ENVIRONMENTAL RESEARCH
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2023
·
IF 8.3
Hao Cheng,Chao Huang,Ping Wang,Dingxun Ling,Xiaoyu Zheng,Haiyin Xu,Chongling Feng,Hao Liu,Min Cheng,Zhiming Liu
The conventional Fenton process has the drawbacks of low efficiency of Fe 3+ /Fe 2+ conversion, low utilization of H 2 O 2 , and narrow range of pH. In this paper, molybdenum sulfide (MoS 2 ) was used as a co-catalyst to boost the nanoscale zero-valent iron (nZVI) based heterogeneous Fenton-like process for the degradation of Rhodamine B (RhB). The catalytic performance, influences of parameters, degradation mechanism, and toxicity of intermediates were explored. Compared with the conventional like-Fenton process, the existence of MoS 2 accelerated the decomposition of H 2 O 2 and the RhB degradation rate constant of MoS 2 /nZVI/H 2 O 2 reached more than six times that of nZVI/H 2 O 2 . In addition, the effective pH range of MoS 2 /nZVI/H 2 O 2 was broadened to 9.0 with 84.9% of RhB being removed within 15 min. The co-catalytic system of MoS 2 and nZVI was stable and had high reusability according to the results of four consecutive runs. Quenching tests and electron paramagnetic resonance (EPR) demonstrated that hydroxyl radical (·OH), superoxide anions (·O 2 − ), and singlet oxygen ( 1 O 2 ) were all involved in MoS 2 /nZVI/H 2 O 2 . Compared with nZVI/H 2 O 2 system, MoS 2 not only increased the corrosion of nZVI but also accelerated the conversion of Fe 3+ /Fe 2+ . ECOSAR analysis suggested that the overall acute and chronic toxicity of the degradation products decreased after treatment. Hence, this MoS 2 co-catalytic nZVI based Fenton-like process can be used as a promising alternative for the treatment of organic wastewater.
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高影响因子
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
·
2023
·Vol. 29
·期 3
·522-533
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IF 2.7
Xiaming Feng,Hongyu Yang
For the first time, a novel nanohybrid based on nickel phosphide (Ni 2 P) nanoparticles and molybdenum disulfide (MoS 2 ) nanosheets was facilely synthesized for enhancing flame retardancy and smoke suppression of thermoplastic polyurethane (TPU). The synergistic effect on flame retardancy is proposed. TPU composite with 2 wt% Ni 2 P/MoS 2 hybrid exhibits the best overall flame retardancy, while TPU composites with the same amount of individual Ni 2 P nanoparticles and MoS 2 nanosheets are average in performance. Specifically, the 41.2% reduction of peak heat release rate (PHRR) is achieved for TPU/Ni 2 P/MoS 2 composite, which is only 16.8% and 26.4% for TPU/Ni 2 P and TPU/MoS 2 composites, respectively. In addition, a more intact protective char layer of TPU/Ni 2 P/MoS 2 composite can be observed. These results clearly suggest the synergistic effect between Ni 2 P nanoparticles and MoS 2 nanosheets. It is hypothesized that physical barrier effect and chemical catalytic ability of Ni 2 P/MoS 2 hybrid contribute to the dramatic reduction of heat release and smoke production. The strategy proposed here is a simple yet efficient approach to fabricate high-performance MoS 2 -based flame retardants.
