DESALINATION
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2025
·
IF 9.8
Na Yang,Xu Guo,Jing Yu,Hongsen Zhang,Rumin Li,Lele Wang,Qi Liu,Jun Wang
The effective removal of radioactive Sr 2+ and Cs + ions from wastewater is crucial for environmental remediation. Herein, a novel solar-enhanced adsorption platform based on a CoS 2 /MoS 2 /P-MXene/C composite aerogel has been developed that can efficiently remove Sr 2+ and Cs + ions. The constructed CoS 2 /MoS 2 heterointerface provides abundant active regions, while the hierarchical porous structure of the aerogel promotes the rapid transfer of ions and water molecules. In particular, the superior photothermal conversion ability of the CoS 2 /MoS 2 /P-MXene/C makes it capable of capturing solar energy for local heating effect, thereby increasing ion diffusion and accelerating mass transfer. This photothermal feature can greatly enhance the adsorption kinetics through the evaporation of the solution and the ion concentration at adsorption sites. The equilibrium of both Sr 2+ and Cs + was reached within 1 h under one-sun illumination. The measured maximum adsorption capacities were 98.7 and 150.6 mg/g for Sr 2+ and Cs + ions, respectively. In addition, it has excellent selectivity and recyclability as well as high performance in high-salinity solution. The CoS 2 /MoS 2 /P-MXene/C also shows promising potential in the fields of solar-driven seawater desalination and purification of wastewater containing dyes due to the multi-functionality. This work not only engineers an efficient adsorbent for treating nuclear wastewater, but also presents a generic design strategy for multifunctional adsorption system enhanced by external fields for environmental applications.
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ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Luping Feng,Lixiang Zhang,Su Chu,Sheng Zhang,Xi Chen,Yushuang Gong,Zhongling Du,Guojiang Mao,Hua Wang
A nanozyme with 2D/1D heterostructure has been fabricated by the in-situ growth of molybdenum disulfide nanosheets (MoS 2 NSs) onto single-walled carbon nanotubes (SWCNTs). It was discovered that the so-obtained SWCNTs@MoS 2 nanozyme could exhibit greatly improved peroxidase-like catalysis, due to that the formed 2D/1D interfacial coupling in the heterostructure might provide more active sites and exhibit enhanced charge transferring during the catalytic reactions, as confirmed by the X-ray photoelectron spectroscopy, photoluminescence , electrochemical impedance spectra and radical capturing experiments. Furthermore, the catalysis of the developed nanozyme could be selectively inhibited by glutathione (GSH) through the competitive consumption of hydroxyl radicals with enzyme substrate in the catalytic reaction system. A SWCNTs@MoS 2 catalysis-based colorimetric strategy was further proposed for the quantitative analysis of GSH with the concentrations linearly ranging from 0.01 to 1000.0 μM. Besides, the feasibility of the developed colorimetric method was evaluated by monitoring GSH separately in the extractions from hela cells and human serum, promising the extensive applications for monitoring various biological species like GSH in the clinical laboratory. Importantly, such a fabrication route for nanozyme with 2D/1D heterostructure may pave the way towards the wide applications for designing various nanzymes with improved catalysis.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Mengna Feng,Ming Chen,Jun Qiu,Meng He,Yumin Huang,Jing Lin
