THIN SOLID FILMS
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2018
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IF 1.939
Hao Li,Sirong Yu,Jinhui Hu,Enyang Liu
In this research, a simple and economical method was used to fabricate a superhydrophobic Zn coating with ZnO nanosheets on steel substrates. Electrodeposited Zn coating was firstly formed on the steel substrate for anti-corrosion. Then we used hydrothermal method to process the electrodeposited Zn coating for in-situ growth of ZnO nanosheets. After low-energy modification with pentadecafluorooctanoic acid, the Zn coating with ZnO nanosheets on the steel substrate became superhydrophobicity, with water contact angle of 158° and the sliding angle of about 6°. The prepared superhydrophobic Zn coating with ZnO nanosheets exhibited good stability and excellent self-cleaning property. As a result, this combination method could be utilized in large scale production due to its simplicity and low-cost.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2017
·Vol. 41
·期 13
·5436-5444
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IF 3.269
Hao Li,Sirong Yu
A superhydrophobic Cu–Zn coating was fabricated on a steel surface by facile one-step electrodeposition, without being chemically modified by a low surface energy material. It was noted that three-level hierarchical structures, just like the surface morphology of a lotus leaf, were formed on the Cu–Zn coating surface via scanning electron microscopy (SEM) images. The water contact angle of the prepared Cu–Zn coating surface was 153.40°, and the sliding angle was less than 10°. From the aspect of chemical composition, it was characterized to confirm that the oxidation of Cu and Zn, and oxygen adsorption were the reasons for the superhydrophobicity. In terms of the surface morphology, based on the classical Wenzel and Cassie models, an idealized three-dimensional (3D) model was fabricated to demonstrate the rationality of the superhydrophobicity without chemical modification. Moreover, this three-level hierarchical Cu–Zn coating had stable superhydrophobicity, excellent self-cleaning properties, and stability.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
RSC Advances
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2022
·Vol. 12
·期 33
·21056-21065
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IF 4.036
Jie Jiang,Na Xie,Yilan Jiang,Jinghua Han,Guoying Feng,Zhongbing Shi,Changtao He
A new strategy was established for the degradation of wastewater-based organic pollutants. Laser-induced plasma (LIP) was used as an alternative UV light source to realise rapid photodegradation of methylene blue (MB), an organic pollutant. A conventional 1064 nm Nd:YAG laser was used for plasma excitation to degrade MB solutions. The results show that the LIP effectively degraded the organic matter, and the degradation efficiency was related to the UV component with wavelength less than 400 nm. The compositions of the plasma excited by different dielectric substrates are different owing to various mechanisms involving moderate heat dissipation and sonoluminescence. However, metallic substrates, especially Fe, can enhance the proportion of UV light and accelerate the degradation efficiency. In the process of methylene blue degradation, solution parameters, such as initial dye concentration, pH, irradiation time and hydrogen peroxide concentration, will affect the degradation efficiency. The conditions of effective degradation of methylene blue (10 mg L−1 MB−1 concentration, 50 mL L−1 H2O2 concentration, pH = 3 and P = 60 mW) were obtained in this study, which can provide reference for practical application.
研究领域:
环境科学
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光化学
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废水处理
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DOI
PubMed
高影响因子
RSC Advances
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2016
·Vol. 6
·期 61
·55936-55945
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IF 3.289
Ru Yan,Xiang Gao,Dandan Lv,Houyi Ma
Bis(2-ethylhexyl) phosphate (BEP) self-assembled thin films were prepared on iron substrates in water and ethanol solutions respectively and the formation mechanisms were investigated by means of attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). For the iron samples treated with BEP aqueous and alcoholic solutions, the appearance of characteristic functional groups in the ATR-FTIR spectra indicated the existence of BEP molecules on the iron surface. XPS results further demonstrated that, BEP molecules bound to the iron surface in different ways in the case of water and ethanol as solvents, leading to the formation of two types of self-assembled monolayers (SAMs). In the ethanol solution, the BEP SAMs formed on the iron surface by both electrostatic interaction and chemical covalent binding, denoted as BEPE SAMs; in the aqueous solution, the BEP SAMs formed on the iron surface only through P–O–Fe (substrate) bond between iron substrate and BEP molecules, denoted as BEPW SAMs. The BEPE SAMs showed an island-like surface morphology, while BEPW SAMs had a nodule-like appearance. When used as ultrathin coatings for corrosion protection, the great differences in microstructure, morphology and compactness between the two BEP SAMs had a strong influence on their anti-corrosive properties, which in turn led to an interesting phenomenon that BEPW SAMs showed much better corrosion protection ability than BEPE SAMs under otherwise identical conditions.
