JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Fajun Li,Yuqi Ma,Rui Xu,Jingyang Chen,Shujin Kan,Guizhi Wang,Haifeng Xu,Zhong Jin
Low-cost, highly active, and robust electrocatalysts are needed for more efficient H 2 production from water splitting, herein, we present an amorphous MoS 2 -Ni 3 S 2 heterostructure on the nickel foam (NF) substrate via a facile hydrothermal treatment and a one-step electrodeposition approach. The S 2 2 - sites in the fabricated electrocatalyst could be conveniently modulated by synthesis conditions. The optimized amorphous MoS 2 -Ni 3 S 2 @NF-24 shows an excellent electrocatalytic activity for HER with the overpotential of 58 mV at 10 mA cm −2 and stabilizes for over 50 h when used as a bifunctional catalyst for overall water splitting in 1 M KOH electrolyte at room temperature. Experimental characterizations and DFT calculations demonstrate that the excellent electrocatalytic performance of the fabricated heterostructure could be attributed to the synergistic effect of the proper hydrogen binding free energies of MoS 2 with abundant bridging S 2 2 - and the strong adsorption of OH − to the Ni 3 S 2 . This work proposed a finely designed MoS 2 -based hybrid catalyst for efficient alkaline HER, thus providing insights into the design and fabrication of inexpensive electrocatalysts for wide range of applications.
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高影响因子
iScience
·
2024
·
IF 4.6
Shuangjie Liu,Xinyu Sun,Yang Wang,Kaijin Liu,Renpeng Liu,Yuqin Zhang,Zhaoliang Ni,Wanyu Tang,Shaofang Zhang,Xiaoyu Mu,Hao Wang,Xiao-Dong Zhang,Dong Ming
Implantable neural electrodes are crucial in neurological diagnosis and therapy because of their ultra-high spatial resolution, but they are constrained by high impedance and insufficient charge injection capacity, resulting in noise that often obscures valuable signals. Emerging nanotechnologies are powerful tools to improve sensitivity and biocompatibility. Herein, we developed quantized 2D MoS 2 electrodes by incorporating bioactive MoS 2 nanosheets onto bare electrodes, achieving sensitive, compatible recording. The 2D materials can create tiny nanowells, which behaved as quantized charge storage units and thus improved sensitivity. The key sensitivity indicators, impedance and cathode charge storage capacity, showed a multifold increase. The 17.7-fold improvement in catalytic activity of MoS 2 electrodes facilitated effective current transmission and reduced inflammatory response. In vivo recording showed that the sensitivity of local field potentials increased throughout frequency range and peaked at a 4.7-fold in β rhythm. This work provides a general strategy for achieving effective diagnoses of neurological disorders.
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DOI
PubMed
高影响因子
Nanoscale
·
2024
·
IF 5.8
Xiaoyan Xue,Meili Guo,Hao Zhang,Qingshan Liu,Xuyan Li,Xin Sun,Xiaoyu Mu,Xiao-Dong Zhang
Earth-abundant MoS2 with the advantages of a stable structure, tunable bandgap, and easy shear has great potential for applications in the fields of catalysis, biomedicine, and so on. However, the biocatalytic activity of MoS2 remains little investigated and is insufficient for biomedical applications. In this work, we develop ultra-small and water-soluble MoS2 clusters with superior antioxidant activity and enzyme-like activity via valence-engineering modulation with Ce doping. Compared with pure, Re-, Tl-, and Nd-MoS2 clusters, Ce-MoS2 clusters exhibit about 1.7-fold enhanced antioxidant activity. Moreover, superoxide dismutase (SOD)-like activity of Ce-MoS2 clusters is about 30-fold higher than that of MoS2 clusters. In addition, the Ce-MoS2 clusters are evidenced to possess ultra-high clearance performance for reactive oxygen species and reactive nitrogen radicals (RONS), especially ˙OH and O2˙−. The comprehensive analyses of valence evolution and the energy level structure indicate that the enhanced biocatalytic activity is attributed to the synergistic effect of valence engineering of Mo4+/Mo6+ and energy-level engineering in MoS2 clusters via Ce doping. This work provides a universal approach to improve the biocatalytic activity of MoS2 clusters via valence engineering modulation, which exhibits great potential in the field of biomedical application, especially inflammatory diseases.
