Effect of Zinc Nitrate Concentration on the Morphology of ZnO Nanostructures Grown by Hydrothermal Method

Al-Rasheedi, Asmaa; Alonizan, N.; Aida, M.S.

doi:10.1002/pssa.202200905

Cited by 5 publications

(4 citation statements)

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“…In addition, the studies by Junaid (2022), 35 Vignesh et al (2022), 36 Al-Shehri et al (2023), 37 and Madhuri (2023) 38 collectively provide insights into the synthesis, characterization, and potential applications of zinc oxide (ZnO) nanoparticles.…”

Section: Synthesis Methods Of Zinc Oxide Nanoparticlesmentioning

confidence: 99%

“…While Junaid (2022) 35 and Vignesh et al (2022) 36 primarily emphasize the synthesis and characterization of ZnO nanoparticles, Al-Shehri et al (2023) 37 investigated the potential applications of Al-doped ZnO nanoparticles, particularly in optoelectronic devices. Al-Shehri et al (2023) successfully synthesized zinc oxide (ZnO) nanocrystalline powders with varying aluminum (Al) concentrations (ranging from 0 to 4 wt%) using the sol–gel technique.…”

Section: Synthesis Methods Of Zinc Oxide Nanoparticlesmentioning

confidence: 99%

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Cutting-edge developments in zinc oxide nanoparticles: synthesis and applications for enhanced antimicrobial and UV protection in healthcare solutions

Irede,

Awoyemi,

Owolabi

et al. 2024

RSC Adv.

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Section: Synthesis Methods Of Zinc Oxide Nanoparticlesmentioning

confidence: 99%

Section: Synthesis Methods Of Zinc Oxide Nanoparticlesmentioning

confidence: 99%

Cutting-edge developments in zinc oxide nanoparticles: synthesis and applications for enhanced antimicrobial and UV protection in healthcare solutions

Irede,

Awoyemi,

Owolabi

et al. 2024

RSC Adv.

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“…The ZnO nanorods were prepared using a two-steps procedure involving seed layer deposition and nanostructure growth, the same procedure was adopted in our previous work for the production of nanostructured ZnO [37] . In the first step, the glass substrate was coated with a thin ZnO film that served as the seed layer.…”

Section: Methodsmentioning

confidence: 99%

Growth of self-aligned ZnO nanorods by hydrothermal process

Al-Rasheedi,

Khammar,

Abdel-Daiem

et al. 2023

Phys. Scr.

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The present paper discuss the growth mechanisms of ZnO nanorods thin-films using the hydrothermal process. This was achieved on a ZnO seed layer prepared by sputtering and spray pyrolysis. ZnO nanorods were prepared using various precursors, including zinc nitrate [Zn(NO3)2.6H2O], zinc chloride [ZnCl2], and zinc acetate [Zn(CH3COO)2.2H2O, to investigate the effect of salt source. The morphological and structural properties of ZnO NRs were investigated using x-ray diffraction (XRD) and a scanning electron microscopy (SEM). The deposited film consist of highly oriented crystalline ZnO NRs along the [002] axis. We found that the seed layer preparation method alters the nanorods alignment. SEM observation revealed that, regardless of the seed layer preparation method, the nature of salt source play a key role in the nanorods size. We concluded that the ZnO nanorods diameter increases in the following order with respect to zinc salt source: ZnAc <zinc nitride <zinc chloride. The mechanism of of ZnO nanorods formation is correlated with bath solution viscosity and surface tension properties. We emphasized that, in a solution with a larger viscosity and surface tension, such as zinc chloride, the motion and transfer towards the substrate, of species participating in ZnO formation, is hindered by the friction force due to the viscosity. When using a solution with lower viscosity and surface tension, such as zinc acetate, the species forming the ZnO nanorods can easily reach the substrate, which leads to a larger nucleation center, yielding low-diameter ZnO nanorods.

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“…At an ambient temperature, ZnO displays an excitonic energy of approximately 60 meV in addition to its high optical band gap of 3.37 eV . Excitons are bound states of an electron and a hole that forms when an electron is excited into the conduction band from its valence band . Thus, ZnO is an adaptable nanomaterial with numerous uses in sunscreens, cosmetics, antibacterial coating, chemical gas sensors, biosensors, thin-film transistors (TFTs), photovoltaic devices, supercapacitors, photocatalysis, and electrocatalysis. , Several synthesis methods have been employed to produce zinc oxide (ZnO), including sol–gel, hydrothermal, solvothermal, chemical precipitation, chemical vapor transport, spray pyrolysis, and electrochemical method …”

Section: Introductionmentioning

confidence: 99%

Band Energy Modulation in an Fe–Mn–ZnO Nanowire–Nanosheet Catalyst for Efficient Overall Water Splitting

Mishra,

Choi,

Ryu

et al. 2024

Energy Fuels

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Here, we studied a simple, scalable, and in situ hydrothermal method to prepare an Fe−Mn-doped ZnO nanowire−nanosheet on a three-dimensional (3D) Ni-foam substrate for electrocatalytic overall water splitting. Attractively, the doping of Fe and Mn in ZnO plays a significant role in mobilizing the electron from Fe and Mn toward ZnO in the Fe−Mn-doped ZnO nanowire−nanosheet due to different vacuum levels of Fe, Mn, and ZnO, facilitating the development of more active sites on the surface of the catalyst, which plays a crucial role in improving the catalytic performances during overall water splitting. Consequently, the Fe−Mn-doped ZnO nanowire−nanosheet shows a lowermost overpotential of 230 mV and a lowermost Tafel slope of 115.2 mV dec −1 during the hydrogen evolution reaction (HER) and 248 mV overpotential and a short Tafel slope of 109.1 mV dec −1 during the oxygen evolution reaction (OER) in a 1.0 M KOH electrolyte. Besides, the Fe−Mn-doped ZnO nanowire−nanosheet depicts low charge transfer and series resistances of 3.7 and 0.41 Ω during the HER and 0.36 and 1.66 Ω during the OER, respectively. Also, it elucidates outstanding durability at −10 mA cm −2 for 12 h (HER) and 10 mA cm −2 for 12 h (OER) using chronopotentiometry and 1000 cycles. In addition, the Fe−Mn−ZnO||Fe− Mn−ZnO nanowire−nanosheet cell shows a lower potential of 1.74 V and outstanding stability over 24 h to deliver 10 mA cm −2 in electrocatalytic overall water splitting. Besides, the staircase stability of the Fe−Mn−ZnO||Fe−Mn−ZnO nanowire−nanosheet cell also suggests outstanding stability over 8.2 h at different current densities. Captivatingly, the concept of energy band modulation in the bimetallic doped Fe−Mn−ZnO nanowire−nanosheet catalyst is envisaged to explore insights into the mechanisms of the evolution of hydrogen and oxygen.

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Effect of Zinc Nitrate Concentration on the Morphology of ZnO Nanostructures Grown by Hydrothermal Method

Abstract: The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/pssa.202200905.

Cited by 5 publications

References 43 publications

Cutting-edge developments in zinc oxide nanoparticles: synthesis and applications for enhanced antimicrobial and UV protection in healthcare solutions

Cutting-edge developments in zinc oxide nanoparticles: synthesis and applications for enhanced antimicrobial and UV protection in healthcare solutions

Growth of self-aligned ZnO nanorods by hydrothermal process

Band Energy Modulation in an Fe–Mn–ZnO Nanowire–Nanosheet Catalyst for Efficient Overall Water Splitting

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