ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
·
2021
·Vol. 46
·期 7
·6753-6763
·
IF 2.334
Li Yinta,Tang Chunyan,Yang Lang,Sun Yongjun,Ju Wenming
Layered MoS 2 nanosheets have been widely investigated for wastewater treatment or polymer flame retardant alone, while few reports concern about their integrated utilization within the two fields. Herein, the authors creatively explored the multiple roles of MoS 2 nanosheets for simultaneous water treatment and polymers flame retardant. MoS 2 nanosheets were firstly employed as adsorbents for heavy metals removal and organics elimination in wastewater. The adsorption capacities of MoS 2 for methylene blue (MB) and methyl orange (MO), Co 2+ , Ni 2+ , were found 181.8, 102.1, 61.7 and 51.8 mg/g, separately, due to the chemical and electrostatic interactions. Then the MoS 2 nanosheets after water treatment (MoS 2 −x) were blended into polystyrene (PS) to study their flame-retardant properties and integrated utilization explorations. Results based on thermal stability, smoke suppression and heat resistance revealed that MoS 2 −x/PS composites displayed slower heat release rate (HRR), smaller smoke production rate (SPR) and lower CO production rate (COP) but higher T −10% than that of pristine PS, demonstrating the excellent flame-retardant efficiency of MoS 2 −x. Mechanisms for the great promotion in flame-retardant properties were found mainly resulted from nano-barrier and block wall effect of MoS 2 −x. Meanwhile, the rapid formation of char residue during the combustion also contributed to the improvement. Investigations in the present work implied the MoS 2 nanosheets could not only remove heavy metals and organics, but also can simultaneously delay the polymer combustion, demonstrating the excellent integrated and multiple roles of MoS 2 nanosheets in water remediation and polymer flame retardant.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 11
·1865
·
IF 5.719
Weiwei Zhang,Zhao Kuang,Ping Song,Wanzhen Li,Lin Gui,Chuchu Tang,Yugui Tao,Fei Ge,Longbao Zhu
Photothermal therapy has been widely used in the treatment of bacterial infections. However, the short photothermal effective radius of conventional nano-photothermal agents makes it difficult to achieve effective photothermal antibacterial activity. Therefore, improving composite targeting can significantly inhibit bacterial growth. We inhibited the growth ofStaphylococcus aureus(S. aureus) by using an extremely low concentration of vancomycin (Van) and applied photothermal therapy with molybdenum disulfide (MoS2). This simple method used chitosan (CS) to synthesize fluorescein 5(6)-isothiocyanate (FITC)-labeled and Van-loaded MoS2-nanosheet hydrogels (MoS2-Van-FITC@CS). After modifying the surface, an extremely low concentration of Van could inhibit bacterial growth by trapping bacteria synergistically with the photothermal effects of MoS2, while FITC labeled bacteria and chitosan hydrogels promoted wound healing. The results showed that MoS2-Van-FITC@CS nanosheets had a thickness of approximately 30 nm, indicating the successful synthesis of the nanosheets. The vitro antibacterial results showed that MoS2-Van-FITC with near-infrared irradiation significantly inhibitedS. aureusgrowth, reaching an inhibition rate of 94.5% at nanoparticle concentrations of up to 100 µg/mL. Furthermore, MoS2-Van-FITC@CS could exert a healing effect on wounds in mice. Our results demonstrate that MoS2-Van-FITC@CS is biocompatible and can be used as a wound-healing agent.Keywords:MoS2nanosheet;antibacterial activity;photothermal therapy;wound-healing
研究领域:
材料科学
·
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2020
·Vol. 13
·期 1
·191
·
IF 3.057
Ya’e Qi,Ling Zhang,Yongxia Wang
Ionic liquid (IL) combined with 2D materials has evoked considerable attention in the field of lubrication applications because of their speical structure and outstanding lubrication properties. However, the ambiguous effect of the 2D materials on the friction and anti-wear properties of the IL needs futher study. Here, we have obtained two families of IL composite films with additives of MoS2and graphene via a combined process of spin-coated and curing, and the distinction of the effects of two additives on the tribological performance of the IL films was studied. The friction tests showed that the friction coefficient and anti-wear life of the IL films were greatly enhanced after the addition of MoS2or graphene, which could be attributed to the improved load-carrying capacity and the second lubrication phase. Under a low addition content, graphene had more advantages to reduce the friction of the films, and MoS2was more beneficial to the tribological properties with the additional content increased. The films with low friction and good anti-wear properties may be valuable for the rational design of lubrication films for the practical engineering applications.Keywords:ionic liquid film;MoS2nanosheet;graphene;friction;anti-wear
