MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Yuan Wang,Bihong Zhang,Yun Tang,Faqiong Zhao,Baizhao Zeng
A molecularly imprinted polymer/ Au nanoparticles-MoS 2 -graphene/GCE sensor was fabricated and used for the electrochemical detection of rutin. The rose-like Au nanoparticles-MoS 2 -graphene composite (AuNPs-MoS 2 -GN) was fabricated by using a one-pot hydrothermal method. Graphene acted as an efficient matrix for the growth of MoS 2 nanoflower (NF), and the edges of the MoS 2 NF subsequently loaded AuNPs. The AuNPs-MoS 2 -GN composite had large specific surface area, good conductivity and high catalysis, and showed excellent electrochemical response to rutin. To improve the selectivity, rutin imprinted chitosan film was electrodeposited on the AuNPs-MoS 2 -GN/GCE. The obtained molecularly imprinted sensor had strong adsorption capacity for rutin. Under the optimized conditions, the sensor showed a low detection limit (i.e. 4 nmol L −1 ) and a wide detection range (i.e. 0.01–45.0 μmol L −1 ). It also displayed high stability and selectivity. When the sensor was applied to the determination of rutin in real samples satisfactory results were achieved.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Hang Chen,Ya-Qi wang,Fei Huang,Chao Tu,li Cui
A novel strategy for preparing Zeolitic Imidazolate Frameworks-8 (ZIF-8) based photocatalytic material with high efficiency, durability and recyclability is proposed. ZIF-8 is prepared by self-assembly layer-by-layer on carboxyl cotton fabric. The coordination bond formed by metal ions and carboxyl groups of carboxyl cotton fabric greatly enhances the interaction between particles and fabric. Semiconductor MoS 2 is grown in situ on the surface of ZIF-8 to improve photocatalytic activity of ZIF-8. The morphology and structure of prepared MoS 2 /ZIF-8/Carboxyl cotton are characterized. The influence of layer-by-layer self-assembled ZIF-8 on the charge separation efficiency and optical properties of functional materials are investigated by electrochemical impedance spectroscopy and photocurrent. Under visible light irradiation, this functionalized fabric has good degradability to methylene blue. About 99.8% of methylene blue aqueous solution is degraded after exposure to visible-light for 21 min. Furthermore, about 94.8% photocatalytic activity is still maintained even after six times of recycling. Possible mechanisms accounting for the enhanced photocatalytic properties are proposed. This fabrication method used in this study shows great potential in the development of textile-based multifunctional photocatalytic materials with high degradation efficiency and high recovery rate.
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Journal of Environmental Sciences
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2021
·
IF 5.565
Wen Zhou,Jiale Deng,Zhen Qin,Ruihua Huang,Yi Wang,Shanshan Tong
Toxic heavy metal ions, valuable noble metal ions and organic dyes are significant concerns in wastewater treatment. In this work, MoO 3 nanobelts (MoO 3 NBs) prepared by solvothermal method and MoS 2 nanoarrays (MoS 2 NAs) constructed using MoO 3 NBs precursor were proposed to effectively remove heavy/noble metal ions and organic dyes, such as Pb (II) , Au (III) and Methylene Blue (MB). The two adsorbents exhibited the excellent adsorption capacity towards Pb (II) , Au (III) and MB. The maximum removal capacity of Pb (II) and MB on MoO 3 NBs was 684.93 mg/g and 1408 mg/g, respectively, whereas that of Au (III) and MB on MoS 2 NAs was 1280.2 mg/g and 768 mg/g, respectively. Furthermore, the thermodynamic parameters were calculated from the temperature-dependent curves, suggesting that the removal of Pb (II) and Au (III) on both adsorbents was spontaneous and endothermic. The new adsorbents introduced here were high adsorption activity, ease of fabrication, high scalability, good chemical stability, great repeatability and abundant and cheap supply, which were highly attractive for wastewater treatment.