研究领域:
材料科学
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表面化学
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腐蚀与防护
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DOI
高影响因子
Nanoscale
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2015
·Vol. 8
·期 3
·1555-1564
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IF 7.394
Xiang Gao,Ke Lu,Lei Xu,Hua Xu,Haifeng Lu,Feng Gao,Shifeng Hou,Houyi Ma
A novel, highly effective and environmentally friendly film-forming material, phytic acid (PA)/silane (denoted as PAS) hybrid with a three-dimensional (3D) network structure, was prepared through a condensation reaction of PA with methyltrihydroxysilane generated from the hydrolysis of methyltriethoxysilane (MTES). Two kinds of PAS-based pretreatment layers, namely NaBrO3-free and NaBrO3-doped PAS layers, were fabricated on iron substrates using the dip-coating method. SEM and AFM observations showed that the as-fabricated PAS-based layers possessed a 3D porous microstructure at the nanoscale and a rough surface morphology. X-ray photoelectron spectroscopic (XPS) and attenuated total reflection infrared (ATR-IR) spectroscopic characterization demonstrated that the above PAS layers bound to the iron surface via the –P–O– bond. Moreover, analyses of steady-state polarization curves and electrochemical impedance spectroscopic (EIS) data indicated that the corrosion rates of the iron substrates decreased considerably in the presence of the two PAS-based pretreatment layers. In particular, the NaBrO3-dosed PAS layer displayed the better corrosion resistance ability as well as maintaining the original microstructure and surface morphology. The PAS-based pretreatment layers are expected to act as substitutes for chromate and phosphate conversion layers and will find widespread application in the surface pretreatment of iron and steel materials due to the advantages of being environmentally friendly, the rapid film-forming process, and, especially, the nanoporous microstructure and rough surface morphology.
研究领域:
材料科学
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表面工程
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腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2025
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IF 7.9
Yaoxia Yang,Yu Zhang,Biaobiao Lu,RuiRui Zhang,Fuxing Zhou,Dongfei Sun,Xiaozhong Zhou,Zhiwang Yang,Ziqiang Lei
Designing and preparing bifunctional fully hydrated electrocatalysts through interface engineering and valence state modulation is an effective method to reduce the catalytic energy barriers for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). However, developing and constructing efficient, low-cost non-precious metal mixed catalysts pose significant challenges, especially in terms of metal electronic configuration and structural control. In this study, we prepared a nanoflower heterostructure array of copper iron sulfide and cobalt iron layered double hydroxide by copper doping and in-situ sulfurization of dynamically protected iron substrates. The construction of this heterostructure exposes more catalytic active sites and optimizes the electron arrangement of the catalyst, significantly enhancing the superhydrophilicity/superaerophobicity of the electrocatalyst and improving its catalytic activity and stability during the OER and HER processes. Density functional theory (DFT) calculations indicate that the synergistic regulation of cobalt and copper, along with the optimization of the sulfide, reduces the free energy required for OER intermediate adsorption, adjusts the surface electronic structure of the material, promotes electron transfer between the heterostructures, and accelerates the kinetics of the catalytic reaction. As a result, the prepared catalytic material exhibits excellent electrocatalytic performance for both OER and HER, requiring overpotentials of 285 mV and 72 mV, respectively, to achieve a current density of 10 mA cm −2 in an alkaline electrolyte (1 M KOH solution). The assembled electrocatalytic water splitting cell operates at a low voltage of only 1.53 V. This study provides an attractive approach for the future design of efficient water splitting electrocatalysts.
研究领域:
材料科学
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电化学
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纳米技术
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催化
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能量转换
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）