POLYMER COMPOSITES
·
2024
·
IF 4.8
Chunying Min,Hang Yu,Zhaolong Sun,Hongyu Liang
Three-dimensional graphene architecture (3DGA) as reinforcement with successive reinforcement effect has attracted intense attention in the field of polymer composites, while 3DGA also faces the disadvantages of weak interfacial adhesion with matrices. The surface decoration of 3DGA with molybdenum disulfide (3DGA@MoS 2 ) further promoted the diffusion and penetration of epoxy molecular for 3DGA network with the aid of resin transfer molding (RTM) technic. The MoS 2 transition nanolayer not only forms covalent bonding with 3DGA but mechanical interlocks with epoxy, which effectively improved the interface combination in composite. Compared with neat epoxy, the glass transition temperature ( T g ) and tensile strength increased by 18°C and 58.6%, as well as the average friction coefficient and wear rate decreased by 84% and 89%, respectively, by low loading of only 2 wt% 3DGA@MoS 2 . Hence, the 3D graphene modified strategy by surface decoration provides a new insight for manufacturing high-performance epoxy-graphene composites with excellent tribological properties. Highlights A highly ordered and interconnected 3DGA reinforcement was fabricated. MoS 2 serves as interlayer, forming covalent bond and mechanical interlock. Incorporation of 3DGA@MoS 2 enables rapid heat conduction and load transfer. Bi-interpenetrating 3D structure/polymer network endows good wear resistance. Improved comprehensive properties ascribe to strong interface adhesion.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Jintao Liang,Ruijie Yan,Chunguan Chen,Xiaoqing Yao,Fei Guo,Runqiang Wu,Zhide Zhou,Jiejing Chen,Guiyin Li
The effective detection of biomarkers associated with hepatocellular carcinoma (HCC) is of great importance. Golgi protein 73 (GP73), a serum biomarker of HCC, has better diagnostic value than Alpha-fetoprotein (AFP) has been reported. In this paper, highly accurate fluorescence sensing platform for detecting GP73 was constructed based on fluorescence resonance energy transfer (FRET), in which nitrogen-doped graphene quantum dots (NGQDs) labelling with GP73 aptamer (GP73 Apt ) was used as fluorescence probe, and molybdenum disulfide @ reduced graphene oxide (MoS 2 @RGO) nanosheets was used as fluorescent receptors. MoS 2 @RGO nanosheets can quench the fluorescence of NGQDs-GP73 Apt owing to FRET mechanisms. In the presence of GP73, the NGQDs-GP73 Apt specifically bound with GP73 to from the deployable structures, making NGQDs-GP73 Apt far away from MoS 2 @RGO nanosheets, blocking the FRET process, resulting in fluorescence recovery of NGQDs-GP73 Apt . Under optimal conditions, the recovery intensity of fluorescence in the detection system is linearly related to the concentration of GP73 in the range of 5 ng/mL − 100 ng/mL and the limit of detection is 4.54 ng/mL (S/N = 3). Moreover, detection of GP73 was performed in human serum samples with good recovery (97.21–100.83%). This platform provides a feasible method for the early diagnosis of HCC, and can be easily extended to the detection of other biomarkers.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yangchen Zhu,Fei Wang,Beihai Zhou,Huilun Chen,Rongfang Yuan,Yiyue Zhang,HuanHuan Geng,Yuxin Liu,Hao Wang
Sulfadiazine (SDZ) entering the environment has an adverse impact on animal, plant, and human health, it is important to find effective ways to remove SDZ from the aquatic environment. This work comprehensively explored the degradation of SDZ by MoS 2 in photocatalysis and Fe 2+ activation of potassium peroxodisulfate (PDS) from both theoretical and experimental aspects. The PDS/Fe 2+ /MoS 2 system had a faster PDS conversion rate and a higher degradation efficiency for SDZ compared with PDS/Fe 2+ and PDS/MoS 2 . The degradation rate of the PDS/Fe 2+ /MoS 2 system to SDZ reached 97.1% within 60 mins. The degradation rate is higher under acidic conditions compared with alkaline conditions. Free radical capture experiments and EPR tests showed that the degradation of SDZ was the result of a variety of free radicals, among which the SO 4 · − , 1 O 2 and h + played a major role. The chemical morphology and composition of MoS 2 , as well as the changes in the concentration of Fe ions in different valence states were explored and the changes in the O-O and, S-O bond lengths, and differential