研究领域:
材料科学
·
润滑工程
✓ 已验证
DOI
PubMed
高影响因子
Alexandria Engineering Journal
·
2024
·
IF 6.2
Zhenjun Wang,Zongtao Xie,Chuanxin Liu,Xiaojun Zhang
The active ingredient in traditional Chinese medicine, silybin (SBN), is known to inhibit the proliferation of cancer cells and synergistically enhance the anticancer effects of the chemotherapy drug doxorubicin (DOX). However, the combination of SBN and DOX faces challenges such as a lack of targeting, short half-lives, different administration routes, and pharmacokinetic processes, which prevent the drug combination from effectively targeting tumors and diminish their synergistic potential, thereby limiting their in vivo antitumor effects. In response, this study proposes the development of a novel nanocarrier system based on molybdenum disulfide (MoS₂) modified with polyethylene glycol (PEG) and sialic acid (SA) to co-deliver SBN and DOX. This system is designed to trigger the release of the drugs in response to dual stimuli of pH and near-infrared light, increasing the intracellular concentration of the drugs and enhancing their synergistic interaction. The MoS₂-LPN-SBN/DOX nanosystem circulates within the body and specifically accumulates at tumor sites due to the enhanced permeability and retention (EPR) effect and SA-mediated active targeting. Upon exposure to near-infrared light, the system provides combined chemo- and photothermal therapy, leading to significant tumor suppression. This research offers a new approach and strategy for the clinical treatment of lung cancer, suggesting a promising pathway for enhancing the efficacy of traditional therapies.
研究领域:
肿瘤学
·
药剂学
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 11
·7008-7021
·
IF 4.22
Xu Linan,Zhang Yihe,Feng Lili,Li Xin,An Qi
Transitional metal sulfide ultrathin structures present various advantageous functional properties and hold great promise in energy conversion reactions, but their facile and large-scale preparation are still challenging. Herein, a facile strategy is developed for the preparation of ultrathin MoS 2 nanosheets via an organic matrix-facilitated deposition followed by ultrasonic exfoliation strategy. MoS 2 nanosheets with lateral dimensions around 100 nm and thickness around 10–20 nm are facilely obtained. They present the typical multiple absorbance indicating the unique band structure characteristics of MoS 2 2D nanosheets. Furthermore, the electronic structures of the ultrathin MoS 2 nanosheets can be tuned via controlling their immediate environment in assemblies. In the layer-by-layer interfacial assemblies of (PEDOT:PSS/MoS 2 )n multilayers, the catalytic efficiency of MoS 2 nanosheets is enhanced by a charge transfer process as corroborated by DFT simulation. The catalytic capabilities of the assemblies are optimized by the well-controlled layer-by-layer process and present effective and stable electrochemical HER properties. We expect that this fabrication strategy of 2D MoS 2 nanosheets promote the research of functional materials based on MoS 2 nanosheets and can be extended to the preparation of other nanosheet materials.
研究领域:
材料科学
·
能源转换
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Shishi Yang,Kaisong Zhang
Two-dimensional (2D) molybdenum disulfide (MoS 2 ) nanosheets materials with excellent properties provide a new possibility and approach for designing nanofiltration (NF) membranes with overcoming the “trade-off” phenomenon of permselectivity. Few-layers of 2D MoS 2 were synthesized by a facile solvent-assisted ultrasonic exfoliation method. A novel nanocomposite NF membrane was fabricated through interfacial polymerization by addition of the as-prepared MoS 2 nanosheets into the organic phase at different concentrations. The characterization of field-emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) confirmed that MoS 2 nanosheets were successfully embedded in the membranes. As a result, the hydrophilicity, electronegativity and cross-linking degree of the membranes were significantly enhanced. The membrane achieved its best performance at a MoS 2 concentration of 0.010 wt/v% with about 2.3 times increment in water permeability without sacrificing salt rejection compared to the control membrane. Moreover, the modified membrane exhibited higher stability over a long-term test. This provides new thinking and guidance for the industrial preparation of NF with excellent separation performance.
