APPLIED CLAY SCIENCE
·
2026
·
IF 5.8
Xiaoyu Li,Wenqing Zhang,Kang Peng,Zheng Zhou,Yewei Dou,Jianguo Feng
Molybdenum disulfide (MoS 2 ) is promising for aqueous-phase catalytic hydrogenation due to its two-dimensional morphology and abundant catalytic active sites, but limited by poor conductivity and hydrophobicity. Herein, a ternary FK/ATO/MoS 2 composite was fabricated by growing MoS 2 nanosheets on an antimony-doped tin oxide (ATO)-modified hydrophilic kaolinite nanoflakes (FK) via simple coprecipitation-hydrothermal method. Evaluated by the aqueous hydrogenation of 4-nitrophenol (4-NP), the optimal composite with 25% Sb doping in ATO and 50% MoS 2 loading (FK/ATO/MoS 2 –50%) exhibits remarkably enhanced hydrogenation activities as compared to other catalysts, and the reaction rate constant is 0.0809 min −1 , 10 times higher than that of pure MoS 2 (0.0081 min −1 ). The improved performances are due to the synergistic contributions from the exposed active sites of MoS 2 , the conductivity of ATO, the hydrophilicity and dispersion of kaolinite. This work presents an efficient aqueous-phase hydrogenation catalyst and a general design strategy for synergistic “support–mediator–active component” catalytic systems.
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产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2024
·
IF 0
Yue Xing,Chenxi Huang,Wenzhe Fu,Jingjing Wang,Xiang Shao
Understanding the intricate interplay between 2D materials (2DMs) and functional oxides is crucial for advancing various applications in nanoscience and nanotechnology. Within this context, we investigate the composite system comprising molybdenum disulfide (MoS2) and strontium titanate (SrTiO3) substrates, elucidating how controlled variations in a substrate surface structure modulate the growth and properties of MoS2. We developed a reliable method to manipulate the termination of SrTiO3(001) single crystals with different contents of TiO2 and SrO and fabricate high-quality MoS2 films selectively on the TiO2 area while avoiding all the SrO regions through a chemical vapor deposition strategy. Multiple characterization techniques revealed that such patterned MoS2 possesses not only ideal crystallinity but also a nanoporous structure with a large ratio of boundary sites which efficiently facilitates the charge transfer between MoS2 and the SrTiO3 substrate. Our findings underscore the pivotal role of substrate surface termination in modulating the electronic and optical properties of the composite system, paving the way for the rational design and engineering of 2DM-based devices for diverse applications in nanoelectronics and optoelectronics.
研究领域:
纳米科学
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材料科学
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光学性质
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DOI
Coatings
·
2022
·Vol. 12
·期 12
·1969
·
IF 3.236
Qinglin Deng,Lingmin Yao
The poor electronic conductivity and large volume expansion effect of MoS2limit its application in potassium-ion batteries (PIBs). In addition to exploring effective modification methods, it is also necessary to build a new self-standing electrode system to improve its energy density. In this work, based on the potassium storage advantages and disadvantages of MoS2and carbon nanofibers, we have successfully prepared a self-standing soft carbon-coated MoS2nanofiber film electrode without any additives or metal collectors. As for the application in PIBs, it exhibits excellent rate performances (about 93 mA h g−1at the current density of 10 A g−1), and superior long-term cycling stability performances (a high-capacity retention of ~75% after 1800 cycles at the current density of 1 A g−1). The enhanced potassium storage performance can be attributed to the unique self-standing nanofiber film architectures.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·Vol. 44
·期 60
·32019-32029
·
IF 4.084
Shanlin Qiao,Jia Zhao,Boying Zhang,Caihong Liu,Zheng Li,Shuozhen Hu,Qing Li
Electrocatalytic materials for hydrogen evolution reaction are crucial in water splitting. Developing low‒cost and highly active catalyst remains an enormous challenge. Herein, we reported a simple approach to synthesize a molybdenum disulfide/micrometer‒scale biomass carbon tube matrix (BCTM) which is derived from available and accessible plant wild celery. Molybdenum disulfide (MoS 2 ) nanosheet could be well dispersed on the BCTM to form porous structure , while the BCTM can enhance the conductivity of MoS 2 nanosheet . The synergistic effects between the MoS 2 nanosheet and BCTM contribute to high hydrogen evolution reaction activity. MoS 2 /BCTM shows admirable catalytic ability with a low overpotential of 176 mV at 10 mA cm −2 , a small Tafel slope 51 mV·dec −1 , and outstanding stability over 2000 cycles under acidic conditions. This novel strategy provides a low‒cost route to synthesize excellent MoS 2 ‒based catalyst, which may widely apply in the fields of electrocatalysis and photocatalysis .