charge density of PDS in the MoS 2 and, Fe 2+ /MoS 2 systems were calculated by DFT. The results showed that both MoS 2 and Fe 2+ significantly increased the conversion rate of PDS. The activation of PDS on the Fe-modified MoS 2 surface had stronger active sites. MoS 2 can promote the cycle of Fe 3+ /Fe 2+ and the conversion of PDS. According to the intermediate products measured by LC-MS/MS, as well as the frontier molecular orbitals and Fukui function diagrams of SDZ and SDZ* calculated by quantum chemistry, four degradation paths of SDZ were speculated and confirmed the existence of the self-sensitized photodegradation process of SDZ in the system.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Jinyu Bao,Xintao Jiang,Lingzhi Huang,Wei Quan,Chenxu Zhang,Yanan Wang,Haibo Wang,Yi Zeng,Weijin Zhang,Yongxiang Ma,Shansheng Yu,Xiaoying Hu,Hongwei Tian
Interfacial design and the co-catalyst effect are considered to be effective to achieve separation and transport of photogenerated carriers in composite photocatalysts . In this study, a Z-scheme heterojunction was successfully combined with a co-catalyst to achieve a highly efficient LaNiO 3 /g-C 3 N 4 /MoS 2 photocatalyst. MoS 2 flakes were loaded on a hybrid material surface, which was formed by LaNiO 3 nanocubes embedded on layered g-C 3 N 4 , and a good heterostructure with multiple attachment sites was obtained. Experimental studies confirmed that the Z-scheme heterojunction completely preserves the strong redox ability of the photogenerated electrons and holes. As a cocatalyst, MoS 2 further promoted interfacial charge separation and transport. The synergistic effect of the Z-scheme heterojunction and co-catalyst effectively realized the transfer of photogenerated carriers from “slow transfer” to “high transfer” and promoted water decomposition and pollutant degradation. Results revealed that under simulated sunlight irradiation, LaNiO 3 /g-C 3 N 4 /MoS 2 composites exhibit superior hydrogen evolution of 45.1 μmol h −1 , which is 19.1 times that of g-C 3 N 4 and 4.9 times that of LaNiO 3 /g-C 3 N 4 , respectively. Moreover, the LaNiO 3 /g-C 3 N 4 /MoS 2 Z-scheme photocatalyst exhibited excellent photocatalytic performance for antibiotic degradation and heavy-metal ion reduction under visible light . This study might provide some insights into the development of photocatalysts for solar energy conversion and environmental remediation.
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Biomaterials Advances
·
2024
·
IF 5.5
Guanglin Xu,Guanglan Peng,Jianping Yang,Mingcai Wu,Wanzhen Li,Jun Wang,Longbao Zhu,Weiwei Zhang,Fei Ge,Ping Song
Chronic refractory wounds caused by multidrug-resistant (MDR) bacterial and biofilm infections are a substantial threat to human health, which presents a persistent challenge in managing clinical wound care. We here synthesized a composite nanosheet AIPH/AMP/MoS 2 , which can potentially be used for combined therapy because of the photothermal effect induced by MoS 2 , its ability to deliver antimicrobial peptides, and its ability to generate alkyl free radicals independent of oxygen. The synthesized nanosheets exhibited 61 % near-infrared (NIR) photothermal conversion efficiency, marked photothermal stability and free radical generating ability. The minimal inhibitory concentrations (MICs) of the composite nanosheets against MDR Escherichia coli (MDR E. coli ) and MDR Staphylococcus aureus (MDR S. aureus ) were approximately 38 μg/mL and 30 μg/mL, respectively. The composite nanosheets (150 μg/mL) effectively ablated >85 % of the bacterial biofilm under 808-nm NIR irradiation for 6 min. In the wound model experiment, approximately 90 % of the wound healed after the 4-day treatment with the composite nanosheets. The hemolysis experiment, mouse embryonic fibroblast (MEFs) cytotoxicity experiment, and mouse wound healing experiment all unveiled the excellent biocompatibility of the composite nanosheets. According to the transcriptome analysis , the composite nanosheets primarily exerted a synergistic therapeutic effect by disrupting the cellular membrane function of S. aureus and inhibiting quorum sensing mediated by the two-component system. Thus, the synthesized composite nanosheets exhibit remarkable antibacterial and biofilm ablation properties and therefore can be used to improve wound healing in chronic biofilm infections.
