COMPOSITES PART B-ENGINEERING
·
2023
·
IF 13.1
Fei Wu,Mengyun Ling,Lei Zhang,Qiuyu Zhang,Baoliang Zhang
Herein, we propose a combination strategy to induce robust room-temperature electromagnetic coupling in non-magnetic MoS 2 semiconductor (2H–MoS 2 ). The introduction of ascorbic acid (AA) is intended to introduce sulfur vacancies ( sv ) in the process of 2H–MoS 2 nano-sheet shells coating on the surface of three-dimensional (3D) matrix. It promotes the transformation of local lattice (2H–MoS 2 ) into metal phase (1T-MoS 2 ). The transformed 1T-MoS 2 phase improves the conductivity ( σ ) of the composite by 1.48 times. Due to the Mo 4+ 4 d energy state within the bandgap, the exchange interaction between the sv and the Mo 4+ 4 d bandgap state produces a robust intrinsic electromagnetic response of more than 1.2 emu/g. Density functional theory (DFT) calculations are used to analyze the above results, and a novel electromagnetic-coupling-enhanced microwave absorption mechanism is proposed. The results indicates that microwave absorption performance can be effectively improved by the phase-incorporation effect. The minimum reflection loss (RL min ) reaches −53.1 dB (1.7 mm) and the adjustable effective absorption bandwidth (EAB) covers 14.5 GHz (3.5–18 GHz) at the various matching thicknesses. This work might shed light on a new possibility of manipulating electromagnetic interaction to promote microwave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2024
·
IF 5.5
Kunjie Wang,Yanan Li,Dongxu Yang,Yunsi Wang,Fuan Wei,Bingxin Liu,Peng Zhang,Benhua Xu,Yongcheng Li
Coupling noble metals on molybdenum disulfide (MoS 2 ) has emerged as a promising strategy for triggering inert basal plane and boosting hydrogen evolution reaction (HER) performances. Herein, ultrafine Ru nanoparticles (NPs) are decorated on vertical 2H MoS 2 nanosheets via a facile hydrothermal method. Benefiting from new active site centers triggered by ultrafine Ru NPs and vertically grown 2H MoS 2 nanosheets on carbon cloth (CC), Ru 0.15 @2H MoS 2 exhibits impressive HER performances in dual pH media, with low overpotentials of 20 and 111 mV and small Tafel slope of 67.6 and 76.3 mV dec ‑1 in alkaline and acid solutions to drive a current density of 10 mA cm -2 . DFT calculation results prove that ultrafine Ru NPs decorated on 2H MoS 2 nanosheets endow Ru 0.15 @2H MoS 2 with low hydrogen adsorption free energy and fast charge transfer kinetics. This work provides an effective and simple method for designing MoS 2 -based catalysts with high catalytic activity to decorate precious metal in a wide pH medium.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shiting Li,Yuehan Wang,Chang Cai,Hong Huang,Honggen Peng,Xiaoxiao Fu,Zhimin Ao,Chunyang Nie
MoS 2 polytypes are emerging as compelling metal-sulfide catalysts for peroxymonosulfate (PMS) activation in water decontamination. The catalytic properties of the 1 T and 2H phases have been extensively explored, the performance of the 3 R polytype remains largely unknown. This work presents a comparative investigation of bulk 2H-MoS 2 and 3R-MoS 2 for activating PMS to remove phenol, with a specific focus on the understudied 3 R phase. A ball-milling pretreatment was employed to create sulfur vacancies, a critical active site, in both polytypes. Through a combined experimental and theoretical approach, we demonstrate that sulfur-defective 2H-MoS 2 exhibits superior catalytic activity for PMS activation, with a phenol degradation reaction rate constant 4.3 times higher than that of its 3 R counterpart. More importantly, we unveil that both polytypes activate PMS predominantly via a nonradical pathway mediated by surface Mo-PMS⁎ complexes, rather than generating free radicals. However, in-situ Raman spectroscopy and DFT calculations reveal that the distinct electronic structures of the two polytypes lead to the formation of Mo-PMS complexes with different configurations and oxidative capabilities, explaining their disparate selectivity towards various organic pollutants. This study provides the first mechanistic insight into PMS activation by 3R-MoS 2 and establishes that the crystal polytype is a critical, previously overlooked factor governing the efficiency and oxidation pathway in MoS 2 -based advanced oxidation processes, offering a vital guideline for selecting suitable MoS 2 catalysts in environmental applications.
