Gas sensor applications of zinc oxide thin film grown by the polymeric precursor method

Biasotto, Glenda; Ranieri, Maria; Foschini, C. R.; Simões, Alexandre Zirpoli; Longo, Elson; Zaghete, M. A.

doi:10.1016/j.ceramint.2014.06.099

Cited by 36 publications

(18 citation statements)

References 26 publications

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“…Besides the use as semiconductor, Zinc oxide (ZnO) deserves to be highlighted in other fields such as photocatalysis [1], solar cells [2], gas sensors [3], optical sensors [4], etc. The most abundant structure of ZnO is the hexagonal wurtzite, presenting a band gap value of 3.37 eV (368 nm) and excitation of 60 meV [5].…”

Section: Introductionmentioning

confidence: 99%

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

Byzynski

Pereira

Volanti

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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The use of extensive, time-consuming synthesis and the cost of an additional element in synthesis makes difficult the synthesis of photocatalyst active under a broad wavelength range. We propose a synthesis method to obtain ZnO nanoparticles in distinctive morphologies, which lie to several photocatalytic activation conditions. The Zn precursor concentration, solvent, temperature and reaction time altered the ZnO particles morphologies. Although all synthesis parameters modification interferes in ZnO particle morphology, the most pronounced was Zn salt precursor concentration. The synthesis parameter did not interfere in the crystalline wurtzite ZnO phase and the optical characterization, indicating possibilities of ionic defects formations in ZnO lattice. The "3-D flower like" ZnO structure reaches 98% of discoloration under UV illumination and 42% under visible illumination of initial rhodamine-B concentration. The good UV and visible photocatalytic active confirms that with only the modification of synthesis method without any dopant element, ZnO structure is active in large wavelength range.

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Section: Introductionmentioning

confidence: 99%

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

Byzynski

Pereira

Volanti

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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“…To obtain crack-free films, process parameters, including solution viscosity and ionic concentration, substrate-film adhesion, heating conditions, preparation atmosphere, substrate, and withdrawal speed need optimization. Differences between the thermal expansion coefficients of the film and the substrate also influence PPM [21,22]. In this work, a single-phase film is prepared by the soft chemical method and its structural, dielectric, magnetic and multiferroic properties are investigated.…”

Section: Introductionmentioning

confidence: 99%

La0.5Sm0.5FeO3: a new candidate for magneto-electric coupling at room temperature

Ranieri

Cilense

Aguiar

et al. 2017

J Mater Sci: Mater Electron

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“…Therefore, the measurement and continuous monitoring of O 3 levels are of critical importance [14]. Notably, gas sensors require a porous microstructure with a small particle size, to yield a large specific surface area [15]. The sensitivity and response time of ZnO-based sensors strongly depend on the porosity of the material, which is related to certain synthesis parameters, e.g., the temperature.…”

Section: Introductionmentioning

confidence: 99%

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

Rocha

Foschini

Silva

et al. 2016

Ceramics International

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Good quality ZnO nanostructures were obtained by the microwave-assisted hydrothermal synthesis, at low reaction temperatures, using zinc acetate as the starting precursor. X-ray diffraction confirmed the crystallinity of the ZnO nanostructures, which resulted free of impurities. Field emission gun scanning electron microscopy analysis revealed that the ZnO nanostructures crystallized at 120 1C were more homogeneous and had a constant diameter along the entire wire length, exhibiting an ideal defect density that favors the gas sensing response. A new ozone gas sensor based on these nanostructures was evaluated at low exposure times (15 s) by recording the change in the film resistance. The ZnO nanostructures showed good sensitivity even at low ozone concentration (100 ppb), and fast response and short recovery time at 200 1C, demonstrating great potential for a variety of applications. Two main effects were observed: the first one is intrinsic to that of the sample, while the second is a consequence of the surface and interface complex cluster defects, which produce extrinsic defects.

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Gas sensor applications of zinc oxide thin film grown by the polymeric precursor method

Cited by 36 publications

References 26 publications

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

La0.5Sm0.5FeO3: a new candidate for magneto-electric coupling at room temperature

Novel ozone gas sensor based on ZnO nanostructures grown by the microwave-assisted hydrothermal route

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