DESALINATION
·
2025
·
IF 9.8
Zezhen Zhang,Zekun Zhou,Shuman Feng,Lili Wu,Shanjun Gao
Membrane-based separation technologies often face a trade-off between selectivity and permeability, which represents a significant technical challenge in current research. In this study, vacuum-assisted surface deposition technology was utilized to co -deposit piperazine (PIP) and MXene onto a polyvinylidene fluoride (PVDF) microfiltration membrane. This was followed by interfacial polymerization, initiated by trimesoyl chloride (TMC), to form a polyamide (PA) network, resulting in the fabrication of a conductive thin-film nanocomposite membrane (CTFN-2). The results showed that the CTFN-2 membrane had a uniform PIP-TMC/MXene coating with a distinctive wrinkled structure on its surface, contributing to its high permeate flux and solute rejection. The membrane's separation performance was evaluated using a custom-built low-pressure cross-flow conductive membrane setup. The CTFN-2 membrane selectively rejected various ionic dyes under both positive and negative voltages, with an increased rejection rate for inorganic salts as the voltage rose. Notably, after being stored in deionized water for 180 days, the CTFN-2 membrane maintained stable dye separation performance. This research offers a novel approach for developing efficient and controllable separation membrane materials.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Xin Wang,Shuai Lin,Haiyun Tong,Yanan Huang,Peng Tong,Bangchuan Zhao,Jianming Dai,Changhao Liang,Hai Wang,Xuebin Zhu,Yuping Sun,Shixue Dou
Two-dimensional (2D) MXenes such as Ti 3 C 2 , Ti 2 C, Mo 2 C, and Mo 1.33 C have shown excellent electrochemical performances as supercapacitor electrodes, and the exploration of new and/or high-capacity MXene-based supercapacitor electrode materials is an active field. In this work, 2D multi-layered V 4 C 3 MXene has been synthesized by selectively etching Al from V 4 AlC 3 and it shows a high capacitance of 209 F g −1 at 2 mV s −1 , good rate performance, and stable long cyclic performance with capacitance retention rate of 97.23% after 10000 cycles at 10 A g −1 in 1 M H 2 SO 4 . Importantly, the pseudocapacitance (∼100.1 F g −1 ) accounts for about 37% of the total capacity (∼268.5 F g −1 ) for V 4 C 3 MXene electrode. Therefore, the high specific capacitance of V 4 C 3 MXene is not only due to their wide interlayer spacing (∼0.466 nm), large specific surface areas (∼31.35 m 2 g −1 ) and pore volumes (∼0.047 cm 3 g −1 ), and good hydrophilicity but also attributed to the abundant valence states of vanadium (+2, +3, and +4). The high rate performance and excellent cycling stability of V 4 C 3 MXene electrodes are mainly attributed to the high electronic conductivity (1137 S m −1 at 300 K). The present work provides another promising MXene-based supercapacitor electrode material.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Minglu Tang,Yangtian Shi,Liang Lu,Jingqi Li,Zhaocong Zhang,Jiatong Ni,Wenxin Wang,Yanhua Zhang,Tiedong Sun,Zhiguang Wu
Nanozymes, which have enzymatic activity and physicochemical properties of nanomaterials, have attracted extensive attention in the field of tumor therapy. However, the low activity of nanozymes in the tumor microenvironment leads to limited therapeutic effects. Here, we report an MXene-integrated nanozyme that exhibits dual catalytic activities, exerting synergistic effects to enhance tumor therapy. The MXene-integrated nanozyme consists of CeO 2 nanozymes with dual enzyme-like activities (simulating catalase and peroxidase) loaded on MXene. In such a construct, the catalase- and peroxidase-like activity of CeO 2 nanozymes alleviates hypoxia and elevates oxidative stress in the tumor microenvironment, and the overexpressed glutathione (GSH) is consumed by the redox reaction of CeO 2 nanozymes. The CeO 2 nanozyme-loaded MXene could couple the photothermal effect and dual enzyme-like activities, resulting in enhanced tumor nanocatalytic therapy with a tumor growth inhibition (TGI) effect of 92%. Dual active nanozyme-loaded MXene is a promising material for the development of nanozyme catalytic therapy in the future.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Yangjin Dong,Shanshan Li,Xiaoyun Li,Xiaoying Wang
Smart hydrogels responsive to minimally invasive near-infrared (NIR) light have great potential in localized drug delivery for cancer treatment, but they still show some limitations such as low photothermal conversion, poor photothermal stability, and improper temperature range in biomedical applications. In this paper, the two-dimensional MXene nanosheets with high photothermal conversion efficiency as well as photothermal stability was firstly prepared, then the MXene nanosheets and the therapeutic drug were embedded in the low-melting-point agarose hydrogel network to fabricate the drug-loaded MXene/agarose hydrogel (MXene@Hydrogel). With the addition of low concentration of MXene (20 ppm), the MXene@Hydrogel could quickly rise to 60 °C under NIR irradiation and melt to release the encapsulated drugs. Importantly, the drug on/off release and the kinetics could be easily controlled with varied agarose concentration, MXene concentration, light intensity, and exposure time. In addition, the drug doxorubicin retained the anticancer activity after released from the MXene@Hydrogel network under NIR irradiation. With the excellent biocompatibility, the newly fabricated NIR-responsive MXene@Hydrogel offers a novel way for the development of smart hydrogel-based drug delivery system for localized cancer treatment.