研究领域:
环境催化
·
高级氧化工艺
·
材料科学
·
水处理
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Jia-Cheng E. Yang,Min-Ping Zhu,Xiaoguang Duan,Shaobin Wang,Baoling Yuan,Ming-Lai Fu
Two-dimensional layered MoS 2 recently demonstrates great potentials in water purification via adsorption and catalysis. The structure-catalysis relationship of MoS 2 has not been well addressed. Herein, we investigated the mechanistic difference of 1 T-2H MoS 2 homojunctions in catalytic activation of peroxymonosulfate (PMS) and peroxydisulfate (PDS) for degrading butyl paraben (BPB). PMS/1 T-2H MoS 2 attains higher performance in BPB removal compared to PDS/1 T-2H MoS 2 . 1 T phase in MoS 2 primarily contributed to PMS activation to produce SO 4 − , OH and 1 O 2 , while the defects in MoS 2 coordinated the PDS activation to generate OH, 1 O 2 and O 2 − . Nevertheless, OH-induced BPB removal was the top priority for PMS/1 T-2H MoS 2 and PDS/1 T-2H MoS 2 . The different activation pathways and reactive species resulted in the varying BPB removal, by-product distributions and toxicity. This work provides new insights into the different functions of MoS 2 in persulfates activation and the guidance in rational design of oxidant-oriented MoS 2 composites for sewage purification.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2022
·
IF 4.291
Shufang Ren,Wangyong Cui,Ying Liu,Shounian Cheng,Qingtao Wang,Runyan Feng,Zhixiang Zheng
1T phase molybdenum disulfide (MoS 2 ) possesses excellent electrical conductivity , 10 7 times higher than that of 2H phase MoS 2 . Thus, metallic 1T MoS 2 is highly desirable for electrochemical analysis and catalysis. In this study, hybrid 1T/2H MoS 2 /multi-walled carbon nanotubes (MoS 2 /MWCNTs) composite was prepared by a facile and simple hydrothermal approach. Powder X-ray diffraction, field emission scanning and transmission electron microscopes, Fourier transform infrared spectroscopy, Raman spectroscopy , cyclic voltammetry (CV), and electrochemical impedance spectroscopy were used to characterize the composites. The results show that metallic 1T phase MoS 2 was formed by the inductive effect of MWCNTs. The high conductivity and large specific surface area of hybrid 1T/2H MoS 2 /MWCNTs composite endow great catalysis activity in electrochemical analysis. Polypyrrole molecularly imprinted polymer (MIP) film imprinted with acetaminophen (AP) template was electrochemically deposited on glassy carbon electrode (GCE) modified by 1T/2H MoS 2 /MWCNTs (MoS 2 /CNTs/GCE) to construct MIP based sensor. The prepared MIP/MoS 2 /CNTs/GCE sensor shows a sensitive current response towards AP. Through the optimization of the ratio of monomer and template, CV electropolymerization cycles, CV elution cycles, incubation time, and pH, the accessible linear range of 0.01–300 μM was obtained with the limit of detection of 0.003 μM (S/N = 3) by differential pulse voltammetry . In addition, the prepared sensor shows great detecting robustness with excellent selectivity , anti-interference property, reproducibility, and stability. In the urine sample tests, the sensor shows desirable reliability with the recovery rate of 88.1–95.9%.
