ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhangqiang Li,Zhexue Chen,Liuyang Xiao,Xuanping Zhou,Ce Zhao,Yong Zhang
Molybdenum disulfide (MoS2) quantum sheets (QSs) are attractive for applications due to their tunable energy band structures and optical and electronic properties. The photoluminescence quantum yield (PLQY) of MoS2 QSs achieved by mechanical and liquid exfoliation and chemical vapor deposition is low. Some studies have reported that chemical treatment and elemental doping can improve the PLQY of transition metal dichalcogenides (TMDs), but this is limited by complex instruments and reactions. In this study, a heat treatment method based on a polar solvent is reported to improve the PLQY and photoluminescence (PL) intensity of MoS2 QSs at room temperature. The absolute PLQY of treated MoS2 QSs is increased to 18.5%, and the PL intensity is increased by a factor of 64. This method is also effective for tungsten disulfide (WS2) QSs. The PL enhancement of QSs is attributed to oxidation of the edges. Such passivation/deformation of MoS2 QSs facilitates the radiative route rather than the nonradiative route, resulting in extreme enhancement of the PL. Our work could provide novel insights/routes toward the PL enhancement of TMD QSs.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaolong Fu,Huiying Wu,Zhihong Liu,Pengzhao Wang,Jiefeng Rong,Fengfu Fu,Zhenyu Lin,Yongqiang Dong
The chemical enhancement of semiconductor-based surface-enhanced Raman scattering (SERS) substrates is an exciting hot topic. Herein, a simple hydrothermal method is developed to prepare molybdenum disulfide (MoS2), which can be easily exfoliated into monolayer nanosheets (MoS2NSs) by sonication, even in the absence of any surfactant. The obtained MoS2NSs contain two types of defects, namely, one caused by the incorporation of Mo atoms of high valence states and one caused by the incorporation of S22–. The density of the two types of defects can be easily tuned by controlling the ratio of Na2S and Na2MoO4 in the raw materials. The unique properties and the clear surface make the obtained MoS2NSs ideal models to investigate the effect of defects on the SERS activity of MoS2. It is found that the SERS activity of the obtained MoS2NSs increases dramatically with the defects caused by Mo atoms of high valence states, while it first increases and then decreases with the increase of defects caused by S22–. On the basis, MoS2NSs with high SERS activity and a low detection limit of 5.0 × 10–9 mol/L toward crystal violet (CV) are obtained. Moreover, the mechanism of defects affecting the SERS activity of MoS2NSs is revealed. The defects on one hand provide a large amount of dangling bonds that can combine CV molecules to form MoS2NS–CV complex and on the other hand provide extensive induced local dipoles and enhance the overall SERS spectrum of CV.
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ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Lin Long,Erqi Yang,Xiaosi Qi,Ren Xie,Zhong-chen Bai,Shuijie Qin,Chaoyong Deng,Wei Zhong
Lots of research have focused on the core/shell structure nanocomposites owing to their synergistic effect that were considered as the most promising high-performance microwave absorbers (MAs). However, the excellent comprehensive properties of MAs are still in urgent need. Herein, positive and reverse core/shell structure CoxFe3–xO4/MoS2 (x = 1.5, 0.75 and 0.5) and MoS2/CoxFe3–xO4 (x = 0.5) nanocomposites were elaborately produced through an inexpensive two-step hydrothermal process. It was found that the CoxFe3–xO4/MoS2 samples exhibited a much smaller optimal reflection loss (RLopt) value and a broader frequency bandwidth (fb) with the lower value of matching thickness (dm) when the CoxFe3–xO4/MoS2 loadings were raised to 60 from 30 wt %. With the x value decreasing from 1.5 to 0.5, the obtained CoxFe3–xO4/MoS2 samples displayed a much smaller RLopt value with a thinner dm and a much larger fb value with the thin dm (∼2 mm). The sample consisting of 60 wt % CoxFe3–xO4/MoS2 (x = 0.5) exhibited an RLopt value of −66.83 dB with the dm of merely 1.57 mm, and its corresponding fb value could reach 6.64 GHz with the dm of 2.02 mm. Moreover, compared with the MoS2/CoxFe3–xO4 (x = 0.5) sample, the CoxFe3–xO4/MoS2 (x = 0.5) sample displayed evidently better microwave absorbing comprehensive performances in terms of low RLopt value, large fb value, and high chemical stability. Generally, the obtained results demonstrated that the designed CoxFe3–xO4/MoS2 nanocomposites could act as MAs with outstanding comprehensive properties.
