CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Dezhi Wang,Boyu Su,Yan Jiang,Lu Li,Boon K. Ng,Zhuangzhi Wu,Fangyang Liu
Molybdenum disulfide (MoS 2 ) has emerged as a prominent nanomaterial in photoelectrocatalytic water splitting due to its appropriate energy band and low production cost. However, its low-density active site and poor-efficiency electron transfer have essentially limited the photoelectrocatalytic properties. In this present study, we have proposed a simple yet novel ammoniated molybdenum disulfide with a unique 1T/2H heterostructure as the photoelectrocatalyst via a facile hydrothermal reaction. The presence of the 1T phase in MoS 2 is found to enhance the electronic conductivity as well as boost the density of the active site, resulting in an increase in efficiency for both electron transfer and mass transport. More importantly, the synergistic effect of the 1T/2H heterostructure of MoS 2 has been demonstrated to improve the photoelectrocatalytic properties.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhiwei Wang,Xiang Zhao,Fangzhen Hong,Hao Wang,Heng Lei,Zhiming Chou,Jiandong Zheng
The development of room-temperature (RT) formaldehyde sensors is significant for indoor air quality monitoring. In this contribution, titanium (Ti)-incorporated 1T/2H molybdenum disulfide (MoS2) phase heterostructures were prepared via a facile hydrothermal method. Compared with 1T/2H MoS2, the as-prepared 1T/2H Mo1–xTixS2 nanosheets showed a boosted RT formaldehyde sensing performance, which was attributed to the enhanced gas adsorption and charge transfer processes induced by Ti incorporation and could be regulated by tuning the Mo/Ti ratio in Mo1–xTixS2. In addition, the Ti-incorporated phase heterostructures with an optimized 1T concentration showed further improved gas-sensing properties compared to the highly metallic or semiconducting nanosheets with the same chemical composition, which exhibited an obvious response of 0.035% to 1 ppm formaldehyde with an excellent limit of detection as low as 39 ppb, good repeatability, and short response and recovery times. Moreover, flexible gas sensors based on the optimized nanosheets showed well-maintained responses under moderately bent conditions. Our findings demonstrate that the creation of phase heterostructures with tunable compositions and phases may provide more opportunities to tailor their sensing properties.
研究领域:
材料科学
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环境监测
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传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
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2024
·
IF 2.4
Nazeer Sana,Han Jingwei,Qi Junjie
Due to the fact that fossil fuels are limited and the world’s energy demand is rising, economic catalysts with exceptional stability and efficiency must be produced right now. MoS 2 ’s successfully increased catalytic activity by interfacial coupling and phase engineering. The 1T/2H-MoS 2 /Ni 3 S 2 composite was effectively created in this study by adding Ni 3 S 2 material on top of 1T/2H-MoS 2 (Mo: S = 1:4). The effects of varying concentrations of Ni 3 S 2 on hydrogen evaluation reaction characteristics are examined using the hydrothermal technique. The composite sample with an appropriate amount of Ni 3 S 2 has the best hydrogen evolution performance when compared to samples with other amounts of Ni 3 S 2 . The sample’s overpotential at 1 M KOH is 124 mV at 10 mAcm −2 , and its Tafel slope is 138.0 mVdec −1 . In addition, the sample exhibits good air stability and hydrogen evolution stability. Also, to accelerate the kinetics of hydrogen evolution and encourage H 2 O dissociation in an alkaline environment, Ni 3 S 2 efficiently stimulates MoS 2 ’s inert base surface, creates a rich coupling boundary, and greatly enhances the performance of electrocatalytic hydrogen evolution. Graphical abstract
研究领域:
材料科学
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电化学
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催化作用
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2026
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IF 17.3
Xuwu Xiao,Cheng Cheng,Cuizhi Chen,Lituo Zheng,Dong Wei,Mingdeng Wei,Zhensheng Hong
Photobatteries promise a revolutionary approach to both harvesting and storing solar energy; however, their development has been limited by rapid carrier recombination and the absence of interfaces to direct charge flow effectively. Here, we construct an in-plane 1T/2H-MoS2 heterostructure chemically connected onto carbon nanotubes (CNTs) that integrate metallic 1T-MoS2, semiconducting 2H-MoS2, and conductive CNTs into a multi-interface framework. This architecture generates a built-in electric field across the 1T/2H-MoS2 junction and provides continuous directional pathways for rapid electron extraction and transfer. Ultrafast transient absorption spectroscopy identifies long-lived charge-separated states with a prolonged carrier lifetime (τ2 ≈ 731 ps) in the 1T/2H-MoS2 heterostructure, more than double that of 2H-MoS2@CNTs. Meanwhile, Kelvin probe force microscopy reveals a pronounced light-induced potential gradient (∼75 mV), providing direct nanoscale evidence of efficient carrier extraction. These synergistic effects promote efficient charge separation and transport, enabling superior photoassisted lithium-ion storage. The 1T/2H-MoS2@CNTs-based lithium-ion photobattery demonstrates an increased storage capacity from 493.7 to 624.9 mAh g–1 at 0.5 A g–1 under illumination and a maximum photoconversion and storage efficiency of 6.62%, achieving an external voltage-free self-charging process. This study underscores rational multi-interface engineering to effectively integrate light harvesting and electrochemical storage for self-charging energy systems.
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产品关联
DOI
PubMed
高影响因子
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
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2023
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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
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
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2022
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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
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
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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
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材料科学
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催化化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 35
·16531-16538
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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
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能源技术
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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
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能源存储
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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
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电化学
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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
JOURNAL OF ALLOYS AND COMPOUNDS
·
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
·
电磁学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）