JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Fusheng Pan,He Ding,Weidong Li,Yimeng Song,Hao Yang,Hong Wu,Zhongyi Jiang,Baoyi Wang,Xingzhong Cao
Constructing facilitated transport pathways using two-dimensional (2D) nanosheets as building blocks is an emerging approach to achieving highly selective passage of small molecules with similar physical properties. Due to high chemical inertness and low structural defects, molybdenum disulfide (MoS 2 ) 2D nanosheets hold great promise in a broad range of molecular separation applications. In this study, MoS 2 nanosheets were incorporated in Pebax matrix to remove thiophene from the n-octane-thiophene mixture. The moderate binding energy of thiophene on the basal plane of MoS 2 enabled the construction of continuous facilitated transport pathways on the MoS 2 nanosheet for rapid diffusion of thiophene molecules. When the content of MoS 2 in the hybrid membrane was 4 wt%, the membrane displayed an optimum desulfurization performance with a permeation flux of 11.42 kg/ (m 2 h) (22.27% higher than that of Pebax membrane) and an enrichment factor of 9.11 (65.94% higher than that of Pebax membrane) at 60 °C with a feed solution containing 1312 ppm thiophene. This study is the first attempt of using MoS 2 nanosheets in pervaporative separations of small molecules liquid mixture, which may open a novel avenue to constructing facilitated transport pathway within membranes for efficient molecular sieving.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yang Li,Zhao Wang,Hujie Zhao,Xiaojun Huang,Mujie Yang
Formation of heterostructure and nanostructure is promising approach to improving the photocatalytic activity of TiO 2 based photocatalysts . In this work, MoS 2 @TiO 2 @poly(methyl methacrylate) (PMMA) was prepared by freeze drying of hydrothermally treated electrospun PMMA nanofibers containing titanium n-butoxide and MoS 2 nanosheets . As-prepared nanocomposite revealed a 3D nanofiber network structure with high specific surface (83.6 m 2 /g), in which MoS 2 nanosheets loaded with TiO 2 nanoparticles were distributed on the surface of PMMA fibers. MoS 2 @TiO 2 @PMMA showed better photocatalytic performance than MoS 2 @PMMA, TiO 2 @PMMA, MoS 2 @TiO 2 and MoS 2 @P25@PMMA towards the photodegradation of methyl orange (MO) under UV illumination. Typically, MoS 2 @TiO 2 @PMMA (100 mg) could degrade MO (10 mg/L, 100 mL) completely in 40 min under UV irradiation , revealing good photocatalytic activity . Moreover, the nanocomposite could be facilely recovered by filtration, and maintain almost the same photocatalytic activity after cycling tests for ten times, indicating excellent stability and recyclability. The enhanced photocatalytic performance of the nanocomposite might relate to the heterostructure between MoS 2 and TiO 2 to suppress the recombination of photo-induced charge, and the 3D hierarchical nanoweb structure to afford large specific surface area and high density of active sites.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Chaoqun Ma,Da Liu,Yanli Zhang,Jin Yong Lee,Jian Tian,Bingping Liu,Shihai Yan
Electrochemical ammonia synthesis (EAS) is considered to be an ecofriendly and sustainable method for artificial N 2 fixation. It is urgent to develop cost-effective and efficient electrocatalysts for EAS because present catalysts have low activity and poor selectivity. Herein, Fe 2 O 3 nanoparticles anchored on MoS 2 nanoflowers (Fe 2 O 3 @MoS 2 ) were developed as a highly efficient EAS electrocatalyst under ambient conditions. Electrochemical measurements indicate that Fe 2 O 3 @MoS 2 achieves a remarkable NH 3 yield of 112.15 μg h −1 mg cat −1 at − 0.6 V vs. reversible hydrogen electrode (RHE) and a high faradaic efficiency (FE) of 8.62% at − 0.4 V vs. RHE in 0.1 M Na 2 SO 4 , much better than the EAS performance of separate MoS 2 and Fe 2 O 3 . The superior electrochemical stability is confirmed by long-term (at least 24 h) continuous tests. Density functional theory (DFT) calculations show that Fe 2 O 3 @MoS 2 , compared to MoS 2 , is better able to activate inert N 2 molecules, as reflected by its greater adsorption energy (−0.32 eV vs. − 0.10 eV), greater N≡N bond distance (1.223 Å vs. 1.159 Å), lower energy barrier (0.40 eV vs. 0.78 eV), and greater charge transfer from active sites to N 2 molecules (1.16 e − vs. 0.62 e − ). Thus, this work provides new perspectives on the development of efficient EAS catalysts using MoS 2 -based materials as the substrate.
