Inorganic Chemistry Frontiers
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2017
·Vol. 4
·期 4
·683-691
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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.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Yongbing Lou,Dan He,Zhifei Wang,Yuhang Hu,Ying Shen,Jing Ming,Jinxi Chen
A novel nanocomposite, ultrasmall Co 3 O 4 nanoparticles decorated on ultrathin surface of MoS 2 nanosheets, namely MoS 2 /Co 3 O 4 , was synthesized as an anode material for lithium ion battery. The discharge capacity of MoS 2 /Co 3 O 4 nanocomposite reached 1100.0 mAh g −1 after 50 cycles at 200 mA g −1 , much higher than the pure Co 3 O 4 nanoparticles. Moreover, it could maintain reversible capacity of 946.6 mAh g −1 even after 50 cycles at a high current density of 500 mA g −1 . While increasing the current densities step by step from 100 to 200, 500, and 800 mA g −1 , the capacities of MoS 2 /Co 3 O 4 nanocomposite are 1474.9, 1209.9, 952.6 and 801.9 mAh g −1 , respectively. The excellent electrochemical performance resulted from the designed nanocomposite composed of uniformly distributed ultrasmall Co 3 O 4 nanoparticles and ultrathin MoS 2 nanosheets, which maximally utilized electrochemical active MoS 2 nanosheets and Co 3 O 4 nanoparticles for lithium ion batteries. Moreover, this composite structure may provide more extra spaces for the storage of lithium ions and help to accommodate the volume change through a synergistic interaction between two active materials.
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Journal of Materials Chemistry A
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2016
·Vol. 4
·期 36
·13980-13988
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IF 8.262
Zhibin Fang,Xueyan Huang,Yaozhu Wang,Wenhui Feng,Yan Zhang,Sunxian Weng,Xianzhi Fu,Ping Liu
Defective MoS2 nanosheets have been demonstrated to be a superior catalyst for hydrogen evolution; however, mediocre interfacial contact between the MoS2 cocatalyst and the light harvester still impedes the pursuit of composite photocatalyst systems with highly efficient performance. Herein, we propose a dual-defective assembly methodology following the chemical similarity principle to construct effectively-binding MoS2/In2S3 photocatalysts, in which luxuriant defects on layered In2S3 nanosheets serve as in situ growth sites for defective MoS2 layers with abundant exposed edges. The resulting dual-defective system is endowed with improved separation of electron–hole pairs, beneficial interfacial migration and utilization of electrons, and decreased photocorrosion from holes. By this method, the system achieves dramatically enhanced hydrogen evolution activity as well as considerable stability. The imperfections in both MoS2 and In2S3 are indispensable for desirable performance. The present strategy can not only direct the manufacture of defective MoS2-incorporated photocatalysts but may also contribute to the design of other highly active cocatalyst/light harvester systems with effective interfacial contacts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2014
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IF 2.93
Weijia Han,Chen Zang,Zongyu Huang,Han Zhang,Long Ren,Xiang Qi,Jianxin Zhong
A novel graphene-based three-dimensional (3D) aerogel embedded with two types of functional nanomaterials had been prepared by a facile one-pot hydrothermal process. During the hydrothermal reaction , graphene, TiO 2 nanoparticles and MoS 2 nanosheets were self-assembled into the 3D interconnected networks aerogel, where the uniformly dispersed TiO 2 nanoparticles were densely anchored onto the graphene nanosheets and decorated with the ultrathin MoS 2 nanosheets. The UV–vis DRS and PL spectra measurement shows that the MoS 2 /P25/graphene aerogel exhibits enhanced light absorption and efficient charge separation properties. As a new photocatalyst , the photocatalytic activity was evaluated by photoelectrochemical test and photodegradation methyl orange (MO) under UV irradiation , an improvement of photocurrent was observed, as 6 times higher for MoS 2 /P25/graphene aerogel (37.45 mA/cm 2 ) than pure P25 at +0.6 V, and the fastest photodegradation of MoS 2 /P25/graphene aerogel was found within 15 min. The improved photocatalytic activity is attributed to the porous structure , good electrical conductivity and the maximization of accessible sites of the unique 3D graphene aerogel, the increasing active adsorption sites and photocatalytic reaction centers for the introduction of MoS 2 nanosheets, and the positive synergetic effect between the three components in this hybrid. This work demonstrates that the as-prepared MoS 2 /P25/graphene aerogel may have a great potential application in photoelectrochemical hydrogen production and pollution removal.
