Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 42
·22786-22796
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IF 11.9
Zhao Wang,Zongwei Guo,Jiajun Luo,Xuesong Wang,Ming Li,Yuhui Ao,Lin Jin
The capacitance, conductivity, and ion migration ability of electrode materials are key factors affecting the energy density of supercapacitors (SCs). The synergistic application of porous carbon and two-dimensional (2D) materials can solve these problems. In this study, we successfully constructed porous B, N co-doped carbon (BNC) scaffolds on the surface of carbon cloth (CC), and vertically ordered 1T-2H MoS2 (1T-2H MS) nanosheets with large interlayer spacing were then assembled on their surfaces, providing highly distributed active sites and large specific surface areas, and rapid charge transfer capability for high-capacity electrode materials. Refined structural characterization and density functional theory (DFT) calculations indicated that 1T-2H MS@BNC/CC heterostructures have reasonable structural/phase design advantages, with a conversion rate of up to 77%. Benefiting from the structure and metal phase advantages, the 1T-2H MS@BNC/CC electrode exhibited a good electrochemical storage mechanism under alkaline conditions, with an ultrahigh-performance of 994.3 F g−1 at a current density of 0.5 A g−1, and cycling stability was maintained at 80% even after 6000 cycles. Furthermore, the resulting 1T-2H MS@BNC/CC//AC/CC asymmetrically flexible, all-solid-state supercapacitors (FASCs) achieved a dramatically high energy density of 92.3 Wh kg−1 at 349.7 W kg−1 and remarkable cycling lifespan (∼91% retention over 1000 cycles). Surprisingly, a single FASC could successfully activate the electronic clock for 15 minutes, and two FASCs in a series could light up the LED for 10 minutes. The outstanding FASCs exhibited perfect structural and durable stability upon bending, indicating their superiority in flexible energy storage devices.
研究领域:
材料科学
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能源存储
·
纳米技术
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·125377
·
IF 7.5
Xin Sun,Ziyi Zhu,Wei Yan,Yuanping Chen,Yingcong Wei,Jing Xu
Synergistic strain/phase engineering boosts photocatalytic hydrogen evolution performance. • The CdS-O/MS-5 achieves a high hydrogen evolution rate of 68.71 mmol·g −1 ·h −1 and AQE of 48.49%. • Strain-enhanced charge transfer couples with metallic/semiconducting phase junctions. While high-efficiency photocatalytic water splitting is pivotal for a sustainable hydrogen economy, its widespread implementation is hindered by sluggish charge-carrier kinetics and the formidable overpotentials inherent to traditional semiconductor. Here, we report a dual-optimization strategy to transcend these limitations by integrating oxygen-doped CdS (O-CdS) with a 1 T/2H-MoS 2 phase-engineered co-catalyst. The interstitial incorporation of oxygen induces a pronounced lattice expansion within the CdS framework, which reconfigures the electronic band structure by introducing additional electronic states near the Fermi level. These emergent states act as energetic stepping stones, facilitating efficient charge injection into the co-catalyst. Concurrently, the rational design of the 1 T/2H-MoS 2 metallic/semiconducting homojunction facilitates efficient interfacial charge extraction and provides abundant active sites for proton reduction. This synergistic integration of lattice-strain engineering and phase-controlled co-catalytic architectures simultaneously elevates photocatalytic activity and long-term durability. The optimized system exhibits a 2.5-fold enhancement in hydrogen evolution performance (68.71 mmol g −1 h −1 ) over the pristine CdS. Our findings establish a robust paradigm for leveraging lattice distortion and polymorphic phase engineering to optimize solar-to-chemical energy conversion in hybrid semiconductor architectures.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2025
