 3.5 wt% NaCl under 1 sun irradiation. It also operates effectively in concentrated brines, reaching a notable 2.1 kg m −2 h −1 evaporation rate in 20 wt% NaCl solutions. This work introduces a new approach for salt-tolerant MXene photothermal evaporators, holding great promise for sustainable solar desalination applications.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yu Jiang,Rong Yang,Chaojiang Fan,Xin Dong,Hongyu Shang,Lei Mao,Bailing Jiang,Yinglin Yan
As one of the most important prerequisites for the practical application of lithium-sulfur (Li-S) batteries, the efficient utilization of active materials still meets the challenge to activate the dissolved polysulfide between the cathode side and the separator. The MXene has metallic centers and rich surface functions to anchor polysulfides, which prevent the shuttle of polysulfides, is widely used in Li-S batteries. However, the self-stacking defects of MXene hinder its chemisorption and catalytic of polysulfides. Here, a plain, scalable additive plug-in scheme was designed for MXene, and the self-supporting film obtained by dual-intercalation supplied an interlayer for Li-S batteries. The macromolecular cetyltrimethylammonium bromide is used to open the layer distance of MXene and expose the catalytic sites, and the nanometer carbon nanotubes are employed as the second insertion to distribute the conductive carbon networks on the MXene nanosheets to physically confine the polysulfides. The functional interlayer carries adsorption and catalytic activities toward polysulfides conversion. Therefore, the Li-S batteries with the interlayer had an initial discharge specific capacity of 1491.8 mA h g −1 at 0.1 C, and an ultra-low-capacity decay of 0.038% per cycle after 500 cycles at 1 C. This work provides an effective strategy on MXene to construct functional intermediate layer for Li-S batteries to hinder the shuttling effect and catalyze the redox conversion of the polysulfides.
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高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Saleem Ullah Saleem,Yanhua Liu,Jing Sui,Geoffrey I.N. Waterhouse,Zhiming Zhang,Liangmin Yu
For electrochemical Pb 2+ detection, high sensitivity and stability are essential owing to the mutagenicity, carcinogenicity, and teratogenicity of aqueous Pb 2+ ions. Herein, a three-dimensional bismuth-containing metal-organic framework (Bi-MOF) was synthesized using a hydrothermal method, followed by post-synthetic functionalization with thiol (-SH) groups. A sandwich-type Bi-MOF-SH/Mx/Bi-MOF-SH/GCE multilayer sensitive electrochemical sensor was then constructed on the surface of the glassy carbon electrode for Pb 2+ detection. Differential pulse anodic stripping voltammetry (DPASV), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) were used to evaluate the performance of the sensor. The developed multilayer sensor demonstrated an exceptionally high current response, good sensitivity (0.03–20.0 μg/L), and an ultra-low level of detection of 0.012 μg/L (S/N=3) towards Pb 2+ ions. The as-prepared electrode showed high stability, repeatability, and selectivity among possible interfering ions (Na + , Ca 2+ , Cu 2+ , Zn 2+ , K + , Mg 2+ , Al 3+ , and Cd 2+ ), suggesting potential for use in real-world applications.