For organic film capacitors, the dielectric materials with high- k , flexible and high heat-resistance are desired. Herein, a kind of hybrid particles were fabricated via self-polymerization and crosslinking reaction, containing core-shell structured BaTiO 3 @polydopamine (BT@PDA) and MoS 2 @polydopamine (MoS 2 @PDA) interlinked with poly(ethylene imine) (PEI) to perserve better interfacial interaction and uniform dispersion in poly(arylene ether nitrile) (PEN) composites. The results suggest that the designed PEN-based composites demonstrate remarkable dielectric responses. The incorporation of hybrid particles endows the polymer composites with high relative dielectric constant and comparable low dielectric loss due to the construction of diffuse electrical double layer and more micro-capacitor networks in PEN-based composites. Particularly, the dielectric constant of composite loaded with 15 wt% hybrid particles is about 254% higher than that of PEN matrix at 1 kHz, while maintaining a relatively low dielectric loss (＜0.03). More importantly, the PEN-based composites maintain their dielectric constants from room temperature to 160 °C, thus exhibiting outstanding permittivity-temperature stability, which can better meet the requirements of high temperature applications. In conclusion, this is a feasible way to incorporate hybrid particles containing core-shell structured BT@PDA and MoS 2 @PDA into polymer matrix to design dielectric composites with excellent permittivity-temperature stability.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Yang Yang,Wenqing Zhen,Tingting Zhao,Maoquan Wu,Shouchun Ma,Liyan Zhao,Jie Wu,Li Liu,Jiaxu Zhang,Tongjie Yao
Fenton/photo-Fenton reaction was limited by slow Fe 3+ /Fe 2+ cycle, low H 2 O 2 activation efficiency, and narrow applicable pH range. Here, Fe atoms doped MoS 2 (Fe–MoS 2 ) with abundant of low-valence Mo δ+ (0 < δ < 4) was prepared. Benefiting from the powerful reduction capacity of Mo δ+ , the rate-limiting step of Fe 3+ reduction was significantly accelerated. Nearly 100% of H 2 O 2 utilization efficiency was realized. Importantly, 90% of H 2 O 2 was effectively activated to be • OH. As a result, tetracycline degradation rate in photo-Fenton reaction catalyzed by Fe–MoS 2 was 5.8 and 4.2 times higher than those of MoS 2 and Fe–MoS 2 -Hyd (prepared by hydrothermal reaction). In comparison with MoS 2 and Fe–MoS 2 -Hyd whose efficient work range were limited in acidic condition, Fe–MoS 2 was a pH-universal catalyst (pH = 2.6–14.0) by taking advantage of the exposed Mo δ+ and photoinduced electrons, largely improving the environmental tolerance. This work simultaneously addressed three bottlenecks in Fenton/photo-Fenton reaction, and provided a new strategy for the preparation of catalysts with powerful catalytic performance and high environmental adaptability.
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ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Fenghe Duan,Shuai Zhang,Longyu Yang,Zhihong Zhang,Linghao He,Minghua Wang
A novel nanostructured biosensing platform was designed based on two-dimensional (2D) nanocomposite of graphitic carbon nitride (g-C 3 N 4 ) nanosheets and MoS 2 quantum dots (MoS 2 QDs), followed by decoration with chitosan-stabilized Au nanoparticles (CS-AuNPs) (denoted as MoS 2 [email protected] 3 N 4 @CS-AuNPs), of which CS-AuNPs were prepared by plasma enhanced-chemical vapor deposition. Owning to the good surface plasmon performance of the CS-AuNPs and excellent electrochemical activity of MoS 2 [email protected] 3 N 4 nanosheets, the as-obtained 2D MoS 2 [email protected] 3 N 4 @CS-AuNPs nanocomposite was simultaneously explored to construct both surface plasmon resonance spectroscopy (SPR) sensor and electrochemical aptasensor . The MoS 2 [email protected] 3 N 4 @CS-AuNPs-based aptasensor shows strong bio-binding affinity toward the prostate specific antigen (PSA) targeted aptamer strands as compared to the individual component, including MoS 2 QDs, g-C 3 N 4 , and CS-AuNPs. When detecting PSA, the low limit of detection (LOD) of 0.71 pg mL −1 deduced by electrochemical aptasensor is three orders of magnitude lower than that deduced by SPR sensor (0.77 ng mL −1 ). As expected, both SPR sensor and electrochemical aptasensor demonstrate good selectivity , highly stability, acceptable reproducibility, and well consistent applicability in human serum. The satisfactory results suggest potential application of the MoS 2 [email protected] 3 N 4 @CS-AuNPs in bifunctional biosensing fields and clinical monitoring of cancer markers.
