ACS Applied Energy Materials
·
2023
·
IF 6.4
Qinqin Zhou,Guanlin Lv,Xinyu Wang,Weili Teng,Peng Hu,Yucheng Du,Hongyi Li,Yuxiang Hu,Wenxin Liu,Jinshu Wang
Improving the specific capacitance and energy density of a fiber-shaped supercapacitor (FSSC) is critical to its applications as an energy storage device for advanced smart wearable electronics. In this paper, a heterogeneous poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/reduced graphene oxide/molybdenum disulfide (PEDOT:PSS/rGO/MoS2) fiber was prepared to achieve a high-performance and durable electrode for the FSSC. As indicated, pseudocapacitive MoS2 was in situ grown on a highly conductive acid-treated PEDOT:PSS/rGO assembly with a hierarchical structure. This structural design emphasizes the wrinkled morphology and high conductivity of the PEDOT:PSS/rGO backbone to maximize the MoS2 deposition and accelerate its electron transfer, which fully utilizes the pseudocapacitance of MoS2 and provides additional capacitance contribution to the obtained device. Attributed to the synergy, the prepared fiber electrode in the FSSC exhibits high volumetric/areal specific capacitance (325.8 F cm–3/405.3 mF cm–2 at 1 A cm–3 or 1.2 mA cm–2) and excellent rate performance (82%, 1–10 A cm–3). The corresponding device shows an ultrahigh volumetric energy density of 6.9 mW h cm–3 at a high power density of 173.6 mW cm–3 and an areal energy density of 8.5 μW h cm–2 at 215.9 μW cm–2, together with excellent cycle stability and mechanical flexibility, outperforming most of the previously reported FSSCs. Accordingly, the proposed strategy provides a great opportunity to develop a high-performance FSSC for further wearable electronics.
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International Journal of Nanomedicine
·
2023
·
IF 8
Shaohui Zheng,Min Zhang,Hongyan Bai,Meijuan He,Lina Dong,Lulu Cai,Mingming Zhao,Qi Wang,Kai Xu,Jingjing Li
Background Early diagnosis of renal cell carcinoma is extremely significant for the effective treatment of kidney cancer. The development of AS1411 aptamer modified Mn-MoS2 QDs provides a promising fluorescence/magnetic resonance (MR) dual-modal imaging probe for the precise diagnosis of renal clear cell carcinoma.Methods In this work, Mn-MoS2 QDs were synthesized through a simple “bottom-up” one-step hydrothermal method. AS1411 aptamer was modified on the Mn-MoS2 QDs to improve the specificity to renal cell carcinoma. The characteristics of Mn-MoS2 QDs were confirmed by transmission electronic microscopy (TEM), atomic force microscope (AFM), X-ray photoelectron spectrometer (XPS), photoluminescence (PL) emission spectra, etc. Cellular fluorescence labelling was investigated using the Mn-MoS2 QDs and AS1411-Mn-MoS2 QDs. The T1-weighted MR imaging was assessed by the in vitro MR cell imaging and in vivo MR imaging. Finally, the long-term toxicity of Mn-MoS2 QDs was investigated by the hematology and histological analysis.Results The prepared Mn-MoS2 QDs exhibited excellent aqueous property, intense fluorescence, low toxicity, high quantum yield of 41.45% and high T1 relaxivity of 16.95 mM−1s−1. After conjugated with AS1411 aptamer, the AS1411-Mn-MoS2 QDs could specifically fluorescently label the renal carcinoma cells and present a specific MRI signal enhancement in the tumor region of mice bearing renal carcinoma tumors. Furthermore, Mn-MoS2 QDs revealed low toxicity to the mice via hematology and histological analysis.Conclusion These results demonstrated the potential of AS1411-Mn-MoS2 QD as a novel nanoprobe for targeted MR imaging and fluorescence labelling of renal cell carcinoma.
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PubMed
高影响因子
IONICS
·
2022
·Vol. 29
·期 3
·917-930
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IF 2.961
Zhong Weixu,Hong Jiabin,Wang Chunxiang,Li Zhifeng,Chen Jun,Dmytro Sydorov
Nano-MoS 2 and MoS 2 /graphene nanocomposites are prepared by a simple xylitol auxiliary ball milling method. Xylitol can increase the shear force in the ball milling process and overcome the interlayer van der Waals force between MoS 2 and the graphite layer, thus improving the efficiency of preparing nanomaterials by ball milling method. As a result, the MoS 2 /graphene hybrid nanosheets exhibit higher discharge capacity and better cycle stability as lithium-ion anode materials. When the original addition amount of MoS 2 and graphite is 1:1, the materials have the best electrochemical behaviors. The initial discharge capacity is as high as 1014 mAh·g −1 at a current density of 50 mA·g −1 , after 300 cycles at a current density of 250 mA·g −1 , the capacity remains at 664 mAh·g −1 without decay. Therefore, the xylitol auxiliary ball milling method is suitable for the scalable preparation of new transition metal sulfide (TMDS)-based anodes for lithium-ion batteries.