研究领域:
材料科学
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电化学
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催化剂开发
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2022
·
IF 0
Lin Lin Cai,Xiao Qing Jiang
A new composite of graphene/MoS2 is synthesized by co-exfoliation of graphite and MoS2 in isopropanol (IPA) using the organic salt potassium sodium tartrate as the assistant. The composite is characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectra. The results of TEM, XPS, and Raman spectra all illustrate that the graphene/MoS2 composite has been synthesized successfully. Furthermore, the composite is modified on glassy carbon electrode to fabricate a sensor to detect dopamine (DA). The sensor shows two linear detection ranges for DA. One is 1-45 μM and the other is 45-120 μΜ. The detection limit of the sensor (S/N=3) is 0.76 μM.
研究领域:
材料科学
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分析化学
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生物传感
✓ 已验证
DOI
Arabian Journal of Chemistry
·
2023
·
IF 6
Zuoda Liu,Yuan Gao,Lianpu Wen,Xue Wang,Jianmin Feng,Changjun Zhu,Dejun Li,Mengli Zhao
Molybdenum disulfide (MoS 2 ), as a nanozyme, can effectively kill tumor cells by catalyzing H 2 O 2 to produce extremely poisonous hydroxyl radical (*OH). In this work, spherical MoS 2 -PEG nanozymes were prepared by hydrothermal synthesis under the modification of polyethylene glycol (PEG). Firstly, XRD, XPS, SEM, TEM, and BET were used to analyze the phase, morphology, oxidation state, and distribution of each element of nanozyme. Secondly, the determination and verification of *OH as the main reactive oxygen species (ROS) in the MoS 2 -PEG nanozyme catalyzed Fenton reaction based on 3,3′,5,5′-tetramethyldiphenylamine (TMB) color reaction and electron spin resonance (ESR). Interestingly, MoS 2 -PEG nanozymes exhibited cytostatic rates of 43.9 % and 47.2 % in vitro in mouse breast cancer cell (4T1) and mouse glioma cell (GL261) tumor cell models. In mouse fibroblast (L929) models, MoS 2 -PEG nanozymes showed excellent cytocompatibility and safety. Therefore, MoS 2 -PEG nanozyme may serve as an impactful drug to inhibit cancer cell growth.
研究领域:
生物医学
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纳米医学
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癌症治疗
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zhenhao Xia,Xiaoyong Tian,Peipei Xu,Baijie Cheng,Hongyao Xu,Shanyi Guang
In this era of high drug resistance, there is an urgent need for novel antimicrobial agents and strategies to achieve smarter sterilization effects. However, developing an environmentally friendly, controllable, and self-cleaning smart antimicrobial material remains a formidable challenge. In this work, a smart antimicrobial nanoplatform composed of Cu 3 Mo 2 O 9 and MoS 2 has been successfully designed and synthesized. The computational findings reveal that, owing to the interfacial coupling between the two substances at the solid junction, this architecture can effectively absorb near-infrared light, significantly reduce migration resistance, and improve carrier separation efficiency. Empirical observations demonstrate that with a sample concentration of 100 μg/mL, under near-infrared (NIR) laser irradiation, the microenvironmental temperature proximal to the bacteria can be swiftly elevated from 28.6 °C to in excess of 50 °C within a mere 6 min. The overall photothermal conversion efficiency is 32.6 %, and it exhibits an active oxygen level nearly 5 times higher than that of Cu 3 Mo 2 O 9 . Furthermore, the permeability of the cell membrane was greatly improved with the increased temperature, which is beneficial for the generated reactive oxygen species (ROS) entering the bacterial cells. After synergistic antimicrobial treatment, the antibacterial rate against Escherichia coli can reach over 99 %. More importantly, this nano-platform features a unique ’activation’ mechanism that uses NIR as an ’activation switch’ to selectively toggle between ’passive defense,’ ’secondary sterilization,’ and ’active attack’ antibacterial modes as needed. Upon interaction with aqueous environments, its reusability and favorable biocompatibility with terrestrial and aquatic life promise to facilitate the intelligent eradication of deleterious microorganisms in aquatic systems via the diurnal cycle of sunrise and sunset. This is highly significant for the ongoing management and maintenance of public resources such as amusement parks, artificial fish ponds, and urban water features.
