ACS Applied Materials & Interfaces
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2021
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IF 9.229
Xiaoqi Mao,Yongjin Zou,Fen Xu,Lixian Sun,Hailiang Chu,Huanzhi Zhang,Jian Zhang,Cuili Xiang
The three-dimensional (3D) architecture of electrode materials with excellent stability and electrochemical activity is extremely desirable for high-performance supercapacitors. In this study, we develop a facile method for fabricating 3D self-supporting Ti3C2 with MoS2 and Cu2O nanocrystal composites for supercapacitor applications. MoS2 was incorporated in Ti3C2 using a hydrothermal method, and Cu2O was embedded in two-dimensional nanosheets by in situ chemical reduction. The resulting composite electrode showed a synergistic effect between the components. Ti3C2 served as a conductive additive to connect MoS2 nanosheets and facilitate charge transfer. MoS2 acted as an active spacer to increase the interlayer space of Ti3C2 and protect Ti3C2 from oxidation. Cu2O effectively prevented the collapse of the lamellar structure of Ti3C2–MoS2. Consequently, the optimized composite exhibited an excellent specific capacitance of 1459 F g–1 at a current density of 1 A g–1. Further, by assembling an all-solid-state flexible supercapacitor with activated carbon, a high energy density of 60.5 W h kg–1 was achieved at a power density of 103 W kg–1. Additionally, the supercapacitor exhibited a capacitance retention of 90% during 3000 charging–discharging cycles. Moreover, high mechanical robustness was retained after bending at different angles, thereby suggesting significant potential applications for future flexible and wearable devices.
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高影响因子
Journal of Materials Chemistry C
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2021
·Vol. 9
·期 21
·6823-6833
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IF 7.393
Yingjiao Zhai,Hui Yang,Sinan Zhang,Jinhua Li,Kaixi Shi,Fangjun Jin
The controllability of materials that has attracted widespread attention is a key factor for improving the performance of SERS substrates. Hence, in this study, a kind of controllable materials constructed with Au nano-disk array and monolayer MoS2 had been developed. The optical properties of the composite were studied and the Raman enhancement was obtained. Compared with the monolayer MoS2, the peak of the above composite was slightly red-shifted, and the intensity was increased by about 2.5 times. This was due to the thermal effect and the internal quantum efficiency improvement of MoS2 caused by the local surface plasmon resonance of Au. The simulation results of the finite-difference time-domain and the experimental results all showed an enhanced photoluminescence of the composite, which was attributed to the resonance wavelength of the Au nano-disk being adjusted to be consistent with the photoluminescence peak of the monolayer MoS2. Through the synergistic action of the electromagnetic enhancement and chemical enhancement, the highly sensitive and stable surface-enhanced Raman scattering (SERS) active substrate constructed with Au-MoS2 composite was sequentially utilized in the detection of antibacterial agent residues on the aquatic products. Thereafter, a calibration curve with ultralow limits of detection (LOD) at 10−15 M was established for the standard solutions of crystal violet (CV), and then the assay on shrimps was successfully realized. Therefore, this research provides an effective way for attractive SERS performance of MoS2, and confirms the potential possibility for application on food safety and other trace detection.
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JOURNAL OF MEMBRANE SCIENCE
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2021
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IF 8.742
Mengting Di,Yanxue Xiu,Ziwei Dong,Lei Hu,Li Gao,Yan Dai,Xiaoming Yan,Ning Zhang,Yu Pan,Xiaobin Jiang,Gaohong He
A novel double-layer composite membrane with a MoS 2 -rich layer and a polymer-rich layer is prepared by the method of one-step slow solvent evaporation for vanadium redox flow batteries . The composite membrane is composed of MoS 2 nanosheets as protecting layer, providing the membrane with lower VO 2+ permeability and excellent chemical stability, and sulfonated modified PBI as substrate, providing high proton conductivity. The introduction of MoS 2 nanosheets greatly reduces the area resistance of the PBI-PS/MoS 2 membrane (0.42 Ω cm 2 ), which is comparable to that of Nafion 212 (0.41 Ω cm 2 ). The cell equipped with PBI-PS/MoS 2 membrane presents improved coulombic efficiencies and energy efficiencies. At 200 mA cm −2 , a high EE of about 80% is achieved. The cell maintains stable performances for nearly 800 cycles, showing impressive durability. The cell also shows a self-discharge rate of as low as 0.0021 V h −1 . The MoS 2 nanosheets layer based composite membrane is promising for VRBs.