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高影响因子
CATALYSIS LETTERS
·
2021
·Vol. 152
·期 1
·263-275
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IF 3.186
Wei Jian,Huang He,Luo Qinglong,Liu Na,Wang Xueying,Wang Xuefeng,Zhong Mei,Huang Xueli
Few layer (< 5 layers) MoS 2 mixed with a 1T phase has the characteristics of a large specific surface area and an improved active site distribution. Therefore, it has been increasingly study for the catalytic hydrodesulfurization of polycyclic compounds. In this paper, few-layer MoS 2 with a high proportion of the 1T phase is synthesized by a one-step solvothermal method using a green non-toxic ethanol/water solvent. Results show that few-layer MoS 2 (3–5 layers) with a 1T phase up to 48% can be synthesized in a 50% ethanol solvent. This MoS 2 is used to catalyse the hydrodesulfurization reaction of dibenzothiophene, and the target product conversion rate reaches 84.2%. Among them, biphenyl accounts for 70.2%, phenylcyclohexane accounts for 13.9%, and bicyclohexane accounts for 0.4%. According to the Hansen solubility parameter (HSP) distance Ra, the effects of solvents on the structure and morphology of MoS 2 and the conversion of dibenzothiophene hydrodesulfurization are determined. This work is significant for the synchronous synthetic exfoliation of MoS 2 with a controllable number of layers, a higher ratio of the 1T phase and good catalytic HDS of polycyclic compounds. Graphic Abstract Few layers and high proportion of 1T phase MoS 2 by solvothermal synthesis for catalytic hydrodesulfurization of dibenzothiophene.
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Materials
·
2021
·Vol. 14
·期 13
·3561
·
IF 3.623
Lewen Fan,Lizhuang Yang,Dongdong Zhao,Liying Ma,Chunnian He,Fang He,Chunsheng Shi,Junwei Sha,Naiqin Zhao
In this work, few-layered MoS2(FLM) nanosheet-reinforced Al matrix composites are developed through powder metallurgy and hot extrusion. The microstructure, mechanical properties, and strengthening mechanisms have been systematically investigated. It is found that Al12Mo and Al2S3can be formed in-situ during the sintering process, resulting in the improvement of interfacial bonding between FLM and Al matrix. With 1.5 wt.% of FLM addition, an improved tensile strength of 234 MPa with a high elongation of 17% can be obtained. Moreover, the strengthening mechanisms are also demonstrated to be grain refinement, dislocation strengthening, and load transfer, and the calculation indicates that load transfer is the main contribution factor. This work will inspire more new designs of metal matrix composites with balanced strength and ductility.Keywords:aluminum;metal matrix composites (MMCs);MoS2nanosheets;microstructure;mechanical property;strengthening mechanism
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高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 6
·1-10
·
IF 5.833
Zhang Ze,Yu Hongwei,Zhang Yingcong,Wang Zhangmin,Gao Hongmin,Rong Shengzhong,Meng Lingqiang,Dai Jianmin,Pan Hongzhi,Chang Dong
A sandwich-format electrochemiluminescence (ECL) immunosensor has been developed for alpha-fetoprotein (AFP) detection based on the use of ordered mesoporous carbon-molybdenum disulfide (OMC-MoS 2 ) as a sensor platform and cuprous oxide @ ordered mesoporous carbon-Ru(bpy) 3 2+ (Cu 2 O@OMC-Ru) composites as signal tags. OMC alongside MoS 2 plays a synergistic role in improving the electrochemical performance of the electrode in the electron transfer process. The uniform cubic-shaped Cu 2 O@OMC-Ru nanocrystals display excellent luminous efficiency, with a signal amplification strategy of OMC-MoS 2 synergistic enhancement and Cu 2 O@OMC which is capable of immobilizing more Ru(bpy) 3 2+ serving as a tracing tag to label antibodies. A detectable ECL emission at a Cu 2 O@OMC-Ru nanocrystals modified electrode is initiated at an applied voltage of +1.15 V (scanning range: 0–1.2 V), in the presence of the tripropylamine (TPA) as coreactant. With the increase in AFP concentration, the loading of Cu 2 O@OMC-Ru at the electrode increases. Afterward, the ECL detection of AFP shows a wide linear range from 0.1 pg/mL to 10 ng/mL with a correlation coefficient of 0.9964 and a detection limit of 0.011 pg/mL (S/ N = 3) under the optimal experimental conditions. The recoveries were in the range 91.2–97.1% with RSD varying from 4.8 to 8.5%. Overall, the novel immunosensor has been successfully applied to the analysis of human serum samples, indicating a great potential for application in clinical diagnostics. Graphical abstract