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Membranes
·
2022
·Vol. 12
·期 11
·1071
·
IF 4.562
Huali Tian,Xing Wu,Kaisong Zhang
To enhance the permeation and separation performance of the polyethersulfone (PES) tight ultrafiltration (TUF) membrane, two-dimensional molybdenum disulfide (MoS2) was applied as a modifier in low concentrations. The influence of different concentrations of MoS2(0, 0.25, 0.50, 1.00, and 1.50 wt%) on TUF membranes was investigated in terms of morphology, mechanical strength properties, permeation, and separation. The results indicate that the blending of MoS2tailored the microstructure of the membrane and enhanced the mechanical strength property. Moreover, by embedding an appropriate amount of MoS2into the membrane, the PES/MoS2membranes showed improvement in permeation and without the sacrifice of the rejection of bovine serum protein (BSA) and humic acid (HA). Compared with the pristine membrane, the modified membrane embedded with 0.5 wt% MoS2showed a 36.08% increase in the pure water flux, and >99.6% rejections of BSA and HA. This study reveals that two-dimensional MoS2can be used as an effective additive to improve the performance and properties of TUF membranes for water treatment.Keywords:tight ultrafiltration membrane;molybdenum disulfide;humic acid rejection;BSA rejection
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ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Di Liu,Yixuan Bian,Zhiwei Zhu,Yuanhua Shao,Meixian Li
Molybdenum disulfide nanomaterials nowadays are very popular in electrocatalysis field due to their outstanding catalytic performance toward many electrochemical reactions. However, the electrochemical oxidation reaction of molybdenum disulfide nanomaterials in the range of positive potential has not been studied thoroughly. Herein, we have investigated electro-oxidation of molybdenum disulfide nanomaterials and put forward a new reaction mechanism: molybdenum disulfide nanomaterials are electro-oxidized with water to form molybdenum oxysulfide (MoOS2) and hydrogen ions, leading to the release of hydrogen on the counter electrode. Various characterization methods such as contact angle measurement, scanning electron microscope (SEM), transmission electron microscope (TEM) with energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), X-ray absorption near edge structure (XANES) spectroscopy, time-of-flight secondary ion mass spectrometry (ToF-SIMS), and gas chromatography (GC) were applied to attest the doping of oxygen and the generation of hydrogen. Based on this reaction, we constructed a novel ultrasensitive electrochemical sensor for detecting trace water with the minimum detectable content of 0.0010% (v/v) in various organic solvents and ionic liquids, which is comparable to the Karl Fischer titration, but with much simpler reagent.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Qiang Yao,Jing Guo,Fucheng Guan,Qiang Yang,Xin Zhang,Yi Xu,Jia Li,Da Bao
The dyeing and finishing industry inevitably produces a large amount of wastewater, and how to treat pollutants such as methylene blue (MB) in the wastewater is a huge challenge. In this paper, molybdenum disulfide (MoS 2 ) after simple ultrasonic treatment was added to the sodium alginate/Antarctic krill protein composite fiber (SAF) as an additive, and the MoS 2 -sodium alginate/Antarctic krill protein composite fiber (MSAF) was successfully prepared, which was used as an adsorbent for MB. The results indicated that MSAF had an excellent adsorption effect on MB, the maximum adsorption capacity in the experiment could reach 472.68 mg/g, which was 27 % higher than that of SAF, and the theoretical adsorption capacity calculated by fitting could reach 934.58 mg/g. Moreover, the MSAF still has high adsorption efficiency after five adsorption-desorption cycles. Based on the data of the present investigation, MSAF can be used as an efficient and reliable adsorbent and is expected to be used as a functional textile fabric in the fields of filtration and treatment of textile printing and dyeing wastewater.
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TALANTA
·
2020
·
IF 5.339
Yinhui Yi,Wei Zeng,Gangbing Zhu
Through modifying molybdenum disulfide quantum dots (MoS 2 QDs) with 3-aminophenyl boronic acid and functionalizing further with hydropropyl-β-cyclodextrin (β-CD), a novel nanoprobe based on β-CD functionalized MoS 2 QDs (β-CD-MoS 2 QDs) was developed for the fluorescent detection of parathion-methyl (MP). β-CD-MoS 2 QDs was characterized with various technologies including transmission electron microscopy , X-ray photoelectron spectroscopy, fluorescence and UV–Vis absorption spectra. As for MP detection, MP was hydrolyzed to p-nitrophenol (p-NP) under the alkaline conditions, and p-NP can enter into the β-CD cavity due to the host-guest recognition capability of β-CD, which then results the fluorescence quenching of nanoprobe. Based on this principle, an enzyme-free fluorescence sensing platform were constructed for MP. Under the optimal conditions, β-CD-MoS 2 QDs nanoprobe exhibits wide detection scope (0.01–18.0 ppm) and low detection limits (3.3 ppb) for MP detection. In addition, the nanoprobe has excellent selectivity for MP, and it can be applied to detect MP in real samples.