研究领域:
生物医学工程
·
材料科学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 21
·2885
·
IF 5.3
Jie Yang,Shilin Zhu,Hongli Zhang
Two-dimensional (2D) nanomaterial-based membranes feature attractive properties for molecular separation and transport, which exhibit huge potential in various chemical processes. However, the low permeability and bio-fouling of the MXene membrane in water treatment become huge obstacles to its practical application. Herein, a highly permselective and anti-bacterial 2D nanofiltration membrane is fabricated by intercalating a polycation of polydiallyldimethylammonium chloride (PDDA) into the Ti3C2TxMXene laminar architecture through a facile and patternable electrostatic assembly strategy. As a result, the as-fabricated Ti3C2Tx/PDDA composite membrane exhibits higher water permeance up to 73.4 L m−2h−1with a rejection above 94.6% for MgCl2. The resultant membrane simultaneously possesses good resistance to swelling and long-term stability in water environments, even after 8 h. Additionally, the Ti3C2Tx/PDDA membrane also demonstrates a high flux recovery ratio of nearly 96.1% to bovine serum albumin proteins after being cleaned. More importantly, the current membrane shows excellent anti-adhesive and anti-microbial activity against Gram-negativeEscherichia coli(E. coli) and Gram-positiveStaphylococcus aureus(S. aureus), with inhibition rates of 90% and 95% againstE. coliandS. aureus, respectively. This holds great potential for the application of the polyelectrolyte-intercalated MXene membrane in serving as a promising platform to separate molecules and/or ions in an aquatic environment.Keywords:Ti3C2Tx;MXene membrane;nanofiltration;two-dimensional membrane;anti-biofouling;PDDA
研究领域:
材料科学
·
环境科学
·
生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemElectroChem
·
2020
·Vol. 7
·期 3
·821-829
·
IF 4.154
Xingxing Li,Yanan Ma,Peizhi Shen,Chuankun Zhang,Jinfeng Yan,Yingbo Xia,Shijun Luo,Yihua Gao
Graphical A self-healing microsupercapacitor (MSC) based on size-dependent 2D MXene is reported by spray-coating and laser-engraving methods, which is simple, low-cost and large-scalable. Compared with the larger-MXene and mix-MXene (smaller and larger nanosheets 1 : 1 mass ratio), the smaller-MXene-based MSCs exhibit the highest capacitance of 73.6 mF/cm 2 . The MXene-based-MSCs present an excellent self-healing ability with capacitance retention of 90 % over 2000 charge/discharge cycles after 5 th cutting/healing. Very recently, 2D MXene has attracted a lot of attention in energy storage, due to its large specific surface area, good hydrophilicity, good conductivity and adjustable composition. Herein, we reported a kind of self-healing microsupercapacitors (MSCs) based on size-dependent Ti 3 C 2 T x MXene. Due to the rich physicochemical properties of Ti 3 C 2 T x , the MSCs were fabricated by firstly spraying different lateral size MXene nanosheets onto the cellulose paper, and then selectively engraving interdigital electrodes by laser engraving machine. The flexible MXene-based MSCs were assembled by sulfuric acid-polyvinyl alcohol electrolyte. It is observed the electrochemical performance of MXene-based MSCs is significantly affected by the nanosheet size. And the capacitance of MSCs fabricated by smaller lateral nanosheet reached up to 73.6 mF/cm 2 , which is higher than that of the larger lateral nanosheet and mixture one that contains smaller and larger nanosheets (1 : 1 mass ratio). Moreover, the self-healing MXene-based MSCs fabricated with polyurethane containing large number of hydrogen bonds as the wrapped material, present an excellent self-healing ability with capacitance retention of 90 % over 2000 charge/discharge cycles after 5 th cutting/healing. And MXene-based MSCs display great potential in the field of energy storage, which not only turn on the LED light but also drive the electronic clock.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 21