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
·
IF 10.652
Huili Zheng,Baoxin Ma,Yesi Shi,Qixuan Dai,Dongsheng Li,En Ren,Jing Zhu,Jianming Liu,Hu Chen,Zhenyu Yin,Chengchao Chu,Xiaomin Wang,Gang Liu
We report the preparation of gallic acid (GA)-modified MoS 2 nanosheets (MoS 2 @GA) with high Fe(III) loading. The MoS 2 @GA-Fe can function as a “Fenton Nanoreactor” in the tumor microenvironment (TME), in which GA-Fe(III) can be reduced to GA-Fe(II) by glutathione (GSH) and amounts of reactive hydroxyl radicals (•OH) are generated during the Fenton reaction. Notably, the MoS 2 degrades into small fragments during the process, and more Mo(IV) reaction sites are exposed on the surface, resulting in a “snowball effect” and enhanced •OH production. Furthermore, unsaturated S atoms can capture protons in the TME and form hydrogen sulfide (H 2 S). We combined the photoacoustic imaging and magnetic resonance imaging contrast properties of MoS 2 @GA-Fe and constructed an imaging-guided chemodynamic treatment, featuring excellent antitumor efficiency and biosafety. The TME-responsive “Fenton Nanoreactor” provides a promising strategy with enhanced translational potency for tumor therapy.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yiming Zhang,Xiaoyan Yang,Yonglin Wang,Peng Zhang,Dan Liu,Yongwei Li,Zhouzheng Jin,Bhekie B. Mamba,Alex T. Kuvarega,Jianzhou Gui
For obtaining ultra-fine Cu 2 S nanoparticles with reduced recombination of their photogenerated electron/hole pairs, in-situ growth of Cu 2 S nanoparticles on exfoliated MoS 2 nanosheets was achieved in this study. We have exhaustively studied l -cysteine in-situ conjugation with sulfur defects on the surface of MoS 2 nanosheets, which makes particle-level superlattice structured Cu 2 S nanoparticles (average 6.2 nm) well disperse on MoS 2 nanosheets. Further, XPS and Raman analysis confirm that the intense interfacial effects are formed between Cu 2 S and MoS 2 for the 2-Cu 2 S-MoS 2 composite, which significantly promote separation of photogenerated electron-hole pairs and prolong their lifetime, as shown by PL and TRPL. As a result, 2-Cu 2 S-MoS 2 exhibits the fastest photoreduction rate of Cr(VI) (0.0058 min −1 ) under visible light irradiations, which are almost 8.3 times and 2.9 times higher than that of MoS 2 nanosheets (0.0007 min −1 ) and pure Cu 2 S (0.002 min −1 ), respectively. Meanwhile, 2-Cu 2 S-MoS 2 also possesses an optimal composite proportion between Cu 2 S and MoS 2 , which presents outstanding photocatalytic activity among series of x-Cu 2 S-MoS 2 composites. The photoreduction mechanism of Cr(VI) is investigated in detail. As a matter of fact, l -cysteinecoupled with sulfur defects on MoS 2 nanosheets could produce the coordination inner heterojunction interface of 2-Cu 2 S-MoS 2 samples, which greatly improves migration efficiency of photoinduced carriers and ultimately endows it outstanding photoreduction activities. Furthermore, the strategy was extended to fabricate CdS-MoS 2 and ZnS-MoS 2 heterojunctions, implying that this strategy is of promising potentials for designing more active metal sulfides heterojunction photocatalysts.
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高影响因子
Chemistry-An Asian Journal
·
2020
·Vol. 15
·期 8
·1315-1323
·
IF 4.056
Xin Zhang,Yanfang Gao
Graphical A 2D/2D hexagonal boron nitride (h-BN) and nitride doped molybdenum disulfide (N−MoS 2 ) heterostructure (h-BN/N−MoS 2 ) catalyst was prepared by sonication using a solvothermal method. The catalyst breaks down H 2 O 2 to produce hydroxyl radical and further oxidizes the colorless TMB to produce blue oxTMB. Recently, nanozymes have attracted extensive attention because of their advantages of combining nanomaterials with enzymes. Herein, hexagonal boron nitride (h-BN) and nitride-doped molybdenum disulfide (N−MoS 2 ) nano-composites (h-BN/N−MoS 2 ) were synthesized by facile and cost-effective liquid exfoliation with a solvothermal method in nontoxic ethanol solution. The results show that h-BN, as a co-catalyst, can not only dope into the lattice of MoS 2 but also form a heterogeneous structure with MoS 2 NSs. It expanded the layer spacing and specific surface area of MoS 2 NSs, which was beneficial to the contact between the catalyst and the substrate, and resulted in a synergistic enhancement of the catalytic activity of hydrogen peroxide (H 2 O 2 ) with MoS 2 . A colorimetric determination platform of h-BN/N−MoS 2 -TMB-H 2 O 2 was constructed. It exhibited a wide linear range of 1–1000 μM with a low limit of detection (LOD) of 0.4 μM under optimal conditions, high sensitivity and stability, as well as good reliability (99.4–110.0%) in practice, making the measurement system more widely applicable.1. Introduction