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MICROCHIMICA ACTA
·
2017
·Vol. 184
·期 11
·4417-4424
·
IF 4.58
Qu Fei,Liu Yining,Kong Rongmei,You Jinmao
The authors report that the fluorescence of polymer-capped silver nanoclusters (AgNCs) is quenched by MoS 2 nanosheets. However, in the presence of electrolytes such as sodium acetate (50 mM), the nanosheets tend to aggregate, and this causes fluorescence to be restored. If, however, ssDNA is added, it will be adsorbed on the surface of the MoS 2 nanosheets and stabilize them against aggregation. As a result, the emission of the AgNCs (best measured at excitation/emission wavelengths of 375/455 nm) is quenched again. If complementary oligonucleotide is added, a dsDNA will be formed that does no longer prevent aggregation and fluorescence is restored. Similarly, if an aptamer is adsorbed on the MoS 2 nanosheets and its substrate is then added to form a folded state, the fluorescence of the AgNCs also will be restored. As a proof of concept, the DNA sequences of hepatitis B virus and of a dopamine-selective aptamer were chosen as models. The resulting assays have low detection limits and linear ranges that extend from 5 to 30 nM for hepatitis B DNA, and from 0.3 to 1 μM for dopamine. In our perception, this method represents a universal platform for the detection of analytes for which complementary oligomers or aptamers are available.
The blue fluorescence of AgNCs is quenched by MoS 2 nanosheets. MoS 2 nanosheets possess different affinity toward single-stranded DNA (ssDNA) versus double-stranded (dsDNA) and folded DNA. Based on this, multiple targets can be detected through changing the sequence of ssDNA.
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Journal of Energy Storage
·
2024
·
IF 8.9
Xiaohan Li,Yan Du,Yiqing Lv,Ji Yang,Limei Cao
Mercury ions are present in water bodies through various processes and human activities, causing pollution to the environment and potential health risks to humans. In order to achieve the purification of mercury-containing wastewater and recycle of mercury resources, we designed a novel electrochemical reduction system to treat mercury-containing wastewater. MoS 2 @GF electrode was prepared by one-step solvothermal method. In the electrocatalytic reduction system MoS 2 @GF was the cathode and IrO 2 /Ti was the anode, and the reduction mechanism and optimal reaction conditions were investigated. The topological defects of GF can enable the uniformly distributed MoS 2 to expose a large number of S-vacancies, which can quickly utilize water molecules to produce H* with strong reductivity, and the anode produces ·O 2 − . These free radicals can efficiently and indirectly reduce Hg 2+ to Hg 0 . Under the conditions of voltage 2 V, electrode spacing 20 mm and stirring rate 200 r/min, the cathode achieves 96.3 % Hg 2+ removal efficiency for 50 mg/L HgSO 4 –10 % H 2 SO 4 solution in 0.5 h. The above research provides a novel method that can recover and utilize mercury resources efficiently and a thought for the application of electrochemical method to the treatment of heavy metal wastewater.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 8
·1-12
·
IF 5.479
Tang Xiao,Zeng Xueyi,Liu Huimei,Yang Yili,Zhou Haibo,Cai Huaihong
A nanohybrid probe was fabricated from manganese dioxide nanosheets (MnO 2 NSs), molybdenum disulfide quantum dots (MoS 2 QDs) and o-phenylenediamine (OPD) for ratiometric detection of glutathione (GSH) in aqueous solutions and living cells. The MoS 2 QDs act as the fluorescent “turn off-on” units. The MnO 2 NSs have 3 functions, viz. (a) as fluorescence quencher, (b) as fluorescence initiator for oxidized OPD (ox OPD) and (c) as selective recognizer of GSH. The quenched blue fluorescence of the MoS 2 QDs can be restored by introducing GSH that reduces the MnO 2 NSs. However, the green fluorescence of ox OPD is decreased through the loss of peroxidase activity of MnO 2 NSs in the presence of GSH. Therefore, the ratio of the fluorescence intensities at 560 and 400 nm (from ox OPD and MoS 2 QDs, respectively) linearly decreases with increasing concentrations of GSH. Under the optimal conditions, the detection limit for GSH is as low as 90 nM. The method was successfully applied to the determination of GSH in human serum samples. This nanohybrid also is shown to be membrane-permeable and to have low cytotoxicity. This paved the way to intracellular sensing of GSH in living normal HFF and cancerous HeLa cells. Additionally, by combining with logic gate, this assay was successfully applied to visually discriminate changes in the intracellular GSH. The combination of ratiometric fluorometry and peroxidase mimicking can provide a wide range of application in bioanalysis and intracellular imaging.
