ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 33
·45588-45601
·
IF 0
Wu Haixia,Han Xiao,Guo Xinrui,Wen Yiyun,Zheng Bin,Liu Biming
The performance of catalytic ability of MFe 2 O 4 /MoS 2 in the ozonation process was investigated in this work. The synthesized MnFe 2 O 4 /MoS 2 was optimize prepared and then characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photo-electron spectroscopy, and magnetic saturation strength. The results showed that when C phenol = 200 mg/L, initial pH = 9.0, Q = 0.10 L/min, and C MnFe2O4/MoS2 = 0.10 g/L, MnFe 2 O 4 /MoS 2 addition improved the degradation efficiency of phenol by 20.0%. The effects of pH, catalyst dosage, and inorganic ions on the phenol removal by the MnFe 2 O 4 /MoS 2 catalytic ozonation were investigated. Five cycle experiments proved that MnFe 2 O 4 /MoS 2 had good recyclability and stability. MnFe 2 O 4 /MoS 2 also showed good catalytic performance in the treatment of coal chemical wastewater pesticide wastewater. The MnFe 2 O 4 doped with MoS 2 could provide abundant surface active sites for ozone and promote the stable cycle of Mn 2+ /Mn 3+ and Fe 2+ /Fe 3+ , thus generating large amounts of •OH and improving the degradation of phenol by ozonation. The MnFe 2 O 4 /MoS 2 /ozonation treatment system provides a technical reference and theoretical basis for industrial wastewater treatment.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
ACS Catalysis
·
2019
·
IF 12.221
Yunrui Zhang,Yongjun Gao,Siyu Yao,Siwei Li,Hiroyuki Asakura,Kentaro Teramura,Haijun Wang,Ding Ma
MoS2 catalysts with abundant S and Mo defects have been developed for the one-pot reductive amination of nitro compounds with aldehydes to synthesize secondary amines. The combination of multiple structural characterizations demonstrates that the density of S vacancies can be tuned by changing the thermal sublimation temperature. The experimental results and DFT calculations demonstrate that S vacancies on the surface of MoS2 are the active sites for the hydrogenation of the intermediate imines to the final products secondary amines.
研究领域:
催化化学
·
材料科学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Mengyun Wang,Chuanxuan Zhou,Fuchao Yang
The size effect through quantum dots is an effective method to improve the performance of gas sensors. This paper reports the design of a triethylamine sensor based on a SnO 2 -MoS 2 heterojunction structure. The porous SnO 2 was synthesized using a polystyrene microsphere template and then loaded with MoS 2 quantum dots (MoS 2 QDs) by the impregnation method. The gas-sensitizing properties of the prepared sensors were systematically investigated. Compared with the single SnO 2 and MoS 2 gas sensing materials, the SnO 2 -MoS 2 sensor showed higher selectivity to triethylamine at the optimal operating temperature of 160 °C, and the response performance was improved by 192 %. The results show that the SnO 2 -MoS 2 heterojunction improves the sensing performance due to its unique pore structure, oxygen vacancies and n-n heterojunction. In addition, the energy band structure and triethylamine sensing mechanism of SnO 2 -MoS 2 heterojunctions were analyzed by density functional theory. This work provides significant value for the study of gas-sensitive properties and triethylamine sensors of SnO 2 -MoS 2 QDs composites.
研究领域:
材料科学
·
传感器技术
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zhenyu Gao,Baixue Deng,Longfei Xu,Jun Tang,Qianqian Zhao,Tianfeng Hu,Yu Chen,Lingfeng Deng,Yuanjuan Bai,Kun Du
The risks associated with dye wastewater to the ecological environment are becoming increasingly significant. The efficient utilization and effective protection of water resources have become a persistent challenge. Employing coupling technologies to enhance the wastewater treatment process is an effective strategy for achieving sustainable water resource utilization. Herein, composite catalysts with iron-based metal-organic frameworks loaded with molybdenum disulfide (Fe-MOF@MoS₂) were prepared by a hydrothermal approach. The Fe-MOF@MoS 2 composite catalysts demonstrated superior degradation efficiencies towards various organic dyes like methylene blue, rhodamine B, and Congo red, especially in conditions of low hydrogen peroxide concentration and ultrasonic vibration. Results indicated that after 30 minutes of piezoelectric-Fenton-like treatment, the removal efficiency of the above organic dyes exceeded 90 %. The piezoelectric effect led to efficient cyclic conversion of Fe 2+ /Fe 3+ ions, while the inclusion of MoS 2 enhanced H 2 O 2 activation efficiency. Moreover, the Fe-MOF@MoS 2 catalyst displayed remarkable recycling capabilities, retaining 90 % of its initial catalytic activity even after six degradation cycles. Thus, the development of composite catalysts with combined piezoelectric and Fenton-like functions holds great promise for improving organic dye wastewater treatment and safeguarding environmental and water resources.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Yalei Zhang,Zengfu Yin,Chaomeng Dai,Xuefei Zhou,Wen Chen