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DOI
高影响因子
VACUUM
·
2023
·
IF 4
Binbin Ding,Lianbi Li,Lei Li,Tianming Wang,Changjun Zhu,Song Feng,Zebin Li,Jun Wang,Guoqing Zhang,Yuan Zang,Jichao Hu,Caijuan Xia
MoS 2 /graphene heterojunctions have a great potential for optoelectronic applications . Here, we demonstrate the oxygen (O 2 ) assisted growth of large-area monolayer MoS 2 films on graphene using chemical vapor deposition (CVD) technique. The introduction of O 2 has greatly improved the growth environment of MoS 2 domains as well as increased the grain size of MoS 2 from submicron to micron range. Spectroscopic results show that a monolayer of MoS 2 with high crystal quality has been deposited on the graphene. Effective charge transfer is observed in MoS 2 /graphene heterojunctions . MoS 2 is doped with different concentrations of O 2 in situ by optimizing its flow rates. The photodetector prepared by MoS 2 /graphene film has a good response to light. Due to the effective photoresponse of synthesized heterojunctions , these would be useful in various applications in the optoelectronic thin films and devices.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·Vol. 44
·期 59
·31008-31019
·
IF 4.084
Jiayuan Hu,Yuhang Li,Shengsen Zhang,Qiao Zhang,Yunpeng Liu,Jianliang Zuo,Qiong Li,Feng Peng
The substitution of noble metal platinum catalyst is one of the important research contents for sustainable development and is also the key to the practical application of photoelectrochemical (PEC) hydrogen production . In this work, we loaded the 1T-2H mixed phase MoS 2 on the hydrogenated anatase/rutile heterophase TiO 2 (A-H-RTNA) by hydrothermal method to prepare a new MoS 2 /A-H-RTNA electrode material. The prepared material exhibited higher carrier density, lower PL intensity and higher conductivity than Pt/A-H-RTNA because 1T-MoS 2 has more active sites and lower charge transfer resistance than Pt. With the bias voltage of −0.4 V, the optimized 16MoS 2 /A-H-RTNA as photocathode shows the largest PEC hydrogen production rate of 1840 mmol m −2 h −1 , which is 2.9 and 2.2 times higher than those of A-H-RTNA (625 mmol m −2 h −1 ) and Pt/A-H-RTNA (848 mmol m −2 h −1 ), respectively. We innovatively used the prepared 16MoS 2 /A-H-RTNA film as counter electrode instead of Pt electrode to construct a PEC system without any noble-metal. The result demonstrates that the noble-metal-free MoS 2 loaded on TiO 2 electrode as counter electrode has 75% PEC activity of noble metal Pt electrode. This study develops a PEC method for hydrogen evolution , which no longer depends on precious metal platinum as cathode.
研究领域:
材料科学
·
光催化
·
氢能
·
电化学
·
纳米材料
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xiangxi Wang,Lei Li,Zhao Wang,Zhuoyan Wu,Min Zhu,Shili Gai,Zhiliang Liu,Piaoping Yang
Boosting stability, durability, and intrinsic activity of electrocatalysts are the world’s concerns in promoting the application of oxygen evolution reaction (OER). Ni is averagely required in efficient electrocatalysts for OER, while Mo is familiar to hydrogen evolution reaction (HER). Herein, we introduce Mo into electrocatalysts for OER and synthesize an echinoids-like MoS 2 @NiS 2 electrocatalyst with unique morphology, which demonstrates rapid reaction kinetics and impressive catalysis activity. Furthermore, the electrocatalyst shows low overpotentials of 356 mV at 100 mA cm −2 as well as a Tafel slope of 82.6 mV dec −1 in alkaline media. Meanwhile, the electrocatalyst has a large double-layer capability ( C dl ) and electrochemically active surface areas (ECSA) values. The OER performances remarkably enhanced with the help of MoS 2 affiliation. Owning to the Ni compounds as the substrate, the catalyst can maintain a good stability in alkaline solution even after 10 h of chronoamperometry test at 1.51 V. Our study proposes a feasible way to obtain a high-efficient and robust OER electrocatalyst for the practical application.
研究领域:
电化学
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材料科学
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能量转换
·
催化
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiaohu Pi,Xuxu Sun,Ruiqi Wang,Changle Chen,Shengbing Wu,Furu Zhan,Junbo Zhong,Qi Wang,Kostya Ken Ostrikov
With the surging demand for flexible and portable electronic devices featuring high energy and power density, the development of next-generation lightweight, flexible energy storage devices is crucial. However, achieving the expected energy and power density of supercapacitors remains a great challenge. This work reports a facile plasma-enabled method for preparing supercapacitor electrodes made of MoS 2 nanosheets grown on flexible and lightweight N -doped carbon cloth (NCC). The MoS 2 /NCC presents an outstanding specific capacitance of 3834.28 mF/cm 2 at 1 mA/cm 2 and energy density of 260.94 µWh/cm 2 at a power density of 354.48 µW/cm 2 . An aqueous symmetric supercapacitor fitted with two MoS 2 /NCC electrodes achieved the maximum energy density of 138.12 µWh/cm 2 and the highest power density of 7,417.33 µW/cm 2 , along with the excellent cycling stability of 83.3 % retention over 10,000 cycles. The high-performance energy storage ASSSs (all-solid-state supercapacitors) are demonstrated to power devices in both rigid and flexible operation modes. This work provides a new perspective for fabricating high-performance all-solid-state flexible supercapacitors for clean energy storage.