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PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Jiao Liu,Xukang Han,Wenjuan Ren,Longqiang Liang,Xiyao Wang,Di Lan,Mingliang Ma,Shengtao Gao
The rapid development of electronic communication and radar technologies in the 5G era has exacerbated electromagnetic pollution, thereby driving the urgent need for cutting-edge microwave absorption materials. In this study, a novel SnCo/C@MoS2 composite was proposed, and the core-shell structure was synthesized via electrospinning and hydrothermal methods. This composite uniquely integrated the high conductivity and magnetic properties of Sn and Co while capitalizing on the superior dielectric performance of MoS2 nanosheets, which are uniformly grown on carbon nanofibers. This design capitalized on the synergistic effects of a one-dimensional (1D) carbon fibers (CF) framework and two-dimensional (2D) MoS2 nanostructures, enhancing interfacial polarization and multi-loss mechanisms. The SnCo/C@MoS2 exhibited remarkable microwave absorption properties, achieving a minimum reflection loss (RLmin) of -64.27 dB at a thickness of 1.52 mm and an effective absorption bandwidth (EAB) of 5.20 GHz. Moreover, computer simulation technology (CST) demonstrated that SnCo/CNF@MoS2 simulated radar cross-section (RCS) values felled below -20 dB m2. These results demonstrated a substantial improvement in absorption performance compared to the individual SnCo/CNF and MoS2 components. This work underscored the effectiveness of combining 1D and 2D materials to obtain core-shell structures for superior electromagnetic wave (EMW) attenuation.
研究领域:
材料科学
·
电磁学
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PubMed
高影响因子
ACS Nano
·
2018
·
IF 13.709
Yu-Lin Bai,Yu-Si Liu,Chao Ma,Kai-Xue Wang,Jie-Sheng Chen
Sodium-ion batteries (SIBs) are generally considered as promising cheap alternatives of lithium-ion batteries for stationary renewable energy storage and have received increasing attention in recent years. The exploration of anode materials with efficient electron transportation is essential for improving the performance of SIBs. Inspired by the signal transfer mode of a neuron, we designed a composite by stringing MoS2 nanoflower (soma) with multiwall carbon nanotubes (MWCNTs) (axons). High-resolution TEM observation reveals a lattice matching growth mechanism of MoS2 nanosheets on the interface of MWCNTs and the lattice expansion of the (002) plane of MoS2. The lattice matching among the MoS2 nanosheet and MWCNT could facilitate electron transfer and structure maintenance upon cycling. The expanded distance of the (002) plane of MoS2 would also promote the sodium-ion intercalation/deintercalation kinetics of the composite. Benefiting from the structural features, when used as an anode material for SIBs, the composite exhibits excellent electrochemical performance, including high specific capacity, excellent cycle stability, and superior rate capabilities. A stable capacity of 527.7 mAh g–1 can be achieved after 110 cycles at a current density of 100 mA g–1. The neuron-inspired design proposed is a promising and efficient strategy for the development of electrode materials for SIBs with high mass transport kinetics and structural stability.