研究领域:
材料科学
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微生物学
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纳米医学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 3
·1-9
·
IF 5.833
Xian Zhiquan,Zhang Li,Yu Ying,Lin Bixia,Wang Yumin,Guo Manli,Cao Yujuan
A nanozyme based on CoFe 2 O 4 modified with MoS 2 was constructed for colorimetric determination of cysteine (Cys) and glutathione (GSH). Firstly, ferrite CoFe 2 O 4 is synthesized, and it is then modified by MoS 2 to form a flower-like polymer (MoS 2 @CoFe 2 O 4 ). In the presence of H 2 O 2 , a redox interaction takes place, and the resulting hydroxyl promoted a colorimetric conversion from colorless to blue in the presence of 3,3′,5,5′-tetramethylbenzidine (TMB). However, once Cys or GSH is added, they are capable to compete with the interaction of the hydroxyl with TMB, resulting in an inhibition of the colorimetric conversion. The colorimetric distinction is sensitive to the amount of target. The results obtained proved that the catalytic efficiency of MoS 2 @CoFe 2 O 4 is 4.4-fold and 1.8-fold to that of MoS 2 and CoFe 2 O 4 . Meanwhile, the K m values to TMB and H 2 O 2 are 0.067 and 0.048 mM, respectively, which are 6.5-fold and 77-fold, respectively smaller than those of natural peroxidase such as HPR. This indicates that the MoS 2 @CoFe 2 O 4 possesses a favorable interaction affinity. Additionally, the colorimetric distinction caused by the competition between TMB and cysteine or glutathione is obvious. The signal responses to cysteine and glutathione are linear in the range 0.5~15 μM and 0.5~35 μM, and the LODs are 0.10 and 0.21 μM, respectively. In practical assay of Cys in serum, the RSD of the sample tests is 4.6%, and the recoveries for the spiked assays are 95.3% and 96.0% with the RSD of 2.1% and 4.2%, respectively. Graphical abstract
研究领域:
生物化学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Meng-Qi Ma,Chao Zhang,Cheng-Ye Zhu,Sheng Huang,Jing Yang,Zhi-Kang Xu
Two-dimensional (2D) nanosheets have attracted extensive attention and have been considered as compelling nanofillers of polyamide-based nanofiltration membranes (NFMs) with thin film nanocomposite (TFN) frame. However, there still remains a big challenge, the poor compatibility between these 2D nanofillers and the polyamide matrix, significantly restricting their practical applications. Herein, we present TFN NFMs by incorporating tannic acid (TA) functionalized molybdenum disulfide (MoS 2 ) nanosheets into the polyamide skin layers via typical interfacial polymerization of piperazine (PIP) and trimesoyl chloride (TMC). TA was employed to assist the aqueous exfoliation of bulk MoS 2 into 2D nanosheets, and simultaneously served as the functional molecule to modify and stabilize the as-exfoliated MoS 2 nanosheets in aqueous solutions. Thanks to the contribution of TA, the MoS 2 nanosheets can be covalently linked into the skin layers through the reaction of TA and TMC, thus exhibiting excellent compatibility with polyamide matrix. Besides, the as-prepared TFN NFMs show promoted water permeation as high as 17.0 L/m 2 ⋅h⋅bar without compromising the salt rejection of divalent ions (98.5%). Moreover, these high-performance TFN NFMs also possess outstanding long-term stability, with great implication for the practical applications.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
Micromachines
·
2023
·Vol. 14
·期 3
·660
·
IF 3.4
Youqiang Xing,Yun Wang,Lei Liu,Ze Wu
As a major public health issue, early cancer detection is of great significance. A field-effect transistor (FET) based on an MoS2/C60composite nanolayer as the channel material enhances device performance by adding a light source, allowing the ultrasensitive detection of cancer-related miRNA. In this work, atomic layer deposition (ALD) was used to deposit MoS2layer by layer, and C60was deposited by an evaporation coater to obtain a composite nanolayer with good surface morphology as the channel material of the FET. Based on the good absorption of C60by blue-violet light, a 405 nm laser was selected to irradiate the channel material, improving the function of FET biosensors. A linear detection window from 10 pM to 1 fM with an ultralow detection limit of 5.16 aM for miRNA-155 was achieved.Keywords:ultrasensitive detection;FET;MoS2/C60composite nanolayer
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2024
