NANOTECHNOLOGY
·
2023
·Vol. 34
·期 40
·405704
·
IF 3.5
Gangshuo Liu,Chao Yan,Xinqi Sui,Dengfeng Kuang
It is important to clarify the role and possible applicability of partially disordered structures in photonics, but there is still a lack of an effective method for it. Here, we investigate partially disordered MoSe2 nanospheres experimentally regarding their morphology and absorption spectrum in broadband wavelengths and propose an optical simulation with three-dimensional finite-difference time-domain method to explain the crucial impacts of morphological parameters on optical responses. The experimental spectral absorbance of MoSe2 nanospheres reveals a strong light-absorbing character in broadband wavelengths. The simulated spectral curves coincide with the experimental results by adjusting morphological parameters, i.e. the statistics of size and the number of layer, and the linear correlation coefficient between the simulated and experimental spectral curves is up to 0.94. The disorder plays a key role in the high light-absorption feature, and the feature originates from anti-reflection, defective state absorption, multiple light scattering and coherent diffusion effects. The results not only deepen the understanding of disordered photonics in semiconductor nanostructures, but also provide a simulation approach to optimize experimental designs.
研究领域:
材料科学
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光学
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纳米技术
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DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Jiejing Yang,Ruxue Zhang,Nan Lv,Shirui Zhang,Cheng Liu,Yuteng Zhang,Haifeng Zhang
Piezoelectric catalysis has emerged as a promising strategy for efficient and sustainable environmental remediation. Here, FeSe 2 /MoSe 2 heterojunction nanocomposites are developed with significantly enhanced piezoelectric catalytic performance. The formation of a Z-scheme FeSe 2 /MoSe 2 heterojunction markedly boosts the degradation of Rhodamine B (RhB), enabling complete removal within 8 min. The corresponding kinetic rate constant reaches 148.5 L·mg⁻¹·min⁻¹, which is 14,850- and 565-fold higher than those of pristine FeSe 2 and MoSe 2 , respectively. This remarkable improvement arises from the synergistic coupling of the heterointerface and strain-induced piezoelectric polarization, which generates an internal electric field that promotes efficient charge separation, suppresses carrier recombination, and preserves strong redox activity. This work highlights the potential of piezoelectric heterostructures as a general strategy for mechanically driven catalytic processes. Download: Download high-res image (347KB) Download: Download full-size image
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DOI
高影响因子
Nanoscale Research Letters
·
2020
·Vol. 15
·期 1
·1-10
·
IF 3.578
Wu Pengyuan,Sun Gangyong,Chen Yuanzhi,Xu Wanjie,Zheng Hongfei,Xu Jin,Wang Laisen,Peng Dong-Liang
Combining MoSe 2 with other transition metal dichalcogenides to form a hybrid nanostructure is an effective route to enhance the electrocatalytic activities for hydrogen evolution reaction (HER). In this study, MoSe 2 -Ni 3 Se 4 hybrid nanoelectrocatalysts with a flower-like morphology are synthesized by a seed-induced solution approach. Instead of independently nucleating to form separate nanocrystals, the Ni 3 Se 4 component tends to nucleate and grow on the surfaces of ultrathin nanoflakes of MoSe 2 to form a hybrid nanostructure. MoSe 2 –Ni 3 Se 4 hybrid nanoelectrocatalysts with different Mo:Ni ratios are prepared and their HER catalytic activities are compared. The results show that the HER activities are affected by the Mo:Ni ratios. In comparison with pure MoSe 2 , the MoSe 2 -Ni 3 Se 4 hybrid nanoelectrocatalysts having a Mo:Ni molar ratio of 2:1 exhibit enhanced HER properties with an overpotential of 203 mV at 10 mA/cm 2 and a Tafel slope of 57 mV per decade. Improved conductivity and increased turnover frequencies (TOFs) are also observed for the MoSe 2 -Ni 3 Se 4 hybrid samples.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Weibin Guo,Yuanzhi Chen,Laisen Wang,Jin Xu,Deqian Zeng,Dong-Liang Peng
MoSe 2 represents an important layered transition metal dichalcogenides (LTMDs) that have high electrocatalytic activity in hydrogen evolution reaction (HER). A key issue to achieve excellent electrochemical properties of MoSe 2 is to synthesize nanostructures that are composed of few-layer MoSe 2 with maximized exposure of active edge sites. In this study, we report the synthesis of MoSe 2 nanostructures with network-like and flower-like morphologies via an organic solution approach that utilizes molybdenum hexacarbonyl as Mo precursor and Se powders as Se source. The prepared MoSe 2 nanostructures consist of few-layer ultrathin nanosheets which can have different orientations. Depending on the volume ratio of oleylamine to oleic acid , the arrangement of ultrathin MoSe 2 nanosheets is adjustable and can form porous network-like or discrete flower-like nanostructure which has large specific surface area and a wealth of exposed edge sites. Excellent HER activities with low overpotentials, small Tafel slopes and long-term durability are observed on the as-synthesized MoSe 2 nanostructures. The acetic acid-washing step that may effectively remove the organic molecules capped on MoSe 2 surfaces is also found to be efficient in improving the HER activity of the synthesized MoSe 2 nanostructures.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yang Kuang,Gang Zhao,Tengrui Feng,Luchao Zhao,Qi Wu