Flower-like MoS 2 with numerous wrinkled nanosheets was prepared via a facile hydrothermal method . The surface morphology and microstructure of the obtained materials were characterized using X-ray diffraction data (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Additionally, the compositions of the flower-like MoS 2 were further revealed by an energy dispersion spectrometer (EDX) and X-ray photoelectron spectrometry (XPS). The obtained MoS 2 was used as an adsorbent to remove diclofenac (DCF, C 14 H 10 Cl 2 NO 2 Na) from aqueous solutions and presented excellent performance for removing DCF. The sorption kinetics, isotherms and effect of solution pH on the sorption were evaluated in batch sorption experiments. The sorption characteristics of the interactions between DCF and MoS 2 in water were analyzed using a pseudo-second-order model, an intraparticle diffusion model and Boyd model to determine the sorption rate-determining steps. It was concluded that the sorption of DCF on MoS 2 was fitted better by the pseudo-second-order model and that external diffusion governed the sorption process of DCF onto the MoS 2 . The interfacial interaction free energies between DCF and MoS 2 in the sorption process can be calculated based on the extended Derjaguin–Landau–Verwey–Overbeek (XDLVO). The flower-like MoS 2 presenting excellent performance for removing DCF, could be a better choice of treating DCF-containing wastewaters.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Theranostics
·
2015
·
IF 8.022
Jie Yu,Wenyan Yin,Xiaopeng Zheng,Gan Tian,Xiao Zhang,Tao Bao,Xinghua Dong,Zhongliang Wang,Zhanjun Gu,Xiaoyan Ma,Yuliang Zhao
The ability to selectively destroy cancer cells while sparing normal tissue is highly desirable during the cancer therapy. Here, magnetic targeted photothermal therapy was demonstrated by the integration of MoS 2 (MS) flakes and Fe 3 O 4 (IO) nanoparticles (NPs), where MoS 2 converted near-infrared (NIR) light into heat and Fe 3 O 4 NPs served as target moiety directed by external magnetic field to tumor site. The MoS 2 /Fe 3 O 4 composite (MSIOs) functionalized by biocompatible polyethylene glycol (PEG) were prepared by a simple two-step hydrothermal method. And the as-obtained MSIOs exhibit high stability in bio-fluids and low toxicity in vitro and in vivo . Specifically, the MSIOs can be applied as a dual-modal probe for T 2 -weighted magnetic resonance (MR) and photoacoustic tomography (PAT) imaging due to their superparamagnetic property and strong NIR absorption. Furthermore, we demonstrate an effective result for magnetically targeted photothermal ablation of cancer. All these results show a great potential for localized photothermal ablation of cancer spatially/timely guided by the magnetic field and indicated the promise of the multifunctional MSIOs for applications in cancer theranostics.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Xuechang Ren,Ju An,Suying Ding,Zhenyu Yang,Miao Tian,Ning Fu
MoS 2 /MIL-88A (Fe) composite catalyst was prepared by in-situ formation method. The material was characterized by SEM, TEM, XRD and XPS, and the Rhodamine B(RhB) was activated and degraded by persulfate (PMS). The results showed that M-10/M 1:2 had the best degradation effect on RhB, the rate constant was 0.66420 min −1 , and the degradation rate could reach 1.89–14 times that of other doped composite catalysts. The SEM results showed that M − 10 had the least sulfur content, fewer MoS 2 flower layers and more exposed Mo 4+ atoms, which improved the electron transfer efficiency and accelerated the degradation reaction. The XPS spectra before and after M-10/M 1:2 reaction showed that the REDOX reaction of Fe 3+ /Fe 2+ and Mo 4+ /Mo 6+ on the catalyst surface played an important role in the activation of PMS. The results of free radical capture experiment and ESR test showed that the main active substances in M-10/M 1:2 /PMS reaction system were SO 4 •− , 1 O 2 , •O 2 − , and •OH, which only played a role in the degradation of RhB. Finally, based on the ESR results of M-10/M 1:2 /PMS system and the changes of Fe and Mo elements in XPS characterization before and after the reaction, the degradation mechanism of M-10/M 1:2 /PMS system was proposed.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 30
·期 4
·879-888
·
IF 2.162
Rui Gao,Shuguang Wang,Keqing Zhou,Xiaodong Qian
In the present work, a facile and environmental method was developed to fabricate the novel functionalized MoS 2 hybrid. Firstly, MoS 2 nanosheets were coated with polydopamine (PDA) through the self-polymerization of dopamine (MoS 2 -PDA) in a buffer solution. Then the decoration of Ni(OH) 2 on the MoS 2 -PDA was synthesized because of the strong affinity of Ni 2+ with hydroxyl groups in PDA. Finally, the as-synthesized MoS 2 -PDA@Ni(OH) 2 was introduced into poly(lactic acid) (PLA) matrix to explore flame retardancy, thermal stability, and crystalline property of the composites. As confirmed by X-ray diffraction (XRD), Fourier-transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA), the MoS 2 nanosheets were dually modified with PDA and Ni(OH) 2 without destroying the original structures. The thermal degradation of PLA with MoS 2 -PDA@Ni(OH) 2 generated a notably higher yield of char. Moreover, the crystallization rate of composites is higher than neat PLA. The cone calorimeter test revealed that the introduction of 3% MoS 2 -PDA@Ni(OH) 2 resulted in lower Peak Heat Release Rate (PHRR) (decreased by 21.7%). Thus, the research provided an innovative functionalization method for manufacturing PLA composites with high performances.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Minghui Yu,Qi Hu,Xiaoyu Gong,Hao Yu,Shuang Wang,Zhiqiang Li,Yanyan Chen,Shenjie Li