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APPLIED CLAY SCIENCE
·
2023
·
IF 5.6
Wufei Tang,Haizhou Fan,Fang Liu,Yunhui Liao,Qi Xiao,Jiao Yan,Sheng Zhang,Xiaoyu Gu
By growing molybdenum disulfide (MoS 2 ) on the surface of acidified kaolinite (A-Kaol) to obtain MoS 2 @A-Kaol compounds, which effectively suppressed the toxic smoke and soot, enhanced thermal stability and ageing resistance of the epoxy resin (EP). In the cone calorimetry test, the total smoke production (TSP) reached 3917.6 m 2 ; while the TSP value decreased to 2575.5 m 2 after adding 3 wt% MoS 2 @A-Kaol; MoS 2 @A-Kaol slowed down the mass loss and promoted the char residue of EP composite increased to 11.3%. In TGA test, the temperature of 50% mass loss (T 50% ) was postponed from 388 °C to 414 °C and the residue increased to 8.7% after adding 3 wt% MoS 2 @A-Kaol, indicating the thermal degradation of the EP was postponed and its thermal stability was improved. The released smoke and soot were filtrated by a non-woven PP fabric, which documented MoS 2 @A-Kaol reduced the toxic aromatic volatiles. The tensile and impact strength of the EP was mostly kept by 3 wt% MoS 2 @A-Kaol after UV ageing for 72 h. Based on all the results, the smoke suppression and anti-ageing mechanism was disclosed. This work provided a feasible solution to improve the comprehensive properties of EP with low amount of filler.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Liangri Ying,Fei Liang,Zhen Huang,Jing Ding,Weilong Wang,Shule Liu,Jianfeng Lu
Solar-driven steam generation is widely considered as a promising strategy for desalination. However, before this technology can be practically implemented, certain challenges such as suboptimal steam generation rates and inevitable salt deposition need to be addressed. In this study, we propose a novel bilayer structure aerogel (MS-aerogel), which confines urchin-like MoS 2 /Mo 5 N 6 /C in a biomass gelatin substrate to achieve high-efficiency desalination in high concentration brine solutions. The urchin-like MoS 2 /Mo 5 N 6 /C that hybrid semiconductor MoS 2 , plasmonic Mo 5 N 6 and porous carbon performs superior light-to-heat conversion performance to its individual components. Additionally, under the collaborative action of hydrophilic groups and unique nanostructured surface, the MoS 2 /Mo 5 N 6 /C exhibits a notable reduction in interface evaporation enthalpy from 2405.8 to 1694.6 J g −1 . Taking into consideration the comprehensive thermal management performance, the self-floating MS-aerogel achieves an excellent evaporation rate of 1.89 kg m -2 h −1 under one sun irradiation. Furthermore, the vertically aligned vessels present in the MS-aerogel facilitate salt transportation, effectively preventing crystalline salt accumulation on the evaporator surface. Consequently, even after continuous 12 h desalination in 20 wt% brine, the MS-aerogel maintains an outstanding evaporation rate of 1.54 kg m -2 h −1 , surpassing most reported self-floating evaporators. This research offers a valuable reference for the design of high-efficiency and salt-resistant solar evaporators.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Juan Zhang,Yulong Ma,Yonggang Sun,Lei Wang,Liqiong Wang,Zhen Wang,Bolong Zhao,Jingdan Gao,Min Xu
The application of heterogeneous advanced oxidation processes (AOPs) in the removal of refractory pollutants has been hindered by several drawbacks, such as difficult recovery of the powder catalyst, the low yields and inefficient utilization of reactive oxygen species (ROS). We developed a novel catalytic membrane named 2D CoO@MoS 2 membrane, its catalytic active layer was a composite material formed by MoS 2 nanosheets wrapped and intercalated between 2D CoO porous nanoplates, providing abundant active sites and oxygen vacancies (O v ). 2D CoO@MoS 2 membrane was applied to activate peroxymonosulfate (PMS) for benzotriazole (BTA) degradation. DFT calculations and series characterizations demonstrated that electron transfer occurred at the contact interface between 2D CoO and MoS 2 phase, while the 2D CoO@MoS 2 composite could act as an effective electron donor for PMS. The redox cycles of Mo(IV)/ Mo(VI) and O v /O 2− could synergistically enhance the regeneration of Co(II), thereby maintaining the cycle of catalytic active center, which facilitated the spontaneous dissociation of PMS to generate various ROS, including SO 4 − (30.2 μM), 1 O 2 (8.6 μM) and OH (5.8 μM). These ROS rapidly degraded 99.7% of BTA (20 mg/L) through the nanoconfined layer of hydrophilic membrane with an ultra-high flux of 2172 L m −2 h −1 in a super-fast time (∼195 ms). Surprisingly, the degradation rate constant k exhibited 3 to 5 orders of magnitude higher compared to conventional heterogeneous AOPs. Furthermore, the catalytic stability, degradation pathways and biological toxicity of BTA degradation were also evaluated. This membrane-based AOPs technique provides a new approach to overcome the limitations of conventional heterogeneous catalysis.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 17
·1-12
·
IF 2.8
Ramya A. Janaki,Shobanadevi N.,Mangaiyarkarasi S. P.,Sankar R.