Schematic representation of the ratiometric fluorometric detection and cellular imaging of glutathione using a nanohybrid composed of MoS 2 quantum dots and MnO 2 nanosheets with dual (blue and green emission and peroxidase mimicking properties.
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RSC Advances
·
2020
·Vol. 10
·期 33
·19169-19177
·
IF 3.119
Biao Zhou,Bo Yang,Muhammad Waqas,Ke Xiao,Caizhen Zhu,Ling Wu
Constructing a 0D/3D p–n heterojunction is a feasible strategy for accelerating photo-induced charge separation and promoting photocatalytic H2 production. In this study, a 0D/3D MoS2/g-C3N4 (0D/3D-MCN) photocatalyst with a p–n heterojunction was prepared via a facile light-assisted deposition procedure, and the 3D spongy-like g-C3N4 (3D-CN) was synthesized through simple thermolysis of NH4Cl and melamine mixture. For comparison, 2D-MoS2 nanosheets were also embedded in 3D-CN by a solution impregnation method to synthesize a 2D/3D-MCN photocatalyst. As a result, the as-prepared 0D/3D-MCN-3.5% composite containing 3.5 wt% 0D-MoS2 QDs exhibited the highest photocatalytic H2 evolution rate of 817.1 μmol h−1 g−1, which was 1.9 and 19.4 times higher than that of 2D/3D-MCN-5% (containing 5 wt% 2D-MoS2 nanosheets) and 3D-CN, respectively. The results of XPS and electrochemical tests confirmed that a p–n heterojunction was formed in the 0D/3D-MCN-3.5% composite, which could accelerate the electron and hole movement in the opposite direction and retard their recombination; however, it was not found in 2D/3D-MCN-5%. This study revealed the relationship among the morphologies of MoS2 using g-C3N4 as a substrate, the formation of a p–n heterojunction, and the H2 evolution activity; and provided further insights into fabricating a 3D g-C3N4-based photocatalyst with a p–n heterojunction for photocatalytic H2 evolution.
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ADVANCED POWDER TECHNOLOGY
·
2020
·
IF 4.217
Worku Lakew Kebede,Dong-Hau Kuo,Kedir Ebrahim Ahmed,Hairus Abdullah
Pollution of water by synthetic dyes is of great concern because of the large production and usage of dyestuffs throughout the world. For dye elimination purpose, the p-n heterojunction Sb-doped MW- x composite catalysts prepared with different Mo:W precursor molar contents were synthesized via one-pot hydrothermal method. The selection in metal precursors is intended to design a composite catalyst with multiple valency in each phase. The structural, morphological, electrochemical property, and optical band gap of the composite catalyst were studied. The catalytic performance of Sb-MW composite catalysts was studied for the degradation of MB without light irradiation. It was observed that Sb-MW-4 showed superior catalytic performance to completely degrade 20 ppm MB dye solution with 20 mg catalyst in 14 min under dark condition. The composite catalyst was composed of n-(Mo,W)(O,S) 2 oxysulfide in a disordered MoS 2 framework and p-(W,Mo)(S,O) 3 sulfo-oxide in a WO 3 structure or was abbreviatedly named as n-MoS 2 /p-WO 3 based catalyst. The degradation reaction for MB dye had an apparent rate constant of 3.5 × 10 −1 min −1 . This catalyst also showed excellent stability and reusability for degrading MB dye pollutant. The degradation mechanism under dark condition is proposed.