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
Inorganic Chemistry Frontiers
·
2017
·Vol. 4
·期 4
·683-691
·
IF 4.036
Xiongwei Wang,Ludan Zhang,Peiyi Wu
In this work, a novel nanocomposite with few-layered ultrasmall MoS2 nanosheets uniformly anchored on a three-dimensional (3D) flower-like carbon (FC) was designed and prepared, where zinc oxide was used as a sacrificial template to prepare a biomass-based FC skeleton by a hydrothermal method and subsequent high-temperature carbonization. When evaluated as an anode material for lithium ion batteries (LIBs), the three-dimensional FC matrix can not only improve the electronic conductivity of the hybrid, but also enable fast electrolyte diffusion to MoS2. The FC–MoS2 hybrid exhibits a high second reversible capacity of 1033 mA h g−1 at 0.2 A g−1, excellent cycling stability with negligible capacity loss after 200 cycles at 1.6 A g−1, and good rate performance. Additionally, the hybrid also shows enhanced electrocatalytic performance for hydrogen evolution. We believe that our method may provide a cost-effective and eco-friendly route to prepare 3D biomass-based composites for energy generation or storage.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Duqiang Xin,Shaodan He,Xiaona Han,Xudong Zhang,Zhaofang Cheng,Minggang Xia
The widespread use of wearable devices has triggered a huge demand for flexible power source. Flexible lithium-ion batteries (LIBs) are widely regarded as an ideal power source for wearable devices because of their high energy density and long cycle life, but their application is limited by traditional rigid electrodes. A promising strategy is to prepare flexible electrodes by synthesising active materials with high capacity on flexible carbon substrates. In this study, Co-doped 1T‐MoS 2 nanosheets were successfully anchored on a pretreatment carbon cloth (CC) by using a facile one-step solvothermal method, which is denoted as Co-MoS 2 /CC. Benefiting from the high conductivity and large layer spacing of the metallic 1T‐MoS 2 , self-supporting CC framework, doping of cobalt and their synergistic effect, when used as a self-supporting anode for LIBs, Co-MoS 2 /CC delivers a high reversible capacity of 1392 mAh g −1 at 0.1 A g −1 and retains 611 mAh g −1 at 2 A g −1 over 300 cycles. Furthermore, it delivers a remarkable rate performance of 230 mAh g −1 at 10 A g −1 . The facile and scalable synthesis method can also be applied to other similar flexible free-standing electrodes for the application of electrochemical energy storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Wan-Long Li,Wan-Ting Lin,Cheng-Ye Zhu,Ping Fu,Di Zhou,Xiao-Jun Huang,Zhi-Kang Xu,Ling-Shu Wan
High-performance polyamide thin film composite (TFC) nanofiltration membranes have received great attention in recent years. Herein, we report the preparation of TFC nanofiltration membranes by interfacial polymerization using MoS 2 nanosheets as the nanomaterial interlayer. The aqueous monomer and MoS 2 nanosheets are distributed on the surface of microporous membrane substrates by a one-step method. The MoS 2 interlayer improves the uniformity and smoothness of the microporous substrates, helping to form polyamide nanofilms at ultralow monomer concentration. Moreover, the hydrophilic and negatively-charged MoS 2 nanosheets enhance the water permeability and negative charges of the nanofiltration membranes. The composite membranes show both high water permeance of 33.5 L m −2 h −1 bar −1 and Na 2 SO 4 rejection of 97.5%, as well as significantly improved mono-/divalent anions selectivity and antifouling property. It is proved that the interfacial polymerization strategy assisted by the MoS 2 interlayer is effective for preparing high-performance nanofiltration membranes.
