In-situ study of mass and current density for electrophoretic deposition of zinc oxide nanoparticles

Hasanpoor, Meisam; Mahmood, Asif; Delavari, Hamid

doi:10.1016/j.ceramint.2016.01.076

Cited by 25 publications

(13 citation statements)

References 33 publications

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“…By comparing Figures and , it seems that the gradients varied across all diagrams and concentrations concurrently. Presumably, this phenomenon resulted from the reduction in the current loss and consequently from the decrease either in the nanoparticles’ velocity during the deposition or the slope of wet density …”

Section: Resultsmentioning

confidence: 99%

“…Presumably, this phenomenon resulted from the reduction in the current loss and consequently from the decrease either in the nanoparticles' velocity during the deposition or the slope of wet density. 34 Figures 8 and 9 are the SEM images from the deposit's surface. As Figure 8 shows, with increasing voltage in the methanol suspension, the content of the cracks increased.…”

Section: Kinetics Of Nanoparticles Depositionmentioning

confidence: 99%

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Electrophoretic deposition of ZnO–CeO₂ mixed oxide nanoparticles

2016

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ZnO–CeO2 nanoparticles were synthesized by microwave combustion and deposited by electrophoretic deposition (EPD). The effect of using two different alcohols, ethanol and methanol, was investigated on EPD behavior and morphology of deposited film. Moreover, the effect of concentration of nanoparticles and applied voltage on the mass of deposit and the variation in the current density were investigated. With a change in the alcohol type, the surface morphology of deposition changed and some voids were observed on the deposition surface in ethanol. In all cases, with increasing concentration of nanoparticles in suspension, the number of developed cracks increased. Besides, a rise in voltage led to an increase in the number of cracks. The EPD processes in ethanol and methanol suspension were simulated over time using different zero boundary conditions. Hemi‐spherical morphology was seen for the nanoparticles deposited in ethanol. This kind of growth was simulated based on the changes in electrical field.

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Section: Resultsmentioning

confidence: 99%

Section: Kinetics Of Nanoparticles Depositionmentioning

confidence: 99%

Electrophoretic deposition of ZnO–CeO₂ mixed oxide nanoparticles

2016

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“…The polyester powder (commercially type) was purchased from Nikfam-Gostar (Iran) Company. The synthesis process of ZnO nanoparticles with the size of 10-20 nm was done using microwave method as mentioned in Hasanpoor et al (2016). The scanning electron microscopy (SEM) micrograph of primary pure polyester powder and the transmission electron microscopy (TEM) micrograph of ZnO nanoparticles are demonstrated in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Corrosion behavior of ZnO-polyester nanocomposite powder coating

Golgoon

Mahmood

Toorani

et al. 2017

ACMM

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Purpose The low resistance against penetration of water, oxygen and the other corrosive ions through the paths of coating is one the most important problems. So, protective properties of coating such as polyester must be promoted. Recently, the use of nanoparticles in the matrix of polymer coating to increase their protection and mechanical properties has been prospering greatly. The purpose of this study is to improve the corrosion resistance of the polyester powder coating with ZnO nanoparticles. The ZnO nanoparticles have been synthesized by hydrothermal method in a microwave. Using polyester – ZnO nanocomposite coating as powder – combining them by ball milling process and coating them by electrostatic process are innovative ideas and have not been used before it. Design/methodology/approach Polyester powder as the matrix and ZnO nanoparticles as reinforcing were combined in three different weight percentage (0.5, 1, 2 Wt.%), and they formed polymer nanocomposite by ball milling process. Then, the fabricated nanocomposite powder was applied to the surface of carbon steel using an electrostatic device, and then the coatings were cured in the furnace. The morphology of synthesized zinc oxide nanoparticles was investigated by transmission electron microscope. Also, the morphology of polyester powder and fabricated coatings was studied by scanning electron microscope. The effects of zinc oxide nanoparticles on the corrosion resistance of coated samples were studied by electrochemical impedance spectroscopy (EIS) test at various times (1-90 days) of immersion in 3.5 per cent NaCl electrolyte. Findings Scanning electron microscopy (SEM) results reveal that there are no obvious crack and defects in the nanocomposite coatings. In contrast, the pure polyester coatings having many cracks and pores in their structure. According to the EIS results, the corrosion resistance of nanocomposite coating compared to pure coating is higher. The value obtained from EIS test show that corrosion resistance for coating that contains 1 Wt.% nanoparticle was 32,150,000 (Ωcm2), which was six times bigger than that of pure coating. In addition to providing a barrier against diffusion of electrolyte, ZnO nanoparticles act as a corrosion inhibitor and, thus, increases the corrosion resistance. The corrosion resistance of coating containing 0.5 Wt.% nanoparticles was lower as compared to that of 1 Wt.% nanoparticles. The low content of nanoparticles caused partial covering of the porosity of coating which in turn leads to provide weaker barrier properties. The increase in quantity of nanoparticles from 1 to 2 Wt.% also caused a decrease in corrosion resistance which is attributed to the agglomeration of nanoparticles. Originality/value The results of this study indicated the significant effect of ZnO nanoparticles on the protective performance and corrosion resistance of the polyester powder coating. Evaluation of coating surface and interface with SEM technique revealed that nanocomposite coating compared with pure polyester coating provided a coating with lower number of pores and with higher quality. The EIS measurements represented that polymeric coating that contains nanoparticles compared to pure coating provides a better corrosion resistance. In addition to providing a barrier against diffusion of electrolyte, ZnO nanoparticles act as a corrosion inhibitor and thus increase the corrosion resistance. The corrosion resistance of coating containing 0.5 Wt.% nanoparticles was lower as compared to that containing 1Wt.% nanoparticles. The low content of nanoparticles caused partial covering of the porosity of coating which in turn leads to provide weaker barrier properties. The increase in quantity of nanoparticles from 1 to 2 Wt.% also caused a decrease in corrosion resistance which is attributed to the agglomeration of nanoparticles.

