ACS Applied Nano Materials
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2024
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IF 5.3
Yuan Ma,Tong Li,Si-Rui Zhao,Zhou-Tao Feng,Jin-Ku Liu
This study enhanced the corrosion protection of zinc molybdate (ZnMoO4) in epoxy coatings by integrating ZIF-8 to form a Z-type nano heterojunction. The heterojunction leveraged the light absorption properties of organic ligands within ZIF-8 to significantly promote the excitation and separation efficiency of photogenerated carriers, thereby enhancing the photocathodic protection capability of the coating. It also utilized a cocrosslinking curing process between the epoxy functional groups and the organic functional groups of ZIF-8, resulting in a notable improvement in coating density. Furthermore, the metal–organic framework (MOF) effectively anchored the coating, preventing the recurrence of defects due to molybdate dissolution, thus enhancing durability. In synergy with the molybdate passivation film, it effectively hindered the corrosive attack of ions adsorbed on the metal substrate surface, thereby contributing to the suppression of chemical corrosion. Meanwhile, the compositing of MOF significantly enhanced the hydrophobicity of the material. Experimental data demonstrated that the impedance of the ZIF-8/ZnMoO4 composite coating achieved a remarkable increase to 226.0 and 208.3% compared to pure epoxy and ZnMoO4 coatings, which provided insights into expanding the compatibility and synergistic protective performance of molybdate-based corrosion-resistant materials by constructing heterojunctions between organic and inorganic materials.
研究领域:
材料科学
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腐蚀防护
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
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IF 3.133
Yong-Ping Gao,Ke-Jing Huang,Chen-Xi Zhang,Shuai-Shuai Song,Xu Wu
Flower-like zinc molybdate (ZnMoO 4 ) has been prepared by using a facile hydrothermal method . The ZnMoO 4 nanoflowers are characterized by X-ray diffraction, Raman spectroscopy , X-ray photoelectron spectroscopy, transmission electron microscopy and scanning electron microscope techniques. The as-prepared material is evaluated as electrode materials for high-performance supercapacitors by cyclic voltammogram, galvanostatic charge-discharge and electrochemical impedance spectroscopy . In 2.0 M KOH electrolyte, the ZnMoO 4 nanoflowers display a high specific capacitance of 704.8 F g −1 (three-electrode system). Moreover, the ZnMoO 4 nanoflowers can reach up to 568.3 F g −1 at 5.0 A g −1 , and approximately 93.6% of the capacitance is retained after 10000 cycles at 8.0 A g −1 . A symmetric supercapacitor is fabricated based on ZnMoO 4 nanoflowers and activated carbon, and a specific capacitance of 63.13 F g −1 is obtained at 1.0 A g −1 with a high energy density of 22.45 Wh kg −1 at power density of 800.06 kW kg −1 . The good electrochemical performance of ZnMoO 4 nanoflower not only is due to its unique nanostructures with large specific surface area, but also its excellent conductivity, which facilitates efficient charge transport and promotes electrolyte diffusion. These results indicate that the ZnMoO 4 nanoflower may be a promising electrode material for energy storage applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2021
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IF 13.084
Ran Wang,Yanting Liu,Guangyi Li,Aiqin Wang,Xiaodong Wang,Yu Cong,Tao Zhang,Ning Li
Methylcyclopentadiene (MCPD) is a widely utilized intermediate in the synthesis of advanced aviation fuels and valuable chemicals. However, the low yield from fossil energy and the high price of MCPD greatly limit its application on a large scale. To fulfill the increasing market demand of MCPD, it is imperative to explore efficient and integrated technologies for the production of renewable MCPD from low cost and more available biomass. In this work, Zn3Mo2O9 was obtained via a simple precipitation method and demonstrated excellent catalytic performance for the direct synthesis of MCPD with 2,5-hexanedione (HD), a platform compound that can be directly produced by the selective hydrogenolysis of cellulose. Over it, a good molar yield of MCPD (65%) was obtained by the cascade intramolecular aldol condensation/selective hydrodeoxygenation reaction at 400 °C under atmospheric pressure. On the basis of the characterization results, the Zn3Mo2O9 catalyst has a higher specific BET surface area than the rest of the catalysts, which are favorable for the adsorption and mass transfer of the reactant. Meanwhile, the Zn3Mo2O9 catalyst also has relatively higher reducibility that will lead to the emergence of more oxygen vacancies (or Mo5+ species) under the investigated conditions. All of these characteristics lead to higher activity, better selectivity, and good stability of the Zn3Mo2O9 catalyst in the direct conversion of HD to MCPD. Because of its excellent hydrodeoxygenation performance, the Zn3Mo2O9 catalyst can also be used as the catalyst for the direct production of renewable dienes with other biomass-derived α,β-unsaturated ketones.
