Low-temperature hydrothermal synthesis of ZnO nanorods: Effects of zinc salt concentration, various solvents and alkaline mineralizers

Edalati, Khatereh; Shakiba, Atefeh; Vahdati-Khaki, Jalil; Zebarjad, Seyed Mojtaba

doi:10.1016/j.materresbull.2015.11.001

Cited by 70 publications

(24 citation statements)

References 27 publications

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“…The production of ZnO nanostructures (e.g., nanorods, nanobelts, and nanorings), by hydrothermal process on different substrates has been widely investigated [5,43,[45][46][47][48][49]. In particular, several studies reported the effects of the experimental conditions (e.g., species concentration, pH, and temperature) on the features of the nano-objects (e.g., shape, pattern, and homogeneity) [50][51][52][53][54].…”

Section: Resultsmentioning

confidence: 99%

Improving Wood Resistance to Decay by Nanostructured ZnO-Based Treatments

Weththimuni

Capsoni

Malagodi

et al. 2019

Journal of Nanomaterials

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In this study, the maple wood surface was coated with nanostructured zinc oxide, grown on the surface by using a hydrothermal process, and furtherly treated with shellac varnish. Samples obtained both after ZnO treatment and after the final varnish application were characterized by different techniques, i.e., X-ray diffraction (XRD), scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDS), micro-FTIR with attenuated total reflectance (μ-ATR-FTIR), chromatic variation measurements, and contact angle determinations. Analytical results showed that the wood surface was covered by quite a homogeneous array of inorganic nanoparticles and that the natural resin forms a regular film over the ZnO nanostructures. An accelerated aging test was used to evaluate the protecting effectiveness of the treatments towards UV-induced decay of wood material. After the test, wood treated with ZnO and with the shellac/ZnO combination underwent a considerably lower chromatic change if compared to the untreated wood, suggesting an enhanced resistance of the treated maple to the decay due to light exposition. The presence of nanostructured ZnO protects from decay not only the wood substrate but also the shellac film. A microbiology test showed that growth of fungal species, e.g., common mold, is prevented on the wood surface treated with ZnO or with shellac/ZnO, indicating that the nanostructured zinc oxide also provides an effective protection from biodeterioration. The coating obtained by consecutive application of nanosized ZnO particles and shellac varnish combines the excellent aesthetical features and water repellence of the traditional finish with the protecting effectiveness of the nanostructured inorganic component.

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Section: Resultsmentioning

confidence: 99%

Improving Wood Resistance to Decay by Nanostructured ZnO-Based Treatments

Weththimuni

Capsoni

Malagodi

et al. 2019

Journal of Nanomaterials

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“…Chemical syntheses have some advantages, since they do not need sophisticated equipment with high vacuum level, and therefore they are less expensive. Microstructure of chemically synthesized nanostructures can be precisely controlled by changing the starting materials, temperature, additives, and their concentrations [12][13][14][15][16]. A significant problem of chemical synthesis is the appearance of pollutants and toxic materials that are created as a by-product of the reaction, which hinder the material´s practical and technological applications.…”

Section: Introductionmentioning

confidence: 99%

Studies on the Growth Control of ZnO Nanostructures synthesized by the Chemical Method

2018

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ZnO nanostructures were synthesized through a chemical method using different Zn precursors and hexamethylenetetramine (HMTA) at 90 °C. The effects of the reactants on the morphological evolution of ZnO nanorods were investigated. The samples were characterized by using XRD, SEM, EDX and BET. The hexagonal wurtzite phase of ZnO was confirmed by X-ray diffraction (XRD). The performed analysis indicated that different morphologies were obtained by changing the reactants.Se sintetizaron nanoestructuras de ZnO por método químico usando diferentes precursores de Zn y hexametilentetraamina (HMTA) a 90 °C y se investigaron los efectos de los reactivos sobre la evolución morfológica de las nanovarillas de ZnO. Las muestras se caracterizaron mediante DRX, SEM, EDX y BET. Se confirmó la fase hexagonal wurtzita para todas las muestras por difracción de rayos x (DRX). Los análisis realizados indican que cambiando los reactivos se obtienen diferentes morfologías. Palabras clave:ZnO; crecimiento de cristales; nanoestructuras; síntesis química.

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“…Accordingly, ZnO material is expected to be more promising than the current mainstream GaN-based device for short-wavelength optoelectronic applications [1][2][3][4]. Additionally, the growth in technology and temperature necessary to realize a ZnO film with quality c-axis crystallization is much simpler, such as when done by sputtering, pulse laser deposition, and hydrothermal methods, rather than for the epitaxial GaN layer, resulting in potentially low-cost fabrications and processes for ZnO-based devices [5][6][7][8]. Among these deposition methods, sputtering technology is a commercially used method for preparing large-area and cost-efficient polycrystalline ZnO layers on various substrates in applications for optoelectronic devices at a relatively low temperature.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Deposition of an AlN-ZnO/ZnO/AlN-ZnO Double Heterojunction Structure Using Radio Frequency Magnetron Cosputtering Technology

et al. 2019

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A symmetric AlN-ZnO/ZnO/AlN-ZnO double heterojunction structure was consecutively deposited onto silicon substrate using cosputtering technology and then annealed at 700 °C under vacuum ambient for 30 min. The crystalline quality of the ZnO film in the heterojunction structure was significantly improved as verified by X-ray diffraction (XRD) and photoluminescence (PL) measurements. Improvement on the crystalline structure was ascribed to the stress in the ZnO active film, which was effectively buffered by the underlayered AlN-ZnO layer. Native oxygen vacancies in the ZnO film also were effectively suppressed due to a little diffusion of the Al atoms from the cosputtered AlN-ZnO layer, and led to an increase in the carrier concentration. Such ZnO film deposited onto the homogeneous AlN-ZnO buffer layer emitted an intense near-band-edge emission, and the deep level emission was absent. The ultraviolet emission was further enhanced by covering an AlN-ZnO barrier laye, which was a consequence of the improvement on the carrier confinement. Accordingly, single ultraviolet emission with a quality ZnO crystalline structure, which is very promising for application in short-wavelength optoelectronic devices, was realized from the ZnO film sandwiched by the homogeneity of the cosputtered AlN-ZnO layers.

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Low-temperature hydrothermal synthesis of ZnO nanorods: Effects of zinc salt concentration, various solvents and alkaline mineralizers

Cited by 70 publications

References 27 publications

Improving Wood Resistance to Decay by Nanostructured ZnO-Based Treatments

Improving Wood Resistance to Decay by Nanostructured ZnO-Based Treatments

Studies on the Growth Control of ZnO Nanostructures synthesized by the Chemical Method

Investigation on the Deposition of an AlN-ZnO/ZnO/AlN-ZnO Double Heterojunction Structure Using Radio Frequency Magnetron Cosputtering Technology

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