Molybdenum diselenide (MoSe 2 ) has been extensively researched as a promising electrocatalyst for hydrogen evolution reaction (HER). However, its intrinsic properties are still constrained by insufficient exposure of the active site and poor electrical conductivity. Therefore, it is essential to synthesize metallic phase MoSe 2 (1T-MoSe 2 ) with abundant active sites in order to further enhance its HER performance. To achieve this goal, Co-doped MoSe 2 nanosheets with a high 1T phase concentration were synthesized using a simple one-step hydrothermal method. Experiments and theories have demonstrated that Co doping induces the phase transition of MoSe 2 from the 2H to the 1T phase. In a 1 M KOH solution, the overpotential of Co-doped 1T-MoSe 2 at 10 mA cm −2 is only 218 mV, which is significantly superior to that of pure MoSe 2 (287 mV), and the Tafel slope is lower at 115.7 mVdec −1 . Furthermore, the nanosheets exhibited high stability, retaining their catalytic properties even after 200 h of continuous use. Density functional theory (DFT) calculations indicate that Co doping enhances the electrical conductivity and the achieves a minimal value of ΔG H∗ (only about 0.094 eV). This work proposes a strategy to design highly efficient electrocatalysts based on 1T-MoSe 2 .
研究领域:
材料科学
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电化学
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纳米技术
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能量转换
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 22
·11357-11363
·
IF 8.867
Xiaoshuang Chen,Yunfeng Qiu,Guangbo Liu,Wei Zheng,Wei Feng,Feng Gao,Wenwu Cao,YongQing Fu,Wenping Hu,PingAn Hu
This study presents the successful growth of defective 2D terrace MoSe2/CoMoSe lateral heterostructures (LH), bilayer and multilayer MoSe2/CoMoSe LH, and vertical heterostructures (VH) nanolayers by doping metal cobalt (Co) element into MoSe2 atomic layers to form a CoMoSe alloy at high temperatures (∼900 °C). After the successful introduction of metal Co heterogeneity in the MoSe2 thin layers, more active sites can be created to enhance hydrogen evolution reaction (HER) activities combining with metal Co catalysis through mechanisms such as (1) atomic arrangement distortion in CoMoSe alloy nanolayers, (2) atomic level coarsening in LH interfaces and terrace edge layer architecture in VH, and (3) formation of defective 2D terrace MoSe2 nanolayers heterogeneous catalyst via metal Co doping. The HER investigations indicated that the obtained products with LH and VH exhibited an improved HER activity in comparison with those from pristine 2D MoSe2 electrocatalyst and LH type MoSe2/CoMoSe. The present work shows a facile yet reliable route to introduce metal ions into ultrathin 2D transition metal dichalcogenides (TMDCS) and produce defective 2D alloy atomic layers for exposing active sites, eventually improving their electrocatalytic performance.
研究领域:
材料科学
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电催化
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纳米技术
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能量转换
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过渡金属硫族化合物
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DOI
高影响因子
CARBON
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2022
·
IF 11.307
Xiao-Ying Fu,Qi Zheng,Lin Li,Mao-Sheng Cao
It is still a challenging project for developing electromagnetic (EM) wave absorption materials with the properties of multi-band absorption in the field of microwave absorption . Herein, honeycomb-like MoSe 2 @reduced graphene oxide (RGO) composites are successfully constructed by a facile one-step solvothermal method. The polarization and conductive loss can be precisely tailored by vertically implanting MoSe 2 nanosheets on the RGO sheet. It is notable that three-band absorption, including S, X, and Ku bands, was achieved in the composites. The optimized MoSe 2 @RGO composite exhibits excellent microwave absorption performance, the maximum reflection loss (RL) value can reach −56.9 dB and an effective absorption bandwidth (EAB) value can reach 4.12 GHz. The excellent microwave attenuation capability is attributed to the synergy effect of conductive loss, multiple relaxations, and excellent impedance matching in the composites. Therefore, this work provides a new paradigm for developing efficient multifunctional EM wave absorbers.
