JOURNAL OF SOLID STATE CHEMISTRY
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2022
·
IF 3.656
Li-hu Qian,Wei-wei Dong,Min-da Xu,Yan-Bo Cao,Xuan Wu,Xiao-jie Song,Yi Ding,Xi Wang
Developing hybrid metal sulfide electrocatalyst with excellent hydrogen evolution reaction (HER) catalytic performance and stability is vital to its commercial applications. Herein, hybrid CuCo 2 S 4 @ MoS 2 catalysts were designed with CuCo 2 S 4 synthesized by using ZIF-67 as a template and externally decorated with MoS 2 . The hybrid catalysts (denoted as C@M-0.5, C@M − 1, C@M − 2) show improved catalytic activity than those of MoS 2 and CuCo 2 S 4 due to large surface area and the interface between nanoflower-like MoS 2 and three-dimensional interconnected lamellar stacked CuCo 2 S 4 , which boost charge transport capability and improve the HER kinetic process. The influences of different ratio of CuCo 2 S 4 to MoS 2 on the electrocatalytic activity are investigated in detail. Specifically, C@M − 1 exhibit the best HER performance with an overpotential of 143 mV@ 10 mA/cm 2 , a Tafel slope of 45.2 mV/dec and satisfactory long-time stability. This work rationally designs hybrid CuCo 2 S 4 @MoS 2 catalyst to preserve the merits of using the ZIF-67 as a template and make use of the synergistic coupling effects between CuCo 2 S 4 and MoS 2 , which can be extended to synthesize other catalysts in different energy conversion fields.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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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
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
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IF 5.3
Xiaowan Yu,Kaiwei Huang,Yixin Zhang,Yuhan Jin,Yayu Chen,Fangchuan Chen,Xiaoyan Zhang
Bacterial infection and antibiotic resistance bring great trouble to anti-infective treatment. Therefore, it is urgent to develop antibacterial materials with high efficiency as alternatives. Herein, we successfully synthesized a series of peroxidase-like CoP/MoS2 catalysts to strikingly enhance the photocatalytic antibacterial activity. After excitation by LED light, the CoP/MoS2 heterojunction composite exhibited a photocatalytic sterilizing rate of 97.2% toward S. aureus with a concentration of 1 mg/mL. Based on the theoretical discussion and experimental result analysis, it is concluded that the sharp edges of MoS2 nanosheets, excellent hydrophilicity of CoP/MoS2, and incorporation with the generation of reactive oxygen radicals endow the catalyst with rapid and effective photocatalytic bacterial killing activity. This study provides a promising strategy by using adhesive nanozymes in close proximity to the bacteria surface, which will guide the design and synthesis of heterojunction photocatalysts with nanozymes activity and high photocatalytic antibacterial efficiency.
研究领域:
材料科学
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微生物学
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医学
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 33
·45588-45601
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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
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化学工程
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产品关联
DOI
PubMed
ACS Catalysis
·
2019
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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
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材料科学
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Yuancai Lv,Shiyu He,Shuting Liu,Zhendong Yu,Yanting Jiang,Yihui Hu,Yifan Liu,Chunxiang Lin,Xiaoxia Ye,Guifang Yang,Minghua Liu
Doping polymetals on Fe-based catalysts is proved to be an effective way to improve the performance on activating persulfate. In this paper, a highly efficient persulfate activation catalyst (FeCo@MoS 2 ) was successfully synthesized by introducing MoS 2 onto the surface of FeCo nanoboxes. During the activation of PMS the introduced of MoS 2 effectively promoted the formation of free radicals (∙OH, SO 4 · - ), 1 O 2 and Fe(IV). Due to the synergistic effects between Mo and Fe, FeCo@MoS 2 has better catalytic activity (2.01 times larger of defluorination efficiency and 3.91 times larger of the apparent rate constant ( k obs )) than FeCo. Under the optimal conditions (catalyst dosage of 0.2 g L −1 , PMS dosage of 1.0 g L −1 and initial pH 4.0), the perfluorooctanoic acid (PFOA, 10 mg L −1 ) could be degraded in 60 min, with 90.26 ± 2.64% of the defluorination efficiency. The LC- MS results showed that under the attack of free radicals (∙OH, SO 4 · - ), 1 O 2 and Fe(IV), the PFOA underwent step-by-step defluorination process. In addition, the ECOSAR results showed that during the whole degradation of PFOA in FeCo@MoS 2 /PMS system, no highly toxic intermediates was accumulated, suggesting a green degradation process. This work showed new ideas and strategies for studying the influence of polymetallic doping on the catalytic process of PMS multiphase catalytic system.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