研究领域:
化学工程
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催化材料
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Tong Li,Yuan Ma,Jin-Ku Liu,Ji-Chang Liu,Zhen-Xue Liu,Yun-Sheng Ma,Peng-Peng Liu
The design of heterojunction materials is a practical but challenging subject in the corrosion protection field. With the in-situ growth strategy, the zinc-aluminium layered double hydroxides (LDH) nanoflakes were bound tightly on the surface of zinc molybdate (ZMO). The mechanism of corrosion protection was researched systematically. The electron-hole pair separation efficiency enhanced by forming the Z-scheme heterojunction structure provided photoinduced electron protection and retarded corrosion process. Benefit from the stacked lamellar and the hydrogen bond effect, which improved the compactness and compatibility of coating, the multi-level shielding effect prevented the permeation of corrosive media. Moreover, the anion traps consisted of the interlayer corridor structure in the LDH and the corrosion inhibition ability of molybdate synergistically granted the composite epoxy coating with better protection performance. Furthermore, the addition of ZMO-LDH could also enhance the mechanical strength and the elasticity modulus of epoxy samples, which reached to 130.7 % and 148.6 % of the neat epoxy resin . The electrochemical test results exhibited that the total impedance value of ZMO-LDH composite coating respectively increased by 322.9 %, 184.7 % and 117.6 % respectively compared with the epoxy resin coating, zinc molybdate coating and zinc-aluminium layered double hydroxides coating, showing heterojunction material had the best electrochemical corrosion protection performance. Herein, constituting heterojunction materials with suitable energy band and compact structure can effectively improve electrochemical corrosion protection and physical durability, which has reference values for designing anticorrosion heterojunction materials.
研究领域:
材料科学
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腐蚀与防护
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电化学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2022
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IF 6.206
Ziheng Bai,Yue Sun,Cheng Li,Meng Zhang,Yexiang Cui,Yanji Zhu,Huaiyuan Wang
Traditional coatings struggle to match the maritime industry's long-term anti-corrosion needs due to the severe marine environment. As a result, integrating functional fillers into coatings is a viable solution to this issue. The sericite (SC) was modified with polyethyleneimine (PEI) as a “binder” and zinc molybdate (ZM) as an “additive” in this study. Following that, a new SC/PEI@ZM filler with self-responsive performance was synthesized effectively. The experimental results demonstrated that the |Z| 0.01Hz value of the SC/PEI@ZM coating remained above 8.39 × 10 10 Ω·cm 2 after being immersed in 3.5 wt% NaCl solution at atmospheric pressure for 60 days. In particular, the coating still maintained favorable corrosion resistance after 7 days immersion under 3 MPa pure O 2 . The higher corrosion resistance of SC/PEI@ZM coating is mainly attributed to the barrier effect and the complex protective film formed by Zn 2+ /MoO 4 2− on the surface of the substrate.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2022
·Vol. 25
·期 3
·1056-1066
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IF 11.034
Fengan Han,Yanting Liu,Guangyi Li,Lin Yuan,Aiqin Wang,Feng Wang,Tao Zhang,Ning Li
Selective hydrodeoxygenation (HDO) of lignocellulose-derived ketones to olefins is a promising method for upgrading lignocellulosic biomass-derived molecules. Herein, zinc molybdate (ZnMoO4–E) with a disordered layered stacking structure was first prepared using a facile and environmentally friendly evaporation method and it exhibited outstanding catalytic performance for the selective HDO of lignocellulose-derived ketones to olefins. Using it, 4-heptanone, a representative of lignocellulose-derived ketones, was totally converted, and a high carbon yield of heptene (90%) was achieved at 673 K. On the basis of the characterization results, the outstanding catalytic performance of ZnMoO4–E was attributed to its porous structure, higher oxygen vacancy (or the Mo5+ species) concentration and higher acidity. Analogously, ZnMoO4–E also exhibited good catalytic performances for the selective HDO of other lignocellulose-derived ketones (such as acetone, butanone, 2-pentanone, 3-pentanone, cyclohexanone, acetophenone and 5-nonanone) to their corresponding olefins.
研究领域:
催化
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化学工程
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材料科学
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可再生能源
✓ 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）