·
IF 6
Hengyang Liu,Wanyuan Li,Yong Xu,Enzhu Hu,Guangchao Qin,Kunhong Hu
A 1 T/2H-MoS 2 (THM) lubricant additive was synthesized via a solvothermal method to improve the lubrication of poly-alpha-olefin (PAO) and reduce the negative influence of diesel carbon soot (CS). The THM was then modified with Cu to further enhance the wear resistance. The average interlayer spacing of MoS 2 in THM and the Cu-modified THM (CTHM) was 0.99 nm, significantly larger than the 0.63 nm of 2H-MoS 2 nanoparticles. In PAO, CTHM demonstrated a 45 % improvement in friction reduction and a 77 % increase in wear resistance compared to 2H-MoS 2 . While the friction reduction of CTHM was similar to that of THM, CTHM exhibited 36 % superior wear resistance. In CS-contaminated PAO, CTHM outperformed 2H-MoS 2 with a 37 % reduction in friction and a 29 % enhancement in wear resistance. The Cu modification reduced the oxidation of CTHM and the conversion of 1 T-MoS 2 to 2H-MoS 2 in the tribofilm, contributing to improved wear resistance. The CS contamination negatively influenced the lubrication by accelerating MoS 2 oxidation, catalyzing the transition from 1 T-MoS 2 to 2H-MoS 2 , and inhibiting Cu incorporation into the tribofilm. Nonetheless, the effect of CS on CTHM and THM was less severe than on 2H-MoS 2 . This work provides an alternative method to alleviated the antagonism between MoS 2 and CS.
研究领域:
材料科学
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润滑工程
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DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Bingjie Wen,Nizao Kong,Min Huang,Liqin Fu,Dingbang Yan,Yexin Tian,Jinshui Liu,Ruixuan Tan,Fei Han
Despite the outstanding theoretical capacities of two-dimensional (2D) molybdenum sulfide (MoS2) with low costs, its low conductivity and easy agglomeration greatly impede the business application as anode materials. The heterostructures between 2D MoS2 and Ti3C2 MXene are able to combine the collective superiorities of MoS2 and Ti3C2, thus greatly ameliorating the electrical conductivity and rate capacity through synergistic effects. Herein, we design a simple intercalation–sulfidation strategy for the construction of the TH MoS2/Ti3C2 heterostructures with a compact stacking lamellar structure and investigate the electrochemical sodium storage properties of the composite. In the architecture, fallen leaf-like MoS2 nanosheets with a mixed-phase crystal containing 1T and 2H phases grow tightly on the surface and interlayer of Ti3C2 matrixes. The expanded layer spacing of Ti3C2 as a result of MoS2 insertion can greatly accelerate electronic/sodium ion transport. Meanwhile, 2D Ti3C2 can serve as a strong mechanical support for the composite electrode to provide a buffer space for volume expansion and avoid structural collapse during cycles. Benefiting from these structural advantages, the TH MoS2/Ti3C2 anode reveals higher sodium storage capacity of 743.6 mAh g–1 than bare MoS2 (579.4 mAh g–1) at 0.2 A g–1. Furthermore, the anode exhibits significantly improved battery rate performance with a high sodium storage capacity of 653.3, 539.1, 512.1, 488.7, 439.3, and 586.7 mAh g–1 at 0.2, 0.5, 1, 2, 5, and 0.2 A g–1. Our study provides a unique synthesis route to construct layered heterostructure composites by artificial stacking of different types of 2D materials, which are considered as highly promising electrode materials for sodium-ion batteries (SIBs).