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2024
·
IF 5.2
Jiaxin Zheng,Miao Wang,Xinli Tong,Ye Yuan
The catalytic selective etherification of 5-hydroxymethyl furfural (5-HMF) is considered as a feasible route to prepare the biofuels from biomass feedstocks. In this work, a novel solid acid catalyst derived from the flower-like MoS 2 is synthesized by combination of the facile hydrothermal method and reduction process. Therein, the number of Lewis and Bronsted acidic sites derived from the exposed Mo edges of MoS 2 can be efficiently regulated by changing the hydrogen annealing conditions. The prepared MoS 2 -450-R catalyst exhibited a prominent activity for the conversion of 5-HMF to 5-(methoxymethyl)furanal dimethyl acetal (5-MFDMA) through the tandem acetalization and etherification under N 2 atmosphere, in which a 99.0 % conversion with 83.7 % selectivity of 5-MFDMA is obtained. Further investigations revealed that the abundant acidic sites of MoS 2 -450-R plays a crucial role on the reaction of 5-HMF with methanol. Finally, based on the characterization of catalyst and reaction phenomena, a possible reaction network for the acetalization and etherification of 5-HMF with the methanol has been proposed.
研究领域:
催化化学
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生物质能
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2023
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IF 4.1
Chuangchuang Yang,Anpeng Hu,Qiaoling Dai,Qinghe Yang,Ranran Hou,Zhiwei Liu
Hydrodesulfurization (HDS) is an important process for the production of clean fuel oil, and the development of a new environmentally friendly, low-cost sulfided catalyst is key research in hydrogenation technology. Herein, commercial bulk MoS2 and NiCO3·2NiOH2·4H2O were first hydrothermally treated and then calcined in a H2 or N2 atmosphere to obtain Ni–MoS2 HDS catalysts with different structures. Mechanisms of hydrothermal treatment and calcination on Ni–MoS2 catalyst structures were investigated by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS). The catalytic performance of Ni–MoS2 catalysts was evaluated by the HDS reaction of dibenzothiophene (DBT) on a fixed bed reactor, and the structure–activity relationship between the structures of the Ni–MoS2 catalyst and the HDS of DBT was discussed. The results showed that the lateral size, the number of stacked layers, and the S/Mo atomic ratio of MoS2 in the catalyst decreased and then increased with the increase of the hydrothermal treatment temperature, reaching the minimum at the hydrothermal treatment temperature of 150 °C, i.e., the lateral size of MoS2 in the catalyst was 20–36 nm, the number of stacked layers of MoS2 was 5.4, and the S/Mo ratio in the catalyst was 1.80. In addition, the effects of different calcination temperatures and calcination atmospheres on the catalyst structures were investigated at the optimum hydrothermal treatment temperature. The Ni–Mo–S and NixSy ratios of the catalysts increased and then decreased with the increasing calcination temperature under a H2 atmosphere, reaching a maximum at a calcination temperature of 400 °C. Therefore, DBT exhibited the best HDS activity over the H-NiMo-150–400 catalyst, and the desulfurization rate of DBT reached 94.7% at a reaction temperature of 320 °C.
研究领域:
催化化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
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2024
·
IF 3.9
Yan-Bo Cao,Yan-Peng Ye,Wei-wei Dong,Zhi-biao Li,Yi Ding,Wei-li Kong,Xi Wang
Hydrogen, a new energy source that emits no carbon and has a high energy content, has recently attracted significant attention. The CoS 2 /MoS 2 catalyst was produced using a one-step hydrothermal synthesis process. With a current density of 10 mA cm −2 , the CoS 2 /MoS 2 catalyst shows an overpotential of 116.8 mV for the HER under the 300 W Xe lamp's solar simulation, a 23 % improvement over the dark condition. Both the properly prohibited bandwidths of CoS 2 and MoS 2 , which promote the creation of photogenerated carriers and the existence of a p-n junction between them, are responsible for improving the photo-enhanced HER performance. The photoinduced electro-hole pairs' separation is improved by this p-n junction, reducing their likelihood of recombination and thereby enhancing the electrocatalytic ability of the system. This work demonstrates the possibility of photoelectric synergistic enhancement of the electrocatalytic performance of transition metal sulfides.