·12763-12771
·
IF 12.732
Fa-Qian Liu,Xin Liu,Lishui Sun,Rongxun Li,Chun-Xiao Yin,Bozhen Wu
Polyamine-based solid adsorbents are promising candidates for CO2 capture, but long-term stability under practical regeneration conditions (100% CO2 at 120 °C) remains the biggest hurdle. In this paper, we prepared MXene-supported adsorbents with excellent long-term stability by combining two strategies. First, 1,2-butylene oxide (BO) with an epoxy group was grafted onto polyethyleneimine (PEI) to suppress the formation of urea. Second, Ti3C2(OH)x MXene was used as the support of polyamines to improve the wear resistance and thermal conductivity. The prepared MXene-supported adsorbents exhibit a large working capacity (2.6 mmol g−1) and a very stable cycling stability because of the synergetic effect. The adsorbents also exhibit a very low regeneration heat of 1.90 MJ per kg (CO2) and a high mechanical stability against attrition (0.26% after 5 h time-on-stream). Thus, these MXene-supported adsorbents make the CO2 capture process promising.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Wu Wang,Tianjiao Cai,Zhongjun Cheng,Yuqi Yang,Jingfeng Wang,Jianxin Tang,Li Tang,Wen Feng,Yuyan Liu,Zhimin Fan
Stimulus-responsive MXene films demonstrate extensive application scenarios, such as artificial muscles and biomedical devices. However, the shape deformation of such materials entails continuous stimulation, thus limiting their implementation in specific fields when temporary shapes have to be maintained without external stimuli. This work fabricates a kind of shape-programmable MXene-based supermolecular nanocomposite film by integrating MXene and polyvinyl alcohol. In this film, MXene provides extra intermolecular hydrogen bond interaction between polyvinyl alcohol and acts as cross-linking points in the nanocomposite, thus endowing this film with a good shape-fixing property. Furthermore, with the osmotic plasticization of water on the polyvinyl alcohol chains, the as-prepared nanocomposite film demonstrates excellent water-responsive shape-memory performance. This material cannot only overcome the inability of traditional stimulus-responsive MXene films to maintain temporary structures without continuous stimulation, but also expands potential applications in some fields including controlled release and intelligent bio-robots.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yufei Wang,Zong Lu,Mide Luo,Ziqi Zhao,Yanying Wei,Haihui Wang
The recovery of uranium from nuclear wastewater holds considerable importance in safeguarding water resources and addressing the issue of nuclear energy scarcity. Recently, modified MXenes have emerged as a promising adsorbent for U(VI)-containing wastewater due to their abundant active sites and exceptional radiation resistance, but the incorporation of costly functional molecules is usually necessary to yield satisfactory performance. In this work, we synthesized a novel kind of nano-porous Ti 3 C 2 T x MXene nanosheets using a simple pore-creating method with Cu 2+ as catalysts, which were tested for U(VI) elimination. Impressively, the U(VI) adsorption capacity (299 mg/g) of the porous MXene nanosheets surpassed that of most previously reported modified MXene and other materials. Meanwhile, Pseudo-second-order kinetics and Freundlich models provided suitable descriptions of the adsorption process, indicating heterogeneous chemisorption occurred. Experimental and spectral analysis suggested that the enhanced U(VI) adsorption capacity of the porous MXene nanosheets primarily benefited from more active OH groups on their surface to form bidentate coordination with U(VI). This work provided a valuable concept for preparing new MXene-based adsorbent for uranium removal.
