DESALINATION
·
2023
·
IF 9.9
Jiawei Fu,Hang Xu,Tao Lin,Ao Wang,Anqi Wang,Chen Yao,Weihang Chen,Mingmei Ding,Chunxia Geng,Li Gao
Thin-film composite (TFC) nanofiltration (NF) membrane having excellent permeability and desired rejection is needed for water reuse and desalination . However, it remains a tremendous challenge to boost permeability while sustaining the rejection of the membrane. Herein, a novel TFC NF membrane possessing a thin and crumpled polyamide (PA) selective layer was fabricated using heterostructural MXene-TiO 2 as interlayer through a conventional interfacial polymerization (IP) reaction. The heterostructural MXene-TiO 2 was obtained by the in situ MXene oxidation with peroxymonosulfate (PMS), which effectively regulated the nanostructure of the interlayer and avoided the over-stacking of the nanosheets , promoting the rapid transport of water molecules. Moreover, the large specific area and numerous edges of MXene-TiO 2 boosted the adsorption and release of amine monomers on the substrates, facilitating the crumpled structure formation. In this way, the obtained membrane with 30.25 nm in thickness achieved a 98.29 % rejection for MgSO 4 and an enhanced water permeance of 11.10 L m −2 h −1 bar −1 , about 2.5 times that of TFC 0 NF membrane. Our work presents a novel approach of feasibility to engineer a TFC NF membrane with outstanding performance for water treatment .
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高影响因子
Acta Biomaterialia
·
2023
·
IF 9.7
Tao Liao,Zhongyin Chen,Ying Kuang,Zhe Ren,Wenqian Yu,Wen Rao,Linwei Li,Yun Liu,Ziqiang Xu,Bingbing Jiang,Cao Li
As a controllable, simple method with few side effects, near-infrared (NIR) light-based photothermal therapy (PTT) has been proven an effective cancer therapeutic approach. However, PTT-induced inflammation is a potential negative factor. And the overexpressed heat shock proteins (HSPs) by cancer cells can protect them from hyperthermia during PTT. In this work, small-size Ti 3 C 2 T x MXene nanosheets with high photothermal conversion efficiency in the region of NIR, high cargo loading capability and good free radical scavenging capability were chosen for cancer PTT and anti-inflammation. And (-)-epigallocatechin gallate (EGCG) was applied to form EGCG/Fe metal-polyphenol nanodots on the nanosheets. EGCG being released in acid cancer cells could reduce the expression of HSPs and could be used for anti-inflammation. As a result, the complex nanosheets named MXene@EGCG could achieve enhanced cancer PTT and be anti-inflammatory. Both in vitro and in vivo studies proved the good photothermal ability of MXene@EGCG and demonstrated that it could inhibit the expression of HSPs in tumor cells and relieve PTT-induced inflammation. Therefore, the nanosheets show good results in tumor ablation with a low level of inflammation, which provides another possibility for cancer therapy. Statement of significance Photothermal therapy (PTT)-induced inflammation plays an essential role in some important stages of tumor development and is unfavorable for cancer treatment. And hyperthermia leads to the overexpression of heat shock proteins (HSPs) in cancer cells, which limits the therapeutic effect of PTT. Therefore, we coated small-size Ti 3 C 2 T x MXene nanosheets with (-)-epigallocatechin gallate (EGCG)/Fe metal-polyphenol nanodots and named them as MXene@EGCG. This system shows a good photothermal conversion efficiency at 808 nm. And it can release EGCG in cancer cells to inhibit the expression of HSPs, thus achieving an enhanced cancer PTT. Both MXene and EGCG can also diminish the PTT-trigged inflammation. Both in vitro and in vivo studies prove the good anti-cancer PTT effect and anti-inflammation capability of MXene@EGCG.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 8
·2335-2344
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IF 4
Jie Jin,Shanshan Wu,Jing Wang,Yunqi Xu,Shouhu Xuan,Qunling Fang
In this work, a MXene@AgPd/polydopamine (PDA) nanosheet with excellent photothermal conversion efficiency was successfully synthesized by a simple redox-oxidative polymerization method. Interestingly, AgPd bimetallic nanocrystals sandwiched between a MXene nanosheet and PDA layer have cage-like nanostructure, which is favorable for high catalytic efficiency and antibacterial performance. Importantly, the MXene@AgPd/PDA nanosheet exhibits good catalytic activity for the reduction of 4-nitrophenol (1.2 min−1 mg−1) and the catalytic dynamics can be improved by about 1.2 times under NIR (near-infrared light, 808 nm, and 2.5 W cm−2) irradiation. As the PDA shell is well protected, the MXene@AgPd/PDA nanosheet retained more than 90% catalytic activity after 6 cycles. In addition, due to the presence of the Ag component, the MXene@AgPd/PDA nanosheet exhibited good antibacterial activity against both Gram-negative (E. coli) and Gram-positive (S. aureus) bacteria. Under near-infrared light irradiation, its antibacterial activity was further enhanced due to the NIR photothermal effect.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Yijun Fu,Chaowei Li,Yue Cheng,Yaling He,Wei Zhang,Qufu Wei,Dawei Li