研究领域:
材料科学
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电化学
·
纳米材料
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能源存储
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无机化学
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固态物理
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Rui Li,Shuoyang Liang,Aikelaimu Aihemaiti,Shun Li,Zuotai Zhang
Piezocatalysis technology is emerging as a promising strategy for removing organic pollutants from water by harvesting mechanical energy from the surrounding environment. Herein, 2H-MoS 2 flower-like nanosheets with tunable S vacancies was synthesized via a hydrothermal method by adjusting pH of the precursor solution, Mo and S molar ratio, reaction time and temperature. The results showed that the presence of S vacancy leads to significantly enhanced piezoelectric response in the MoS 2 nanosheets, as confirmed by both theoretical calculation using first-principle based density functional theory and probe force microscopy (PFM) measurements. As a result, the as-obtained MoS 2 nanoflower piezocatalyst exhibited excellent degradation efficiency for Orange Ⅱ solution (removal rate > 95 % in 1 h) under ultrasonic vibration (40 kHz and 110 W). Importantly, we demonstrated for the first time that the piezocatalytic performance was tightly related with the water level in ultrasonic cleaner. The present work not only reports a simple and effective strategy for improving the piezocatalytic degradation activity of MoS 2 by introducing vacancy, but also provides new insights and deeper understanding on the underlying mechanism.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Jingfan Zhang,Min Zhao,Yubo Zhao,Jingkun Wang,Yanxia Wu,Kexun Li,Ying Liu
Molybdenum disulfide (MoS 2 ) has been considered as an excellent candidate for microwave absorption applications due to its appropriate electrical conductivity and large area size. However, the absorption efficiency and absorption bandwidth of single-phase MoS 2 nanocomposites have been limited due to the weak electrical conductivity and magnetism . This paper proposes a feasible strategy to optimize the electromagnetic properties of MoS 2 absorbent by Fe-doping. The MoS 2 nanosheets with different Fe concentration have been synthesized a microwave-assisted hydrothermal process. Microstructure characterizations reveal that Fe dopants can facilitate the formation mixed 1T/2H phase MoS 2 nanosheets. Owing to the improved permittivity and permeability properties, impedance matching, as well as attenuation characteristics originated from the doping effect and partial phase transformation, the Fe-doped 1T/2H-MoS 2 nanosheets exhibit excellent electromagnetic wave absorbing properties. Its maximum reflection loss reaches − 60.03 dB at the matching thickness of 5.65 mm, and the effective absorption bandwidth below − 10 dB is 5.33 GHz. Such novel doping strategy provides a new insight for design and controlling the magneto-dielectric properties of MoS 2 nanostructures .
研究领域:
材料科学
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电磁学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Caicai Zhang,Ao Xu,Shuting Mao,Zhenping Li,Jiawen Yan,Fuyi Jiang,Yijing Wang,Kaiyuan Zhang,Yanli Zhou
Two-dimensional layered-structure MoS 2 has been explored as the promising cathode materials for magnesium ion batteries benefited by its wide layer distance and satisfactory capacity. However, such strong interaction between Mg 2+ and MoS 2 brings about the sluggish diffusion kinetics and irreversible electrochemical reaction, leading to a decreased specific capacity and poor rate capability. How to adopt its structure engineering and interface engineering to boost the Mg 2+ diffusion kinetics and enhance the electrochemical reversibility of MoS 2 is still a huge challenge. Herein, the amorphous sulfur-rich 1T/2H-MoS 2 mesoporous nanospheres (a-MoS 2+x , 0
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
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2020
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IF 7.888
Xiaorong Gan,Huimin Zhao,Dangyuan Lei,Peifang Wang
Liquid phase exfoliation (LPE) is a promising method for synthesizing two-dimensional (2D) 2H-MoS 2 due to the balance obtained in the resulting yield and quality. Improvements in the electrocatalytic activity of 2D 2H-MoS 2 are typically attributed to an increased number of active sites at the plane edges. However, the conclusion need be carefully redefined in the case of LPE, because the covalent surface modification and solvent intercalation between layers can affect the electrocatalytic activity as well. In this study, bulk 2H-MoS 2 was exfoliated in three typical solvents, including N, N-dimethyl formamide (DMF), formamide, and 1-methyl-2-pyrrolidinone (NMP), to synthesize 2H-MoS 2 nanosheets . X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectrum were used to confirm the possibility of surface and interface functionalization of the 2H-MoS 2 nanosheets. Further, the effects on the electrocatalytic activity of 2H-MoS 2 nanosheets were investigated mainly by density functional theory periodic calculations based on the analysis of electronic energy band structures. The results have demonstrated that 2H-MoS 2 nanosheets prepared in formamide exhibit smaller average size and thickness, and higher electrocatalytic activity. The surface functionalization of the 2H-MoS 2 nanosheets is indeed generated by Mo-N covalent bonds due to the presence of S vacancies. Such covalent functionalization leads to a slight decrease of energy band gap with 0.03 eV in a (3 × 3 × 1) 2H-MoS 2 supercell. In contrast, the interface functionalization formed by the intercalation of solvent molecules (e.g., formamide) between layers can cause a remarkable decrease in the band gap of (1 × 1 × 2) 2H-MoS 2 , the phase transition from semiconductor to semimetal , higher carrier mobility, and smaller effective mass ( m e = 0.052 m 0 ).