Promoting the charge separation to improve photocatalytic performance of semiconductor photocatalysts is very important in the field of artificial photosynthesis. Here, a novel MoS 2 /CdS 2D–2D ultrathin nanosheet heterostructure was fabricated via a one-pot solvothermal route. The obtained 2D–2D MoS 2 /CdS nanojunction has not only provided large contact areas, but also shortened the charge-transport distance, resulting in significantly enhanced photocatalytic H 2 evolution property. By optimizing the 2D MoS 2 amounts in the heterojunction, the 5 wt% 2D/2D MoS 2 /CdS heterojunction displayed the maximal photocatalytic H 2 evolution rate of 5566 μmolh −1 g −1 under visible-light irradiation in the presence of lactic acid as the sacrificial reagent, which was 10.1 times higher than that of pristine 2D CdS (516 μmolh −1 g −1 ). Based on the photoelectrochemical and photoluminescence spectra tests, it could be deduced that the charge separation and transfer of 2D/2D MoS 2 /CdS heterojunction were tremendously improved, and the recombination of photoinduced electron–hole pairs was effectively impeded. Moreover, the 2D MoS 2 was used as a co-catalyst to provide the abundant active sites and lower the overpotential for H 2 generation reaction. The current work would offer an insight to fabricate the 2D/2D heterojunction photocatalysts for splitting H 2 O into H 2 .
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ChemistrySelect
·
2022
·Vol. 7
·期 33
·e202201722
·
IF 2.307
Jiameng Wang,Baohua Chen,Wuyi Zhang,Yifeng Wu,Lanlan Chen,Jia Wen,Hongyuan Yan
Graphical The properties of MoS 2 , MoSe 2 and MoTe 2 on the glucose sensing were systemically explored and compared. The three kinds of exfoliated TMDs modified electrodes possessed a low detection limit, an outstanding specificity and acceptable specificity. Two-dimensional transition-metal dichalcogenides (TMDs) have attracted widespread interests owing to their attractive physical and chemical properties. In particular, they are especially attractive in the field of electrochemical biosensors. In this study, the properties of TMDs ((molybdenum sulfide (MoS 2 ), molybdenum diselenide (MoSe 2 ) and molybdenum telluride (MoTe 2 )) on the glucose sensing were explored and compared. Exfoliated MoS 2 , MoSe 2 and MoTe 2 nanosheets with basically the same size were fabricated through controlling the ultrasonic power. The structure and morphological characteristics of MoS 2 , MoSe 2 and MoTe 2 were examined through scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and powder X-ray diffractometer. Electrochemical properties were analyzed through cyclic voltammetry and differential pulse voltammetry. Results showed that all the three kinds of TMDs can enhance the electroconductibility of the electrodes. When incorporated into the construction of electrochemical biosensors for glucose detection, all of the three kinds of exfoliated TMDs modified electrodes possessed achieved analytical requirements of selectivity, wide linear ranges, as well as low limits of detection and quantification. In particular, MoS 2 -based biosensor generated a higher specificity and lower detection limit than that of MoSe 2 and MoTe 2 . This is imperative to showcase the real potential of TMDs in electrochemical biosensors.
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ACS Nano
·
2022
·
IF 18.027
Lijie Han,Jie Luo,Rongkang Zhang,Wenbin Gong,Long Chen,Fan Liu,Ying Ling,Yihao Dong,Zhenzhong Yong,Yongyi Zhang,Lei Wei,Xiaogang Zhang,Qichong Zhang,Qingwen Li
Nonmetallic ammonium ions that feature high safety, low molar mass, and small hydrated radius properties have shown great advantages in wearable aqueous supercapacitors. The construction of high-energy-density flexible ammonium-ion asymmetric supercapacitors (AASCs) is promising but still challenging due to the lack of high-capacitance pseudocapacitive anodes. Herein, freestanding core–shell heterostructures supported on carbon nanotube fibers were designed by anchoring MoS2 nanosheets on nanowires (MoS2@TiN/CNTF) as anodes for AASCs. With contributions of abundant active sites and conspicuous synergistic effects of multiple components for arrayed heterostructure engineering, the developed MoS2@TiN/CNTF anodes exhibit a specific capacitance of 1102.5 mF cm–2 at 2 mA cm–2. Theoretical calculations confirm the dramatic enhancement of the binding strength of ammonium ions on the MoS2 shell layer at the heterostructure, where a built-in electric field exists to accelerate the charge transfer. By utilizing a MnO2/CNTF cathode and NH4Cl/poly(vinyl alcohol) (PVA) as a gel electrolyte, quasi-solid-state fiber-shaped AASCs were successfully constructed, achieving a specific capacitance of 351.2 mF cm–2 and an energy density of 195.1 μWh cm–2, outperforming most recently reported fiber-shaped supercapacitors. This work provides a promising strategy to rationally design heterostructure engineering of MoS2@TiN nanoarrays toward advanced anodes for application in next-generation AASCs.