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CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Zhiyi Gao,Zongjing Lu,Yining Zhang,Jing Xia,Xuejing Zhang,Chao Sun,Yijun Yang,Yong Xu,Ke Wang,Xi Wang,Jiannian Yao
Li-ion batteries (LIBs) suffer from severe capacity recession at subzero temperatures due to the dramatic increase in charge transfer resistance induced by the sluggish desolvation process. In this paper, we report on by using the weakly coordinating molecule as electrolyte (1 M LiPF 6 in EC: DMC: PC = 1:1:1 vol%), the cell with MoS 2 as the model electrode exhibits better cycling performance and rate capability than the cell using commercial electrolytes (1 M LiPF 6 in EC: DMC = 1:1 vol%). Theoretical calculations and infrared spectroscopy indicate that PC is a weakly coordinated electrolyte molecule to Li + . Further, the electrochemical kinetics indicates that more Li + in the as-made electrolyte can intercalate into the MoS 2 layer. The electrochemical impedance spectroscopy reveals that the weak interaction between Li + and solvent molecules reduces the activation energy of desolvation process. This novel design concept opens up new paths to exploit the advanced electrolyte for LIBs.
研究领域:
材料科学
·
电化学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zilun Hao,Daoyuan Nie,Meng Zhang,Weiwei Wang,Dong Zou,Guangze Nie
The engineering of macroscopic architectures by loading MoS 2 nanosheets onto larger framework materials is an efficient strategy to overcome the limitations preventing the application of nanosized MoS 2 -based adsorbents for Pb(II) removal. However, the large-scale utilization of these nanocomposites still faces several challenges as a result of their poor stability, slow adsorption kinetics, and low MoS 2 utilization. Herein, a practical and efficient nanocomposite (MoS 2 /PDA/MPS) was prepared by coating MoS 2 nanoflowers onto micron-sized polystyrene beads (MPS) via the construction of a strong adhesive polydopamine (PDA) interlayer. The PDA interface can adhere to the MPS surface and immobilize the MoS 2 nanopartices, thus facilitating the application of MoS 2 /PDA/MPS in flow-through systems. Further, the flower-like structure of the MoS 2 on the outer surface of the host exposes active sites and facilitates mass transfer compared to those of traditional nanocomposites. Meanwhile, the R-SO 3 - groups of MPS can enhance permeation and preconcentrate the Pb(II) ions via the Donnan membrane effect, resulting in improved adsorption kinetics and capacity. Batch adsorption experiments revealed that MoS 2 /PDA/MPS shows fast adsorption kinetics (<45 min), exceptional adsorption capacity (371.7 mg/g, calculated from the Langmuir model at 298 K), and high adsorption selectivity for Pb(II) uptake. The excellent stabilities and reusability of the nanocomposite were tested over 10 adsorption–desorption cycles. In addition, a considerable working capacity (approximately 2000 BV) in synthetic wastewater was observed in fixed-bed column tests, and the used adsorbent could be readily regenerated with a binary NaCl–EDTANa 2 solution for reuse without significant capacity loss. Thus, MoS 2 /PDA/MPS has great applications for the remediation of lead-containing wastewater, and our findings provide new insights into the preparation of efficient MoS 2 -based adsorbents having practical applications.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
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IF 5.667
Imran Mahmood Khan,Sen Zhao,Sobia Niazi,Ali Mohsin,Muhammad Shoaib,Nuo Duan,Shijia Wu,Zhouping Wang
T-2 is a trichthecenes mycotoxin responsible for severe food poisoning and toxic influences in humans and animals. Therefore, a rapid and sensitive detection of T-2 is an urgent need to protect the public health mainly caused by the consumption of contaminated agricultural products. Herein, we have prepared one pot synthesis of aptamer functionalized silver nanoclusters (apt-AgNCs) for fluorescent detection of T-2 that relies on novel fluorescence resonance energy transfer (FRET). Apt-AgNCs, act as energy donor, were applied as fluorescent sensing probe whose fluorescence was quenched by MoS 2 employed as fluorescent acceptor. Introduction of target in proposed bioassay leads to desorption of Apt-AgNCs from MoS 2 , and recovery of fluorescence in a toxin concentration dependent-manner. A dynamic quantification range was 0.005–500 ng mL −1 while the LOD was 0.93 pg mL −1 . Spiking analysis reveals the efficiency and robustness of the developed assembly, with recovery percentages ranged from 89.46% to 102.08% and 90.41% to 107.75% in maize and wheat samples, respectively. The results were cross-verified using standard commercial T-2 EISA kit. In conclusion, developed bioassay may find good utility in testing for risk assessment of T-2 toxin.
