MOLECULES
·
2023
·Vol. 28
·期 17
·6187
·
IF 4.6
Le Xu,Jiateng Chen,Pengcheng Zhao,Boxiong Shen,Zijian Zhou,Zhuozhi Wang
To promote the practical application of TiO2in photocatalytic toluene oxidation, the honeycomb aluminum plates were selected as the metal substrate for the loading of TiO2powder. Surface-etching treatment was performed and titanium tetrachloride was selected as the binder to strengthen the loading stability. The loading stability and photocatalytic activity of the monolithic catalyst were further investigated, and the optimal surface treatment scheme (acid etching with 15.0 wt.% HNO3solution for 15 min impregnation) was proposed. Therein, the optimal monolithic catalyst could achieve the loading efficiency of 42.4% and toluene degradation efficiencies of 76.2%. The mechanism for the stable loading of TiO2was revealed by experiment and DFT calculation. The high surface roughness of metal substrate and the strong chemisorption between TiO2and TiCl4accounted for the high loading efficiency and photocatalytic activity. This work provides the pioneering exploration for the practical application of TiO2catalysts loaded on the surface of metal substrate for VOCs removal, which is of significance for the large-scaled application of photocatalytic technology.
研究领域:
环境科学
·
材料科学
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DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Haijie Chen,Zhiwen Zheng,Hongxiang Yu,Xiaolong Liu,Dan Qiao,Dapeng Feng,Zenghong Song,Jian Zhang
Friction and wear seriously affect the performance, service life and stability of metal moving parts. In this work, a novel GO composite film grafted with POCl 3 was fabricated on metal substrates, including SS, Ti and Al. These films showed excellent tribological properties, including high carrying capacity, low friction coefficient (COF) and low wear volume on the macroscale. A tribofilm composed of GO nanoflakes and metallic phosphate was formed in the wear track of SS substrate. In addition, amorphous carbon and metallic phosphate were the main components of the transfer layer formed on the surface of the steel ball. The excellent tribological properties were dominated by GO, and the great wear resistance was attributed to the formation of metallic phosphates during the friction process. Simulation results showed that the oxygen of metallic phosphate was derived from GO modified with POCl 3 rather than air. Taking the synergistic effect of GO and POCl 3 into account when designing nanocomposite films is of great value in industrial applications.
研究领域:
材料科学
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摩擦学
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表面工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 7
·5364-5379
·
IF 2.993
Xu Zhe,Jiang Deyi,Wu Fei,Guo Xiaogang,Wei Zhibo,Chen Jie
A simple electrophoretic deposition method followed by stearic acid modification was developed to prepare superhydrophobic multiscale nano-aluminum films on a series of metal substrates such as nickel, copper, titanium and stainless steel. The surface morphology and chemical compositions were characterized by a field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscope, Fourier-transform infrared spectrophotometer and white light interferometer. The resultant nano-aluminum films exhibited excellent superhydrophobicity with a water contact angle of 168.5° and a water sliding angle of 2°. Furthermore, the obtained nano-Al films showed the desirable stability and durability after the related testing. In addition, the impact dynamic behaviors of water droplet on the superhydrophobic nano-Al films were described via the corresponding parameters, such as Weber number ( We ), spreading factor ( β ), contact time ( t c ), etc. Based on these characteristics, the superhydrophobic nano-Al films presented excellent water-repellent property. The EPD process is an efficient method to prepare superhydrophobic nano-Al films on common engineering metal materials, which can be applied to various industrial or manufacturing fields, including oil–water separation, anti-icing, self-cleaning, anti-corrosion, microelectronic fabrication and so forth.