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高影响因子
Particuology
·
2022
·
IF 3.251
Chao Song,Yuhua Liu,Chengxiang Huang,Miao Liu,Nailin Yue,Zunhao Zhang,Zizhun Wang,Xu Zou,Wei Zhang,Weitao Zheng
Through inverted-design rather than modifying the generally-assumed S active sites in popular MoS 2 , we unlock the potential of Mo sites and successfully prepared novel MoS 2 @Ni 3 S 2 /NF core-shell nanospheres as a catalyst for the high-performance hydrogen evolution reaction (HER). The ΔG H at the Mo site is optimized via Ni 3 S 2 to achieve excellent HER activity. At low current densities, it has similar activity to the Pt/C. However, its performance is better than Pt/C at high density. Moreover, our catalyst shows a considerable stability at a variety of current densities for 50 h, promising to substitute noble metal catalysts in application of commercial alkaline electrocatalysts .
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高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Wei Ma,Binghua Yao,Wen Zhang,Yinglong Chen
In this manuscript, hierarchical MoS 2 nanotubes (NTs) with different aspect ratio (length/diameter) were successfully synthesized via one-step solvothermal method for piezocatalytic applications. SEM indicated that the constructed MoS 2 NTs-13 had perfect uniformity while TEM demonstrated the hollow interior. Such hierarchical tubular structures consisting of cross-linked MoS 2 single-/few-layered nanosheets featured large specific surface area (85.83 m 2 g −1 ) and high porosity. The MoS 2 NTs-13 with high aspect ratio exhibited the optimum piezocatalytic performance, achieving 93.26% degradation efficiency for sulfamethazine (SMZ, 20 mg/L) within 10 min, leading to a high first-order rate constant of 0.2486 min −1 , which was 2.48 times higher than that of MoS 2 NTs-10. Piezoelectrochemical measurements suggested that MoS 2 NTs-13 displayed stronger piezoelectric current response and lower charge transfer resistance. The radical trapping experiments and electron spin resonance analysis confirmed that hydroxyl radicals ( OH) and superoxide radicals ( O 2 – ) were the main reactive oxygen species (ROS) for SMZ degradation. Furthermore, six degradation intermediates of SMZ were identified and two possible degradation pathways were proposed. This work provides design strategies for optimizing structural stability of ultrathin two-dimensional nanomaterials, and offers a highly efficient method for typical antibiotics removal.
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高影响因子
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
·
2022
·
IF 0.847
Zhaoyang An,Hui Xue,Jing Sun,Niankun Guo,Tianshan Song,Jiawen Sun,Yi-Ru Hao,Qin Wang
Integrating the advantages of anion vacancies and heterostructures into the catalytic materials may increase the binding affinities to intermediates, provide more active sites, and significantly promote the activity of overall water splitting. However, the successful assembly of anion vacancies and heterostructures for high-efficiency water splitting performance is still challenging. In this work, we ingeniously present the co-construction of sulfur vacancies and heterogeneous interface into Ni 3 S 2 /MoS 2 catalysts on nickel foam (NF). The introduction of sulfur vacancies and Ni 3 S 2 /MoS 2 heterostructures can significantly improve electron and ion transport, effectively improve structural stability, and enhance overall water splitting activity. The obtained V S -Ni 3 S 2 /MoS 2 catalysts (V S stands for sulfur vacancies) exhibit superior OER and HER activities, and the overpotentials for OER and HER are 180 and 71 mV at 10 mA·cm −2 , respectively. Furthermore, a low water splitting voltage of 1.46 V is required at 10 mA·cm −2 for the V S -Ni 3 S 2 /MoS 2 catalysts, which is considerably lower than most that of water splitting electrocatalysts currently reported. This work offers an effective mean for the preparation of catalysts with both anion vacancies and heterostructures for achieving high-performance alkaline overall water splitting.
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危险品化学品经营许可证（带存储）