CARBOHYDRATE POLYMERS
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2017
·
IF 4.811
Xiancai Jiang,Yujun Sun,Hongxiang Zhang,Linxi Hou
In this study, a series of novel quaternized poly(vinyl alcohol)/chitosan/molybdenum disulfide (QPVA/CS/MoS 2 ) anion exchange membranes (AEMs) were prepared for direct methanol alkaline fuel cell (DMAFC). The composite membrane was synthesized by adding different amounts of MoS 2 nanosheets (0, 0.1, 0.2, 0.5 and 1 wt%) into QPVA/CS mixture solution and using the solution casting method. The crystallinity, thermal and mechanical properties, ion conductivity and resistance to methanol of the QPVA/CS/MoS 2 membranes were characterized by X-ray diffraction, thermogravimetric analysis, tensile testing, ion exchange capacity, and methanol permeability measurements, respectively. The MoS 2 was homogeneously dispersed in the membranes. The mechanical strength of the composite membranes was enhanced with the addition of MoS 2 . With the addition of 1.0 wt% MoS 2 , the QPVA/CS/MoS 2 composite membrane has the lowest methanol permeability of 0.210 × 10 −7 cm 2 ·s −1 . This study confirmed that the novel QPVA/CS/MoS 2 membrane would be a potential candidate for the application in DMAFCs.
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高影响因子
SYNTHETIC METALS
·
2016
·
IF 2.299
Gang Fu,Li Ma,Mengyu Gan,Xiuling Zhang,Meng Jin,Yao Lei,Peishu Yang,Maofa Yan
This research paper describes a facile strategy to synthesize the novel 3D Spongia-shaped polyaniline/MoS 2 nanospheres composite under the addition of polyvinylpyrrolidone (PVP) (named sPANI/A-MoS 2 ), and this composite displays excellent electrochemical properties as an electrode material for supercapacitors. The structure and morphology of the as-prepared 3D sPANI/A-MoS 2 are characterized by scanning electron microscopy (SEM), Fouriertransform infrared (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS), Raman spectroscopy measurements and Thermogravimetric Analysis (TGA). Cyclic voltammograms (CV) and galvanostatic charging/discharging (GCD) tests are adopted to evaluate the electrochemical performances of the composite. All the results powerfully demonstrate the successful fabrication of 3D sPANI/A-MoS 2 . The maximum specific capacitance of this composite reaches up to 605 F g −1 at a current density of 1 A g −1 , and the energy density of 53.78 Wh kg −1 is obtained at a power density of 0.4 kW kg −1 . Notably, the capacity retention of the as-fabricated sPANI/A-MoS 2 composite electrode can maintain 88.6% (well above 59.8% for sPANI) after constant charge-discharge 1000 cycles, showing an excellent electrochemical stability.
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Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 31
·16337-16347
·
IF 7.443
Shengjie Xu,Zhouyue Lei,Peiyi Wu
In this paper, 3D porous MoS2/MoSe2 nanosheet–graphene networks were successfully prepared by a simple mixing solvothermal treatment. The resulting products possessed highly conductive graphene networks on which highly exfoliated MoS2/MoSe2 nanosheets were decorated. This hybrid 3D architecture facilitated loading of 2D nanosheets (including some 0D quantum dots), exposure of active sites, and improvement of electron transfer between the electrode and the catalysts. The highly exfoliated and defect-rich structure of MoS2/MoSe2 nanosheets endowed these composites with plentiful active sites for the electrocatalysis of the hydrogen evolution reaction (HER). The MoSe2 sample exhibited remarkable activity for the HER with a very small overpotential of approximately 70 mV and a low Tafel slope of 61 mV per dec, as well as excellent long-term durability. Moreover, due to the facile and relatively low-cost preparation method, our work might develop promising candidates for Pt-free HER catalysts for future commercial applications and provide an alternative facile approach to fabricate other layered materials confined in graphene hybrid 3D networks on a large scale.