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高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Ying Liu,Yubo Zhao,Changtu Ma,Min Zhao,Huayun Du,Yang Ge,Jianlong Ji,Kexun Li,Yanxia Wu
Ti 3 C 2 T x MXene has been regarded as a promising candidate for advanced microwave absorption materials. However, the microwave absorbing performance of Ti 3 C 2 T x MXene is suppressed by the single dielectric loss mechanism and impedance mismatch because of the high conductivity. To effectuate a good absorption capability of Ti 3 C 2 T x MXene, this paper constructs a heterostructured Co/Ti 3 C 2 T x hybrid by atomic layer deposition of magnetic Co nanoparticles on Ti 3 C 2 T x nanosheets . The microstructures, magnetism , and microwave absorption behaviors of the Co/Ti 3 C 2 T x hybrids are investigated systematically. The results show that the frequency-dependent electromagnetic parameters of the Ti 3 C 2 T x MXene become tunable by controlling the content of Co decorations, which are conducive to both magnetic loss and impedance matching . The Co/Ti 3 C 2 T x hybrid with ultralow Co decoration content (only 1.52 wt%) achieves the minimum reflect loss of −54.32 dB at a thin matched thickness of 1.29 mm, and the corresponding effective absorption bandwidth with reflection loss below −10 dB reaches 4.29 GHz. The atomic layer deposited magnetic metal nanostructures provides an effective strategy for preparing MXene-based hybrids which not only have high absorption efficiency but also significantly reduce the use of magnetic metals.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Jian Zhang,Chen Shao,Zhen Lei,Yuanchun Li,Haina Bai,Lanhe Zhang,Guangqin Ren,Xinyan Wang
Due to inherent limitations such as high carrier recombination efficiency, limited active sites, and suboptimal utilization of visible light, graphite-like carbon nitride (g-C 3 N 4 ) has constrained its widespread application in water treatment within photocatalytic systems. In addressing this issue, the present study employed acid etching and sonochemistry to fabricate a Ti 3 C 2 -SO 3 H/g-C 3 N 4 (TiCSOHCN) composite photocatalyst for the removal of tetracycline hydrochloride (TC). The amalgamation of Ti 3 C 2 -SO 3 H (TiCSOH) with g-C 3 N 4 engendered the establishment of a discernible Schottky barrier, facilitating an expedited electron transfer rate. Photocatalytic degradation experiments demonstrate that, compared to individual components, the TiCSOHCN composite photocatalyst exhibits significantly enhanced photocatalytic activity. The removal efficiency of TC reaches 75.42% within 2 h, and even after five cycles of experimentation, the degradation efficiency remains close to 70%, indicating excellent stability. The augmentation can be predominantly ascribed to the cooperative influence arising from the synergy between Ti 3 C 2 -SO 3 H and g-C 3 N 4 . The augmentation of visible light responsiveness in g-C 3 N 4 , achieved through its modification with TiCSOH, resulted in the mitigation of photoelectron-hole pair recombination, consequently leading to an amelioration in the photocatalytic efficacy of the TiCSOHCN composite catalyst. Intermediate species arising from the degradation of tetracycline were discerned utilizing LC-MS, and conjectures regarding plausible degradation pathways were postulated. Evaluations of the ecotoxicological impact of tetracycline and its intermediates indicated a progressive diminution in toxicity throughout the course of the photocatalytic degradation process. Furthermore, through free radical capture and EPR tests, it was confirmed that ·O 2 – and ·OH are the primary active species responsible for the photocatalytic degradation of TC, substantiating the proposed rational photocatalytic degradation mechanism. This research provides an innovative approach to developing high-performance and stable photocatalysts.
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高影响因子
ENERGY
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2025
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IF 9.4
Ziyang Zhu,Nan He,Dong Wang,Qicheng Chen,Yingjin Zhang,Bingjian Nie
MoS 2 is considered a highly promising anode material for supercapacitors owing to its distinctive two-dimensional structure. However, its relatively low electrical conductivity restricts its further development and practical application. For the purpose of addressing this issue, this study reports the first synthesis of a CuO@MoS 2 /MXene ternary heterostructure based on hollow CuO. The formation of the built-in electric field, along with the redistribution of local charge, facilitates the transformation of 2H-MoS 2 into highly conductive 1T-MoS 2 . In addition, the three-dimensional crosslinked network structure formed by the highly conductive MXene and MoS 2 layers offers additional storage capacity for electrolyte ions, thereby further enhancing the energy storage density of the material. This negative material exhibits a maximum specific capacitance of 1435.2 F g −1 , which is significantly higher than that of most reported MoS 2 -based negative materials. The synergistic support provided by the porous CuO substrate and the MXene layer effectively inhibits the lamellar aggregation of MoS 2 , thereby achieving a capacitor retention rate of 90.1 % after 5000 charge-discharge cycles. The asymmetric supercapacitor constructed from the material achieves a maximum energy density of 91.4 Wh·kg −1 , demonstrating excellent application potential in various fields. This study addresses the research gap concerning negative electrode materials for high specific capacitance MoS 2 -based supercapacitors and offers a novel approach to further enhancing the energy density of supercapacitors.