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“…Over few past decades, ZnO NRs have attracted a lot of attention among researchers for energy-harvester materials, owing to its excellent physical properties [83]. Properties, such as piezoelectric features, high thermal conductivity, high catalytic capabilities, UV filtering capability, semiconductor and antifungal and antibacterial effects have marked ZnO as a well-established material in the electronic, cosmetic and medical fields alike [84].…”

Section: Synthesis Techniques Of Growth Process Znomentioning

confidence: 99%

Towards a Highly Efficient ZnO Based Nanogenerator

et al. 2022

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A nanogenerator (NG) is an energy harvester device that converts mechanical energy into electrical energy on a small scale by relying on physical changes. Piezoelectric semiconductor materials play a key role in producing high output power in piezoelectric nanogenerator. Low cost, reliability, deformation, and electrical and thermal properties are the main criteria for an excellent device. Typically, there are several main types of piezoelectric materials, zinc oxide (ZnO) nanorods, barium titanate (BaTiO3) and lead zirconate titanate (PZT). Among those candidate, ZnO nanorods have shown high performance features due to their unique characteristics, such as having a wide-bandgap semiconductor energy of 3.3 eV and the ability to produce more ordered and uniform structures. In addition, ZnO nanorods have generated considerable output power, mainly due to their elastic nanostructure, mechanical stability and appropriate bandgap. Apart from that, doping the ZnO nanorods and adding doping impurities into the bulk ZnO nanorods are shown to have an influence on device performance. Based on findings, Ni-doped ZnO nanorods are found to have higher output power and surface area compared to other doped. This paper discusses several techniques for the synthesis growth of ZnO nanorods. Findings show that the hydrothermal method is the most commonly used technique due to its low cost and straightforward process. This paper reveals that the growth of ZnO nanorods using the hydrothermal method has achieved a high power density of 9 µWcm−2.

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In-situ study of mass and current density for electrophoretic deposition of zinc oxide nanoparticles

Cited by 25 publications

References 33 publications

Electrophoretic deposition of ZnO–CeO₂ mixed oxide nanoparticles

Electrophoretic deposition of ZnO–CeO₂ mixed oxide nanoparticles

Corrosion behavior of ZnO-polyester nanocomposite powder coating

Towards a Highly Efficient ZnO Based Nanogenerator

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In-situ study of mass and current density for electrophoretic deposition of zinc oxide nanoparticles

Cited by 25 publications

References 33 publications

Electrophoretic deposition of ZnO–CeO2 mixed oxide nanoparticles

Electrophoretic deposition of ZnO–CeO2 mixed oxide nanoparticles

Corrosion behavior of ZnO-polyester nanocomposite powder coating

Towards a Highly Efficient ZnO Based Nanogenerator

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Product

Resources

About

Electrophoretic deposition of ZnO–CeO₂ mixed oxide nanoparticles

Electrophoretic deposition of ZnO–CeO₂ mixed oxide nanoparticles