Nanorose-like ZnCo2O4 coatings synthesized via sol–gel route: Morphology, grain growth and DFT simulations

E. Awaltanova; A. Amri; N. Mondinos; M. Altarawneh; T.S.Y. Moh; H. Widjaja; L.S. Chuah; H.L. Lee; C. Yang-Yin; M.M. Rahman; I. Amri; I. Iwantono; Z-T Jiang

doi:10.1007/s10971-019-04987-4

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Nanorose-like ZnCo2O4 coatings synthesized via sol–gel route: Morphology, grain growth and DFT simulations

Journal article

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Nanorose-like ZnCo2O4 coatings synthesized via sol–gel route: Morphology, grain growth and DFT simulations

E. Awaltanova, A. Amri, N. Mondinos, M. Altarawneh, T.S.Y. Moh, H. Widjaja, L.S. Chuah, H.L. Lee, C. Yang-Yin, M.M. Rahman, …

Journal of Sol-Gel Science and Technology, Vol.90(3), pp.450-464

2019

DOI: https://doi.org/10.1007/s10971-019-04987-4

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Abstract

Ternary cobalt-based metal oxide (ZnCo2O4) has been successfully coated onto aluminum substrate via sol–gel method. The coatings were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and UV–Vis–NIR spectrophotometry. Thermal degradation of the coatings was probed by thermogravimetric analysis (TGA) and differential thermal analysis (DTA). Model of crystal growth kinetics and density functional theory (DFT) calculations further probed the crystalline structure evolution. The predicted ZnCo2O4 crystalline structures were confirmed by XRD and EDX. The grain growth kinetic model for ZnCo2O4, derived from Lifshitz–Slyozov–Wagner (LSW) theory, determined that the growth of crystalline phases is unaffected by the annealing temperature; however, the crystallites’ sizes decreased with the increase in precursor concentration. DFT analysis indicated that structural energy stability between the bulk state and slabs of ZnCo2O4 was at two oxygen layers (O-layers) with an optimum grain width of 17.21 Å. Interestingly, the morphology of ZnCo2O4 represented a rose-like template structure formed by inter-connecting layers of nanosheets. This unique surface morphology enhanced the optical absorptance properties up to α = 70.7%.

Details

Title: Nanorose-like ZnCo2O4 coatings synthesized via sol–gel route: Morphology, grain growth and DFT simulations
Authors/Creators: E. Awaltanova (Author/Creator) - Riau University
A. Amri (Author/Creator) - Riau University
N. Mondinos (Author/Creator) - Murdoch University
M. Altarawneh (Author/Creator) - Murdoch University
T.S.Y. Moh (Author/Creator) - University College of Technology
H. Widjaja (Author/Creator) - Murdoch University
L.S. Chuah (Author/Creator) - Universiti Sains Malaysia
H.L. Lee (Author/Creator) - Universiti Sains Malaysia
C. Yang-Yin (Author/Creator) - Newcastle University Singapore
M.M. Rahman (Author/Creator) - Jahangirnagar University
I. Amri (Author/Creator) - Riau University
I. Iwantono (Author/Creator) - Riau University
Z-T Jiang (Author/Creator) - Murdoch University
Publication Details: Journal of Sol-Gel Science and Technology, Vol.90(3), pp.450-464
Publisher: Springer US
Identifiers: 991005544495807891
Copyright: © Springer Science+Business Media, LLC, part of Springer Nature 2019
Murdoch Affiliation: School of Engineering and Information Technology
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 7 Engineering & Materials Science; 7.70 Thermodynamics; 7.70.1160 Solar Thermal Systems
Web Of Science research areas: Materials Science, Ceramics
ESI research areas: Materials Science