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高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 4
·1-13
·
IF 5.3
Li Guiyin,Yan Ruijie,Chen Wei,Wu Runqiang,Liang Jintao,Chen Jiejing,Zhou Zhide
Golgi protein 73 (GP73) is a new serum marker associated with early diagnosis and postoperative assessment of hepatocellular carcinoma (HCC). Herein, an electrochemical/fluorescence dual-signal biosensor was designed for determination of GP73 based on molybdenum disulfide/ferrocene/palladium nanoparticles (MoS 2 -Fc-PdNPs) and nitrogen-doped graphene quantum dots (NGQDs). GP73 aptamer (Apt) was labeled with NGQDs to form the NGQDs-Apt fluorescence probe. MoS 2 -Fc-PdNPs served not only as the fluorescence quencher but also as electrochemical enhancer. The sensing platform (NGQDs-Apt/MoS 2 -Fc-PdNPs) was formed based on the fluorescence resonance energy transfer (FRET) mechanism. In the presence of GP73, the specific binding of NGQDs-Apt to GP73 interrupted FRET, restoring the fluorescence of NGQDs-Apt at λ ex/em = 348/438 nm and enhancing the oxidation current of Fc in MoS 2 -Fc-PdNPs at 0.04 V through differential pulse voltammetry (DPV). Under the optimal conditions, the DPV current change and fluorescence recovery have a good linear relationship with GP73 concentration from 1.00 to 10.0 ng/mL. The calibration equation for the fluorescence mode was Y 1 = (0.0213 ± 0.00127) X + (0.0641 ± 0.00448) and LOD was 0.812 ng/mL (S/N = 3). The calibration equation of the electrochemical mode was Y 2 = (3.41 ± 0.111) X + (1.62 ± 0.731), and LOD of 0.0425 ng/mL (S/N = 3). The RSDs of fluorescence mode and electrochemical mode after serum detection were 1.62 to 5.21% and 0.180 to 6.62%, respectively. By combining the electrochemical and fluorescence assay, more comprehensive and valuable information for GP73 was provided. Such dual-mode detection platform shows excellent reproducibility, stability, and selectivity and has great application potential. Graphical Abstract
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Haohao Sun,Yan Gao,Narisu Hu,Yongxia Zhang,Chongshen Guo,Guanggang Gao,Zhuo Ma,Krasnyuk Ivan Ivanovich,Yunfeng Qiu
Peroxidase nanoenzymes exhibit a specific affinity toward substrates, thereby demonstrating application potential for realizing the colorimetric immunoassays of hydrogen peroxide (H 2 O 2 ), which can be further used as a probe for imaging cancer cells. To enhance the intrinsic peroxidase activity of molybdenum sulfide (MoS 2 ) nanomaterials , gold (Au) nanoparticles with an average diameter of approximately 2.1 nm were modified on a MoS 2 /carbon surface (denoted as MoS 2 /C-Au 600 ) via ascorbic acid reduction. MoS 2 /C-Au 600 can oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to generate a blue oxidation product in the presence of H 2 O 2 ; this product exhibits peroxidase-like activities, superior to those of most existing MoS 2 -based nanoenzymes. Furthermore, MoS 2 /C-Au 600 exhibits a high detection capability for H 2 O 2 in the range of 1 × 10 −5 to 2 × 10 −4 mol/L (R 2 = 0.99), and the lowest detection limit is 1.82 µmol/L in a sodium acetate and acetic acid buffer solution . Steady state kinetics studies indicate that the catalytic mechanism is consistent with the ping-pong mechanism. Given its strong absorption peak at 652 nm in the visible region, MoS 2 /C-Au 600 can be used to image cancer cells due to the enhanced permeability and retention effect . Our findings demonstrate that the synergistic electronic coupling between multiple components can enhance the peroxidase activity, which can facilitate the development of an effective, facile, and reliable method to perform colorimetric immunoassays of H 2 O 2 and cancer cells.