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 SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 6
·1825-1834
·
IF 2.647
Zhang Kai,Jiang PingPing,Nie Zhixin,Gu Qian,Zhang Pingbo
The development of transition metal-based catalysts for hydrogen evolution reaction with high active and stable performance is becoming an important means to reduce the energy consumption and cost of hydrogen products. In this paper, a two-step adding hydrothermal approach is conducted to manufacture 3D flower-like heteronanostructures composed of MoSe 2 -rGO-CNTs for the efficient electrocatalysis for hydrogen evolution reaction (HER) by acid medium hydrolysis. The physical structures and chemical compositions of the heteronanostructures were characterized with several techniques such as scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The heterostructures of the flower-like MoSe 2 -rGO-CNTs are formulated by in situ combination of the monolayer rGO-CNTs and MoSe 2 crystals, where the excellent quality transverse heterostructures can boost the electrons transferring from the monolayer rGO-CNTs interfaces to the MoSe 2 crystals, accomplishing the electronic deployment of MoSe 2 -rGO-CNTs heterostructures for prominent electrocatalytic performance. After optimization, the as-synthesized MoSe 2 -rGO-CNTs heterostructures catalyst exhibited an excellent electrocatalytic activity in 0.5 M H 2 SO 4 solution with an overpotential of 206 mV at the current density of 10 mA·cm −2 and a Tafel slope of 46.74 mV·dec −1 for HER reaction. The optimal MoSe 2 -rGO-CNTs heteronanostructures display an excellent HER electrocatalytic activity and superior long-term durability in an acidic medium. Graphical Abstract
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Jinzhu Wu,Yue Liu,Yuan Yao,Yanbin Shao,Xiaohong Wu
Superabsorbers can find application in the fields of solar cells, blackbody radiation, thermal control systems, and stray light elimination devices. Herein, graphene-like 2H/1T-molybdenum diselenide (MoSe 2 ) was synthesized via a hydrothermal method and shows superhigh solar absorption (~99%) within a range of 200–2500 nm. In the synthesis, selenium dioxide (SeO 2 ) was used as a Se source instead of Se powder, which plays an important role in manipulating the graphene-like morphology and the multiphasic composition of the MoSe 2 . Consequently, the as-prepared MoSe 2 nanoflowers possess desired band structure and abundant pores and pore channels for strong optical absorption. DFT calculations clarify that the 1T-MoSe 2 primarily contributes to the superior optical absorption over the 2H-MoSe 2 . This work provides a facile strategy for enhancing the optical absorption of two-dimensional transition metal dichalcogenides (2D TMDCs) by engineering morphology and phase.
研究领域:
材料科学
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物理化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Zhouyue Lei,Wencheng Zhu,Shengjie Xu,Jian Ding,Jiaxun Wan,Peiyi Wu
A facile poly(vinylpyrrolidone) (PVP)-assisted exfoliation method is utilized to simultaneously exfoliate and noncovalently modify MoSe2 nanosheets. The resultant hydrophilic nanosheets are shown to be promising candidates for biocompatible photothermal therapy (PTT) agents, and they could also be encapsulated into a hydrogel matrix for some intelligent devices. This work not only provides novel insights into exfoliation and modification of transition metal dichalcogenide (TMD) nanosheets but also might spark more research into engineering multifunctional TMD-related nanocomposites, which is in favor of further exploiting the attractive properties of these emerging layered two-dimensional (2D) nanomaterials.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
诊疗学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Xianpei Ren,Qiang Ma,Pinyun Ren,Yonghua Wang
Benefiting from improved electrical conductivity , the N-doped MoSe 2 nanosheets show substantially enhanced HER activity with a lower onset overpotential of approximately −135 mV and a smaller Tafel slope of 62 mV dec −1 , which exhibiting enhanced catalytic performance compared with that of pure MoSe 2 . The success of improving the HER performance via the introduction of N dopant offers a new opportunity in the development of high performance MoSe 2 -based electrocatalyst .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Bing Yang,Yue Song,Yang Song,Ziyu Ma,Jianbo Sun
2D transition metal selenides are facing challenges in the field of gas sensing due to their short carrier lifetime and low utilization rate. Along these lines, in this work, MoSe 2 nanosheets were successfully synthesized by solvothermal method , and modified with TiO 2 QDs. P-N heterostructures with the advantage of quantum dot constraint effect are constructed. The developed heterojunction can effectively promote the separation and transfer of the generated charges, under the excitation of ultraviolet light , while the room temperature sensitivity of the material for the detection of NO 2 is enhanced.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）