研究领域:
食品安全
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生物传感
·
毒理学
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Advanced Materials Interfaces
·
2019
·Vol. 6
·期 13
·1900460
·
IF 4.713
Peng Tao,Junjie He,Tong Shen,Yu Hao,Jingkai Yan,Zijie Huang,Xueer Xu,Meng Li,Yu Chen
A novel 3D porous foam consisting of interlinking N-doped MoS 2 nanosheets is synthesized through a templating-drying-carbonization process, where melamine-formaldehyde is used as both template and nitrogen source. Benefit from the N-containing MoS 2 , 3D porous structure, and residual N-doped carbon, N-doped MoS 2 foam (NMF) exhibits greatly improved electrochemical performance especially in term of rate capability for sodium storage compared with their pristine counterpart. Specifically, NMF shows outstanding rate capability with high reversible capacities reaching up to 407 mAh g −1 after 100 cycles under a current density of 1 A g −1 , whereas the charge capacity of pristine MoS 2 quickly decays to 60 mAh g −1 after 35 cycles at the same current density. In addition, the important role of pseudocapacitive behavior in the high rate sodium storage performances of NMF is investigated by kinetics calculation. The band structure and partial density of states of NMF are calculated in order to further explore the change of electronic structure induced by N atom doping in MoS 2 and its correlation with high rate performance. Furthermore, a Na + full-cell with NMF anode and Na 3 V 2 (PO4) 3 cathode is assembled and successfully powered a 2 V light-emitting diode lamp.
研究领域:
材料科学
·
电化学
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Micro & Nano Letters
·
2019
·Vol. 14
·期 5
·493-495
·
IF 0.975
Qinghua Yang,Chunni Xiao,Bingbing Chen,Lin Ma,Limei Xu
MoS 2 hierarchical nanoflowers are fabricated through a gelatin-assisted hydrothermal route. The obtained MoS 2 products are characterised by X-ray powder diffraction, scanning electronic microscopy, transmission electronic microscopy and X-ray photoelectron spectra. It is indicated that MoS 2 nanoflowers (MoS 2 NFs) are assembled by nanosheets as building blocks and gelatin plays a crucial role in the formation of these novel structures. Moreover, MoS 2 NF electrode exhibits an enhanced capacitive property because of its unique microstructure.
研究领域:
材料科学
·
纳米技术
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Jingwen Tan,Junjie Shao,Yanghao Shi,Wenbiao Zhang,Qingsheng Gao
As a promising route to hydrogenate organic compounds at ambient conditions, electrocatalytic hydrogenation (ECH) urgently demands noble-metal-free electrocatalysts with satisfactory activity and selectivity. Here, molybdenum disulfide intercalated by dimethylamine (MoS2-DMA) demonstrates its superiority associated with the engineered interlayer chemistry in the ECH of nitroarenes to anilines. The in situ intercalation by DMA cations leads to the phase transition from semiconducting 2H to metallic 1T and the formation of abundant sulfur vacancies, which is beneficial for activating nitro groups and stabilizing chemisorbed H intermediate toward fast hydrogenation. In a wide potential range of −0.08 to −0.48 V (vs reversible hydrogen electrode (RHE)), MoS2-DMA affords the excellent ECH performance of p-nitrostyrene to p-aminostyrene with high Faradic efficiency (>90%), yield (>90%), and selectivity (>99%), outperforming typical MoS2. The good efficiency of such intercalated MoS2 within a broad substrate scope further verifies the promise of interlayer engineering for exploiting cost-efficient catalysts in an electrochemical refinery.