研究领域:
分析化学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
·
IF 3.8
Jinchao Chen,Zhi Chen,Wan Zhao,Yurong Liu,Jianhao Wu,Weiwei Wang,Xiangyu Chen,Jingyang Gao,Jinglei Hu,Lili Xie,Qiyan Wei,Lan Li
Molybdenum disulfide (MoS 2 ) is a member of promising transition-metal dichalcogenides (TMDs); however, its practical application is restricted due to the heavy aggregation. 1T/2H-MoS 2 decorated with SiO 2 nanospheres was successfully prepared through a facile hydrothermal process demonstrating improved behavior for the visible-light-driven treatment of aquatic antibiotic residues. The prepared samples were characterized by XRD, Raman spectra, SEM, TEM, XPS, and KPFM systematically. The improved properties are related to the increased light absorption, decreased accumulation of 1T/2H-MoS 2 , and the reduced recombination of electron-hole pair due to the introduction of SiO 2 . Moreover, the scavenger studies confirm that superoxide radicals (⋅O 2 − ), hydroxyl radicals (⋅OH), and holes (h + ) play a vital role in the photocatalytic degradation of TC-HCl, and a possible mechanism for photocatalysis is discussed. This work provides a promising strategy to modify the photocatalytic performance by simply dispersing the photocatalyst with another component such as SiO 2 .
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 35
·16531-16538
·
IF 3.3
Yulong Zheng,Hui Zhang,Pei Han,Zhaoshun Zhang,Xueqin Zuo,Qun Yang,Huaibao Tang,Shaowei Jin,Guang Li
Solar distillation can directly produce clean water from non-potable water resources using solar energy and has great promise in desalination systems. However, the improvement of evaporation efficiency through the selection and optimization of suitable candidate materials is still a challenging problem. In this paper, by implementing a customized insulating floating layer and establishing an interfacial evaporation system, we have achieved a successful experiment demonstrating the potential to improve the efficacy of solar steam generation. This system is created by growing 1T-2H mixed-phase molybdenum disulfide composites on the carbonized ZIF8 surface. In this study, the treated composites were well integrated with the thermal insulating floating layer to achieve a stable interfacial structure for photothermal conversion. Furthermore, the cotton threads, known for their great absorbency, created an unhindered pathway for water flow, making it easier for steam to be generated and circulated. Using the above system, under one solar illumination condition, a significant evaporation rate of 1.57 kg m−2 h−1 was attained. The solar steam conversion efficiency of this interfacial heating system under one solar illumination condition was 94.4%. In addition to demonstrating that interface engineering is effective for solar steam production, this work offers a simple and economical water purification method.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 42
·22786-22796
·
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
·
能源存储
·
纳米技术
✓ 已验证
产品关联
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
·
电化学
·
纳米材料
·
能源存储
·
无机化学
·
固态物理
✓ 已验证
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.
✓ 已验证
DOI
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
·
润滑工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kunjie Wang,Yan Jing,Shuang Gao,Xianrong Liu,Bingxin Liu,Yongcheng Li,Peng Zhang,Benhua Xu
Implanting the octahedral phase (1 T) into the hexagonal phase (2H) of the molybdenum disulfide (MoS 2 ) matrix is considered one of the effective methods to enhance hydrogen evolution reaction (HER) performances of MoS 2 . In this paper, hybrid 1 T/2H MoS 2 nanosheets array was successfully grown on conductive carbon cloth (1 T/2H MoS 2 /CC) via facile hydrothermal method and the 1 T phase content in 1 T/2H MoS 2 is regulated to gradually increase from 0 % to 80 %. 1 T/2H MoS 2 /CC with 75 % 1 T phase content exhibits optimal HER performances. The DFT calculation results show that S atoms in 1 T/2H MoS 2 interface exhibit the lowest hydrogen adsorption Gibbs free energies (ΔG H* ) compared with other sites. The improvement of HER performances are primarily attributed to activating the in-plane interface regions of the hybrid 1 T/2H MoS 2 nanosheets. Furthermore, the relationship between 1 T MoS 2 content in 1 T/2H MoS 2 and catalytic activity was simulated by a mathematical model, which shows that the catalytic activity presents a trend of increasing and then decreasing with the increase of 1 T phase content.
研究领域:
材料科学
·
理论计算
·
电催化
✓ 已验证
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）