External-Electric-Field-Enhanced Uniformity and Deposition Rate of a TiO2 Film Prepared by the Sparking Process

Thongpan, Winai; Kumpika, Tewasin; Kantarak, Ekkapong; Panthawan, Arisara; Pooseekheaw, Porntipa; Singjai, Pisith; Tuantranont, Adisorn; Thongsuwan, Wiradej

doi:10.15407/ujpe63.6.531

Cited by 12 publications

(3 citation statements)

References 37 publications

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“…Traiwatcharanon et al [38] reported that the size of the synthesized particle was ∼23 nm for a sparking time of 45 min. In this work, the average size of nanoparticles increases significantly to ∼40 nm for a sparking time of 3 h. The effect can be explained by equation (2) [39].…”

Section: Electrochemical Measurementsmentioning

confidence: 58%

Sparked ZnO nanoparticles-based electrochemical sensor for onsite determination of glyphosate residues

et al. 2023

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Glyphosate (N-(phosphonomethyl)glycine) is well known nonselective and broad-spectrum herbicide that has been extensively used in agricultural areas around the world to increase agricultural productivity. However, the utilization of glyphosate can cause environmental contamination and health problems. Therefore, the detection of glyphosate with a fast, low-cost, and portable sensor is still important. In this work, the electrochemical sensor has been developed by modifying of working surface on the screen-printed silver electrode (SPAgE) with a mixtures solution between zinc oxide nanoparticles (ZnO-NPs) and poly (diallyldimethylammonium chloride) (PDDA) by the drop-casting process. The ZnO-NPs have been prepared based on a sparking method by using pure zinc wires. The ZnO-NPs/PDDA/SPAgE sensor shows a wide range of glyphosate detection (0 µM - 5 mM). The limit of detection of ZnO-NPs/PDDA/SPAgE is 2.84 µM. The ZnO-NPs/PDDA/SPAgE sensor exhibits high selective towards glyphosate with minimal interference from other commonly used herbicides including paraquat, butachlor-propanil and glufosinate-ammonium. Furthermore, the ZnO-NPs/PDDA/SPAgE sensor demonstrates a good estimation of glyphosate concentration in real samples such as green tea, corn juice and mango juice.

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Section: Electrochemical Measurementsmentioning

confidence: 58%

Sparked ZnO nanoparticles-based electrochemical sensor for onsite determination of glyphosate residues

et al. 2023

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“…The authors declare no conflict of interest. Magnetic forces can induce crystallization and is a valuable strategy for chemical free reactions, together with electric field [41], pressure [42], ultrasound [43] and sonication treatment [44].…”

Section: Conflicts Of Interestmentioning

confidence: 99%

Inducing Crystallinity of Metal Thin Films with Weak Magnetic Fields without Thermal Annealing

et al. 2018

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Since the discovery of thin films, it has been known that higher crystallinity demands higher temperatures, making the process inadequate for energy-efficient and environmentally friendly methods of thin film fabrication. We resolved this problem by sparking metal wires in a 0.4 Tesla magnetic field at ambient conditions under ultra-pure nitrogen flow to replace the annealing of thin films, and thus designed an environmentally friendly and energy-efficient thin film fabrication method. We employed grazing incidence X-Ray Diffraction spectroscopy to characterize crystallinity of Iron, Nickel, Copper and Tungsten thin films prepared by a sparking discharge process in the presence of 0.4 T magnetic field at an ambient temperature of 25 °C. Control experiment was conducted by sparking without a magnetic field present and using ultra-pure nitrogen flow and ambient air containing oxygen. The Iron thin film prepared in ultra-pure nitrogen flow preserved crystallinity even after one year of ageing. Nickel exhibited higher crystallinity when sparked in nitrogen gas flow than when sparked in atmospheric air and was the only element to crystalize under atmospheric air. Tungsten successfully crystalized after just 40 min of sparking and aluminium failed to crystalize at all, even after 12 h of sparking under nitrogen flow.

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“…That is challenging to control the direction of nanoparticles to improve deposition rate, uniformity, and morphology of prepared films. In previous paper, an external electric field was applied to confine nanoparticles on the substrate for increase deposition rate and uniformity of the films 15 . However, this technique is only suitable for conductive substrates (insulating substrates are not recommended).…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on improvement of photocatalytic performance of V2O5/TiO2 nanoheterostructure films prepared by sparking method

Pooseekheaw

Thongpan

Kantarak

et al. 2022

Sci Rep

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Our porous V2O5/TiO2 nanoheterostructure films (with a Ti/V atomic ratio of 1:1) were fabricated via a single-step sparking method using a strong magnetic field (0.5 T) without annealing requirement for the first time. We found that the magnetic flux arrangement has effect on film crystallization, unique morphology, large specific surface area, and surprisingly controllable phase structure of the films. An amorphous TV film was transformed to the TiO2 (anatase/rutile) phase (for TVN) and V2O5–VO2 mixed-phase (for TVH) without destroying the mesopores from an annealing process. Moreover, the TVH sample able to improve the degradation rate up to 270% compared with pre-annealed TV films and up to 30% with post-annealed (400 °C) TVA films. In this paper, the influence of magnetic flux arrangement on structural, morphological, optical, and photocatalytic properties of prepared sample have been investigated and reported.

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External-Electric-Field-Enhanced Uniformity and Deposition Rate of a TiO2 Film Prepared by the Sparking Process

Cited by 12 publications

References 37 publications

Sparked ZnO nanoparticles-based electrochemical sensor for onsite determination of glyphosate residues

Sparked ZnO nanoparticles-based electrochemical sensor for onsite determination of glyphosate residues

Inducing Crystallinity of Metal Thin Films with Weak Magnetic Fields without Thermal Annealing

Effect of magnetic field on improvement of photocatalytic performance of V2O5/TiO2 nanoheterostructure films prepared by sparking method

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