研究领域:
材料科学
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表面工程
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DOI
高影响因子
Journal of Coatings Technology and Research
·
2023
·Vol. 20
·期 5
·1513-1527
·
IF 2.3
Yao Hongrui,Bi Wenya,Yin Xu,Mu Shenglong,Sha Shiqiang,Wang Na
In this work, h-BN@STPP was successfully obtained by facile co-modification of sodium tripolyphosphate (STPP) and silane coupling agent (KH-550) on h-BN nanosheets, with waterborne epoxy coatings incorporated for metallic substrate corrosion protection. Results showed that the impedance modulus at the lowest frequency ( Z f = 0.1 Hz ) of h-BN@STPP composite coating increased three orders of magnitude in comparison with neat waterborne epoxy coating, exhibiting outstanding corrosion resistance. The reinforced anticorrosion performances of h-BN@STPP composite coatings could be attributed to the “labyrinth effect” of h-BN and passivation effect of STPP on the metal substrates. Graphical abstract
研究领域:
材料科学
·
腐蚀与防护
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DOI
高影响因子
CORROSION SCIENCE
·
2017
·
IF 5.245
Mingjun Cui,Siming Ren,Songlv Qin,Qunji Xue,Haichao Zhao,Liping Wang
Hexagonal boron nitride (h-BN), a structural analogue of graphene, is a better alternative for anticorrosive coatings because of its electrical insulation properties. In this work, few-layer h-BN nanosheets are obtained by the exfoliation of stacked h-BN powders with poly(2-butyl aniline) (PBA) and incorporated into epoxy coatings for protecting metallic substrate against corrosion. Results show that as prepared composite coatings exhibit high impedance modulus and low water absorption, suggesting their superior performance of corrosion protection owing to the “labyrinth effect” of h-BN and passivation effect of PBA on the metal substrates.
研究领域:
材料科学
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腐蚀与防护
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Hujing Ling,Qiang Yuan,Tian Sheng,Xun Wang
Exploring suitable dual active site and metal–substrate interface effect is essential for designing efficient and robust electrocatalysts across a wide pH range for the hydrogen evolution reaction (HER). Herein, alloyed platinum–ruthenium clusters supported on nanosheet-assembled molybdenum carbide microflowers (PtRu/Mo 2 C) are reported as efficient pH-universal electrocatalysts for HER. Due to dual active site and metal–substrate interface effect, the optimized Pt 0.83 Ru 0.17 /Mo 2 C electrocatalyst exhibits extremely low overpotentials (η 10 ) of 9, 19, and 33 mV to deliver 10 mA cm −2 in 0.5 M H 2 SO 4 , 1.0 M KOH, and 1.0 M phosphate buffered electrolytes (PBS), outperforming the benchmark Pt electrocatalyst. In addition, Pt 0.83 Ru 0.17 /Mo 2 C achieves excellent stability of 200 h at a big current density of 500 mA cm −2 in the anionic exchange membrane water electrolyzer. Density functional theory (DFT) calculations and in situ Raman spectra reveal that the interaction of PtRu clusters with Mo 2 C substrate, while Ru modulates the electron cloud density of Pt, thus accelerating H 2 O dissociation and H* desorption on the surface of Pt 0.83 Ru 0.17 /Mo 2 C and thus synergistically enhancing the HER kinetics. The research opens up an efficient strategy to exploit cost-effective, high-performance, and pH–universal HER electrocatalyst while facilitating green hydrogen energy development.
研究领域:
材料科学
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电化学
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催化科学
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 39
·6899-6908
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IF 3.545
Huimin Wang,Tingting Wang,Zibin Huang,Yizhuo Liu,Dehui Leng,Junli Wang
The growth of metal chalcogenide nanowires (NWs) on metal substrates is challenging work since the direct reactions taking place between the chalcogen (S, Se or Te) and zero-valent metal (M0) are frequently unable to regulate the crystallization of nanocrystals in an anisotropic one-dimensional (1D) manner. We here report the use of Ag2Se seeds as catalyst particles to realize the growth of metal selenide (MSe) NWs on their respective metal foil or flakes, including ZnSe/Zn, CdSe/Cd, and MnSe/Mn material systems. Metal foil or flakes (M = Zn, Cd and Mn) serve as a support substrate as well as a metal cation source during the NW synthesis. The preformed Ag2Se seeds play the roles of not only catalytic particles that initiate a so-called solution–solid–solid process to produce crystalline MSe NWs on metal substrates, but also inert impurities that promote an electrochemical anodic reaction of the metal to supply metal cations (M0 − 2e → M2+) for the NW formation. The microstructural studies by HRTEM reveal the polytypism and particularly the diameter-dependence of crystal phases and growth directions in the resulting MSe NWs, which can be rationalized from the viewpoints of the energetics and the catalyst/NW interfacial structures. These semiconductor NWs grown on metal foil or flakes may find wide use in photoelectric catalysis and devices without a transfer process of free-standing NWs onto a conductive support substrate.