Biomass aerogel materials are increasingly attracting researchers’ attention because of good biocompatibility of biomass materials and multiple functional features of aerogel materials. Herein, novel biomass aerogel composite was fabricated by doping hydroxylated barium titanate (BT-OH) nanoparticles and MXene in chitosan/bacterial cellulose (CB) aerogel by simple methods containing chemical modification, physical mixture and lyophilization. The novel aerogel composite named CB/BT-OH/MXene showed favorable piezoelectric properties and excellent photothermal antibacterial properties. The aerogel composite-based piezoelectric sensor displayed short response time (0.4 s), high response sensitivity (800 mV/N), and long cycle stability (over 1000 cycles), which could monitor various body movements, including fingers bending, speaking, wrist bending, elbow bending, smiling, and walking. Moreover, the aerogel composite possessed satisfactory photothermal conversion ability, which could reach 55 ℃ by 10 s of near-infrared irradiation (808 nm, 0.2 W/cm 2 ), successfully achieving complete sterilization effect towards S. aureus and E. coli . The novel biomass aerogel composite may find its potential applications in wearable or implantable self-powered sensors with satisfactory antibacterial performance.
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高影响因子
COMPOSITES COMMUNICATIONS
·
2023
·
IF 8
Wenting Tao,Meng Ma,Xianjun Liao,Wenqin Shao,Si Chen,Yanqin Shi,Huiwen He,Xu Wang
Conductive polymer composites (CPCs) have always attracted great attention in the development of electromagnetic shielding materials. However, how to solve the conflict between high electromagnetic (EM) waves reflection and high electromagnetic interference (EMI) shielding performance brought by conductive fillers is becoming an urgent problem. In this study, a homogeneous composite film with porous structure was constructed by vacuum filtration using cellulose nanofibers (CNF), MXene , and mesoporous carbon hollow spheres (MCHS). Benefiting from the porous structure, the impedance match between the composite film and the air was improved, thereby reducing the reflection of electromagnetic waves. In addition, the hollow porous structure of MCHS was beneficial to the multiple reflections and interfacial losses of EM waves in its pores and between the interfaces of MXene and MCHS, thereby further reducing the EM waves reflection. The obtained CNF/MXene/MCHS composite film with 10 wt% MCHS exhibits electromagnetic interference shielding effectiveness (EMI SE) of 24.6 dB, the reflection value (R) become 0.72, and the reflection effectiveness drops to 5.5 dB, which greatly improved the absorption of electromagnetic waves while meeting the commercial application standards. Hence, the preparation strategy of this work provides a concise, efficient, and controllable method for the subsequent development of low-reflection porous structured composite films.
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ACS Applied Nano Materials
·
2023
·
IF 5.9
Xinfang Zhang,Changqing Yin,Shupei Liu,Dalong Cong,Zhongsheng Li,Jiao Wang,Tao Sun,Xiaoying Liu,Zhenyu Liang,Shuai Jiang,Jinjin Li,Shuang Yi,Yuxin Zhang,Jinsong Rao
Two-dimensional (2D) nanomaterials have proven that potential applications in protecting metals from corrosion and wear. However, it remains a challenge in easy agglomeration and complex functionalization of 2D nanosheets in nanocomposite coatings. Herein, Co-doped MgAl-V2O74– layered double hydroxide (LDH) with transition metal carbide (Mo2CTx) nanosheet composites (CV-LDH-MXene) was synthesized by using a doping-electrostatic synergistic assembly strategy. After layer-by-layer assembly, nanosheet composite coatings had thicknesses of −6.9 μm. The corrosion results show that the incorporation of the CV-LDH-MXene nanocomposite coating can increase impedance at 10–2 Hz by 1 order of magnitude compared to pure LDH coating and decrease the corrosion current density by ∼30-fold. Furthermore, the friction results claimed that the CV-LDH-MXene nanosheet composites could make the coefficient of friction maintain at 0.09 after the running-in period, which displayed excellent relatively stable and anti-wear properties. These phenomena confirmed that there existed a synergistic effect of V2O74– intercalation and layer-assembled Mo2CTx MXene, which achieved stable anti-corrosion and wear characteristics. This investigation proved a substantial significance for the creation of LDH and MXene nanosheets and a giant step forward in the application of anti-corrosion and anti-wear. In particular, we promote the application of nautical instruments, underwater weapons, and seawater batteries in the shipbuilding industry and marine engineering.