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SYNTHETIC METALS
·
2020
·
IF 3.286
Ke Qu,Yuqi Bai,Bo Chen,Miao Deng
Researchers have been focusing on the electrochemical energy storage system to tackle with the current energy crisis problem. With the increased demand of wearable electronics, all-solid-state flexible supercapacitors are becoming promising energy storage device. In this study, a simple and facile method was practiced to prepare hybrid composites by integrating molybdenum disulfide (MoS 2 ) and graphene oxide (GO) as dual dopants to co-dope conducting polymer polyaniline (PANI), affording the PANI/MoS 2 /GO composite via in situ chemical oxidative polymerization. The as-prepared PANI/MoS 2 /GO composite was characterized by various spectroscopic methods, ranging from X-ray powder diffraction, infrared spectroscopy to scanning electron microscopy. The supercapacitive properties of the prepared dual dopant-doped composite as electrode materials have been evaluated electrochemically and yielded specific capacitance of 130.4 F/g under 1.0 A/g current density. Excellent rate performance was observed for the PANI/MoS 2 /GO composite, giving specific capacitance of 96.7 F/g with 10.0 A/g current density applied. The composite remained to give an excellent capacitance retention of 98.5 % after 500 galvanostatic charge-discharge cycles, which demonstrated the unique stabilizing effects of MoS 2 and GO dual dopants toward PANI’s energy storage behavior in terms of supercapactive performances. The findings in this study will contribute significantly to the progress of conducting polymer-based energy storage materials.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2020
·Vol. 412
·期 6
·1365-1374
·
IF 3.637
Luo Qiurong,Ren Xiujun,Wei Siping,Zheng Yunchao,Gao Die,Fu Qifeng,Xia Zhining,Wang Lujun
Molybdenum disulfide quantum dots (MoS 2 QDs) were chosen as a functional two-dimensional material to improve the separation performance of a traditional C18 column. In this work, MoS 2 QDs were synthesized by the combination of sonication and solvothermal treatment of bulk MoS 2 . The prepared MoS 2 QDs were characterized by transmission electron microscope (TEM), Zeta potential measurement, UV-visible absorption and fluorescence spectroscopy. Then, a novel MoS 2 QDs embedded C18 (Sil-MoS 2 -C18) stationary phase was prepared for performing mixed-mode liquid chromatography. The results of elemental analysis (EA), thermogravimetric analysis (TGA), Fourier transform infrared spectrometry (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET) measurements indicated the stationary phase was prepared successfully. Five types of compounds including alkylbenzenes, polycyclic aromatic hydrocarbons (PAHs), nucleosides and nucleobases, anilines and flavonoids were utilized to evaluate reversed phase, weak cation exchange and hydrophilic interaction of the new column. To a certain extent, the column could achieve separation for different properties of samples on one column, with less organic solvent and shorter time than conventional alkyl and amino columns. Furthermore, the mechanism for separation was studied by investigating effects of mobile phase composition and pH on retentions. In summary, the Sil-MoS 2 -C18 stationary phase was deemed able to serve the performance of various types of phases, which revealed the prepared mixed-mode column could be potentially applied for the analysis of complex samples.
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SYNTHETIC METALS
·
2019
·
IF 2.87
Yujuan Jing,Pingquan Wang,Qiangbin Yang,Yi He,Yang Bai
Epoxy coatings play an important role in preventing the corrosive medium penetrating into the base metal, but improving its durability in harsh environments is still a challenge. Nanomaterial introduced in epoxy coatings is an effective improvement measure, especially, the use of two-dimensional nanomaterial can effectively block the corrosion medium. In this paper, we use two-dimensional molybdenum disulfide (MoS 2 ) hybrid materials as nanofiller to improve the corrosion resistance of epoxy coatings. MoS 2 hybrid materials were obtained by an effective method based on self-oxidation of dopamine and functionalized silane (KH560) grafting. The poly(dopamine) and epoxy groups on the surface of MoS 2 enhanced the interaction with EP matrix. The anticorrosive performance of composite epoxy coating with the different content of MoS 2 hybrid materials was investigated in detail. An appropriate content (0.8 wt%) in the epoxy coating was obvious to improve its anti-corrosion performance.