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Energy Storage Materials
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2017
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IF 0
Rutao Wang,Shijie Wang,Dongdong Jin,Yabin Zhang,Yaojun Cai,Jianmin Ma,Li Zhang
Two dimensional layered MoS 2 has demonstrated great promise as an ideal alternative to graphite-based anodes for hybrid Li-ion capacitors and Li-ion batteries. Research effort on this material has focused mainly on synthesizing highly nanostructured MoS 2 that allows reducing the dimensions into nanoscale to cross over the sluggish kinetics of Li-ion charge storage. Herein, we engineer the layer structure of MoS 2 to preferentially expand the interlayer distance to increase atomic interface contact/interaction by successfully inserting amorphous carbon layer into adjacent MoS 2 monolayers. This interlayer modified MoS 2 is demonstrated to have the predominantly pseudocapacitive characteristics and can get further gains in Li-ion storage properties through incorporating reduced graphene oxide (RGO). Thus, a novel hybrid Li-ion capacitor is fabricated by employing this MoS 2 -RGO composite as the anode and activated carbon as the cathode, which exhibits an ultrahigh specific energy density of 188 Wh kg -1 at 200 W kg -1 and remains 45.3 Wh kg -1 even at a high specific power density of 40,000 W kg -1 as well as long cycle life. This work shows that engineering interlayer structure and introducing conductive graphene can significantly impact the Li-ion storage properties, enabling new opportunities for designing newly advanced MoS 2 anodes for next-generation energy storage devices.
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JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Qing Fang,Qin Liu,Zongli Xie,Matthew R. Hill,Kaisong Zhang
Solvent-resistant nanofiltration membranes , capable of breaking “trade-off” between permeability and selectivity while resisting physical aging, hold crucial utility in developing advanced membrane materials and reducing energy consumption associated with solvent recovery. Herein, the development of scalable, mixed matrix membranes (MMMs) was presented based on polysulfone (PSf) substrate with ultra-high permeability and aging resistance. The upper selective layer was composed of poly-trimethylsilylpropyne (PTMSP) and two types of nano-fillers, namely poly-dichloroxylene ( p -DCX) and sodium dodecylbenzene sulfonate-molybdenum sulfide (SDBS-MoS 2 ). Under the influence of the additives, the redistribution of the free volume of the polymer as well as the internal spaces within additives creates additional pathways for solvent diffusion, thus increasing solvent permeance. Additionally, the combined effect of the two additives is likely to inhibit filler agglomeration and improve the overall effectiveness of the additives. Compared to pure PTMSP membranes, the p -DCX/SDBS-MoS 2 PTMSP MMMs exhibited enhanced methanol permeance (10.58 vs. 3.14 L m −2 h −1 bar −1 ) and RB rejection (99.23 vs. 96.13 %), which greatly exceeded that of current OSN MMMs. As anticipated, aging of the prepared membranes decelerated with the addition of the additives, and the methanol permeation loss rate decreased from 50.32 % to 13.23 % after 300 h. Molecular dynamics simulations explored by structural analysis revealed the mechanism for the significant improvement in methanol permeance and aging resistance. The membranes obtained were found to be highly industrially applicable, thereby offering the potential to reduce operation costs in energy-intensive separation processes.