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JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Wenzhe Wu,Xue Ren,Chengbo Zhang,Yanqi Ding,Hengjun Gai,Meng Xiao,Quanhong Zhu,Hongbing Song,Tingting Huang
The 1T-enriched spiny-shaped nanospheres with vertically oriented MoS 2 nanosheets over the surface was successfully prepared with the novel solvent induced micelle-limited Mo-CTA + composites self-assembly (SIMMS) strategy under the dual effects of mixed sulfur sources (thiourea and thioacetamide) and cetyltrimethylammonium bromide (CTAB). In the proposed strategy, the molybdenum source and CTAB are firstly assembled to Mo-CTA + by strong electrostatic attraction to avoid the molybdenum source from polymerization and forming large polymolybdate anions. Meanwhile, the CTAB moleculars self-assemble to spherical micelles, which can adsorb Mo-CTA + through van der Waals force and obtain spherical precursors with a controllable number of nucleation sites. Under the sulfurization from mixed sulfur source, appropriate reducibility can control the formation of crystal seeds and crystal growth during the crystallization process of MoS 2 , whereas CTAB can regulate and control the growth behavior and micro-morphology of MoS 2 , which is ultimately also retained between the MoS 2 nanolayersto expand their interlayer spacing and stabilize the 1T phase. Therefore, the 1T-enriched spiny-shaped nanospheres with vertically oriented MoS 2 nanosheets can be controllably prepared. In the hydrodesulfurization (HDS) reaction of dibenzothiophene (DBT) over these catalysts, the MoS 2 -75%/0.25 catalyst with the highest concentration of sulfur vacancies as well as “rim” and “rim-like” sites can reach the highest HDS activity (99.1%) and HYD/DDS ratio (4.76), which are much higher than those of the MoS 2 -H catalyst prepared by conventional hydrothermal method (HDS DBT %=46.0%, HYD/DDS ratio=0.90).
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Xinxin Jiang,Ye Song,Meiling Dou,Jing Ji,Feng Wang
In this work, we fabricated MoS 2 /WS 2 heterostrucutures with decoration of Bi 2 S 3 nanorods through different stacking sequences (MoS 2 /WS 2 (bottom layer) +Bi 2 S 3 (top layer) and Bi 2 S 3 (bottom layer) + MoS 2 /WS 2 (top layer), respectively). The morphology and structure were studied by scanning electron microscope (SEM), transmission electron microscope (TEM) and the X-ray powder diffraction (XRD). It was found that the hybrid structure with different stacking sequences was composed of Bi 2 S 3 nanorods and MoS 2 /WS 2 nanosheets. By UV–visible absorption spectra (UV–vis) and photoluminescence (PL) experiments, we found that the composite catalysts of both stacking sequences can promote visible-light utilization and accelerate the electron transportation. Electrochemical measurements (such as cyclic voltammetry (CV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscope (EIS) under light illumination or in dark) indicated that the MoS 2 /WS 2 +Bi 2 S 3 possessed higher photoelectrocatalytic activity towards hydrogen evolution reaction (HER) than that of Bi 2 S 3 +MoS 2 /WS 2 due to its proper energy band alignment that facilitates the effective carrier separation, the lower charge transfer resistance , higher electrochemically active surface area as well as the fast electron transfer kinetics. Inspired by these observations, we believe that MoS 2 /WS 2 +Bi 2 S 3 catalyst is a potential candidate for photoelectrocatalytic production of H 2 .
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危险品化学品经营许可证（带存储）