The role of hydrothermal pathways in the evolution of the morphology of ZnO crystals

Podlogar, Matejka; Rečnik, Aleksander; Yilmazoglu, Gurkan; Özer, İsmail Özgür; Mazaj, Matjaž; Suvacı, Ender; Bernik, Slavko

doi:10.1016/j.ceramint.2016.06.181

Cited by 31 publications

(5 citation statements)

References 45 publications

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“…For hybrid PU composites, the inclusion of fibers did not change the XRD patterns significantly. PU‐ZnO‐10% and the other samples with higher fibers' contents show a new peak at 28°, which is not related directly to fiber, but with Zn(OH) 2 structure and a possible interaction or phase stabilization with fiber inclusion [51]. These observations support network interaction between ZnO, fiber, and PU matrix, as discussed beforehand.…”

Section: Resultssupporting

confidence: 63%

A novel hybrid polyurethane composites with ZnO particles and sheath palm residues: Synergistic effect

et al. 2020

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Technological advances related to the development of new sustainable materials have driven the search for composites containing green fillers. Polyurethane (PU) composites with natural fibers have stood out; however, these materials have limited mechanical and thermal properties. This study developed hybrid PU composites filled with ZnO and palm sheath residues and evaluated the fiber loading (0, 5, 10, 15, and 20 wt%) on morphological, chemical, thermal, crystalline, and mechanical properties. Microscopic and scanning electron microscopy images showed that ZnO promoted homogeneous and isotropic cell structures. Sheath palm residues were well dispersed throughout the PU matrix and increased the foam's density and further decreased the cell sizes due to limited expansion caused by the fibers that altered nucleation and growth mechanisms. Strong hydrogen bonds formed between the fillers and the PU matrix resulted in a new network that improved thermal resistance. Also, crystallinity enhanced PU chains' organization due to filler incorporation, and these changes on the PU matrix increased impact resistance. The best results were obtained for the hybrid PU composite with 20 wt% of palm fiber. The properties improvements show the reinforcements' character in PU foams with environmentally friendly materials.

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Section: Resultssupporting

confidence: 63%

A novel hybrid polyurethane composites with ZnO particles and sheath palm residues: Synergistic effect

et al. 2020

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“…Based on this condition, the solubility of Zn ions was more saturated to form Zn(OH) 2 precipitate, as ligand substitution (NH) formed coordination [Zn(OH) 2 (NH 3 ) 4 ] and a stable Zn(OH) 4 core. Meanwhile ZnO crystal growth was more directed [37,38] …”

Section: Resultsmentioning

confidence: 99%

Biosynthesis of Zinc Oxide (ZnO) Using the Biomass of Aspergillus niger to Impart Cotton Fabric with Antimicrobial Properties

et al. 2022

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The biosynthesis of ZnO is performed through enzymatic mechanisms for controlling the particle size and morphology with using the sol‐gel method. Furthermore, this method utilizes a stabilizer obtained from the cell biomass of Aspergillus niger mold in order to yield homogeneous and consistent products. The evaluation of functional, morphological, and antibacterial activities was carried out at pH 6.0‐13.0. The analysis FT‐IR showed the interaction of hydroxyl groups, aromatic rings, as well as N−H and O−Zn‐O compounds at a wavenumber of 401–584 cm−1. The XRD and SEM characterizations showed that ZnO structure and crystal phase were hexagonal wurtzite at dimensions of 36.2 ‐ 45.4 nm. The differences in pH also influenced the dimensions, morphology, and antimicrobial activity. ZnO with a pH of 8.0 was characterized by FESEM‐EDAX, based on the analysis of morphological uniformity. This characterization obtained rod and cube structures, with atomic ratios of Zn=61.5 % and O=38.5 %. The UV‐DRS spectrum showed that the optical band gap with a value of Eg=3.00–3.11 eV. The differences in morphology further distinguished antibacterial properties on textile fibers, through the use of the Gram ‐ and + bacteria (Pseudomonas aeruginosa and Staphylococcus aureus), with inhibition zones of 17–21 mm and 21–25 mm, respectively. Therefore, ZnO is classified as a very strong antibacterial material than amoxicillin, with an inhibition zone of 13.6 mm.

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“…As for the PRh/ZnO nanocomposites XRD pattern, in addition to the pure PRh peaks, there is a peak at around 21.5° which confirms the formation of PRh/ZnO nanocomposites. The strong peak at located at around 22° of the ZnO and PRh‐coated ZnO pattern corresponds to Zn(OH) 2 in the crystalline form . In terms of PRh/ZnO/Ni/Pt nanocatalyst, the intense diffraction peaks at 2θ= 39°, 46° and 68° are attributed to the (111), (200) and (220) planes of the cubic structure of crystalline Pt, respectively (JCPDS No.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of a Ni‐Pt Electrocatalyst Supported on PRh/ZnO Nanocomposites and Its Electrocatalytic Behaviour towards Methanol Electrooxidation

et al. 2019

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Polyrhodanine/Zinc Oxides (PRh/ZnO) nanocomposites were successfully synthesized through an in‐situ polymerization method. After that, the nanocomposites served as a substrate for bimetallic nickel‐platinum (Ni−Pt) to form PRh/ZnO/Ni/Pt electrocatalyst. Characterization methods including field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) and x‐ray diffraction analysis (XRD) were then employed to investigate the morphology and chemical structure of synthesized samples. Next, the electrochemical activity of fabricated PRh/ZnO/Ni/Pt electrocatalyst in methanol electrooxidation reaction in alkaline media was investigated via cyclic voltammetry (CV) and chronoamperometric (CA) measurements. The experimental results indicated that the addition of Ni to the synthesized PRh/ZnO/Pt led to a higher electrochemically active surface area (EASA). Also, from the CV tests, a desirable amount of maximum anodic current density was achieved for the PRh/ZnO/Ni/Pt, which was as much as 35 mA cm−2. With regard to the density functional theory (DFT) calculations, computational results suggested that utilizing the PRh/ZnO structure beside Ni and Pt resulted in the improvement of the reactivity of catalyst and a decrease in the energy gap which was consistent with the experimental findings.

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The role of hydrothermal pathways in the evolution of the morphology of ZnO crystals

Cited by 31 publications

References 45 publications

A novel hybrid polyurethane composites with ZnO particles and sheath palm residues: Synergistic effect

A novel hybrid polyurethane composites with ZnO particles and sheath palm residues: Synergistic effect

Biosynthesis of Zinc Oxide (ZnO) Using the Biomass of Aspergillus niger to Impart Cotton Fabric with Antimicrobial Properties

Synthesis of a Ni‐Pt Electrocatalyst Supported on PRh/ZnO Nanocomposites and Its Electrocatalytic Behaviour towards Methanol Electrooxidation

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