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高影响因子
Journal of Cleaner Production
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2021
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IF 9.297
Yanping Cui,Zhengwei Zhou,Ya Gao,Lidan Lei,Jungang Cao,Ruojie Wu,Lili Liang,Zhaoqiang Huang
Without external O 2 supply and solution pH adjusting, commercial molybdenum sulfide (MoS 2 ) was firstly applied as co-catalyst in intermittent electro-Fenton process for Rhodamine B (RhB) degradation. In this energy saving system, Fe 2+ /Fe 3+ conversion was facilitated and H 2 O 2 activating was accelerated by MoS 2 . Granular activated carbon wrapped with stainless steel mesh (GACSS) was used as cathode, from which, H 2 O 2 and iron sources were in-situ generated. With 0.1 g/L MoS 2 , and 50 mA applied current with 10 min on-10 min off power frequency, RhB degradation rate constant in the MoS 2 intermittent electro-Fenton was approximately 2.4 times as that without MoS 2 system. Quenching experiments, electron spin resonance (ESR) characterization and free radical fluorescence tests demonstrated hydroxyl radicals (·OH) was the dominant reactive species, and the superiority of intermittent electrolysis mode for RhB degradation. During power on, H 2 O 2 was constantly generated on cathode. In electricity interval, Fe 2+ /Fe 3+ conversion was accelerated on the active sites (Mo 4+ ) to activate residual H 2 O 2 and more ·OH was generated to RhB degradation. Additionally, the characterization analysis (XPS, SEM and FT-IR) demonstrated MoS 2 and GACSS cathode exhibited excellent catalytic and chemical stability in recyclability . Low-cost multifunctional cathode with a high efficiency co-catalyst was combined in this energy saving electro-Fenton operating system for RhB degradation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Junnan Tao,Xiaohui Yu,Qinqin Liu,Guiwu Liu,Hua Tang
The requisite interfacial contact of heterojunction photocatalysts has a significant contribution in separation of interfacial charge carriers for photocatalytic hydrogen (H 2 ) evolution in a more efficient manner. Herein, an internal electric field (IEF)-induced S–scheme system comprised of two-dimensional (2D) CoAl layered double hydroxide (LDH) and 2D molybdenum disulfide (MoS 2 ) was constructed via a simple hydrothermal process. In the presence of visible-light irradiation, the 2D/2D MoS 2 /CoAl LDH hybrid demonstrates eightfold greater photocatalytic H 2 generation rate as compared with that of CoAl LDH. The mechanism was investigated in the light of the results of the X-ray photoelectron spectroscopy (XPS) and work-function calculated by density functional theory (DFT) simulation, and the improved activity was ascribed to that the rapid detachment of the electron-hole (e − -h + ) combinations and high redox ability, both are simultaneously realized in MoS 2 /CoAl LDH hybrid with a 2D/2D S–scheme charge transfer mechanism induced by the IEF across interface of the MoS 2 and CoAl LDH. Furthermore, favorable 2D/2D structure and better H* adsorption behavior of MoS 2 /CoAl LDH also promoted the improvement of water reduction performance. This work is a valuable guideline in developing of IEF-induced S–scheme photocatalysts with 2D/2D architecture for improved photocatalytic performance.
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高影响因子
CHEMICAL PHYSICS LETTERS
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2020
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IF 2.029
Ying Zhai,Dongmei Zhu,Qiang Chen,Hanyi Nan
Herein, we report a novel multi-component electromagnetic microwave absorber with oriented flaky carbonyl iron&MoS 2 (FCI&MoS 2 ) as fillers and polyurethane (PU) as matrix. The SEM and VNA were utilized to analyze the morphology, electromagnetic and microwave absorption properties of the prepared oriented FCI&MoS 2 /PU composites with different multi-component proportions. The reflection loss (RL) and Z in /Z 0 values are calculated based on the complex permittivity and permeability. The results demonstrate that the oriented arrangement, synergistic effect and appropriate proportion of FCI&MoS 2 fillers are contributed to improve the impedance matching and microwave attenuation of the prepared composites at thin thicknesses of 0.8 mm and 0.9 mm.
