NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 39
·期 6
·4860-4868
·
IF 3.086
Li Hao,Yu Sirong,Han Xiangxiang
Inspired by the self-cleaning property of the lotus leaf surface, a novel biomimetic coating with superhydrophobicity is introduced in this article. Moreover, the morphologies, crystal structures and chemical composition of the specimens were investigated using field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR). After electrodeposition of the Zn coating, a ZnO coating with micro and nano structures (perpendicular to the substrate surface) was obtained on an X90 pipeline steel surface after it was processed with the appropriate hydrothermal treatment time. The water contact angle (CA) of the ZnO coating, which had upright micro and nano structures, was about 137.85° without chemical modification. After further modification with a low-surface-energy material, the ZnO coating presented superhydrophobicity with the water CA of 157.59° and the sliding angle (SA) was less than 10°. Therefore, this study changed the traditional application of the deposited coating that was mostly used as a protective layer and might open up a new application field for deposited metal coatings to fabricate microstructures with functional applications, including superhydrophobic coatings.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Chao Zhang,Ying Li,Guifang Liu,Kewei Liu,Kaidi Wu
NO 2 emission is currently one of the important factors threatening the quality of life of residents. Preparing ZnO-based gas sensors to monitor the concentration of NO 2 has attracted growing attention. This article reports a method for preparing ZnO 1-α by hydrogen heat treatment. The ZnO coating prepared by the spin coating method is directly placed in a reduced atmosphere with 3% hydrogen for heat treatment to produce a self-doped ZnO 1-α coating with oxygen vacancies , which can effectively narrow the bandgap. The article studied the influence of heat treatment time and visible light wavelength on sensing properties. The results show that under the conditions of room temperature and blue light irradiation, the coating heat-treated in a reduced atmosphere for 1 h showed the best gas-sensing properties to 1 ppm NO 2 with a response of 7.0. The outstanding selectivity of ZnO 1-α coating has been displayed.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Ying Liu,Lian Zhang,Jing Hu,Bo Cheng,Junlong Yao,Yong Huang,Hao Yang
Transparent superhydrophobic coating has been widely investigated for their great potential applications in self-cleaning windows, solar panels, lenses, and optoelectronic devices. Herein, we reported a robust ZnO coating with high transmittance and superhydrophobicity, which was prepared by a facile sol-gel method and post-modification with hexadecyltrimethoxysilane. To well control the surface morphology and roughness of the ZnO coating, CTAB was added in the precursor. When the concentration of Zn 2+ was 1.2 mol/L, and the ratio of CTAB/Zn 2+ was 0.1, the prepared ZnO coating showed 91.2 % transmittance at a wavelength of 600 nm. A drop of water with a near spherical shape on the coating exhibited a water contact angle of 162.0° ± 1.7° and rebounding back and forth for 7 times in 260.3 ms. Moreover, the ZnO coating shows remarkable stability against water dripping impact, sand impact abrasion and scratching test, while retaining its superhydrophobicity. Furthermore, the ZnO coating also shows self-cleaning, UV-blocking and anti-bioadhesion properties. The prepared transparent superhydrophobic ZnO coating may open a new gate to a variety of practical applications, including windshields, eyeglasses, windows for tall buildings and medical glass, ect.
研究领域:
材料科学
·
表面化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2024
·Vol. 76
·期 8
·3994-4005
·
IF 2.1
Li Weishun,Yun Hong,Dai Wenjing,Wang Baofeng,Xu Qunjie
Phosphoric acid etching combined with hydrothermal treatment was used to construct a Sc 2 O 3 -ZnO coating on the Zn anode surface to tune the content of Zn (002) crystal surface. The (002) crystalline surface of Zn surface became the preferred crystal face for the H 3 PO 4 etching time of 7 min and hydrothermal reaction for 2 h at 160°C. The polarization curve results showed that in 2 M of ZnSO 4 solution, the corrosion potential of Zn anode with (002) crystallographically optimal orientation was positively shifted by 663 mV and the corrosion current density was reduced by about four orders of magnitude compared with the bare Zn. The results of LSV and XRD showed that the Zn anode with (002) preferred crystal face possessed a more negative hydrogen evolution potential, which effectively hindered the occurrence of the H 2 evolution side reaction and significantly inhibited the corrosion of metal Zn and the generation of alkaline zinc sulfate hydrate as a byproduct. Dense Sc 2 O 3 -ZnO coatings composed of crosslinked nanofibers provided a long-lasting and effective shielding protection. The coating facilitated the induction of Zn (002) crystal face oriented deposition, and the bonding of N or P enhanced the stability of coating, which significantly enhanced the corrosion resistance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Chuanbo Hu,Ying Li,Tingzhen Li,Yongquan Qing,Jianting Tang,Huawei Yin,Lei Hu,Lei Zhang,Yongsheng Xie,Kangning Ren