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NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 14
·6700-6708
·
IF 3.269
Huimin Zhao,Yaxi Li,Bing Tan,Yaobin Zhang,Xiaochi Chen,Xie Quan
To improve the peroxidase-like activity of molybdenum dichalcogenides (MoS2), surface modification, such as combing with monometallic or bimetallic nanoparticles, is of great and widespread interest. However, only a few studies have been reported on the modification of MoS2 with non-metallic materials. Herein, we report a study on the peroxidase-like activity of novel PEGylated MoS2 (PEG-MoS2) nanosheets prepared using a simple liquid-phase exfoliation and pegylation process. Compared to the undecorated MoS2 nanosheets, PEG-MoS2 nanosheets have improved water dispersiblity and stability, which are beneficial for improving the peroxidase-like activity, as well as the catalysis velocity and affinity for TMB or H2O2. Based on PEGylated MoS2, we successfully established a new platform for the colorimetric detection of H2O2 with a limit of detection (LOD) of 1.18 μM, which is comparable to that of the majority of the reported enzyme mimics of inorganic graphene analogues. More importantly, the as-prepared PEG-MoS2 nanosheets are environmentally friendly, water dispersible, low cytotoxic, and easily prepared, which indicate that PEG-MoS2 is a type of promising enzyme mimics and extremely likely to be applied in cell-based assay systems without any adverse reactions.
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Small
·
2024
·
IF 13
Ning Li,Yong Ma,Jiafeng Ma,Qing Chang,Xiangqian Fan,Lei Liu,Chaorui Xue,Caihong Hao,Huayang Zhang,Shengliang Hu,Shaobin Wang
MoS 2 /ZnIn 2 S 4 flower-like heterostructures into porous carbon (PC@MoS 2 /ZIS) are embedded. This ternary heterostructure demonstrates enhanced light absorption across a broad spectral range from 200 to 2500 nm. It features both Type-II and S-scheme dual heterojunction interfaces, which facilitate the generation, separation, and transfer of photoinduced carriers. The PC enveloped by MoS 2 /ZIS composite microspheres serves as a photothermal source, providing additional energy to the carriers. This process accelerates charge separation and migration, enhancing photothermal-assisted photocatalytic H 2 evolution. The optimal H 2 evolution rate for PC@MoS 2 /ZIS reaches an impressive 18.79 mmol g −1 h −1 , with an apparent quantum efficiency of 14.1% at 400 nm. This work presents a promising approach for effectively integrating multicomponent heterostructures with photothermal effects, offering innovative strategies for efficient solar energy utilization and conversion.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 11
·1-15
·
IF 5.3
Zhang Shiyu,Chen Xin,Hu Shuai,Cai Ke,Peng Chenxi,Luo Lixia,Gu Yingying,Mei Yong
An electrochemical biosensor was created to identify the liver cancer marker alpha-fetoprotein (AFP) by employing nanocomposite materials. A combination of reduced graphene oxide (rGO) and molybdenum disulfide (MoS 2 ) was selected as the substrate material for the sensor to prepare the PtNPs/MoS 2 @rGO electrochemical immunosensor. Among them, rGO has strong conductivity and MoS 2 provides a large surface area for the anchoring of PtNPs for better attachment to the hybridized nanomaterials. Meanwhile, PtNPs exhibit consistent biocompatibility and excellent electrocatalytic activity. PtNPs also attach to hybrid nanomaterials and bind the antibody via the Pt–S bond, thereby furnishing the antibody with multiple binding sites for enhanced antibody adhesion. The immunosensor achieved ultra-sensitive AFP detection by exploiting the specific antigen–antibody binding. The structure and morphology of the PtNPs/MoS 2 @rGO composites were investigated by transmission electron microscopy (TEM), energy dispersive X-ray (EDS) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy, and the sensor was electrochemically characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Under optimized conditions, using differential pulse voltammetry the biosensor detected AFP in serum within a linear range of 1 ~ 10 5 pg/mL, with a correlation coefficient ( r 2 ) of 0.9989, and a detection limit of 0.12 pg/mL ( S / N = 3). The method offers a new approach for the ultrasensitive detection of serum AFP and is extremely selective, accurate, and precise with a relative standard deviation (RSD) of less than 6%. It has been successfully applied to the analysis of real human blood samples. Graphical