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高影响因子
Applied Nanoscience
·
2021
·Vol. 11
·期 3
·841-847
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IF 3.674
Yi J.,Yang M. M.,Luo X. D.,Rosenkranz A.,Wang B.,Song H.,Jiang N.
This study aims at assessing the tribological performance of novel self-lubricating chemical vapor-deposited MoS 2 coatings binary-doped with antimony (Sb) and silver (Ag). The Sb/Ag-doped MoS 2 composite coatings showed an excellent solid lubrication performance with low and constant coefficients of friction of about 0.1 for a sliding time of 6 h. Estimations of the underlying wear rates revealed a reduction of the resulting wear rate by two orders of magnitude for the binary-doped Sb/Ag–MoS 2 composite coatings (2.43 ± 0.27 × 10 –7 mm 3 /Nm versus 2.70 ± 0.44 × 10 –5 mm 3 /Nm for un-doped MoS 2 coating), which reflects an outstanding wear resistance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Wenya Xu,Wen Wang,Simou Chen,Rui Zhang,Yuxin Wang,Qi Zhang,Lihui Yuwen,Wen Jing Yang,Lianhui Wang
The fabrication of flexible electronic sensors with self-healing capability is of great importance for the applications in wearable devices and skin-like electronics. Herein, a molybdenum disulfide (MoS 2 ) nanosheets-based hydrogel (Gel-PEG-MoS 2 , GPM hydrogel), with near infrared (NIR) light-induced self-healing property, was first reported as a flexible sensor. Only a small amount of MoS 2 nanosheets (0.04 wt‰) could impart the hydrogel with fast self-healing property under NIR irradiation in 90 s. The healing efficiencies increased with the increasing of MoS 2 loadings. Moreover, the GPM hydrogel exhibited both contact and noncontact sensing properties based on its deformation-dependent and light-sensitive conductivity, showing potential application as mechanical sensor and light-activated switches. By employing the versatile MoS 2 nanosheets, the hydrogel exhibited both fast self-healing ability and mechanical/light sensing capability. Therefore, the MoS 2 -based hydrogel provides a two-pronged approach for construction of self-healing flexible electronics.
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高影响因子
CERAMICS INTERNATIONAL
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2020
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IF 3.83
Mengna Feng,Chunting Li,Meng He,Yumin Huang,Juhua Luo
Flexible, high- k and thermostability polymer-based dielectric composites are the core components in electrostatic capacitors and embedded devices. Herein, the dielectric polymer matrix composites are developed by embedding polydopamine (PDA)-encapsulated hydroxylated barium titanate (BTH) and molybdenum disulfide (MoS 2 ) into poly(arylene ether nitrile) (PEN) matrix. The MoS 2 /PDA@BTH-1 particles served as fillers are prepared by polydopamine deposition technology assisted with hydrogen bonding interactions. The introduction of PDA intermediate layer contributes to the construction of multiple interfaces and nanocapacitor networks, enhancing interfacial polarization. Based on this, the resulted dielectric composite with 15 wt% MoS 2 /PDA@BTH-1 loading exhibits the dielectric constant of 17.3 at 1 kHz, higher than that of 4.2 of PEN, while can maintain relatively low dielectric loss simultaneously. The possible mechanisms and synergistic enhancement effect of MoS 2 /PDA@BTH-1 particles on the dielectric properties of composites are also proposed. The results of permittivity-temperature stability show that the dielectric constant of PEN-based dielectric composites is stable when reaches 158 °C, indicating that the film can be used in capacitor at temperatures up to 150 °C, higher than that of most polymer capacitors. All in all, a feasible pathway is provided to design PEN-based dielectric composites with high- k to adopt the high-temperature environment in electrostatic capacitors and embedded devices.