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CHEMOSPHERE
·
2023
·
IF 8.8
Hao Cheng,Liwen Zhang,Jun Feng,Tingfan Tang,Danfeng Qin
A novel, sensitive Ti 3 C 2 MXene/Co 3 O 4 /carbon nanofibers (Ti 3 C 2 MXene/Co 3 O 4 /CNFs) composite was synthesized via a HF exfoliating Ti 3 AlC 2 strategy, followed by doping Co 3 O 4 and Ti 3 C 2 MXene into the CNFs via a combination electrospinning and thermal annealing process. Ti 3 C 2 MXene/Co 3 O 4 /CNFs composite exhibits higher catalytic effect, conductivity, chemical stability, and electrochemical performance than Co 3 O 4 and Ti 3 C 2 MXene in electrochemical impedance, differential pulse stripping voltammetry, chronocoulometry, and cyclic voltammetry tests. This Ti 3 C 2 MXene/Co 3 O 4 /CNFs hybrid modified electrode provides fast analysis of 4-aminophenol (4-AP) with ultrahigh sensitivity, enhanced reproducibility and strong anti-interference capability. Furthermore, the level of 4-AP was quantified by this electrode with a wide linear range from 0.5 to 150 μM (R 2 > 0.99) and a low detection limit about 0.018 μM was achieved. Finally, the fabricated electrode was used for fast and sensitive analysis of 4-AP spiked in tap water and blood serum samples. This work presents the new Ti 3 C 2 MXene/Co 3 O 4 /CNFs electrode provides a platform for 4-AP monitoring and has the advantages of high selectivity , accuracy, simplicity, and rapid analysis.
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高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 16
·3981-3992
·
IF 5.6
Yuanhong Li,Songping Mo,Junhao Chen,Bo Xiao,Lisi Jia,Ying Chen
The utilization of sugar alcohols as phase change materials (PCMs) in medium-temperature solar thermal applications has significant potential, yet their utilization is limited by their low thermal conductivity and potential leakage during the phase change process. In order to achieve greater thermal conductivity and higher photothermal conversion efficiencies, this study proposes the incorporation of MXenes within inositol nanocapsules. The structures and thermal properties of the resulting nanocapsules were methodically examined through Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible (UV-vis) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC) and the Brunauer–Emmett–Teller (BET) method. The thermal conductivity of the nanocapsule suspension was measured using a hot disk thermal constant analyzer. Furthermore, the temperature variations of the nanocapsule suspension, subjected to simulated solar irradiation, were measured and the photothermal conversion efficiencies were calculated. The findings of the study reveal that MXene doping had negligible impact on the latent heat of the nanocapsules. However, it was found that the thermal conductivity of the nanocapsule suspension was enhanced by 76.0% in comparison to that of the inositol suspension that contained an equivalent mass fraction of 2.0%. Moreover, the photothermal conversion efficiency of the nanocapsule suspension exhibited a 67.3% increase relative to that of the inositol suspension. These results indicate that the MXene-doped sugar alcohol nanocapsules demonstrate promising potential for enhancing the efficacy of solar thermal utilization.