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Journal of Bionic Engineering
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2025
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IF 5.8
Teng Xiangyu,Yu Shuxuan,Qiao Zezheng,Ge Zhixing,Yang Wenguang
In recent years, robots used for targeted drug delivery in the stomach have received extensive attention. Inspired by tumbleweeds, we have designed a dual-responsive soft robot based on poly(N‑isopropylacrylamide) and MoS 2 . Under the action of an adjustable magnetic field, it can achieve steady motion at a frequency that allows it to move up to 35 mm/s, demonstrating high flexibility and controllability. It can also roll along a predetermined path, traverse mazes, climb over obstacles, among other functions. In addition, by harnessing the photothermal conversion effect of MoS 2 , the robot can be opened and closed using light, enabling controlled drug release. Targeted drug delivery is achieved in a gastric model using our designed soft robot, marking a significant clinical advancement expected to revolutionize future medical treatments and enhance the efficacy of drug therapy.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Chong Chen,Qiuhao Li,Fengqing Wang,Changjiang Hu,Jun Ma
Precise defect engineering of photocatalysts is highly demanding but remains a challenge. Here, we developed a facile and controllable γ-ray radiation strategy to assemble dual-vacancies confined MoS 2 -CdS-γ nanocomposite photocatalyst. We showed the solvated electron induced homogeneous growth of defects-rich CdS nanoparticles, while the symbiotic • OH radicals etched flower-like 1T/2H MoS 2 substrate surfaces. The optimal MoS 2 -CdS-γ exhibited a H 2 evolution rate of up to 37.80 mmol/h/g under visible light irradiation, which was 36.7 times higher than that of bare CdS-γ, and far superior to those synthesized by hydrothermal method. The microscopic characterizations and theoretical calculations revealed the formation of such unprecedented dual-sulfur-vacancies ensured the tight interfacial contact for fast charge separation. Besides, the existence of 1T-MoS 2 phase further improved the conductivity and strengthened the adsorption interaction with H + intermediate. Therefore, the radiolytic radical chemistry offered a facile, ambient and effective synthetic strategy to improve the catalytic performances of photocatalytic materials.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Chang Xi,Wenxiu Xu,Shaobo Zhou,Yucheng Wang,Sheng Han,Jibo Jiang
The construction of non-uniform interfaces with inert metal-free electroactive materials is essential to achieve rapid kinetics and high ion/electron transfer rates for HER. Herein, an efficient synthesis strategy is employed, which is the construction of single-atom phosphorus-doped MoS 2 nano-arrays on nitrogen-doped graphene oxide aerogel (P–MoS 2 /NGA), providing a good guarantee for rapid charge transfer and the long-term stability by preventing the massive accumulation of P–MoS 2 . Benefiting from this strategy, the optimized catalyst (P–MoS 2 /NGA) with more surface active sites exhibited unexpected hydrogen precipitation reaction (HER) activity. A current density of 10 mV cm -2 was achieved in 1.0 M KOH with a voltage of only 79 mV and a Tafel slope dec -1 of 97 mV. Density Functional Theory (DFT) confirms the formation of strong P 2p-S 2p-Mo 3d hybridization at the Fermi energy level, resulting in deeper d-band centers and more optimized hydrogen adsorption sites. Therefore, P–MoS 2 nanosheets/nitrogen-doped graphene 3D hybrid aerogel has great potential to become excellent electrochemical hydrogen precipitation material.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Haiyan Zhao,Yi Zhou,Shanshan Li,Kemei Shi,Na Li,Min Cui,Cong Zhang
Hydrogen peroxide (H 2 O 2 ) is an important reactive oxygen species, and its abnormal concentration can cause cell distortion and apoptosis, leading to occurrence of various diseases. Therefore, real-time and sensitive monitoring of H 2 O 2 is essential for early disease diagnosis and pathological research. Herein, a novel nanocomposite of Fe-porphyrin covalent organic frameworks decorated with molybdenum disulfide and multi-walled carbon nanotubes (Fe-pCOFs/MoS 2 -MWCNTs), which had glorious enzyme-like activity, was reported for efficient electrochemical detection of H 2 O 2 . The prepared Fe-pCOFs nanosheets with a large specific surface area and fully dispersed Fe 2+ active sites, could enhance mass transfer and atomic utilization, thereby contributing to excellent catalytic efficiency toward H 2 O 2 . The flower-like MoS 2 nanoflakes not only could catalyze the reduction reaction of H 2 O 2 , but also could serve as co-catalyst and form a catalytic cycle with Fe 2+ of Fe-pCOFs, contributing the continuous emergence of catalytic active sites. The highly conductive MWCNTs was employed to promote electron transfer rate. Ultimately, the obtained Fe-pCOFs/MoS 2 -MWCNTs exhibited excellent electrocatalytic activity and conductivity, significantly amplifying the H 2 O 2 response signal. Under the optimal conditions, the sensor had a wide detection range from 20 to 2650 μΜ for H 2 O 2 with a detection limit as low as 2.2 μΜ. Moreover, the sensor successfully recorded trace amounts of H 2 O 2 released from RAW264.7 cells, showing promising application for real-time and sensitive monitoring of H 2 O 2 in clinic or pathological research.