研究领域:
电化学
·
催化
·
材料科学
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Science Advances
·
2026
·Vol. 12
·期 31
·
IF 13.9
Yangkun Zhang,Xudan Zhang,Xuhui Wang,Xiuzhen Li,Zhiheng Huang,Jingwei Dong,Zitian Pan,Jundong Zhu,Aomiao Zhi,Jiaojiao Zhao,Kunshan Ji,Fankun Wang,Wei Yang,Hua Yu,Xuedong Bai,Na Li,Dongxia Shi,Gang Wang,Shixuan Du,Jinbo Pan,Luojun Du,Guangyu Zhang
Regarding thin film growth, it has been widely recognized that the film typically follows the surface texture and high sharp steps potentially lead to growth termination and film discontinuity. Here, we demonstrate an abnormality that monolayer MoS 2 grown on C -plane sapphire is able to cross sharp steps up to ∼10 nm in height. Assisted by theoretical simulations, we unveil that the cross-step growth of monolayer MoS 2 results from the competition between its deformation energy cost and adsorption energy gain. Notably, cross-step growth leads to the formation of one-dimensional (1D) ripples on target substrates after transfer, resulting in symmetry breaking and strain engineering to trigger anisotropic properties and boost transistor performances. The room-temperature mobility (on-state current) along the ripple direction is improved by ∼67.6% (∼118.4%) compared to that perpendicular to the ripple direction. Our work showcases an exotic cross-step growth paradigm to create and manipulate 2D materials, promising the prospect for a broad portfolio of emerging electronic, photonic, and optoelectronic applications.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Minghua Li,Deli Xu,Guoxian Wu,Sheng Wang,Hao Cheng,Jianshu He,Kangzhe Yu,Zhihan Liu,Yaqing Zhou,Bingbing Tian
All-solid-state lithium batteries (ASSLBs) have attracted significant attention due to their advantages of high energy density, enhanced safety profile, and potential for cost-effective manufacturing. At the same time, a superior anode that matches the ASSLBs is particularly important. In this work, we demonstrated chemically prelithiated MoS2 as an anode material for ASSLBs, which embeds lithium ions into a MoS2 matrix (LixMoS2) in advance to counteract lithium loss during the cycling. By a combination of LixMoS2, Li6PS5Cl (LPSC), and Li–In alloy, an all-solid-state lithium battery with superior long-term cycling and rate capability has been achieved. The cells exhibited a capacity retention rates of 93.4 and 90.8% after 100 cycles at both 0.2 and 1C, alongside a high specific discharge capacity of 480 mAh g–1 at 1C. Furthermore, when paired with a LiCoO2 (LCO) cathode, the full cell maintained a capacity retention rate of 95% over 300 cycles at 1C, with an average capacity loss of only 0.013 mAh g–1 per cycle. This work offers a feasible strategy for optimizing anode materials within sulfide-based ASSLBs, providing valuable insights for the development of high-performance ASSLBs for practical applications.
研究领域:
材料科学
·
电化学
·
能源存储
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高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Kairui Kuang,Xue Jiang,Chenhui Qian,Zhenming He,Liumei Su,Jialong Zhao,Bingsuo Zou,Zhentao Du
In the present work, the exploration of photoelectrochemical (PEC) photodetectors (PDs) based on Ag-doped ZnO/MoS2 nanorod arrays is reported. Ag-ion doping optimizes the band structure of ZnO, reduces interface defect states, promotes the formation of an internal electric field, and significantly improves the photoelectric performance and stability of ZnO/MoS2 heterojunction PEC PDs. The PD exhibits excellent photodetection behavior, with a high photocurrent density (684.08 μA·cm–2), responsivity (2.207 mA W–1), and detectivity (11.3 × 108 Jones) under white-light illumination with an intensity of 310 mW cm–2 and a bias voltage of 0.6 V, which are approximately 2.7, 2.7, and 4.2 times higher than those of pure ZnO/MoS2, respectively. Furthermore, Ag doping significantly improves the self-powered photoelectric performance of the device, demonstrating excellent photoresponse characteristics under zero bias. This study reveals the mechanism by which Ag-ion doping improves the performance of ZnO/MoS2 photodetectors, providing fundamental support for the development of high-performance photoelectrochemical photodetectors.
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