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Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 20
·6900-6905
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IF 7.059
Yishuo Hu,Xiangbin Zeng,Tingting Ren,Yonghong Xiao,Yang Zeng,Wenzhao Wang,Zhenyu Guo,Wen Jin,Shibo Wang,Jichang Lu,Yirong Zeng
Recently, two-dimensional MoS2 has attracted interest for applications in electronics, optics, energy storage, and catalysis. Furthermore, n-type or p-type doping of MoS2 can result in improved film properties, thereby expanding the range of applicability. However, the rapid preparation of large-scale MoS2 films and the effective doping of such films remain challenging. Herein, we report on a one-step growth method called pulsed laser-induced synthesis (PLIS) that can resolve these challenges and can quickly (5–10 min) prepare centimeter-scale MoS2 films directly and selectively on a substrate. A continuous length of up to 1.412 cm can be achieved with MoS2 films prepared by the described methods. Moreover, in situ doping of noble metals (Au, Pt, and Pd) to convert MoS2 into a p-type semiconductor was realized, consistent with the results obtained from first-principles calculations. The STEM images reveal that the phenomena of surface modification and cation substitution occur in the doped MoS2 films. The doped MoS2 films were further processed into a p-type field effect transistor with an on/off ratio of 105. Importantly, this technique can be applied to other transition metal dichalcogenides (TMDCs) while employing various doping elements; this scheme provides an innovative method for upscaling production and large-area doping of TMDC thin films.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Liu Hong,Jingze Li,Fangge Liu,Siyu Huang,Bowen Zheng,Xiaoming Ma,Qiang Zhang,Bingtian Zhao,Cheng Yang
Silver (Ag) has been regarded as a significant antioxidant widely used in biosystem. Nevertheless, the loading level of Ag nanospecies needs to be controlled to prevent their potential risk to human health. Herein, nanocomposite consisting of Ag and molybdenum disulfide (MoS 2 ) has been readily synthesized via a template solvothermal method. Characterized by SEM, TEM and EDX, the Ag@MoS 2 composite morphology including nanoflower , hollow sphere and solid sphere could be well controlled by adjusting solvent type and precursor-template ratio during the synthesis process. The composite structure of all three morphologies was further confirmed by XRD, Raman and N 2 adsorption-desorption measurements. Ag@MoS 2 nanoflower and hollow sphere , in which nanosized Ag was anchored (or encapsulated) within MoS 2 nanosheets, obviously boosted the radical (1,1-diphenyl-2-picyrl, DPPH and nitride oxide, NO) scavenging efficiency (minimum IC 50,DPPH = 26 μg/mL while IC 50,NO = 46 μg/mL) with an Ag dosage much lowered to merely 7∼20 μg/mL. As a contrast, weaker activity of radical scavenging could be observed for Ag@MoS 2 solid sphere . Our work will shed new lights on the cost-effective strategy to obtain a biosafe antioxidant.
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高影响因子
Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Kelin Shen,Yi Cui,Dongao Zhang,Meiying Liu,Hongye Huang,Xuefeng Sha,Fengjie Deng,Naigen Zhou,Xiaoyong Zhang,Yen Wei
In this work, we reported the preparation of MoS 2 -based Fe 3 O 4 magnetic composites (MoS 2 -Fe 3 O 4 MNPs) through the biomimetic strategy, which relied on the self-polymerization of dopamine under alkaline aqueous solution. The utilization of MoS 2 -Fe 3 O 4 MNPs as catalysts for Fenton reaction to degrade organic dyes was also examined in details. A number of experimental parameters, including concentrations of H 2 O 2 , dosages of MoS 2 -Fe 3 O 4 MNPs and pH values on the degradation efficiencies were evaluated. The mechanism for catalytic degradation of methylene blue through Fenton reaction was illustrated by electron spin resonance (ESR) measurement and results indicated that the generation of ·OH and ·O 2 − is the major reason for the degradation reaction. The results from recycle experiments suggest that catalysts possess good reusability. We demonstrated that Fe 3 O 4 MNPs would be well dispersed on the surface of MoS 2 sheets relied on the linkage by polydopamine (PDA), which prevented the aggregation of Fe 3 O 4 MNPs and thus maintained high efficiency. Furthermore, we proved that the catalysts could also have high removal efficiency under low catalyst dosage and H 2 O 2 concentration. In conclusion, we believed the MoS 2 -Fe 3 O 4 MNPs could be successfully fabricated via the biomimetic strategy and should be promising candidates for environmental treatment. The biomimetic method should be also expanded for fabrication of other functional composites owing to the universal adhesion of PDA.
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