研究领域:
材料科学
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电化学
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DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2021
·
IF 5.876
Fan Nie,Wenyue Xu,Di Zhang,Baizhi Jiang,Qi Sun,Junwei Wang
The N-doped two-dimensional (2D) carbon-based catalysts play a crucial role in the PMS catalytic activity of advanced oxidation processes (AOPs). However, their activation mechanism still lacks a reasonable explanation. A low-cost and one-step synthesis of N-doped graphite-2H nanoplatelets (N-GNPs) were prepared through the calcination under 600°C. N-GNPs 0.5 -600 was applied to activate permonosulfate (PMS) 19.4 times faster than that of pure PMS system under visible light to degrade bis(monochloro-s-triazine) reactive dye. We first demonstrate that electron arrangement in N-GNPs samples can effectively activate PMS and generate 1 O 2 as much as S O 4 · − and HO · as the main reactive species. The EPR test results were consistent with the quenching test. Density functional theory (DFT) calculations showed the graphite N adjacent C atoms (Eb= -8.9 eV) were promoted to produce more active sites. Bidirectional regulation of graphite N bonded C atoms form a local electron state, making the C most active electron donation. The 2P Z orbital of carbon atoms becomes occupied with the free electrons. The localized orbitals lead to the stronger Columbic repulsion of π electrons and enlarged interlayer distance, making it easier for the electrons to give out and accelerate the free-radical process.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Dan Yang,Chen Xin,Wenzhan Zhang,Yitao Lou,Zhongchao Bai,Ting Xiong
In-situ 1 T/2H MoS 2 heterointerfaces synergistically combine 2H light-harvesting with 1 T conductivity for enhanced charge separation. • Optimized MoS 2 features expanded interlayer spacing and abundant active sites, accelerating Zn 2+ diffusion and redox kinetics. • The PRZIB delivers 340 mAh g −1 under illumination (vs. 237 mAh g −1 in dark) and achieves 1.2% photoconversion efficiency. • Photo-recharging couples Zn 2+ extraction with photoelectron-driven Zn deposition, while flexible devices demonstrate stable power output for LEDs. Photo-rechargeable Zn-ion batteries (PRZIBs) are constrained by photocathodes lacking efficient light harvesting, fast transport, and reversible Zn 2+ storage. Herein, we develop a temperature-controlled hydrothermal strategy to construct in-situ 1 T/2H MoS 2 photocathodes with tunable interlayer spacing and defect density. The optimized sample synthesized at 140 °C exhibits enlarged interlayer spacing, abundant active sites and an intimate 1 T/2H phase interface, which accelerate Zn 2+ diffusion and redox kinetics. Moreover, the semiconducting 2H domains absorb light while metallic 1 T domains extract photogenerated electrons, enabling synergistic charge separation. Consequently, the PRZIB achieves a photoconversion efficiency of 1.2% and a discharge capacity of 340 mAh g −1 under illumination, versus 237 mAh g −1 in the dark at 0.1 A g −1 . Mechanistically, quasi-in-situ XRD reveals that photo-recharging couples Zn 2+ extraction with photoelectron-driven Zn deposition, while discharge reverses via intercalation/stripping, as confirmed by reversible (002) reflections. Additionally, flexible devices demonstrate stable power output, driving a biomimetic bird and an LED. Overall, this work highlights heterophase junction engineering as a promising route for integrated photo-rechargeable systems.
