Investigation of the growth mechanism of the formation of ZnO nanorods by thermal decomposition of zinc acetate and their field emission properties

Sunaina, .; Sreekanth, M.; Ghosh, Santanu; Mehta, S.K.; Ganguli, Ashok K.; Jha, Menaka

doi:10.1039/c7ce00073a

Cited by 44 publications

(13 citation statements)

References 41 publications

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“…The evolution of rectangular nanorods is originated from the substitution of La and Ba-elements of high ionic radii and different valence positions. Several reasons are observed for the formation of BaSrLaFe 12 O 19 nanorods like the crystal structure, bonding preferences, kind of ions, pressure, temperature, surfactant, and pH as reported by Sunaina et al [7]. In the literature also, Kumar et al [8,9], prepared the PLCT (Pb 0.8-y La y Co 0.2 TiO 3 (y = 0.2-0.8)), and PCLT (Pb 0.8 Co 0.2-z La z TiO 3 (z = 0.05-0.2)) samples via the microwave processed sol-gel method.…”

Section: Hydrothermal Techniquementioning

confidence: 85%

A review on the origin of nanofibers/nanorods structures and applications

Naidu

Kumar

Banerjee

et al. 2021

J Mater Sci: Mater Med

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In this review work, we highlight the origin of morphological structures such as nanofibers/nanorods in case of various materials in nano as well as bulk form. In addition, a discussion on different cations of different ionic radii and other intrinsic factors is provided. The materials (ceramic titanates, ferrites, hexaferrites, oxides, organic/inorganic composites, etc.,) exhibiting the nanofibers/nanorods like morphological structures are tabulated. Furthermore, the significance of nanofibers/nanorods obtained from distinct materials is elucidated in multiple scientific and technological fields. At the end, the device applications of these morphological species are also described in the current technology.

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Section: Hydrothermal Techniquementioning

confidence: 85%

A review on the origin of nanofibers/nanorods structures and applications

Naidu

Kumar

Banerjee

et al. 2021

J Mater Sci: Mater Med

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“…At 200 °C h −1 heating rate, nanorods having length ≈3 µm*1.5 µm and at 300 °C h −1 the rod structure completely collapses and turned to nanoparticles morphology (Figure S1c-d, Supporting Information). [45] The insight into the formation of Co-based nanostructures was also evaluated from TEM studies. The micrographs for the sample S1 indicate the formation of a rod-like structure having an average size length ≈4.4 µm and breadth ≈1.8 µm (Figure 4a).…”

Section: Structural and Morphological Analysismentioning

confidence: 99%

Structurally Engineered Anisotropic Cobalt‐Based Nanostructures for Efficient Chlorine and Oxygen Evolution

Rana

Yadav²,

Sunaina³

et al. 2022

Adv Materials Inter

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Electrochemical Cl2 generation using inexpensive electrocatalysis has drawn tremendous scientific attention to meet the future demand for chlorine. The present work deals with the design of the chemical process to synthesize anisotropically aligned metallic hcp‐cobalt nanoparticles. The as‐obtained hcp‐cobalt rods are utilized for the generation of O2 and Cl2 via an electrochemical process. Controlling the thermodynamic parameters during the thermal decomposition of cobalt oxalate rods leads to the formation of aligned nanoparticles. Detailed microscopic investigation shows that the slow heating rate favors the anisotropic growth of nanoparticles, and the fast‐heating rate leads to the formation of agglomerated nanoparticles. Anisotropically aligned hcp‐Co rods show an overpotential of 240 and 30 mV for O2 and Cl2 evolution, respectively. These findings elaborate that aligned particles (rod‐like structures) show promising electrocatalysts with better efficiency for O2 and Cl2 generation. Further, wastewater treatment is done by using in situ generated chlorine and 99% degradation efficiency is observed for textile effluents (methyl orange).

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“…The preferential orientation along the c-axis increases with increasing temperature; however, too high temperature results in simultaneous crystallization of ZnO, which can prevent the decomposition of the organic species and can lead to the rapid evaporation of the solvent and of the by-products during the high temperature annealing. This can result in the formation of cracks or punctures in the layer, which deteriorates the degree of orientation of the crystallites [25,31,32]. Typically reported annealing temperatures lie in the range of 500-600 • C in ambient atmosphere [8,12,18,33].…”

Section: Introductionmentioning

confidence: 99%

Highly Textured Seed Layers for the Growth of Vertically Oriented ZnO Nanorods

et al. 2019

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One dimensional ZnO nanostructures prepared by favorable and simple solution growth methods are at the forefront of this research. Vertically oriented ZnO nanorods with uniform physical properties require high-quality seed layers with a narrow size distribution of the crystallites, strong c-axis orientation, and low surface roughness and porosity. It has been shown that high quality seed layers can be prepared by the sol–gel process. The sol–gel process involves three essential steps: preparation of the sol, its deposition by dip coating, and thermal treatment comprising preheating and annealing. We put emphasis on the investigation of the heat treatment on the properties of the seed layers and on the vertical alignment of the nanorods. It was demonstrated that for the vertical alignment of the nanorods, the preheating step is crucial and that the temperatures reported in the literature have been too low. With higher preheating temperatures, conditions for the vertical alignment of the nanorods were achieved in both investigated annealing atmospheres in air and in argon.

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Investigation of the growth mechanism of the formation of ZnO nanorods by thermal decomposition of zinc acetate and their field emission properties

Cited by 44 publications

References 41 publications

A review on the origin of nanofibers/nanorods structures and applications

A review on the origin of nanofibers/nanorods structures and applications

Structurally Engineered Anisotropic Cobalt‐Based Nanostructures for Efficient Chlorine and Oxygen Evolution

Highly Textured Seed Layers for the Growth of Vertically Oriented ZnO Nanorods

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