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ENVIRONMENTAL ENGINEERING SCIENCE
·
2021
·Vol. 38
·期 12
·1149-1157
·
IF 1.907
Zhimeng Zhang,Yuqin Wang,Feng Jiang,Qingjing Liu,Di Lang
Fenton reaction is extensively used in wastewater treatment to produce •OH, which can be used to remove organic pollutants excellently. However, the greatest issue of the process is the low efficiency of Fe2+/Fe3+ conversion cycle and hydrogen peroxide (H2O2) decomposition rate (<30%). In this study, molybdenum disulfide (MoS2) was used as a co-catalyst in Fenton system to accelerate the oxidation of acid orange 7 (AO7) dye. The enhanced removal efficiency was attributed to that the unsaturated S atoms on the surface of MoS2 could capture the protons in solutions and turn into H2S, exposing the active sites with reducibility and accelerating the conversion of Fe2+/Fe3+. A high degradation rate of 98% was obtained in 30 min under the optimal conditions of AO7 concentration 100 mg/L, MoS2 6 g/L, FeSO4·7H2O 50 mg/L, H2O2 concentration 1.5 mmol/L, and pH 3.5. Furthermore, the degradation pathway and mechanism of AO7 were thoroughly discussed. The toxicity of the intermediates during the degradation progress slightly increased initially, which then decreased to nontoxicity. MoS2 can keep stable, which can maintain high AO7 removal efficiency even after being reused for seven times. Moreover, the obtained results provide a theoretical basis and guidance for the application of inorganic co-catalyst in practical wastewater remediation applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yinghong Ji,Xiaoyan Ding,Yanjun Xue,Jingjing Wang,Jian Tian
The formation of composites by loading co-catalysts on semiconductor photocatalysts to improve hydrogen (H 2 ) evolution performance is a feasible strategy. Metallic 1T phase molybdenum disulfide (MoS 2 ) as cocatalysts were decorated on zinc indium sulfide (ZnIn 2 S 4 ) nanoflowers by a grinding method to construct 1T-MoS 2 @ZnIn 2 S 4 composites. The H 2 production rate of 1T-MoS 2 @ZnIn 2 S 4 composites with optimum 7 wt% 1T-MoS 2 loading achieves 15.6 mmol g −1 h −1 , 5.5 times higher than ZnIn 2 S 4 nanoflowers. The apparent quantum efficiency (AQY) increases from 3.1 % (ZnIn 2 S 4 nanoflowers) to 13.0 % (1T-MoS 2 @ZnIn 2 S 4 composites) under the wavelength light irradiation at λ = 370 nm. The loading of metallic 1T-MoS 2 with abundant edge and substrate active sites on ZnIn 2 S 4 can enhance visible light absorption, promote the transfer of electrons, and inhibit carrier recombination, thereby improving photocatalytic performance. This work offers inspiration for the design of composite photocatalysts with efficient photocatalytic capabilities.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yun Dou,Shen Li,Xinxin Zhu,Xia Meng,Shoujuan Wang,Magdi E. Gibril,Fangong Kong
The anticipated development of modern lithium-ion batteries (LIBs) has significantly slowed down due to safety concerns, and the fabrication of sophisticated separators is considered a necessary approach to enhance the safety of LIBs. Recently, the use of crosslinked hydrogel nanofiber membranes as LIBs has demonstrated encouraging outcomes. Nevertheless, their mechanical properties still require enhancement. This study introduces a simple method for preparing hybrid composite crosslinked hydrogel nanofiber membranes of acrylamide (AM) and polyvinyl alcohol (PVA) reinforced with nanofiller of molybdenum disulphide nanosheets loaded on lignin (MoS 2 @L). Initially, MoS 2 @L nanofiller was prepared by using lignin as a substrate to enhance MoS 2 dispersion and also to improve its compatibility with the nanofibers matrix. Subsequently, an electrospinning-polymerization technique was used to prepare a crosslinked hydrogel nanofiber membrane of PVA and AM with different amounts of MoS 2 @L. The optimal ratio of electrospinning solution with nanofiller (MoS 2 @L) content were determined. The incorporation of MoS 2 @L revealed that the PVAM-MoS 2 @L composite hydrogel nanofiber separator had the maximum tensile strength (16.5 MPa). The PVAM-MoS 2 @L separator demonstrated high electrolyte absorption capacity (687.4 %), high porosity (85.3 %), high ion conductivity (3.13 mS/cm), and a high lithium-ion transfer number (tLi+ = 0.563). Notably, the PVAM-MoS 2 @L separator enabled coin cells to exhibit commendable electrochemical performance. Compared to the PVA and Celgard separators, the PVAM-MoS 2 @L separator maintained a higher capacity retention of 82.7 % (117.3 mAh/g) even after 500 cycles at 1C. These results underscore the potential of the PVAM-MoS 2 @L separator as a high-performance, safe, and commercially viable alternative for next-generation LIBs.