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CHEMICAL PAPERS
·
2018
·Vol. 72
·期 12
·2997-3003
·
IF 0.963
Guo Dongqing,Fu Likang,Wang Shixing,Zhang Libo,Peng Jinhui
A new purification method for molybdenum disulfide via NaNO 3 –HCl–HNO 3 synergistic leaching at 80 °C was developed. The effects of the concentration of NaNO 3 , HCl, and HNO 3 , and liquid–solid ratio and the leaching time on the purification of molybdenum disulfide were investigated by orthogonal array design methodology. The results of Taguchi method utilizing L 25 (5 5 ) orthogonal array indicated that the NaNO 3 concentration had the greatest impact on the purification of molybdenum disulfide. The optimum conditions for the purification of molybdenum disulfide were as follow: concentration of NaNO 3 = 2.5%, concentration of HCl = 11%, concentration of HNO 3 = 1.0%, liquid–solid ratio = 3, and the leaching time = 10 h. Under optimum conditions, the content of molybdenum increased from 55.1 to 59%, and the contents of iron, copper, lead, and calcium decreased from 0.35 to 0.21%, 0.027 to 0.008%, 0.054 to < 0.005%, and 0.27 to 0.035%, respectively. Based on molecular formula of molybdenum disulfide, the content of molybdenum disulfide increased from 91.93 to 98.44%. XRD and SEM indicated that this method removed only the impurities and did not affect the phase and particle size of molybdenum disulfide. The results show that the new purification method avoids the roasting process and will achieve the “green” production. The new method based on orthogonal array is effective for the purification of molybdenum disulfide via acid leaching.
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TALANTA
·
2024
·
IF 5.6
Sen Wang,Zhongjun Yan,Fei Shen,Lihui Du,Guanglei Li,Qian Yang,Qiuhui Hu
Endotoxins , also known as lipopolysaccharides (LPS), are present within the cell walls of Gram-negative bacteria and are released upon cellular death, which can pose a significant risk to human and animal health. Due to the minimal amount of endotoxin required to trigger an inflammatory response in human body, the demand for sensitive methods with low endotoxin detection limits is essential necessary. This paper presents a straightforward aptamer sensor which can enhance the conductivity and specific surface area of molybdenum disulfide (MoS 2 ) by incorporating carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) and polyaniline (PANI). Doping with gold nanoparticles (AuNPs) improves biocompatibility and sensitivity while providing binding sites for thiolated endotoxin-binding aptamers (LBA). This biosensor achieved a remarkable detection limit as low as 0.5 fg mL −1 , enabling trace-level identification of LPS. It also exhibits excellent repeatability, selectivity , and stability, facilitating rapid and accurate LPS detection. Moreover, this method demonstrates high recovery rates and specificity for LPS analysis in food samples, showcasing its promising application prospects in trace-level LPS detection within the food industry.
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Advanced Science
·
2025
·
IF 14.1
Haomiao Bai,Sujun Ding,Yanfei Dai,Jiefu Liu,Huangjing Chen,Wei Feng,Dehong Yu,Yu Chen,Xuejun Ni
Piezoelectric semiconductor nanomaterials have attracted considerable interest in piezocatalytic tumor treatment. However, piezocatalytic therapy encounters obstacles such as suboptimal piezoelectric responses, rapid electron-hole recombination, inefficient energy harvesting, and the complexities of the tumor microenvironment. In this study, sulfur vacancy-engineered cobalt (Co) single-atom doped molybdenum disulfide (SA-Co@MoS 2 ) nanoflowers are strategically designed, which exhibit enhanced piezoelectric effects. Specifically, the introduction of Co single atom not only induces lattice distortion and out-of-plane polarization but also leads to the formation of numerous sulfur vacancies. These changes collectively narrow the intrinsic bandgap of the material, facilitating effective separation and migration of charge carriers, and enabling efficient production of reactive oxygen species under ultrasound stimulation. Additionally, the SA-Co@MoS 2 nanoflowers demonstrate improved enzymatic activity and exhibit glutathione depletion capabilities attributed to the mixed valence states of Co, intensifying oxidative stress in tumor cells, and leading to cell cycle arrest and apoptosis, while the inactivation of glutathione peroxidase 4 induces ferroptosis. Both in vitro and in vivo results indicate that SA-Co@MoS 2 nanoflowers can significantly eliminate tumor cells. This study offers valuable insights into the exploration of single-atom doping-enhanced piezoelectric sonosensitizers for cancer treatment, potentially paving the way for advancements in the field of piezocatalytic synergistic enzyodynamic therapy.
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