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Yanguo Liu,Jiayuan Chen,Chang Xu,Tingli Yu,Zhipeng Li,Zhiqiang Wei,Lizhi Qian,Yanfen Wan,Peng Yang,Zhiyuan Wang,Shaohua Luo,Hongyu Sun
Ultrathin nanosheets made by transition metal dichalcogenide show the potential as high-capacity anode materials for lithium ion batteries (LIBs). However, the tendency of restacking individual nanosheet due to strong van der Waals force , a dramatic volume variation upon continuous cycling, as well as poor intrinsic conductivity greatly restrict their practical applications. In this work, high content metallic phase molybdenum disulfide (1T/2H–MoS 2 ) ultrathin nanosheets with higher intrinsic conductivity and extended interlayer distance are vertically assembled on the outer surface of chemically activated hollow carbon nanospheres (CAHCSs) through a facile solvothermal method . Phase structure, chemical composition , and microstructure studies show that the obtained composites (CAHCSs@1T/2H–MoS 2 ) have optimized structural and compositional advantages to efficiently store lithium ions . When evaluated as anodes for LIBs, the CAHCSs@1T/2H–MoS 2 electrode show excellent fast and stable lithium storage properties. In specific, the CAHCSs@1T/2H–MoS 2 electrode delivers a large reversible capacity of 831 mAh g −1 at 1 A g −1 after 200 cycles. At a higher current density of 2 A g −1 , the CAHCSs@1T/2H–MoS 2 electrode has a reversible capacity of 863 mAh g −1 . The proposed electrode design strategy provides an alternative route to promote the ion storage in transition-metal-dichalcogenides-based materials.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 33
·14291-14298
·
IF 3.288
Shou-Qing Liu,Kuang-Zheng Huang,Wen-Xiao Liu,Ze-Da Meng,Li Luo
Hydrogen is a clean shuttle of energy storage that can naturally reserve solar and wind energy. However, the lack of safe and efficient storage for hydrogen in a tank for use in automobiles limits its widespread use. Therefore, developing an on-board storage and controlling the release of hydrogen are important for the practical application of hydrogen fuels. This article reports a cobalt-doped MoS2 catalyst that enhances the safe release of hydrogen from aqueous ammonia borane by piezo-photocatalysis. The results indicate that the H2 yield of cobalt-doped MoS2 was 4.84 times that of pristine MoS2 under an ultrasonic and the 850 nm near-infrared irradiation conditions. The piezo-current of the cobalt-doped MoS2 was observed for the first time by an electrochemical technique. A reaction mechanism is proposed for hydrogen evolution based on an enhanced built-in field in cobalt-doped MoS2 lattices under piezo-electric conditions.
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高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 10
·107505
·
IF 3.721
Peijin Wang,Qian Wu,Caixia Wang,Yuxin Pu,Mao Zhou,Mingxiao Zhang
In this work, a sensitive polyethylenimine functionalized Perylene derivative PTC-PEI, S2O82− and 3D flower-like MoS2 (3D MoS2 NFs) ternary system was fabricated for quantitation of Methotrexate (MTX) based on the quenched electrochemiluminescence (ECL) signals. Specifically, the PTC-PEI was prepared via cross-linking Perylenetetracarboxylic acid (PTCA) and polyethylenimine (PEI). Then, the hybrid nanocomposite PTC-PEI-MoS2 was synthysized through electrostatic absorption effect between PTC-PEI and 3D MoS2 NFs. With the excellent catalytic effect of 3D MoS2 NFs towards the electrochemical reduction process of S2O82− thus resulting in generation of more sulfate radical anions (SO4·−), the ECL signal probe PTC-PEI-MoS2 exhibits higher luminous efficiency compared with PTC-PEI (3-fold enhancement). In addition, electrochemical regenerable property of Mo6+/Mo4+ active sites endows 3D MoS2 NFs excellent signal enhancement efficiency. Under the optimum conditions, a linear range from 10 μM to 1pM with the limit of detection down to 0.15 pM could be obtained in MTX determination. Notably, the proposed strategy provides a new idea for sensitive determination of MTX.
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