研究领域:
材料科学
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纳米技术
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半导体物理
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DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 2
·1-9
·
IF 5.479
Jiang Ningjing,Hu Yongjun,Wei Wei,Zhu Tingfeng,Yang Kang,Zhu Guichi,Yu Meng
A surface-enhanced Raman scattering (SERS) method is described for the determination of microRNA that is associated with various forms of cancer. The substrate consists of functionalized gold-silver bimetallic structure, and the sensitivity is strongly enhanced by making use of a re-circulated enzymatic amplification system (REAS). Poly-dopamine acts as both a reductant and a protective of the substrates. It was employed to link the gold core and silver satellite. The unique “hot spots” consisting of a Au@PDA@Ag nanocomposite improve the Raman signal and sensitivity. The reductive feature of PDA can prevent the susceptible oxidation of metallic silver to maintain the high Raman activity. To improve the sensitivity of the assays, a re-circulated enzymatic amplification system was developed in which the nicking endonuclease triggers the nucleic acid reaction system to enter an amplified cycle. By integrating the bimetallic nanosubstrate and magnetic separation into the REAS, microRNA can be detected by SERS (best at the Raman band of 1586 cm −1 ) with a limit of detection as low as 0.2 fM. In our perception, the assay provides an exciting new avenue to study the expression of tumor genes. Thus, it holds vast promise in cancer diagnosis.
Schematic presentation of the SERS method based on poly-dopamine mediated bimetallic SERS substrate and re-circulated enzymatic amplification.
研究领域:
分析化学
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分子生物学
·
癌症研究
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Peng Li,Lin Zhu,Chao Ma,Lixia Zhang,Lin Guo,Yawen Liu,Hao Ma,Bing Zhao
The surface-enhanced Raman scattering (SERS) research is in full swing owing to its high sensitivity and high selectivity; however, the substrates with superexcellent performance for SERS are largely confined to noble metals (Au, Ag, etc.). Although the SERS active substrates have been extended to semiconductors and transition metals, it is frustrating that their sensitivities are insufficient for widespread practical application. Here, we report the plasmonic molybdenum tungsten oxide (MWO) hybrid nanomaterials (NMs), which can be used as high-performance substrates with SERS comparable to that of noble metals. MWO NMs can achieve the trace detection of rhodamine 6G (R6G), basic fuchsin (BF), and oil red O (ORO). The detection limit concentration for R6G is 10–8 M, with the maximum enhancement factor of up to 6.09 × 107. The superexcellent SERS performance was attributed to the cooperative enhancement effect of electromagnetic (EM) enhancement mechanism and the charge transfer (CT) mechanism. Moreover, in the proposed system, the EM and CT contribution was distinguished by employing poly(vinylpyrrolidone) (PVP), which serves as a barrier layer to prevent the CT process from MWO NMs to R6G. These remarkable MWO NMs can be obtained with a facile method, and this research provides new insight into non-noble metal based SERS substrate.
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Siyuan Zheng,Hao Liu,Zhaohao Wei,Rui Hu,Kang Cheng,Xi Bian,Wei Wang,Le Wang,Yongchao Lai
Surface-enhanced Raman spectroscopy (SERS) is a highly sensitive analytical technique with great potential for application in surface screening due to its outstanding molecular detection capabilities. However, conventional flexible SERS substrates encounter challenges related to high intrinsic Raman background and low thermal conductivity. In this paper, a novel all-metal flexible SERS substrate (MF-SERS) with uniform plasma nanostructures, high SERS performance, low intrinsic Raman background, and excellent thermal conductivity was prepared by means of wet chemistry using commercially available copper foil as support material. The multifaceted MF-SERS has been demonstrated to expedite the screening of surface contaminants (e.g., pesticide residues) across diverse substrates, including fruits, slides, metal mobile phone housings, and plastic food packaging. This offers a robust solution for expeditious surface screening and sheds light on the development and application of new analytical methods.
研究领域:
分析化学
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纳米技术
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传感器与检测
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环境监测
·
食品安全
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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）