研究领域:
材料科学
·
电化学
·
纳米技术
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
·
IF 9.965
Abdou Karim Darboe,Xiaosi Qi,Xiu Gong,Qiong Peng,Yanli Chen,Ren Xie,Wei Zhong,Guanglei Wu
Interfacial polarization and geometrical morphology play a significant role in the attenuation of electromagnetic (EM) wave. Herein, the two-dimensional (2D)/2D heterojunction with flower-like geometrical morphology is proposed and produced, which may simultaneously provide a large contact area for achieving strong interfacial polarization and activates more sites for the possible multiple EM wave reflection and scattering. By adopting a simple two-step hydrothermal method, MoSe 2 /MoS 2 and MoS 2 /MoSe 2 inner and outer-interchangeable heterojunctions consisting of 2D MoSe 2 and MoS 2 nanosheets with flower-like geometrical morphology were successfully synthesized. The results revealed that the hydrothermal temperatures significantly impacted the flower-like geometrical morphology and MoS 2 content. By optimizing the microstructures, the designed MoSe 2 /MoS 2 and MoS 2 /MoSe 2 heterojunctions presented enhanced comprehensive EM wave absorption properties (EMWAPs), possessing strong absorption capability, wide absorption bandwidth and thin matching thicknesses. Generally, this work demonstrates that the optimized EMWAPs of designed heterojunctions mainly originate from the special interfaces and morphology configuration, which also paves a new way for the designing and synthesis of transition metal dichalcogenides-based heterojunction as a novel and desirable candidate for high-performance microwave absorbers.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 14
·9157-9164
·
IF 12.732
Zhiwei Chen,Yang Li,Lin Wang,Yuyu Bu,Jin-Ping Ao
In this paper, a MoS2/Rh–P bi-compound heterogeneous cocatalyst is developed to improve the photoelectrochemical (PEC) water splitting performance of a p-Si photocathode. Compared with the single cocatalysts (MoS2 and Rh–P), the bi-compound heterogeneous cocatalyst MoS2/Rh–P on the p-Si photocathode surface exhibits a much better hydrogen evolution reaction (HER) activity at the electrode/electrolyte interface, which is attributed to the synergistic electronic effect between MoS2 and Rh–P materials. Meanwhile, the TiO2 layer could serve as a linker between p-Si and the surface cocatalyst to optimize the interface energy, further promoting the photocarrier transfer process within the system. Thus, the as-prepared p-Si–TiO2–MoS2/Rh–P photocathode exhibits excellent PEC performance with a high photocurrent density of −24.1 mA cm−2 at 0 V (vs. RHE) and a positive onset potential of 0.43 V (vs. RHE). And the bi-compound heterogeneous cocatalyst provides a feasible strategy for boosting the PEC hydrogen evolution.
研究领域:
材料科学
·
能源转换与存储
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Yafu Tang,Yuechao Yang,Dongdong Cheng,Bin Gao,Yongshan Wan,Yuncong C. Li,Yuanyuan Yao,Jiazhuo Xie,Lu Liu
To improve fertilizer use efficiency, reduce irrigation requirement, and minimize negative environmental impact, a novel large-grained-activated-lignite-slow-release fertilizer (LAF) with good water retention was developed by mechanical extrusion of activated lignite and conventional fertilizer. A 3D molybdate-sulfur hierarchical hollow nanosphere (3D-MoS2–HN) catalyst was successfully fabricated via a simple route, and the lignite was activated by 3D-MoS2–HN to increase its water-soluble humic acid content and nutrient adsorption ability. After activation, the amounts of small molecular active groups and water-soluble humic acid of activated lignite were significantly higher than those of raw lignite. The activation also increased adsorption ability of the activated lignite for nutrients. LAF prepared from the activated lignite had a preferable slow-release property and good water-holding capacity in soil. Moreover, a pot trial further demonstrated that LAF effectively improved the growth of an apple plant. With outstanding water-retention and slow-release capacities, this new fertilizer is economical and eco-friendly, and thus is promising in field applications.
研究领域:
农业科学
·
环境科学
·
材料科学
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高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2021
·Vol. 54
·期 40
·405101
·
IF 3.207
Wei-song Liu,Hui Yang,Lan Li
The heterostructure device based on polyvinylidene fluoride (PVDF)/MoS2 films was succesfully prepared and showed a good hysteresis feature with a unique resistive switching perpromance, where the logarithmic I–V curve looks like a butterfly. The on-off ratio for the resistive switching in the device based on PVDF/MoS2 films reaches 2.5 × 102 and the resistive switching happens at −0.9 V and −4.9 V for a half loop. The influence of the introduction of MoS2 and ferroelectric PVDF film was also studied and compared to a device based on a single film. The underlying physical mechanism for the unique resistive transition was attributed to the polarization field from the ferroelectric polymer PVDF and the S vacancies in MoS2.