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Surfaces and Interfaces
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2024
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IF 5.7
Cijun Shuai,Gao Pan,Qi Zhong,Shuping Peng
Bacterial infections considerably limit the success of scaffold transplantation. CuO 2 may generate hydroxyl radicals through a self-cascade catalytic process, which is effective for sterilization. However, reducing CuO 2 -derived Cu + ions to Cu° can lead to a decline in catalytic activity. To overcome these limitations, we anchored CuO 2 onto MoS 2 to establish stable Cu-S-Mo interfacial sites. The CuO 2 /MoS 2 nanozyme was fabricated using a low-temperature co-precipitation technique and introduced into poly- l -lactic acid scaffolds using selective laser sintering. The Cu-S-Mo interfacial sites showed a triad of functions that synergistically enhanced catalytic performance. These sites stabilized the Cu atoms, augmented catalytic activity by facilitating efficient electron transfer through the Mo 4+ /Mo 6+ redox couple, and improved the conduction of heat derived from the photothermal response of MoS 2 to the Cu catalyst. The synergistic action of chemodynamic and photothermal therapy, mediated by the Cu-S-Mo sites, resulted in remarkable antibacterial efficacy, with 92.3 % and 93.5 % inhibition rates against Staphylococcus aureus and Escherichia coli , respectively. Experimental evidence and simulations demonstrated that Cu-S-Mo structure stabilized the Cu atoms and improved electron transfer via interatomic charge transfer. These results highlight the potential of the CuO 2 @MoS 2 /PLLA scaffold in eliminating bacterial infections.
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高影响因子
TRIBOLOGY INTERNATIONAL
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2025
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IF 6.9
Xibo Shao,Yi Ren,Kun Guo,Chengfeng Du,Xianzong Wang,Jiao Chen,Jianxi Liu,Long Wang,Jun Yang
Molybdenum disulfide (MoS 2 ) is an excellent lubricant used in aerospace. Its ability to lubricate and resist wear at temperatures above 400 °C remains a significant challenge, due to its high temperature oxidation. Herein, we demonstrate that excellent high-temperature lubrication can be achieved with coefficient of friction (COF) of 0.21–0.26 at 450–800 ℃ by compounding bismuth oxide (Bi 2 O 3 ) nanoparticles with MoS 2 . The improvement of tribological properties above 450 ℃ was due to the synergistic lubrication of MoS 2 and Bi 2 O 3 . When the temperature was higher than 600 ℃, the tribo-chemical reaction driven by continuous stress and temperature, induced the formation of new ternary oxides (Bi 2 MoO 6 and Bi 2 Mo 3 O 12 ) with low shearing nano-grain structure, and a continuous dense lubricating glaze layer composed of Bi 2 O 3 , MoO 3 , Bi 2 MoO 6 and Bi 2 Mo 3 O 12 was formed at the friction interface. In Bi 2 MoO 6 layered structure, the distortion of MoO 6 octahedral structure led to the increase of interlayer distance, which weakened the coupling effect between ions, thus contributing to low shear strength and good lubricity. Our research indicates that the formation of low shear strength Bi 2 MoO 6 ternary oxide is helpful to the realization of high temperature lubrication, which provides a strategy to expand the high temperature lubrication range of MoS 2 -based solid lubricant.
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