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Wantao Li,Yunlan Xu,Dengjie Zhong,Danli Tang,Tanxia Xiang,Chunmiao Fan,Yuanfang Yang
In this study, CoFe2O4 anchored by MoS2 modified biochar (CoFe2O4@MoS2–BC) was synthesized using a hydrothermal approach and utilized to activate peroxymonosulfate (PMS) to degrade rhodamine B (RhB). The effects of pH value, catalyst and PMS dosage, RhB concentration, and coexisting compounds were systematically investigated. Within 7 min, CoFe2O4@MoS2–BC achieved a removal rate of 99.63% for 100 mg·L–1 RhB. The outstanding stability and environmental compatibility of CoFe2O4@MoS2–BC was verified by cycling and metal ion leaching experiments. The contribution of 1O2, SO4•–, •OH, and •O2– in the degradation procedure was revealed by quenching experiments, among which 1O2 was the predominant active species. Electrochemical characterization indicated that CoFe2O4@MoS2–BC exhibited enhanced current density, redox activity, and superior electron transfer capability. Comprehensive characterization analysis and experimental data revealed that the high efficiency of CoFe2O4@MoS2–BC was attributed to Co2+/Co3+, Fe2+/Fe3+, and Mo4+/Mo6+ redox cycling on the CoFe2O4@MoS2–BC surface. The cycles of Co2+/Co3+ and Fe2+/Fe3+ were enhanced by Mo, while unsaturated S increased the reactivity of Mo, thereby accelerating the redox of metal ions; oxygen vacancies (Ov) enhance the mobility of surrounding oxygen ions mobility and promoted the conversion from lattice oxygen (Olat) to reactive oxygen species (O*), thereby activating PMS effectively. This research is expected to provide innovative insights that will inform the design and development of excellent activity and stability of heterogeneous metal-based catalysts.
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ACS Applied Energy Materials
·
2024
·
IF 5.4
Dan Han,Wei Mo,Ning Yang,Lei Zuo,Qinghua Sun,Xianghua Zeng
Two-dimensional Bi2S3 is considered a better photocatalyst when combined with CdS. To deeply understand electronic structures between CdS and Bi2S3, CdS@Bi2S3 core–shell nanorods (NRs) were synthesized with a two-step hydrothermal method, and CdS@Bi2S3–MoS2 composites were obtained with MoS2 nanoparticles decorated on the surface of CdS@Bi2S3 NRs. Then, the energy band alignments in CdS@Bi2S3–MoS2 were constructed from XPS and UPS measurements, and dual z-scheme CdS@Bi2S3–MoS2 heterostructures were confirmed from charge transfer with electron spin resonance (ESR) signals of •O2– and •OH. Finally, the photocatalytic hydrogen activities were carried out with the prepared samples. The results showed that the optimized CdS@Bi2S3 core–shell NRs have a hydrogen production rate of 4.29 mmol·h–1·g–1, which is 8.4 times higher than that of the pure CdS nanorods, and the optimized CdS@Bi2S3–MoS2 heterostructure has a hydrogen production rate of 8.72 mmol·h–1·g–1, which is 17 times higher than that of the pure CdS NRs. The enhanced photocatalytic activity can be ascribed to the dual z-scheme heterostructure and full-spectrum absorption; the former is favorable for the efficient separation of the photogenerated electron–hole pairs, and the latter is beneficial to the production of more photogenerated carriers. The studies will be helpful to understand the electronic structures of Bi2S3 and the related heterostructures.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jia Zhang,Jiliang Ma,Rui Cui,Weikang Ling,Min Hong,Runcang Sun
Promoting interfacial separation and charge transfer within S-scheme heterojunctions is crucial for effectively enhancing photocatalytic H 2 production. Here, we have successfully synthesized flower-shaped CoP@MoS 2 -x S-scheme heterojunction photocatalysts through a straightforward thermal annealing and hydrothermal process. These photocatalysts demonstrated exceptional performance in H 2 generation assisted by biorefinery. The optimal CoP@MoS 2 -2 photocatalyst achieved an H 2 evolution rate of 4339.39 μmol g −1 h −1 , which is 8 and 5.5 folds of individual CoP and MoS 2 , respectively. Meanwhile, the system was accompanied by 81.0 % yield of lactic acid, which is higher than those of CoP and MoS 2 . The enhanced photocatalytic performance of CoP@MoS 2 -x heterojunctions stems primarily from their unique S-scheme charge carrier transport mechanism. This S-scheme heterojunction structure not only boosts the separation efficiency of photogenerated electron-hole pairs but also preserves a robust photocatalytic redox capacity. This study provides a new avenue for designing efficient photocatalysts of H 2 generation assisted by biomass oxidation.