研究领域:
材料科学
·
环境科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Hui Zong,Ruijuan Qi,Ke Yu,Ziqiang Zhu
Hydrogen evolution is of great significance for reducing carbon emissions and realizing carbon-neutral. Hydrogen evolution reaction (HER) by water splitting has no carbon emissions and pollution, but it is still necessary to reduce cost and enhance catalytic activity. Herein, we report an ultra-thin Ti 2 NT x MXene-wrapped metal-organic frameworks (MOFs)-derived CoP composite (Ti 2 NT x @MOF-CoP), which is a bifunctional catalyst with low cost and high activity. We synthesize the Ti 2 NT x @MOF-CoP composite by phosphating the precursor ZIF-67 self-assembled with Ti 2 NT x MXene nanosheets. The Ti 2 NT x @MOF-CoP electrode shows competitive hydrogen evolution performance in a wide pH-range (current density of 10 mA cm −2 ) and has a low overpotential ( η ) of 112 mV in pH = 14 especially. The Ti 2 NT x @MOF-CoP electrode for OER also has a low η = 241 mV at 50 mA cm −2 . Based on the bifunctional activity of Ti 2 NT x @MOF-CoP in alkaline, we set a dual-electrode configuration for HER and OER. It has a bias of 1.61 V at 10 mA cm −2 , with impressive catalytic stability during a 20 h measurement. MOFs-derived CoP has a large specific surface area and strong catalytic activity. Ti 2 NT x as a novel member of the MXene family not only can increase the active sites, but also can improve the stability of heterojunction catalysts. It reveals that the Ti 2 NT x @MOF-CoP composite has great potential in hydrogen evolution and water oxidation, thus reducing carbon emissions and protecting the environment.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 14
·8871-8886
·
IF 4.22
Pi Menghan,Jiang Lichao,Wang Zhisen,Cui Wei,Shi Lingying,Ran Rong
As a new two-dimensional material, MXene has caused extensive research in field of supercapacitor, electromagnetic shielding, strain sensing field due to its excellent mechanical properties and electrical conductivity. MXene with good water dispersibility can be used as an ideal nano-material to enhance the conductivity of hydrogels. However, MXene is easy to accumulate in the hydrogel system, and there are rare articles on MXene hydrogels. In this paper, we combine cellulose nanocrystals (CNCs) and MXene to prepare CNC/MXene nanosheets and take advantage of CNC’s excellent dispersibility in water and the electrostatic repulsion between CNCs to avoid the accumulating of MXene and enhance the mechanical properties of the hydrogel. Based on it, we prepared a physical–chemical double crosslinking and double-network CNC/MXene hydrogel by in situ polymerization and cycle freeze-thaw method. The CNC/MXene hydrogel we prepared exhibited excellent mechanical properties; it could be stretched to 7 times its original length and could reach 1.025 MPa tensile stress. When the compression strain was 80%, the compression stress could reach 1.1 MPa. After unloading the compression pressure, it could rapidly return to its original length within 0.17 s, which would impact greatly on the practical application of CNC/MXene hydrogel. What's more, the conductivity of it was up to 0.4 S/m and the thermal conductivity was 0.38 W/mK. So, the hydrogel prepared by us has a wide range of application prospects in the fields of human motion monitoring, electronic skin, man–machine interface, etc.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xiangjun Liu,Jingjing Ma,Shuai Zhang,Guo-Wei Guan,Qing-Yuan Yang,Junqi Wang
Harvesting solar energy to drive highly efficient photocatalytic conversion of renewable biomass to value-added chemicals and H 2, is a green and promising strategy to acquire clean H 2 with high energy density. In this study, CdS nanoparticles/Ti 3 C 2 T x nanosheets (Ti 3 C 2 T x /CdS composites) photocatalysts were prepared by a hydrothermal strategy. With an optimized Ti 3 C 2 T x loading of 0.8 wt%, the Ti 3 C 2 T x /CdS composites exhibited a significant enhancement in the photocatalytic H 2 evolution reaction with long-term stability, reaching 20,427 μmol·g −1 ·h −1 , compared to the pristine CdS (1,999 μmol·g −1 ·h −1 ). The Ti 3 C 2 T x /CdS-0.8 reflects appropriate electronic band structure and excellent conductivity, resulting in efficiently generation and migration of photoinduced electrons. In addition, the apparent quantum yield of Ti 3 C 2 T x /CdS-0.8 was 9.4% at 420 nm, higher than that of pristine CdS (1.2%). Superior results (7,164 μmol·h −1 ·g −1 ) were also achieved in the conversion of raw biomass to H 2 under natural sunlight. Achieving solar-driven H 2 production from biomass represents a significant step forward in contributing to sustainable and clean energy practices.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）