ACS Applied Nano Materials
·
2021
·
IF 5.097
Peng Yang,Haifeng Yang,Zhengyuan Wu,Fuyou Liao,Xiaojiao Guo,Jianan Deng,Qiang Xu,Haomin Wang,Junjie Sun,Fei Chen,Wenzhong Bao,Laigui Hu,Zhongkai Liu,Yulin Chen,Zhi-Jun Qiu,Zhilai Fang,Ran Liu,Chunxiao Cong
Van der Waals heterostructures composed of atomically thin two-dimensional (2D) materials and three-dimensional (3D) materials provide a multidimensional material integration strategy, which combines materials with different characteristics leading to a wider degree of freedom than a single component, and offer a way for developing electronic and optoelectronic devices with multifunctionalities, such as high-frequency electronic devices, photodetectors, valley-spin electronic devices, and so on. This report demonstrates the direct growth of large-area monolayer MoS2 single-crystal nanosheets with a side length of more than 100 μm on 3D GaN substrates by the perylene-3,4,9,10-tetracarboxylic acid tetrapotassium salt (PTAS) seed-assisted chemical vapor deposition (CVD) method. The seeding promoters changed the growth kinetics of MoS2 on the GaN substrate, which is different from the previously reported epitaxial growth behavior. The size of our synthesized single-crystal MoS2 nanosheets is 2 orders of magnitude larger than the reported epitaxially grown MoS2 on the GaN substrate. Meanwhile, the as-synthesized MoS2 by the seed-assisted CVD method has comparable crystal quality as that of the reported epitaxially grown MoS2 on the GaN substrate. Moreover, detailed characterizations indicate that noticeable charge transfer occurs between MoS2 and the GaN substrate, which suggests that the MoS2/GaN heterostructure has great potential applications in the field of light-emitting diodes (LED) and valley-spin electronic devices.
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高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 20
·1956-1962
·
IF 3.532
Zhilian Cui,Dujuan Li,Weihuang Yang,Kai Fan,Hongying Liu,Fei Wen,Lili Li,Linxi Dong,Gaofeng Wang,Wei Wu
An electrochemical biosensor based on few-layer molybdenum disulfide (MoS2) nanosheets was fabricated for the highly sensitive detection of tumor marker circulating tumor DNA (ctDNA) in this paper. The MoS2 nanosheets with few layers were prepared by the shear stripping. Compared with the mechanical stripping method and the lithium ion intercalation method, this method is simpler to operate, and the prepared MoS2 nanosheets had good electrochemical activity. The biosensing platform was fabricated based on the discriminative affinity of MoS2 nanosheets towards single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA). Methylene blue (MB) was used as the signal molecule. The results showed that the detection of ctDNA by this sensor showed an excellent linear relationship in the concentration range of 1.0 × 10−7 M to 1.0 × 10−16 M, and the detection limit was 2.5 × 10−18 M. In addition, this sensor exhibited outstanding stability and specificity. This strategy provides an alternative approach for ctDNA detection and an effective sensing strategy for future in vitro cancer diagnosis by label-free detection.
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高影响因子
Journal of Physical Chemistry C
·
2023
·
IF 3.7
Yong Yang,Shenman Yao,Wufei Gong,Yan Liang,Ting Yu,Cailei Yuan
Light excitation has been developed as an economical way to realize room-temperature gas sensing recently. However, the high recombination rate of photogenerated carriers in semiconductor gas sensing materials leads to very limited carriers that can effectively take part in sensing reactions, which greatly restricts the further performance improvement of gas sensing under light excitation. Here, a hierarchical Z-scheme heterostructure microsphere of MoS2/SnO2 is designed and prepared. The heterostructure demonstrates an outstanding NO2 sensing performance at room temperature with the excitation of a low-power LED light (0.06 W), which exhibits an ultrahigh sensitivity of 264.2 to 10 ppm of NO2 along with acceptable response/recovery properties. The physical mechanism of NO2 sensing is analyzed. The results suggest that the construction of the Z-scheme heterostructure between MoS2 and SnO2 can greatly promote the separation of photogenerated carriers so that more photogenerated carriers can take part in the NO2 sensing reaction. Furthermore, the designing of a hierarchically porous structure can provide abundant active sites for gas sensing reactions. The work not only expands the development of Z-scheme heterostructures in gas sensing but also provides a strategy to promote the performance of light-excited gas sensors by designing a Z-scheme heterostructure with a hierarchically porous structure.