研究领域:
材料科学
·
电子工程
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高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Danke Chen,Wen Ying,Yi Guo,Yulong Ying,Xinsheng Peng
Two-dimensional (2D) materials-based membranes show great potential for gas separation. Herein an ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4]), was confined in the 2D channels of MoS2-laminated membranes via an infiltration process. Compared with the corresponding bulk [BMIM][BF4], nanoconfined [BMIM][BF4] shows an obvious incremental increase in freezing point and a shift of vibration bands. The resulting MoS2-supported ionic liquid membrane (MoS2 SILM) exhibits excellent CO2 separation performance with high CO2 permeance (47.88 GPU) and superb selectivity for CO2/N2 (131.42), CO2/CH4 (43.52), and CO2/H2 (14.95), which is much better than that of neat [BMIM][BF4] and [BMIM][BF4]-based membranes. The outstanding performance of MoS2 SILMs is attributed to the nanoconfined [BMIM][BF4], which enables fast transport of CO2. Long-term operation also reveals the durability and stability of the prepared MoS2 SILMs. The method of confining ILs in the 2D nanochannels of 2D materials may pave a new way for CO2 capture and separation.
研究领域:
材料科学
·
化学工程
·
环境科学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mingyue Kang,Xuejing Shen,Hongyu Fan,Zhanjun Wu,Tao Sun
With the promotion of electric vehicles and electronic products, the development of high-capacity, fast-charging, and cost-effective rechargeable batteries has become extremely urgent. Aluminum-ion batteries (AIBs) have become a promising system due to their high aluminum reserves, high theoretical specific capacity, and high safety. However, their actual capacity is far lower than the real capacity due to the limitation of cathode. Here, we report a construction strategy of reduced graphene oxide-intercalated MoS 2 nanoflowers cathode via a hydrothermal method . It promoted the transition of MoS 2 crystal phase from 2H to 1T, and the expansion of interlayer spacing from 0.62 nm to 1.03 nm, overcoming the shortcomings of slow electrochemical reaction kinetics and low capacity caused by the outstanding semiconductor properties of 2H MoS 2 and the compact interlayers. The obtained batteries reached capacity up to 143 mAh g −1 , high Coulombic efficiency up to 96.9% at 1 A g −1 . The batteries retained 95.6% of the original capacity after 1000 cycles. Notably, it retains 75 mAh g −1 at ultrahigh current densities of 10 A g −1 over 10,000 cycles. Our methodology opens up an exciting way to design cathode architecture for next-generation AIBs. It also provides a new perspective for the design and preparation of other battery systems.
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高影响因子
Nano Research
·
2020
·Vol. 13
·期 11
·2933-2938
·
IF 8.183
Gao Xiang,Xiong Liukang,Wu Jiabin,Wan Jun,Huang Liang
Two-dimensional molybdenum disulfide (2D MoS 2 ) is considered as a promising candidate for many applications due to its unique structure and properties. However, the controllable synthesis of large-scale and high-quality 2D 1T-phase MoS 2 is still a challenge. Herein, we present the scalable and controllable synthesis of 2D MoS 2 from 2H to 1T@2H phase by using K 2 SO 4 salt as a simultaneous high-temperature sulfur source and template. The as-synthesized 1T@2H-2D MoS 2 exhibits a high yield and can be easily assembled into freestanding electrode with high specific capacitance of 434 F/g at a scan rate of 1 mV/s in LiClO 4 ethylene carbonate/dimethyl carbonate (EC/DMC). Moreover, various single-crystal 2D transition metal sulfides (WS 2 , PbS, MnS and Ni 9 S 8 ) and 2D S-doped carbon can be synthesized using this method. We believe that this study may provide a new sight for scalable and controllable synthesis of other 2D materials beyond 2D MoS 2 .
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
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