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高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Shiyao Yan,Shiping Shao,Yunxiang Tang,Xin Zhang,Chan Guo,Luxue Wang,Jiurong Liu,Lili Wu,Fenglong Wang
Aerogel-based composites, renowned for their three-dimensional (3D) network architecture, are gaining increasing attention as lightweight electromagnetic (EM) wave absorbers. However, attaining high reflection loss, broad effective absorption bandwidth (EAB), and ultrathin thickness concurrently presents a formidable challenge, owing to the stringent demands for precise structural regulation and incorporation of magnetic/dielectric multicomponents with synergistic loss mechanisms within the 3D networks. In this study, we successfully synthesized a 3D hierarchical porous Fe3O4/MoS2/rGO/Ti3C2Tx MXene (FMGM) composite aerogel via directional freezing and subsequent heat treatment processes. Owing to their ingenious structure and multicomponent design, the FMGM aerogels, featured with abundant heterogeneous interface structure and magnetic/dielectric synergism, show exceptional impedance matching characteristics and diverse EM wave absorption mechanisms. After optimization, the prepared ultralight (6.4 mg cm–3) FMGM-2 aerogel exhibits outstanding EM wave absorption performance, achieving a minimal reflection loss of −66.92 dB at a thickness of 3.61 mm and an EAB of 6.08 GHz corresponding to the thickness of 2.3 mm, outperforming most of the previously reported aerogel-based absorbing materials. This research presents an effective strategy for fabricating lightweight, ultrathin, highly efficient, and broad band EM wave absorption materials.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Dianchun Qiu,Kai Zheng,Tuxiang Guan,Zemei Li,Juan Peng,Qing Tao,Kelan Yan,Ningzhong Bao
Flexible supercapacitor is highly important to future wearable textile electronics and metaverse technologies, yet they are still limited by their unfulfilled specific capacitance and energy density . Here, a MXene (V 2 CT X ) based fiber fabric (MFF) was developed via a synergistic flow driven assembly strategy for high-performance supercapacitors . Adapted through reliable approaches of indirect etching, organic cation intercalation, and wet spinning, the MFF presents rich active sites, ordered paths, a moderate specific surface area (41.1 m 2 g −1 ), good flexibility and reproducibility. Admirably, the resulting fibrillar meshwork structure was found to be highly conducive to increasing energy density and reducing the electrochemical polarization. In this regard, a relatively good capacitance of 731 F g −1 is achieved at a current density of 0.5 A g −1 in H 2 SO 4 electrolyte. Furthermore, the assembled asymmetric solid-state supercapacitor (FSC) exhibits high specific capacitance of 401.2 F g −1 at 0.5 A g −1 , long cycle stability (5000 cycles) and high mechanical flexibility (5000 bending cycles). Benefiting from this outstanding electrochemical performance , the FSCs using EMIBF 4 /PVDF-HFP as electrolyte can be implied as reliable power source to flexible displaying and health monitoring. This work provides a novel MXene (V 2 CT X ) based fiber fabric for constructing flexible electrode, promising to open an avenue toward wearable devices.
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高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Qingping Xin,Tao Huang,Shuo Li,Ningning Gao,Huimin Jin,Hao Chen,Lei Zhang,Hui Ye,Hong Li,Yuzhong Zhang
The membrane separation approach has garnered considerable interest in the area of CO2 separation due to its advantages of requiring little electricity and a wide range of applications. Here, we report the preparation of pSBMA@Ti3C2Tx nanosheets functionalized with poly(amphiphilic poly(methacryloyloxyethylsulfobetaine) (pSBMA)) by precipitation distillation, weighing of pSBMA@Ti3C2Tx nanosheets with different mass ratios to be added into cross-linked poly(ethylene oxide) (XLPEO), and preparation of a continuous, thin mixed-matrix membrane (MMM). Under gas humidification, the membrane showed the best permeation performance. Due to the richness of hydrophilic organosulfate groups (−SO3–) and quaternary amine groups [−N+(CH3)3] in pSBMA, the overall water content of the MMMs is increased, which greatly improves the CO2 permeability. Enhancing the ratio of bound water augments the membrane’s capacity to segregate CO2/N2. Under coordination of water molecules, quaternary amine groups effectively promote the quick delivery of CO2 in the membrane. In the wet state, the XLPEO/pSBMA@Ti3C2Tx-0.2 membrane has a CO2/N2 selectivity of 27.5 and a CO2 permeability of 4953 barrer, an improvement of 87% and 109%, respectively, compared to those of the XLPEO pure membrane, breaking the 2008 Robeson upper limit and approaching the 2019 upper limit. We also studied the change of the gas separation performance of the membrane under different pressures.
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高影响因子
危险品化学品经营许可证（带存储）