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高影响因子
MOLECULES
·
2017
·Vol. 22
·期 7
·1068
·
IF 2.861
Yalu Dong,Panpan Peng,Baoping Hu,Hui Su,Shenghua Li,Siping Pang
High-energy metal–organic frameworks (MOFs) based on nitrogen-rich ligands are an emerging class of explosives, and density is one of the positive factors that can influence the performance of energetic materials. Thus, it is important to design and synthesize high-density energetic MOFs. In the present work, hydrothermal reactions of Cu(II) with the rigid polynitro heterocyclic ligands 5,5′-dinitro-2H,2′H-3,3′-bi-1,2,4-triazole (DNBT) and 5,5′-dinitro-3,3′-bis-1,2,4-triazole-1-diol (DNBTO) gave two high-density MOFs: [Cu(DNBT)(ATRZ)3]n(1) and [Cu(DNBTO)(ATRZ)2(H2O)2]n(2), where ATRZ represents 4,4′-azo-1,2,4-triazole. The structures were characterized by infrared spectroscopy, elemental analysis, ultraviolet-visible (UV) absorption spectroscopy and single-crystal X-ray diffraction. Their thermal stabilities were also determined by thermogravimetric/differential scanning calorimetry analysis (TG/DSC). The results revealed that complex1has a two-dimensional porous framework that possesses the most stable chair conformations (like cyclohexane), whereas complex2has a one-dimensional polymeric structure. Compared with previously reported MOFs based on copper ions, the complexes have higher density (ρ = 1.93 g cm−3for complex1and ρ = 1.96 g cm−3for complex2) and high thermal stability (decomposition temperatures of 323 °C for complex1and 333.3 °C for complex2), especially because of the introduction of an N–O bond in complex2. We anticipate that these two complexes would be potential high-energy density materials.Keywords:energetic materials;metal organic frameworks;densities;polynitro heterocyclic ligands
研究领域:
材料科学
·
化学
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DOI
PubMed
高影响因子
MOLECULES
·
2021
·Vol. 26
·期 19
·5740
·
IF 4.412
Kai Zhang,Yanchao Liu,Sheng Cui,Yimin Xie
To elucidate the chemical linkages between lignin and carbohydrates in ginkgo cell walls,13C-2H-enriched cell wall-dehydrogenation polymers (CW-DHP) were selectively prepared with cambial tissue fromGinkgo bilobaL. by feeding D-glucose-[6-2H2], coniferin-[α-13C], and phenylalanine ammonia-lyase (PAL) inhibitor. The abundant detection of13C and2H confirmed that D-glucose-[6-2H2] and coniferin-[α-13C] were involved in the normal metabolism of ginkgo cambial cells that had been effectively labelled with dual isotopes. In the ginkgo CW-DHP, ketal and ether linkages were formed between the C-α of lignin side chains and carbohydrates, as revealed by solid state CP/MAS13C-NMR differential spectroscopy. Furthermore, the DMSO/TBAH ionic liquids system was used to fractionate the ball-milled CW-DHP into three lignin-carbohydrate complex (LCC) fractions: glucan–lignin complex (GL), glucomannan–lignin complex (GML), and xylan–lignin complex (XL). The XRD determination indicated that the cellulose type I of the GL was converted into cellulose type II during the separation process. The molecular weight was in the order of Ac-GL > Ac-GML > XL. The13C-NMR and1H-NMR differential spectroscopy of13C-2H-enriched GL fraction indicated that lignin was linked with cellulose C-6 by benzyl ether linkages. It was also found that there were benzyl ether linkages between the lignin side chain C-α and glucomannan C-6 in the13C-2H-enriched GML fraction. The formation of ketal linkages between the C-α of lignin and xylan was confirmed in the13C-2H-enriched XL fraction.Keywords:lignin–carbohydrate complexes;CW-DHP;isotope labelling;ginkgo;NMR
研究领域:
植物科学
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化学
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生物技术
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）