In this study, CdIn 2 S 4 /MoS 2 composite structure was prepared by a simple two-step hydrothermal synthesis method, and the CdIn 2 S 4 /MoS 2 composite structure samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV–vis diffuse reflectance spectroscopy (UV–vis). Due to the effective loading of MoS 2 on the surface of CdIn 2 S 4 particles, the photocatalytic performance of CdIn 2 S 4 /MoS 2 composite material is significantly improved under visible light irradiation (λ = 420 nm), which indicating the effective inhibit the recombination of photogenerated electron holes . Meanwhile, the visible light response of CdIn 2 S 4 is increased and the life of photoexcitation carrier is prolonged. The CdIn 2 S 4 /MoS 2 (sample 2CM) composite sample with mole content of 9% has the highest catalytic hydrogen production activity, and its hydrogen production rate is 293 μmol h −1 g −1 , which is more than 3 times that of sample C. After 4 cycles of photocatalytic experiments, the photocatalytic activity is still stable, and the XRD diffraction peak does not appear obvious shift, which provides a new way for the design and preparation of efficient and stable photocatalytic materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 39
·18718-18723
·
IF 3.925
Rui Shi,Jin Yang,Shiqi Cheng,Shangying Qin,Li Huang,Yilin Wang,Yuanjin Xu
AuNPs@MoS2 NSs with high peroxidase-like activity were prepared and used for the colorimetric determination of biothiols. The synergistic effect between gold nanoparticles (AuNPs) and MoS2 nanosheets (MoS2 NSs) accelerated the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of H2O2 to form the blue oxidized TMB (oxTMB) with an absorption peak at 652 nm. However, the AuNPs@MoS2 NS-catalyzed TMB oxidation could be inhibited by biothiols, resulting in an absorbance decrease. Under the optimized experimental conditions, the signal responses to homocysteine (Hcy), glutathione (GSH), and cysteine (Cys) were linear in the range from 1.0 to 100 μmol L−1, and the limit of detection of these biothiols was 0.93, 0.71, and 0.73 μmol L−1, respectively. The suggested method was successfully applied for the determination of Hcy in human serum samples with a recovery of 97.7–101.2%, indicating the potential application of this method for biothiol sensing in real samples.
研究领域:
分析化学
·
生物医学工程
·
纳米材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2016
·Vol. 163
·期 13
·H1087
·
IF 3.014
Yongzhen Shen,Xiaohui Ren,Xiang Qi,Jie Zhou,Zongyu Huang,Jianxin Zhong
The exploration of high efficient eletrocatalysts for hydrogen evolution reaction (HER) is a challenge as well as an opportunity for future applications in renewable sustainable energy. In this paper, a two-dimensional laminate MoS2/TiO2 heterostructure, in which the MoS2 nanosheet is loaded with TiO2 nanoparticles, have been synthesized via a facile hydrothermal process. The as-prepared MoS2/TiO2 electrode demonstrates improved electrocatalytic performance compared to bare MoS2 or TiO2 electrodes. Subsequently, a series of characterization techniques including X-ray diffraction and Raman spectroscopy are carried out to confirm crystallization of MoS2/TiO2 hybridization. Additional morphological and microstructural tests verify a distinct MoS2 framework, indicating a relative stability of MoS2 nanosheet platform. Electrochemical measurements reveal the overpotential and Tafel slope of as-prepared MoS2/TiO2 electrode are −185 mV and 46 mV/dec, which are very close to that of Pt electrode. The HER improvement is proposed to be attributed to the increase conductivity which derives from the reactive MoS2 layer structure, as well as the synergic effect of MoS2/TiO2 heterostructure. We hope this work could provide a novel prototype for the efficient hybrid HER catalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Rui Xue,Rong Qiang,Yulong Shao,Xiao Yang,Qian Ma,Yi Chen,Fangjie Ren,Yuancheng Ding,Bowen Chen,Shijiang Feng
The construction of hierarchical structures has been demonstrated to be an effective method for achieving high-performance microwave absorption. In this study, a flower-like MoS2 nanosheet-coated tubular carbon composite with an average diameter of approximately 560 nm was synthesized via a straightforward ion-exchange and pyrolysis strategy. The growth of MoS2 nanosheets, the presence of heterojunction surfaces, and the construction of the hollow structure collectively enhance the dielectric loss of the material, thereby optimizing the microwave absorption properties of the material. The C@MoS2 nanocomposite demonstrates a minimum reflection loss of −66.8 dB and an effective absorption bandwidth of 4.8 GHz when the thickness is only 1.6 mm. This work presents a synergistic strategy for the design of layered hollow structures.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）