·Vol. 18
·期 4
·2300346
·
IF 2.5
Dingbang Yang,Xiao Guo,Junjie Jiang,Yongsong Wang,Yuedong Wang,Jindong Bai,Haipeng Xie,Jin Li,Fangping Ouyang,Han Huang
Interfacial interactions, including interfacial charge transfer and strain, play important roles in the applications of 2D layered materials. Recently, MoO 2 have been widely used as precursors or substrates for growth of high-quality MoS 2 . Herein, photoluminescence (PL) and Raman spectroscopy are used to investigate the dependence of epitaxial monolayer MoS 2 PL properties on MoO 2 nanoflakes in different thicknesses on c-sapphire. On all MoO 2 nanoflakes, the trion exciton of MoS 2 disappears due to the interfacial charge transfer from MoS 2 to MoO 2 . The neutral exciton of MoS 2 exhibits a ≈60 meV redshift on thick MoO 2 nanoflakes compared to those either on c-sapphire or on thin MoO 2 nanoflakes, which is attributed to the relaxation of c-sapphire-induced compressive strain in MoO 2 over a critical thickness. Temperature-dependent PL measurements reveal a stronger electron–phonon interaction in MoS 2 on MoO 2 than on c-sapphire. The findings provide an easy way to tune the properties of MoS 2 via tuning the thickness of MoO 2 buffer layer on c-sapphire.
研究领域:
材料科学
·
物理化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 7
·3650-3658
·
IF 5.8
Jun Tang,Jinzhao Huang,Sixuan Zhang,Zehui Liu,Jing Xiao
Although molybdenum disulfide (MoS2) has garnered significant interest as a potential catalyst for the oxygen evolution reaction (OER), its poor intrinsic activity and few marginal active spots restrict its electrocatalytic activity. Herein, we successfully constructed a catalyst via a simple hydrothermal method by forming a heterostructure of MoS2 with Cr-doped nickel–iron hydroxide (NiFe LDH) to synthesize a MoS2/NiFeCr LDH catalyst to significantly improve the OER catalytic performance. MoS2 plays a crucial function as an electron transport channel in the MoS2/NiFeCr LDH heterostructure, which increases the electron transport rate. Furthermore, a larger active surface area for NiFeCr LDH is provided by the ultrathin layered structure of MoS2, increasing the number of active sites and encouraging the OER. On the other hand, the introduction of Cr element increased the density of the catalytic center and provided additional Cr-OH active sites, which accelerated the oxygen decomposition reaction. These two factors act synergistically to improve the intrinsic structure of MoS2, increase the number of reactive sites, and dramatically enhance the OER catalytic performance. Excellent OER activity is demonstrated by the MoS2/NiFeCr LDH catalyst, which only needs an overpotential of 224 mV to obtain a current density of 10 mA cm−2 and a Tafel slope of 61 mV dec−1. The catalyst also demonstrated outstanding stability, with its activity practically holding steady after 48 h of testing. This work offers novel ideas for enhancing and designing MoS2-based OER catalysts, and it provides a crucial reference for research in the field of clean energy.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Xiaodong Wang,Yongxun Dai,Chen Tian,Huize Zhang,Xiwen Li,Wenlong Liu,Weibing Li,Shaoping Kuang,Hongtao Tong
Photocatalysts can be effectively recovered and reused by compounding with magnetic nanostructures. How to further improve the photocatalytic performance of magnetic heterojunction photocatalysts remains a great challenge. In this work, g-C 3 N 4 /ZnFe 2 O 4 (CN/ZFO) magnetic heterojunction photocatalyst was first prepared and then modified with ultrathin MoS 2 (CN/ZFO/MoS 2 ) by simple ball-milling method. Then the photocatalytic removal of Cr(Ⅵ) performance of the prepared series photocatalysts was evaluated in detail. The optimum CN/ZFO/MoS 2 can achieve 99.3% Cr(Ⅵ) removal under 200-min simulated sunlight illumination, which is much higher than CN/ZFO (54.0%). The enhanced photocatalytic performance benefits from the modification of MoS 2 , which improves the light absorption performance, facilitates the transfer of photogenerated carriers , increases the concentration of photogenerated carriers and promotes the effective separation of photogenerated carriers. This work provides a theoretical basis for further preparation of magnetic recyclable photocatalysts with high photocatalytic performance.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）