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Progress in Natural Science-Materials International
·
2025
·
IF 7.1
Jie Li,Zhangyue Zheng,Yuehong Huang,Liu He,Hongying Guo,Chunzheng Wu,Wei Liu,Weiwei Huan
The serious problems caused by water contamination call for efficient treatment. The catalytic reduction of 4-nitrophenol (4-NP) by NaBH 4 in solution is a convenient way to convert 4-NP to 4-aminophenol (4-AP), which is a precious intermediate for manufacturing of important materials such as pharmaceuticals. In the present study, the Co modified MoS 2 supported Au nanoparticles (Au/Co-MoS 2 ) is proved to be an efficient catalyst for the reduction of 4-NP. With the introduction of cobalt, the catalytic activity is improved obviously compared to Au/MoS 2 . When Co:Mo is 2:8 (mol), the Au/CoMoS 2 (2/8) catalyst exhibits the highest activity. The kinetics of the catalytic reactions were studied by the plot of ln(C t /C 0 ) against reaction time and the k app for Au/CoMoS 2 (2/8) is 1.063 min −1 . The characterization of the catalysts shows that the addition of cobalt can create more crystal defects, promote the exposure of active edge sites, facilitate the surface of catalysts to be more reactive.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Weijin Li,Junhui Hu,Qiaoling Shao,Tao Tang,Junjie Huo,Jian Sun,Kang Dai
Currently, the development of high-performance adsorbents for the removal of nanoplastics in complex aquatic environments is challenging. In this study, a functionalized polyethyleneimine-phosphorylated microcrystalline cellulose/MoS 2 (PEI-PMCC/MoS 2 ) hybrid aerogel was prepared and applied to remove carboxyl-modified polystyrene (PS-COOH) nanoplastics from the aqueous solution. Benefiting from the introduced functional groups and the expanded lamellar structure in MoS 2 nanosheets as well as the highly porous 3D structure of the aerogel, PEI-PMCC/MoS 2 demonstrated high efficiency in PS-COOH nanoplastics removal, achieving a 402.4 ± 7.5 mg/g maximum adsorption capacity at the optimal adsorption pH of 7.0 (C 0 = 300 mg/L). The adsorption isotherm and kinetics data fitted well with the Langmuir and pseudo-second-order models, respectively, suggesting that the removal of PS-COOH nanoplastics was dominated by the monolayer chemisorption process, and the thermodynamic studies revealed the exothermic nature of the spontaneous adsorption process. Furthermore, the adsorption performance of PEI-PMCC/MoS 2 in different complex aqueous environments, as well as its reusability, was evaluated, and the interactions between PEI-PMCC/MoS 2 and PS-COOH nanoplastics were analyzed to elaborate the adsorption mechanism. These results confirmed the high nanoplastics removal efficiency and favorable reusability in PEI-PMCC/MoS 2 , laying a solid foundation for developing high-performance adsorbents for nanoplastics removal.
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高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 48
·2412844
·
IF 27.4
Xinyi Zhang,Linyu Hu,Kemeng Zhou,Linqing Zhang,Xiaolong Zeng,Yuqing Shi,Weizheng Cai,Jiazhen Wu,Yuanjing Lin
Aqueous zinc-ion batteries with superior operational safety have great promise to serve as wearable energy storage devices. However, the poor cycling stability and low output voltage limited their practical applications. Here, fully printable Zn/MoS 2 -MnO 2 micro-batteries are developed and demonstrated significantly enhanced cycling stability with sweat activation. 2D MoS 2 is utilized to enable lattice-matching with Zn powders to realize printed Zn anodes with desirable stability and promote electron/ion transfer. Interestingly, the mild acid epidermal sweat also contributed to eliminating the MnO 2 cathode by-products and compensating for the hydrogel electrolytes' water loss. The Zn/MoS 2 -MnO 2 micro-batteries achieve a high specific capacity of 318.9 µAh cm −2 at the current density of 0.16 mA cm −2 , and an energy density of 424.6 µWh cm −2 , with remarkable cycle stability of ≈90% after 250 cycles. In-battery electrochromic display of capacity level and feasible electronics charging are demonstrated. The as-printed micro-batteries with innovative sweat activation would inspire the advances of sustainable power supply for wearables.
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危险品化学品经营许可证（带存储）