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Materials Science & Engineering C-Materials for Biological Applications
·
2020
·
IF 5.88
Feng-Yi Wu,Yuan-Sheng Cheng,Dong-Mei Wang,Ming-Ling Li,Wen-Sheng Lu,Xiao-Yong Xu,Xiu-Hong Zhou,Xian-Wen Wei
Nitrogen-doped MoS 2 quantum dots (N-MoS 2 QDs) were synthesized via a facile hydrothermal approach, and exhibited high fluorescence quantum yield (QY, 14.9%), excellent photostability, biocompatibility and water solubility. A novel method with good selectivity and sensitivity was established to assay hematin using N-MoS 2 QDs as a fluorescent probe based on inner filter effect (IFE). Fluorescent quenching of N-MoS 2 QDs has a fine linear dependence with the concentration of hematin in the range of 0.5–15 μmol/L and a limit of detection of 0.32 μmol/L (S/N = 3). By the detection method, average concentration of hematin in real health human erythrocytes was measured as 22.5 ± 3.9 μmol/L. And, recoveries range varied from 94 to 108% through standard recovery experiment. The N-MoS 2 QDs probe shows excellent photostability, low cytotoxicity and anti-interference ability for hematin assay, which may become a promising method for the test of hematin in human blood.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Wei Zhao,Jincheng Liu,Zhongxiang Ding,Jinhong Zhang,Xiaoyu Wang
CdS nanophotocatalysts generally require precious metal Pt as a cocatalyst to enhance photocatalytic hydrogen production performance, but precious metal Pt reserves are scarce and expensive. Therefore, this study hopes to prepare CdS/MoS 2 (CM) composites by uniformly distributing MoS 2 nanosheets on the surface of CdS nanowires by a two-step method. After a series of tests, CM composite can expand the absorption range of visible light and improve the separation and transmittance of photogenerated electrons and holes. The results show the highest hydrogen production rate of 1.79 mmol•g −1 •h −1 was obtained with the CdS/MoS 2 ratio of 0.3, which is 35.8 times that of bare CdS nanowires. The excessive MoS 2 nanosheets will block light adsorption of CdS and inhibit the hydrogen production performance of the CM composite. This study provides a new research direction for finding cheap cocatalysts to replace precious metal Pt.
