Synthesis and Characterization of Al doped ZnO (AZO) by Sol-gel Method

Munawaroh, H; Wahyuningsih, Sayekti; Ramelan, Ari Handono

doi:10.1088/1757-899x/176/1/012049

Cited by 17 publications

(5 citation statements)

References 11 publications

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“…19,20) From the figure, it can be seen that, for the AZNRs, the [002] peak intensity was remarkably decreased and the full width at half maximum was increased; these results indicate that the crystallinity of the ZNRs is decreased by the Al doping. 21,22)…”

Section: Morphology and Structure Of Aznr Sensitive Layermentioning

confidence: 99%

Influence of water vapor on CO detection using a resonant microcantilever functionalized by Al-doped ZnO nanorods

Aprilia

Hosoda

Nuryadi³

et al. 2019

Jpn. J. Appl. Phys.

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A microcantilever (MC) coated by Al-doped ZnO nanorods (AZNRs) was used for carbon monoxide (CO) detection at ambient temperature. Very high sensitivity (on the order of femtograms) was obtained, which is caused by the intense adsorption of CO molecules on the AZNR surface. After the samples had been prepared and characterized, the effects of the presence of water vapor on the CO detection were investigated. Although no response was obtained for AZNRs without the presence of water vapor (i.e. under a vacuum), high sensitivity was observed in the presence of water vapor (finite humidity). Regarding the above phenomena, we propose a model that is a replacement process of the water vapor molecules by the CO molecules on the AZNR surface and discuss it in detail.

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Section: Morphology and Structure Of Aznr Sensitive Layermentioning

confidence: 99%

Influence of water vapor on CO detection using a resonant microcantilever functionalized by Al-doped ZnO nanorods

Aprilia

Hosoda

Nuryadi³

et al. 2019

Jpn. J. Appl. Phys.

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“…The emergence of the bands with low intensity at ca. 622 and 685 cm −1 in the AZO samples are characteristic of Al-O stretching mode [ 53 , 55 , 56 ]. Together with the peaks mentioned above, a pronounced band between 800 and 3000 cm −1 is observed for both AZO samples, while it is absent for the undoped materials.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Performance of Undoped and Al-Doped ZnO Nanoparticles in the Degradation of Rhodamine B under UV-Visible Light:The Role of Defects and Morphology

Piras

Olla

Reekmans

et al. 2022

IJMS

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Quasi-spherical undoped ZnO and Al-doped ZnO nanoparticles with different aluminum content, ranging from 0.5 to 5 at% of Al with respect to Zn, were synthesized. These nanoparticles were evaluated as photocatalysts in the photodegradation of the Rhodamine B (RhB) dye aqueous solution under UV-visible light irradiation. The undoped ZnO nanopowder annealed at 400 °C resulted in the highest degradation efficiency of ca. 81% after 4 h under green light irradiation (525 nm), in the presence of 5 mg of catalyst. The samples were characterized using ICP-OES, PXRD, TEM, FT-IR, 27Al-MAS NMR, UV-Vis and steady-state PL. The effect of Al-doping on the phase structure, shape and particle size was also investigated. Additional information arose from the annealed nanomaterials under dynamic N2 at different temperatures (400 and 550 °C). The position of aluminum in the ZnO lattice was identified by means of 27Al-MAS NMR. FT-IR gave further information about the type of tetrahedral sites occupied by aluminum. Photoluminescence showed that the insertion of dopant increases the oxygen vacancies reducing the peroxide-like species responsible for photocatalysis. The annealing temperature helps increase the number of red-emitting centers up to 400 °C, while at 550 °C, the photocatalytic performance drops due to the aggregation tendency.

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“…Various methods are developed for ZnO doping, such as chemical vapor deposition (CVP) [28], sol-gel [29], atomic layer deposition [30], pulsed laser deposition (PLD) [31], a wet chemical method [32], etc. Drawbacks of chemical methods are the usage of various chemicals in the synthesis process, toxic by-products, stabilizers, and capping agents, while high-vacuum methods can be complicated to handle and expensive.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Silver, Gold, and Platinum Doped Zinc Oxide Nanoparticles by Pulsed Laser Ablation in Water

et al. 2022

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In this paper, we propose a simple two-step method for the synthesis of Ag, Au, and Pt-doped ZnO nanoparticles. The method is based on the fabrication of targets using the pulsed laser deposition (PLD) technique where thin layers of metals (Ag, Pt, Au) have been deposited on a metal-oxide bulk substrate (ZnO). Such formed structures were used as a target for the production of doped nanoparticles (ZnO: Ag, ZnO: Au, and ZnO: Pt) by laser ablation in water. The influence of Ag, Au, and Pt doping on the optical properties, structure and composition, sizing, and morphology was studied using UV-Visible (UV-Vis) and photoluminescence (PL) spectroscopies, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM), respectively. The band-gap energy decreased to 3.06, 3.08, and 3.15 for silver, gold, and platinum-doped ZnO compared to the pure ZnO (3.2 eV). PL spectra showed a decrease in the recombination rate of the electrons and holes in the case of doped ZnO. SEM, TEM, and AFM images showed spherical-shaped nanoparticles with a relatively smooth surface. The XRD patterns confirm that Ag, Au, and Pt were well incorporated inside the ZnO lattice and maintained a hexagonal wurtzite structure. This work could provide a new way for synthesizing various doped materials.

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Synthesis and Characterization of Al doped ZnO (AZO) by Sol-gel Method

Cited by 17 publications

References 11 publications

Influence of water vapor on CO detection using a resonant microcantilever functionalized by Al-doped ZnO nanorods

Influence of water vapor on CO detection using a resonant microcantilever functionalized by Al-doped ZnO nanorods

Photocatalytic Performance of Undoped and Al-Doped ZnO Nanoparticles in the Degradation of Rhodamine B under UV-Visible Light:The Role of Defects and Morphology

Synthesis of Silver, Gold, and Platinum Doped Zinc Oxide Nanoparticles by Pulsed Laser Ablation in Water

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