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Engineering
·
2023
·
IF 12.8
Jianzhong Ma,Li Ma,Lei Zhang,Wenbo Zhang,Qianqian Fan,Buxing Han
This study presents a solvent-free, facile synthesis of a bio-based green antibacterial agent and aromatic monomer methacrylated vanillin (MV) using vanillin. The resulting MV not only imparted antibacterial properties to coatings layered on leather, but could also be employed as a green alternative to petroleum-based carcinogen styrene (St). Herein, MV was copolymerized with butyl acrylate (BA) to obtain waterborne bio-based P(MV–BA) miniemulsion via miniemulsion polymerization. Subsequently, MXene nanosheets with excellent photothermal conversion performance and antibacterial properties, were introduced into the P(MV–BA) miniemulsion by ultrasonic dispersion. During the gradual solidification of P(MV–BA)/MXene nanocomposite miniemulsion on the leather surface, MXene gradually migrated to the surface of leather coatings due to the cavitation effect of ultrasonication and amphiphilicity of MXene, which prompted its full exposure to light and bacteria, exerting the maximum photothermal conversion efficiency and significant antibacterial efficacy. In particular, when the dosage of MXene nanosheets was 1.4 wt%, the surface temperature of P(MV–BA)/MXene nanocomposite miniemulsion-coated leather (PML) increased by about 15 °C in an outdoor environment during winter, and the antibacterial rate against Escherichia coli and Staphylococcus aureus was nearly 100% under the simulated sunlight treatment for 30 min. Moreover, the introduction of MXene nanosheets increased the air permeability, water vapor permeability, and thermal stability of these coatings. This study provides a new insight into the preparation of novel, green, and waterborne bio-based nanocomposite coatings for leather, with desired warmth retention and antibacterial properties. It can not only realize zero-carbon heating based on sunlight in winter, reducing the use of fossil fuels and greenhouse gas emissions, but also improve ability to fight off invasion by harmful bacteria, viruses, and other microorganisms.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhenyuan Xu,Dongzhi Zhang,Zheng Li,Chen Du,Yan Yang,Bao Zhang,Wenhao Zhao
Flexible wearable sensors to monitor human movement and for electronic skins must exhibit high sensitivity, a wide detection range, and waterproof characteristics. This work reports a flexible, highly sensitive, and waterproof sponge pressure sensor (SMCM). The sensor is made by assembling SiO2 (S), MXene (M), and NH2-CNTs (C) on the backbone of melamine sponge (M). The SMCM sensor exhibits excellent sensitivity (10.8 kPa–1), an ultra-short response/recovery time (40 ms/60 ms), a wide detection range (30 kPa), and an extremely low detection limit (4.6 Pa). Benefiting from layer-by-layer self-assembly, the sensor still exhibits excellent stability after 5000 cycles. In addition, the SMCM sensor also has excellent waterproof performance (a water contact angle of 142°), enabling it to operate unaffectedly under wet conditions. The SMCM sensor can accurately detect small body movements such as pulse and swallowing while also accurately detecting finger and elbow movements. In addition, the sensor can be designed as an array to construct an electronic skin for detecting the magnitude and distribution of external pressure. This work holds great application potential in next-generation electronic skin, fitness detection, and flexible pressure sensors.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Jianfang Li,Zhenxing Yang,Chaofeng Wang,Shuilin Wu,Yufeng Zheng,Zhenduo Cui,Hui Jiang,Zhaoyang Li,Shengli Zhu,Liheng Feng,Xiangmei Liu
Photocatalytic materials are one of the most promising alternatives of antibiotics for wound disinfection, and the bacteria-killing efficacy is restrained by photocatalytic performance. Herein, Ti 3 C 2 MXene-anchored 2D metal-organic frame (MOF) nanosheets were constructed to enhance the photocatalytic performance through interface engineering strategy by in-situ growth of 2D MOF on Ti 3 C 2 nanosheets. On the one hand, the close contact between them decreased the bandgap of 2D MOF, improving the yield of photogenerated electrons. On the other hand, it not only provided a rapid electron transfer channel across the interface but also induced the formation of Schottky junction at the interface. Consequently, the separation efficiency of photo-generated electron-hole pairs was significantly enhanced by rapid transfer and inhibition of electron backflow. Thus, under 660 nm plus 808 nm light, MOF/Ti 3 C 2 killed 99.73 ± 0.12% of Staphylococcus aureus . This work will provide insights for designing photo-responsive materials through in-situ interfacial engineering strategies.
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 32
·10973-10984
·
IF 6.4
Ming Du,Shilei Ji,Canhui Qian,Lutao Li,Wei Chen,Huajie Huang,Jianping Yang,Jian Zhang,Xinbao Zhu,Xing’ao Li
The accessibility of photogenerated charge transfer channels and the activity of catalytic reaction sites are critical for efficient hydrogen evolution reaction (HER). Herein, a 3D porous N-doped Ti3C2Tx MXene matrix confining Cd0.5Zn0.5S nanoparticles (N-TCT@CZS) was fabricated via electrostatic absorption, thermal nitridation, and in situ growth processes, forming a stable heterojunction with excellent photocatalytic HER activity. Comprehensive experimental and theoretical analyses indicated that N dopants could induce more unsaturated structures and increase the abundance of active sites, while the 3D N-TCT MXene matrix with a stable scaffold configuration and interconnected porous channels could promote charge transfer kinetics, which synergistically realizes electronic structure modulation and spatial configuration design of photocatalysts. Besides, the Cd–N bonds between the N-TCT MXene and CZS enhance the interfacial interaction and expedite the directional interfacial charge transfer, thus substantially boosting photocatalytic hydrogen evolution. Consequently, the optimal N-TCT@CZS-3 nanohybrid photocatalyst possesses a superior photocatalytic HER rate of 10.90 mmol g−1 h−1, which is 4.8 times higher than that of the pristine CZS nanoparticles. This work proposes an applicable avenue for designing and fabricating novel functional 3D MXene-supported semiconductor materials for solar energy conversion.
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