In this investigation, a comparative study on the anticorrosion properties of poly( N -methylaniline) (PNMA) coating, as well as PNMA-ZnO and PNMA/SiC-ZnO bilayer coatings, was carried out. The polymeric materials (PNMA and PNMA/SiC composite) were synthesized by emulsion polymerization method. The structures of the obtained polymeric materials were determined by different optic techniques, and the electrochemical activity and stability were examined by cyclic voltammetry . Subsequently, PNMA was spread on the surfaces of carbon steel and ZnO coating by chemical deposition method, and PNMA/SiC was spread on the surface of ZnO coating, which led to obtaining PNMA coating, PNMA-ZnO and PNMA/SiC-ZnO bilayer coatings. The structures of ZnO coating were characterized by X-ray diffraction and energy dispersive spectrometer, and the surface morphologies of all the coatings were also studied by field emission scanning electron microscopy . The anticorrosion properties of all the coatings were evaluated by electrochemical corrosion and accelerated immersion in the presence of a 3.5% NaCl solution. The results demonstrated that the polymeric materials-ZnO bilayer coatings had excellent corrosion protection ability, and in specific, for the carbon steel protected by PNMA/SiC-ZnO bilayer coatings it was higher than PNMA-ZnO bilayer coatings, with a corrosion rate of 0.004 mm/year and the protection efficiency was up to 97.43%. Overall, this study proves that the rough ZnO coating is beneficial to the embedding and pinning of polymeric materials, and the formed PNMA/SiC-ZnO bilayer coatings possess a strong adsorption ability and wide coverage area to the carbon steel substrate, which facilitates the external PNMA/SiC film to develop its unique barrier and passivation effects to prevent carbon steel from being corroded. The protection mechanism conferred by polymeric materials-ZnO bilayer coatings has also been discussed.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 18
·185301
·
IF 3.551
Kuan Chen,Yi Liu,Yaoyao Fu,Jing Huang,Xiaohua Feng,Jiang Wang,Mengjiao Zhai,Rocco Lupoi,Shuo Yin,Hua Li
It is known that ZnO is an n-type semiconductor with photocatalytic performances under ultraviolet light irradiation. Constructing a superior structure for a modified electron band has been one of the major research goals for photocatalytic ZnO. Here we report a new technical route for making nano-ZnO coatings with a porous topographic morphology. The coatings were fabricated by plasma spraying the mixture of suspension and solution liquid precursors. Pre-loading of ZnO and Zn powders in the precursor was carried out for the purpose of tailoring the structure of the coatings. The coatings in micron thicknesses showed a porous skeleton and a fluffy top layer consisting of ultrafine ZnO grains. Photocatalytic testing by measuring the degradation of methylene blue revealed significantly enhanced activities of the coatings deposited using the ZnO/Zn loaded precursor. The hybrid-structured ZnO coatings exhibited a narrowed band gap and modified oxygen defects as compared to those deposited from the single liquid feedstock. The results shed light on a one-step easy thermal spray fabrication of polytropic nanostructured functional coatings by employing solid powder-loaded liquid as the starting feedstock.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Hang Qin,Hui Zhou,Wenming Guo,Feiyang Yan,Hanning Xiao
A modified layer of ZnO coating with the thickness of about 0.57 μm has been uniformly deposited on carbon cloth by microwave-assisted modification technology for reversing the wettability of carbon cloth, resulting in the fabrication of ZnO/CC Mem. The inherent properties of carbon fibers absorbing microwave radiation and converting it into volumetric heating contribute to the uniform deposition of ZnO modified coating on carbon cloth. After modification, the WCA of as-prepared ZnO/CC Mem is 0° while the corresponding UWOCA is up to 158.4 ± 1.1°, exhibiting the excellent superhydrophilicity/underwater superoleophobicity. In the process of gravity driven oil-water separation, a high filtrate flux about 18,625 ± 100 L/(m 2 h), is found in the separation of oil-water mixture, and the corresponding separation efficiency is 99.9%; While for the treatment of simulated kitchen oily wastewater, a bilayer ZnO/CC Mem is used. The corresponding filtrate flux and separation efficiency are 15,880 ± 100 L/(m 2 h) and 99.8%, respectively. In addition, the fouled ZnO/CC Mem could restore the virgin performance by a simple cleaning process.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2020
·
IF 2.717
Wentao Hu,Xi'an Fan,Zigui Luo,Fan Luo,Guangqiang Li,Jian Wang
In this work, Fe/ZnO soft magnetic composite (SMC) is prepared successfully by sol-gel method combined with a pyrolysis process. Formation mechanism and effect of annealing on magnetic properties for the Fe/ZnO SMCs are studied in detail. The results show that Fe/zinc acetate hydrogel mixture will be decomposed into the Fe/ZnO composites by heating above 340 °C. And ZnO is well coated on the surfaces of Fe particles. The Fe/ZnO composite compact has lower total core loss and better frequency stability of magnetic permeability compared with pure Fe compact. In addition, annealing treatment shows an enhanced effect on the magnetic properties for the Fe/ZnO composite compact such as reduced coercivity and increased permeability. The annealed Fe/ZnO SMCs can keep stable magnetic permeability (26) from 50 Hz to 10 kHz, high magnetic induction (1.65 T) and a relatively low core loss of 91.11 kW/m 3 measured under a magnetic flux density of 30 mT at 10 kHz. Therefore, the Fe/ZnO soft magnetic composites prepared by the above-mentioned method provide a great potential application in electromagnetic conversion equipment.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Linfeng Li,Yaoqi Huang,Wenbin Li,Liyi Zou,Xi Wu,Yuanyuan Li,Xiaomin Cheng