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NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 19
·11353-11360
·
IF 3.269
Baoshan He
In this work, a sensitive sandwich-type biosensor for detecting alpha-fetoprotein (AFP) is developed by using a target-triggered hybridization chain reaction strategy. An Au nanoparticles (AuNPs)/hollow molybdenum disulfide (MoS2) microbox hybrid is prepared and used as the supporting substrate of the biosensor. The sensing system mainly consists of three parts as follows: first, primary antibodies (Ab1) are immobilized on the surface of AuNPs; second, secondary antibodies (Ab2) conjugate with the DNA primer; third, long DNA concatemers from the HCR are used as a carrier for horseradish peroxidase enzymes via a biotin–avidin reaction. A sandwich complex is formed among primary antibodies, target AFP and secondary antibodies conjugated with the DNA primer via a specific recognition reaction. Afterwards, the amperometric technique is applied to record the current response of a hydrogen peroxide + hydroquinone system. A sensitive assay is developed for AFP with a linear range of 0.00005–75 ng mL−1. An ultra-low detection limit of 2.0 fg mL−1 with excellent selectivity for even discriminating differences between various proteins and AFP is achieved. Furthermore, the biosensor is successfully applied to detect target AFP in human serum samples. This sensitive method is also promising for the determination of other biomolecules.
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ChemSusChem
·
2023
·
IF 8.4
Yaobing Fang,Wen Zheng,Tao Hu,Hong Xiao,Li Li,Wenhui Yuan
Graphical This Graphite paper/(SnS 2 -MoS 2 )@CNTs dual-ion battery shows excellent cycling performance and fast charging capacity, which could provide a new insight for the designing of high-performance energy storage device. Dual-ion batteries have been considered as a competitive energy-storage device. However, owing to the lack of suitable high-capacity density and rapid-charging electrode materials, designing a cost-effective and high-performance dual-ion battery is still a great challenge. Herein, an ultrahigh-capacity dual-ion battery is constructed based on a carbon-nanotubes (CNTs) containing SnS 2 -MoS 2 @CNTs heterojunction anode and highly crystalline free-standing graphite paper serves as cathode. The SnS 2 -MoS 2 @CNTs heterojunction consisting of ultrathin nanosheets was prepared via a facile two-step hydrothermal method and shows flower-like morphology and high crystallinity. Benefiting from the unique design concept, the graphite paper/SnS 2 -MoS 2 @CNTs dual-ion battery delivers a high capacity of 274.2 mAh g −1 at 100 mA g −1 and has an outstanding capacity retention of 95 % after 300 cycles under 400 mA g −1 . Even at a high current density of 2 A g −1 the battery still retains a considerable capacity of 112.3 mAh g −1 . More importantly, the battery shows an extremely low self-discharge of 0.006 % h −1 after resting for 24 h. Characterization using SEM and XRD further demonstrate the excellent cycling stability and good reversibility. Consequently, this constructed dual-ion battery could be a promising energy storage device and provide new insights for the design of high-performance dual-ion batteries.
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