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高影响因子
Nanomaterials
·
2017
·Vol. 7
·期 10
·303
·
IF 3.553
Haijiao Lu,Jingkang Wang,Hongxun Hao,Ting Wang
With a large specific surface area, high reactivity, and excellent adsorption properties, nano zerovalent iron (nZVI) can degrade a wide variety of contaminants in wastewater. However, aggregation, oxidation, and separation issues greatly impede its wide application. In this study, MoS2/Fe3O4/nZVI nanocomposites were successfully synthesized by a facile step-by-step approach to overcome these problems. MoS2nanosheets (MNs) acted as an efficient support for nZVI and enriched the organic pollutants nearby, leading to an enhanced removal efficiency. Fe3O4nanoparticles (NPs) could not only suppress the agglomeration and restacking of MNs, but also facilitate easy separation and recovery of the nanocomposites. The synergistic effect between MNs and Fe3O4NPs effectively enhanced the reactivity and efficiency of nZVI. In the system, Cr(VI) was reduced to Cr(III) by nZVI in the nanocomposites, and Fe2+produced in the process was combined with H2O2to further remove 4-Chlorophenol (4-CP) through a Fenton reaction. Furthermore, the nanocomposites could be easily separated from wastewater by a magnet and be reused for at least five consecutive runs, revealing good reusability. The results demonstrate that the novel nanocomposites are highly efficient and promising for the simultaneous removal of Cr(VI) and 4-CP in wastewater.Keywords:nZVI;modification;nanocomposites;Cr(VI);4-CP;Fenton reaction;pollution treatment;recyclability;wastewater
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PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 19
·3329
·
IF 5.719
Luogang Xie,Yang Yang,Gaoshang Gong,Shiquan Feng,Dewei Liu
Lead ions in water are harmful to human health and ecosystems because of their high toxicity and nondegradability. It is important to explore effective fluorescence probes for Pb2+detection. In this work, surface-functionalized molybdenum disulfide quantum dots (MoS2QDs) were prepared using a hydrothermal method, and ammonium tetrathiomolybdate and glutathione were used as precursors. The photoluminescence quantum yield of MoS2QDs can be improved to 20.4%, which is higher than that for MoS2QDs reported in current research. The as-prepared MoS2QDs demonstrate high selectivity and sensitivity for Pb2+ions, and the limit of detection is 0.056 μM. The photoluminescence decay dynamics for MoS2QDs in the presence of Pb2+ions in different concentrations indicate that the fluorescence quenching originated from nonradiative electron transfer from excited MoS2QDs to the Pb2+ion. The prepared MoS2QDs have great prospect and are expected to become a good method for lead ion detection.Keywords:molybdenum disulfide;quantum dots;lead ion;fluorescence probe
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高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Yu Rao,Kongjun Zhu,Hongcheng Li,Penghua Liang,Hongjuan Zheng,Jiatao Chen,Jie Zhang,Jinsong Liu,Kang Yan,Jing Wang
Hybrid-structured coupling metal dichalcogenides with carbon materials serve as prospective anode materials for lithium-ion batteries (LIBs) due to their high electrical conductivity, rich active sites, and Li + diffusion path for Li + storage. In the present work, graphene-wrapped ZnS−MoS 2 @carbon composites (ZnS−MoS 2 /rGO@C) are synthesized via high-temperature mixing during the hydrothermal and carbonation processes. The as-prepared ZnS−MoS 2 /rGO@C composites display alleviated volume change in the electrochemical process, increased Li + diffusion speed, and improved conductivity, which are caused by the synergic effect of phase boundaries and hierarchical construction. Therefore, the ZnS−MoS 2 /rGO@C composites show superior lithium storage capacity and structure stability, and possess ultrastable cycle (581.0 mAh g −1 after 500 cycles at 1 A g −1 ) and good rate performance (310.7 mAh g −1 at 5 A g −1 ). This work confirms that anode materials with a hybrid structure can be rationally engineered for high-performance LIBs with superior cycle durability and good rate capability.