Microencapsulated phase change materials (MEPCMs) have different thermal conductivity requirements under various application conditions. Organic-shell MEPCMs currently dominate the microcapsule due to their easy availability. The aim of this paper is to regulate the thermal properties, especially the thermal conductivity, of organic-shell microcapsules. Herein, with the precision and uniformity of atomic layer deposition (ALD) coating, the thickness of ZnO coating is controlled on the surface of paraffin @ polymethyl methacrylate (PMMA) to realize the regulation of thermal properties of MEPCMs. The experimental results illustrate that the introduction of ALD ZnO shell abates the phase transition enthalpy of MEPCM, but it realizes the optimization of thermal stability and phase transition reversibility for MEPCMs, which is confirmed by the mechanical test results of microcapsules. Furthermore, it is particularly worth mentioning that the thermal conductivity of MEPCM can be adjusted from 0.16 to 1.99 W m −1 K −1 within the ALD cycle range given in this research. The equivalent thermal conductivity of MEPCM was verified by calculation, and the relationship between ALD treatment and thermal conductivity was obtained. This research provides a strategy for accurately regulating the thermal conductivity of phase change microcapsules, breaking through the bottleneck in the application of microcapsules.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·
IF 3.9
Renhan Li,Gongxun Bai,Hongbin Zhang,Enhai Song,Jiasong Zhang,Denghao Li,Junjie Zhang,Shiqing Xu
As an environment-friendly powder with good coloring performance, rare earth sulfide is one kind of the important choices to replace cadmium and lead colorants. In particular, γ-Ce 2 S 3 belongs to rare earth sesquisulfide, which has a bright red color. However, the uncoated γ-Ce 2 S 3 is easy to decompose and release H 2 S in a humid or acidic environment, and its air thermal stability is limited to 350°C. In this work, γ-Ce 2 S 3 powders coated with zinc oxide were prepared by heterogeneous precipitation method, and a dense protective layer was formed by ZnO to improve chemical and thermal stability. Moreover, silicon dioxide was deposited on the surface of the zinc oxide coating using the microemulsion process to strengthen the powder's acid resistance. The double shells structure greatly promoted thermal stability and acid resistance of γ-Ce 2 S 3 powders. The results showed that rare earth sulfide powders with double shells have good stability for coloring applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 39
·期 1
·151-158
·
IF 2.726
Wang Xiaonan,Wang Bohan,Lai Hua,Cheng Zhongjun
R ecently, surfaces with intelligent wetting controllability have aroused increased attention. Endowing the surface with stimuli-responsive surface chemistry and tunable surface microstructure can achieve a surface with smart wetting performances. However, almost all existing surfaces only focused on single surface chemistry or micromorphology, thus to achieve smart multiple wetting regulation is still difficult. Herein, we report a ZnO coated shape memory polymer(SMP) surface, and the surface chemistry and micromorphology can be synergistically regulated. ZnO can provide adjustable surface chemistry under UV irradiation, and SMP can offer tunable micromorphology due to its shape memory effect(SME). Based on the combined effect between the above two features, surface wetting performance can be smartly regulated among multiple states. Moreover, due to the excellent controllability of the surface, the application in directional droplet transportation was also demonstrated. This paper offers a new surface with tunability in both surface chemistry and micromorphology, and given the excellent wetting controllability, the surface is believed to be applied in a lot of fields, such as droplet manipulation, fluidic devices and selective catalysis.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Innocent O. Arukalam,Meijiang Meng,Haigang Xiao,Yuantai Ma,Emeka E. Oguzie,Ying Li
Poly(dimethylsiloxane)-ZnO coatings modified with different amounts of perfluorodecyltrichlorosilane (FDTS) were prepared using sol-gel technique. The results of field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) examinations showed that the surface structures and roughness of the coatings were respectively influenced by the increasing addition of FDTS. The water contact angle measurements showed maximum value of 130.52° with the 0.10 g FDTS-modified coating sample. The X-ray photoelectron spectroscopy (XPS) results indicated the coatings’ hydrophobicity was also influenced by surface chemistry. The FTIR-ATR characterization results showed there was remarkable increase in the crystallinity of 0.10 g FDTS-modified coating after modification, and was confirmed by differential scanning calorimetry (DSC) analysis of crystallization temperature and the X-ray diffraction (XRD) results with an estimation of 71.29% percent crystallinity. The mechanical properties of the coatings were also conducted. The EIS measurements for anti-corrosion behavior showed that 0.10 g FDTS-modified coating had the highest barrier performance and lowest rate of degradation. Indeed, the obtained data have demonstrated that 0.10 g (≈ 0.18%) FDTS produced the most significantly effect on the surface and barrier properties of the coatings and thus, can effectively be used for anti-corrosion application in the marine environments.
研究领域:
材料科学
·
化学工程
✓ 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）