研究领域:
材料科学
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催化化学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2022
·
IF 6.562
Yiming Ma,Yushuai Sang,Kai Wu,Qingfeng Liu,Hong Chen,Yongdan Li
Low selectivity and complex product distribution are the main challenges for the utilization of lignin. Herein, the selective production of 2-(tert-butyl)-3-methylphenol (TBC), an antioxidant in the polymer industry, from depolymerization of enzymatic hydrolysis lignin (EHL) on a hydrothermally synthesized MoS 2 catalyst is studied. The total aromatic monomer yield is 124.1 mg/g EHL and the selectivity of TBC is up to 40.3 wt% in methanol at 280 °C under 2 MPa H 2 for 6 h. The FT-IR analysis of products reveals that MoS 2 has a high activity for demethylation, dehydroxylation and alkylation, and the dimer conversions reveal that C-O and C-C bonds in EHL are broken with MoS 2 . The guaiacol and its derivants are identified as the intermediate for formation of TBC in EHL depolymerization according to the effect of time on product distribution and monomer conversion.
研究领域:
化学工程
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生物质能
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2023
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IF 5.6
Shui-Sen He,Ting-Ting Huang,Chao Chen,Yu Fan
A H 2 O 2 etching strategy was adopted to introduce coordinatively unsaturated sites (CUS) on MoS 2 -based catalysts for dibenzothiophene (DBT) hydrodesulfurization (HDS). The CUS concentrations on MoS 2 slabs were finely regulated by changing the concentrations of H 2 O 2 solution. With the increasing H 2 O 2 concentrations (0.1–0.3 mol/L), The CUS concentrations on MoS 2 slabs increased gradually. However, the high-concentration H 2 O 2 etching (0.5 mol/L) increased the MoO x S y and MoO 3 contents on MoS 2 slabs compared to etching with the H 2 O 2 concentration of 0.3 mol/L, which led to the less CUS concentration in the sulfided Mo–H-0.5 catalyst than in the sulfided Mo–H-0.3 catalyst. A microstructure-activity correlation indicated that the CUS introduced by H 2 O 2 etching on MoS 2 slabs significantly enhanced DBT HDS. Different Co loadings were further introduced into Mo–H-0.3, which had the most CUS concentration, and the corresponding 0.2-CoMo catalyst with the highest CoMoS content (3.853 wt%) exhibited the highest reaction rate constant of 6.95 × 10 −6 mol g −1 s −1 among these CoMo catalysts.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 14
·8055-8065
·
IF 3.119
Wenpeng Han,Shanmin Wang,Xuekuan Li,Ben Ma,Mingxian Du,Ligong Zhou,Ying Yang,Ye Zhang,Hui Ge
The effect of Fe, Co and Ni promoters on supported MoS2 catalysts for hydrogenation of nitroarenes were systematically investigated via experiment, characterization and DFT calculation. It was found that the addition of promoters remarkably improved the reaction activity in a sequence of Ni > Co > Fe > Mo. Meanwhile Ni promoted catalyst with the best performance showed good recyclability and chemoselectivity for a wide substrate scope. The characterization results revealed that the addition of promoters decreased the interaction between Mo and support and facilitated the reductive sulfidation of Mo species to produce more coordinated unsaturated sites (CUS). DFT calculations showed that the addition of promoters increased the formation of CUS, and enhanced the adsorption of hydrogen. The influence degree of promoters followed the sequence Ni > Co > Fe > Mo, which was consistent with those of the activities. Nitrobenzene hydrogenation and hydrogen activation occurred at the S and Mo edge, respectively. The adsorbed hydrogen diffused from the Mo edge to the S edge to participate in the hydrogenation reaction. Mechanism investigation showed that the main reason for increased activity by the addition of promoters was the increase of amounts of CUS and the secondary reason was the augmentation of intrinsic activity of CUS. The present studies give a new understanding for promoter modified MoS2 catalysts applied for hydrogenation of nitroarenes.
研究领域:
催化化学
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材料科学
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理论化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）