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高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Pengpeng Chen,Xiao Liang,Ying Xu,Yifeng Zhou,Wangyan Nie
In this work, MoS 2 nanosheets were employed to reinforce PLA. In order to promote the homogeneous dispersion of MoS 2 in PLA and form a strong interface between MoS 2 and PLA, the MoS 2 nanosheets were firstly modified by mercapto-ethylamine, and then functionalized with PLA chains through ring-opening polymerization of poly( l -lactide). The XRD, XPS, TGA and 1 H NMR characterizations confirmed the successful amino and PLA functionalization of MoS 2 nanosheets. The obtained MoS 2 -g-PLA nanosheets were then introduced to reinforce PLA. SEM images displayed that the MoS 2 -g-PLA nanosheets were dispersed in PLA matrix uniformly. TGA results showed that initial decomposition temperature was improved from 275.6 °C to 334.8 °C with 0.5 wt% of MoS 2 -g-PLA nanosheets. The storage modulus of PLA/MoS 2 -g-PLA-0.5 wt% in the glass state and rubber state were both greatly enhanced compared with neat PLA.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Zongli Liu,Tian Wang,Pu Chang,Lixiu Guan,Xiaohu Wang,Chao Xu,Yingxuan Cao,Junguang Tao
Although electrocatalytic water splitting is a very promising and sustainable method for generating hydrogen as a clean energy source, the design and synthesis of stable and efficient noble metal-free catalysts faces some serious challenges. In this work, an electrocatalyst with heterostructure of MoS 2 and orthogonal phase of CoSe 2 (MoS 2 @o-CoSe 2 ) is derived from Co-based metal organic framework (Co-MOF). The complex shows excellent hydrogen evolution reaction (HER) activity and long-term stability in alkaline medium attributed to its porous structure , ultrathin nanosheet morphology, synergistic effect of each component owing to the tightly bonded interface and optimal electronic structure after phase transition. MoS 2 @o-CoSe 2 exhibits low overpotential of 34 mV at a current density of 10 mA cm −2 and a Tafel slope of 41 mV dec −1 . These results are superior to most recently reported Mo-based and Co-based electrocatalysts. Importantly, the performance of MoS 2 @o-CoSe 2 at high current densities is even better than that of commercial Pt/C electrode. Our results emphasize the importance of phase engineering and show that the combination of MOF with transition metal disulfides is an effective way to develop highly active and sustainable efficient electrocatalysts for water hydrolysis.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xin Xu,Yawen Qiu,Zichen Len,Zongquan Chen,Wenxuan Zhu,Wenqing Zhao,Yue Dai,Liang Cao,Hongbo Geng
Molybdenum disulfide (MoS 2 ) has garnered attention as a promising anode material for sodium-ion batteries due to its high theoretical capacity and unique lamellar texture. Nevertheless, unmodified MoS 2 suffers from inferior electrical conductivity, poor reaction reversibility, and suboptimal cycle life upon repeated sodiation/desodiation. In this study, a novel carbon-free V-heteroatom doping MoS 2 composite ( abbr. VMS) with hierarchical laurustinus-like structure was synthesized by a facile one-step hydrothermal process. Specifically, the rational doping of V-atoms can effectively modulate the intrinsic electronic structure of pure MoS 2 , resulting in enhanced Na-ion diffusion rate, improved reaction kinetics and reduced activation energy compared to bare MoS 2 . Additionally, the hierarchical structure of the VMS composite, with sufficient spacing, effectively mitigates mechanical stress and ensures the integrity of active materials. Consequently, the prepared VMS composite possesses exceptional reaction reversibility (average ICE value of 92 %) and remarkable capacity retention (92.1 % after 450 cycles at 10 A/g). These findings contribute valuable insights into the development of advanced MoS 2 -based anode for sodium ion batteries .
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高影响因子
Chinese Physics B
·
2025
·Vol. 34
·期 11
·117304
·
IF 1.5
Wen Zhang,Mingyang Gao,Jun Guo,Licun Fu,Ling Liu,Jing Wang,Teng Ma
Ultrasound is a powerful tool in materials processing, yet its application in constructing van der Waals (vdW) heterostructures remains under-explored. In this study, MoS2 and graphene — two widely studied 2D materials — were successfully assembled into vdW heterostructures via a convenient ultrasound-driven self-assembly approach. The morphology of the heterostructures was characterized by scanning electron microscopy (SEM), while their structural and compositional features were confirmed through x-ray diffraction (XRD), Raman spectroscopy, and x-ray photoelectron spectroscopy (XPS). Red-shifted Raman peaks and decreased binding energies in XPS spectra provided strong evidence of successful heterostructure formation. A three-stage assembly mechanism — comprising dispersion, assembly, and adjustment — is proposed, with acoustic cavitation playing a key role in driving the process. This study not only demonstrates the feasibility of synthesizing 2D heterostructures via an ultrasonic route but also lays a foundation for future scalable, energy-efficient fabrication strategies.
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