Calcination-dependent microstructural and optical characteristics of eco-friendly synthesized ZnO nanoparticles and their implementation in analog memristor application

Pham, Quan Phu; Nguyen, Quy Ngoc Le; Nguyen, Ngoc Hong; Doan, Uyen Tu Thi; Ung, Thuy Dieu Thi; Trần, Vinh Cao; Phan, Thắng Bách; Phạm, Anh Tuấn; Pham, Ngoc Kim

doi:10.1016/j.ceramint.2023.03.206

Cited by 6 publications

(2 citation statements)

References 63 publications

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“…The results showed that the size of the crystallites was 55, 50, and 49 nm for samples ZnO_PL1%, ZnO_PL2%, and ZnO_PL4%, respectively. The size obtained in this study is within the range of previous reports in the literature for ZnO nanoparticles [ 38 ]. Research has demonstrated that using more extract in green synthesis results in smaller crystallites.…”

Section: Resultssupporting

confidence: 88%

“…The bands at 1384 and 1120 cm −1 are attributed to the C-H and C-O vibrations of the carboxylic groups present in the organic molecules of the Prosopis laevigata extract [ 36 , 37 ]. Finally, the band observed at 400 cm −1 in the three samples analyzed is attributed to the stretching of metal–oxygen (Zn-O), which confirms the obtaining of ZnO nanoparticles [ 38 ].…”

Section: Resultsmentioning

confidence: 72%

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Theoretical and Experimental Study of the Photocatalytic Properties of ZnO Semiconductor Nanoparticles Synthesized by Prosopis laevigata

Luque Morales,

Chinchillas Chinchillas

et al. 2023

Materials

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In this work, the photocatalytic activity of nanoparticles (NPs) of zinc oxide synthetized by Prosopis laevigata as a stabilizing agent was evaluated in the degradation of methylene blue (MB) dye under UV radiation. The theoretical study of the photocatalytic degradation process was carried out by a Langmuir–Hinshelwood–Hougen–Watson (LHHW) model. Zinc oxide nanoparticles were synthesized by varying the concentration of natural extract of Prosopis laevigata from 1, 2, and 4% (weight/volume), identifying the samples as ZnO_PL1%, ZnO_PL2%, and ZnO_PL4%, respectively. The characterization of the nanoparticles was carried out by Fourier transform infrared spectroscopy (FT-IR), where the absorption band for the Zn-O vibration at 400 cm−1 was presented; by ultraviolet–visible spectroscopy (UV–vis) the value of the band gap was calculated, resulting in 2.80, 2.74 and 2.63 eV for the samples ZnO_PL1%, ZnO_PL2%, and ZnO_PL4%, respectively; XRD analysis indicated that the nanoparticles have a hexagonal zincite crystal structure with an average crystal size of 55, 50, and 49 in the sample ZnO_PL1%, ZnO_PL2%, and ZnO_PL4%, respectively. The morphology observed by TEM showed that the nanoparticles had a hemispherical shape, and the ZnO_PL4% sample presented sizes ranging between 29 and 45 nm. The photocatalytic study showed a total degradation of the MB in 150, 120, and 60 min for the samples ZnO_PL1%, ZnO_PL2%, and ZnO_PL4%, respectively. Also, the model explains the experimental observation of the first-order kinetic model in the limit of low concentrations of dye, indicating the influence of the mass transfer processes.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 72%

Theoretical and Experimental Study of the Photocatalytic Properties of ZnO Semiconductor Nanoparticles Synthesized by Prosopis laevigata

Luque Morales,

Chinchillas Chinchillas

et al. 2023

Materials

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Enhanced Long‐Term Memory Properties of ZnO Nanoparticle‐Based Optical Synaptic Devices for Neuromorphic Computing

Oh,

Kim,

Kim

et al. 2023

Advanced Intelligent Systems

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The enhancement of long‐term memory properties in optical synaptic devices based on ZnO nanoparticles (NPs) is investigated. High‐temperature annealing improves crystal quality and carrier mobility, leading to efficient carrier generation and transport. The annealed ZnO NPs exhibit increased band edge luminescence and reduced deep‐level emission. Their larger surface grain size decreases oxygen adsorption, resulting in enhanced desorption by photoexcited carriers during UV exposure. The annealed devices show higher excitatory postsynaptic currents (EPSCs) and slower decay rates after UV termination, indicating better long‐term memory. They also demonstrate accelerated learning processes with fewer pulse cycles required to reach 100% EPSC. Overall, this research highlights the significance of high‐temperature annealing for improving long‐term memory in ZnO NP‐based optical synaptic devices, offering insights for advanced memory devices.

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Role of natural extracts on the synthesis and properties of semiconductor nanoparticles of ZnO applied in water treatment by photocatalytic processes

Quevedo Robles,

Santana Camacho,

Vilchis Nestor

et al. 2024

J Mater Sci: Mater Electron

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Calcination-dependent microstructural and optical characteristics of eco-friendly synthesized ZnO nanoparticles and their implementation in analog memristor application

Cited by 6 publications

References 63 publications

Theoretical and Experimental Study of the Photocatalytic Properties of ZnO Semiconductor Nanoparticles Synthesized by Prosopis laevigata

Theoretical and Experimental Study of the Photocatalytic Properties of ZnO Semiconductor Nanoparticles Synthesized by Prosopis laevigata

Enhanced Long‐Term Memory Properties of ZnO Nanoparticle‐Based Optical Synaptic Devices for Neuromorphic Computing

Role of natural extracts on the synthesis and properties of semiconductor nanoparticles of ZnO applied in water treatment by photocatalytic processes

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