研究领域:
材料科学
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储能
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纳米技术
·
电化学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 45
·31211-31216
·
IF 4.449
Xiaolong Lu,Rongguo Wang,Lifeng Hao,Fan Yang,Weicheng Jiao,Ping Peng,Feng Yuan,Wenbo Liu
Oxidative etching has been proved to be an efficient top-down method to prepare quantum dots (QDs) of layered transition-metal dichalcogenides which possess unique properties and have potential applications in various areas. Here, one facile and green oxidative etching method induced by UV irradiation is reported to prepare the QDs of MoS2/WS2 in aqueous solution, respectively. A prominent morphology change occurred to the nanosheets of MoS2/WS2 after irradiation and finally they were etched to ultrasmall nanoparticles which were proved to be the QDs. Insight into the etching mechanism was discussed in detail and hydroxyl free radicals (˙OH) were conclusively demonstrated to play the main role in etching nanosheets. From another point of view, this work also proves the crucial long-term photo instability of MoS2/WS2 since there are increasing photo-related applications of them and points out an easy way to degrade their nanosheets.
研究领域:
材料科学
·
纳米技术
·
光化学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 26
·期 35
·6371-6379
·
IF 11.382
Wei Zheng,Junhao Lin,Wei Feng,Kai Xiao,Yunfeng Qiu,XiaoShuang Chen,Guangbo Liu,Wenwu Cao,Sokrates T. Pantelides,Wu Zhou,PingAn Hu
2D layered MoS 2 has drawn intense attention for its applications in flexible electronic, optoelectronic, and spintronic devices. Most of the MoS 2 atomic layers grown by conventional chemical vapor deposition techniques are n-type due to the abundant sulfur vacancies. Facile production of MoS 2 atomic layers with p-type behavior, however, remains challenging. Here, a novel one-step growth has been developed to attain p-type MoS 2 layers in large scale by using Mo-containing sol–gel, including 1% tungsten (W). Atomic-resolution electron microscopy characterization reveals that small tungsten oxide clusters are commonly present on the as-grown MoS 2 film due to the incomplete reduction of W precursor at the reaction temperature. These omnipresent small tungsten oxide clusters contribute to the p-type behavior, as verified by density functional theory calculations, while preserving the crystallinity of the MoS 2 atomic layers. The Mo containing sol–gel precursor is compatible with the soft-lithography techniques, which enables patterned growth of p-type MoS 2 atomic layers into regular arrays with different shapes, holding great promise for highly integrated device applications. Furthermore, an atomically thin p–n junction is fabricated by the as-prepared MoS 2 , which shows strong rectifying behavior.
研究领域:
材料科学
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纳米技术
·
半导体物理
·
电子器件
·
光电子学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jiahao Yao,Haiyang Liu,Qingming He,Kai Chen,Yaping Wu,Xu Li,Chunmiao Zhang,Zhiming Wu,Junyong Kang
Two-dimensional (2D) 2H-1 T′ heterojunctions based on transition-metal dichalcogenides have attracted great attention due to their special interface structures and novel properties. Understanding the growth mechanism and the interface structures is essential for their controllable growth. In this work, we successfully synthesize lateral and vertical MoS 2 /ReS 2 heterojunctions by using a two-step chemical vapor deposition (CVD) method, and deeply explore the evolution of the structure. It is found that the growth mode of heterojunction undergoes a transition from lateral epitaxy to vertical stacking under a high Re/S ratio during the growth. Furthermore, the interface structure is greatly determined by the edge shape of MoS 2 core. Two kinds of structures, with the b-axis of 1 T′ ReS 2 shell parallel to the (1 0 0) and (0 1 0) plane of MoS 2 core respectively, are observed. Meanwhile, by comparing with MoS 2 monolayer, MoS 2 /ReS 2 heterostructures possess a reduced emission intensity due to the carrier transfer. This work provides a robust and controllable strategy for the synthesis of heterostructures with different phase structures.
研究领域:
材料科学
·
纳米技术
·
凝聚态物理
·
半导体器件
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2020
·
IF 6.155
Haiyang Yu,Zhenzhu Wang,Jiangfeng Ni,Liang Li
Molybdenum disulfide (MoS 2 ) is a promising electrode material for sodium-ion batteries as it offers a large capacity through a distinct conversion reaction. However, the electrochemical potential of MoS 2 is often restrained by the poor conductivity as the dominant 2H phase is a semiconductor while the metallic 1T phase is thermodynamically unstable. In this work, we report a hybrid design and material preparation of freestanding nanosheets of MoS 2 composed of both 1T and 2H phases based on mild hydrothermal reaction . The introduction of the metallic 1T-MoS 2 phase into 2H-MoS 2 and their intimate hybridization enable a significant improvement in electronic conductivity, while the freestanding architecture avoids possible electrochemical aggregation. When used as electrodes for sodium storage, such a hybrid MoS 2 affords a high capacity of ∼500 mA h g −1 at 0.5 A g −1 after 300 cycles, and retains capacity of ∼200 mA h g −1 at a high current rate of 4 A g −1 , thus demonstrating their potential in high-performance battery applications.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）