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
DESALINATION
·
2023
·
IF 9.9
Jinsong He,Tingyan Deng,Linzhi He,Xiaochan An,K.G. Nadeeshani Nanayakkara,Fei Shen,Yanzong Zhang,Jianmei Zou,Li Zhao
From the view of sustainable development, the loose nanofiltration (LNF) membrane with high permeability and excellent separation of dye/salt mixture becomes more attractive for dye-containing wastewater. However, the previous LNF membranes inevitably suffered from the permeability-selectivity trade-off due to the inherent nature of polymer-based selective layer. This study reported a tannic acid (TA)-MoS 2 nanosheets (NSs) interlayered nanocomposite polyester (PE) LNF membrane (iLNF-3) that exhibited a remarkably enhanced water permeance of 55.8 LMH·bar −1 compared to the control LNF membrane of 27.3 LMH·bar −1 , and a higher separation selectivity of dye/salt (rejection rate: 99.6 % for congo red, 98.0 % for methyl blue, 5.6 % for Na 2 SO 4 , respectively). Furthermore, the iLNF-3 showed high ionic interference resistance, long-term stability, and superior antifouling performance. The enhanced permeance and dye/salt separation were mainly attributed to the introduction of a high-permeability TA-MoS 2 NSs interlayer . In particular, the permeability was improved due to the “gutter” effect and nanochannels and the formed thinner PE selective layer caused by TA-MoS 2 NSs interlayer. Notably, the selectivity was enhanced owing to the looser porous structure of PE layer resulting from the slow diffusion rate of aqueous monomer . This study can provide a foundational framework for the development of iLNF membranes for treating dye containing wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2020
·Vol. 8
·期 5
·504
·
IF 2.753
Siyi Huang,Ziyun You,Yanting Jiang,Fuxiang Zhang,Kaiyang Liu,Yifan Liu,Xiaochen Chen,Yuancai Lv
Owing to their peculiar structural characteristics and potential applications in various fields, the ultrathin MoS2nanosheets, a typical two-dimensional material, have attracted numerous attentions. In this paper, a hybrid strategy with combination of quenching process and liquid-based exfoliation was employed to fabricate the ultrathin MoS2nanosheets (MoS2NS). The obtained MoS2NS still maintained hexagonal phase (2H-MoS2) and exhibited evident thin layer-structure (1–2 layers) with inconspicuous wrinkle. Besides, the MoS2NS dispersion showed excellent stability (over 60 days) and high concentration (0.65 ± 0.04 mg mL−1). The MoS2NS dispersion also displayed evident optical properties, with two characteristic peaks at 615 and 670 nm, and could be quantitatively analyzed with the absorbance at 615 nm in the range of 0.01–0.5 mg mL−1. The adsorption experiments showed that the as-prepared MoS2NS also exhibited remarkable adsorption performance on the dyes (344.8 and 123.5 mg g−1ofqmfor methylene blue and methyl orange, respectively) and heavy metals (185.2, 169.5, and 70.4 mg g−1ofqmfor Cd2+, Cu2+, and Ag+). During the adsorption, the main adsorption mechanisms involved the synergism of physical hole-filling effects and electrostatic interactions. This work provided an effective way for the large-scale fabrication of the two-dimensional nanosheets of transition metal dichalcogenides (TMDs) by liquid exfoliation.Keywords:transition metal dichalcogenides;liquid exfoliation;adsorption;quenching
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
BIOMACROMOLECULES
·
2020
·
IF 6.092
Huan Chen,Xueqian Li,Wenchao Yu,Jinyu Wang,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
High-performance dielectric nanomaterials have received increasing attention due to their important applications in the field of energy storage. Among various dielectric materials, polymer nanocomposite is one of the most promising candidates. However, the problems of environmental pollution caused by polymer-based dielectric materials have been extensively studied in recent years, which need to be solved urgently, leading to the search for new biodegradable dielectric materials. Herein, we report composite materials based on biodegradable and renewable chitin and molybdenum disulfide (MoS2) nanosheets for the first time. The MoS2 nanosheets were first fabricated by glycerol/urea system and then KOH/urea aqueous solution was used to directly dissolve chitin at low temperature together with the dispersion of the MoS2 nanosheets in a simple green process. The two-dimensional MoS2 nanosheets possess high polarization strength, and a large specific surface area can enhance the interfacial polarization with chitin; meanwhile, it can serve as a charge breakdown barrier to hinder the propagation of electrical tree branches. The results also show that the dielectric constant and breakdown strength of the chitin/MoS2 nanocomposites were increased, while the dielectric loss remained low. When the MoS2 content was 5 wt %, the charge and discharge efficiencies of the composite film were more than 80%, and the breakdown strength also reached 350 MV m–1, thus resulting in a high discharge energy density of 4.91 J cm–3, which was more than twice of the neat chitin (2.17 J cm–3). Furthermore, the nanocomposite films exhibited good thermal stability. Therefore, these chitin-based nanocomposite films are promising as high-performance biomass-based dielectric capacitors.
研究领域:
材料科学
·
能源存储
·
生物降解材料
✓ 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）