Synthesis and characterization of zinc oxide prepared with ammonium hydroxide and photocatalytic application of organic dye under ultraviolet illumination

Moungsrijun, Sasimonton; Sujinnapram, Supphadate; Sutthana, Sutthipoj

doi:10.1007/s00706-017-1959-z

Cited by 9 publications

(5 citation statements)

References 28 publications

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“…The improved activity is believed to be due to the increased surface area and the reduced pore width. The mechanism of photocatalytic degradation can be briefly described in Equations (4)–(7) [ 2 , 31 , 32 ]: ZnO + hν → e − + h +

…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Wongrerkdee

Boonruang

et al. 2022

Toxics

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ZnO and Ti-doped ZnO (Ti-ZnO) nanoparticles were synthesized using rapid combustion. The morphology of ZnO and Ti-ZnO featured nanoparticles within cluster-like structures. The ZnO and Ti-ZnO structures exhibited similar hexagonal wurtzite structures and crystal sizes. This behavior occurred because Zn2+ sites of the ZnO lattice were substituted by Ti4+ ions. The chemical structure characterization implied the major vibration of the ZnO structure. The physisorption analysis showed similar mesoporous and non-rigid aggregation structures for ZnO and Ti-ZnO using N2 adsorption–desorption. However, Ti-ZnO demonstrated a specific surface area two times higher than that of ZnO. This was a major factor in improving the photocatalytic degradation of methylene blue (MB). The photocatalytic degradation analysis showed a kinetic degradation rate constant of 2.54 × 10−3 min−1 for Ti-ZnO, which was almost 80% higher than that of ZnO (1.40 × 10−3 min−1). The transformation mechanism of MB molecules into other products, including carbon dioxide, aldehyde, and sulfate ions, was also examined.

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…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Wongrerkdee

Boonruang

et al. 2022

Toxics

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“…The characteristic XRD patterns are matched to JCPD no. 36–1454, 22,23 which majorly correspond to the hexagonal wurtzite structure of ZnO. Besides, the diffraction patterns are not shifted indicating the nanocomposite formation.…”

Section: Resultsmentioning

confidence: 95%

“…The crystal size ( D ), dislocation density (ε), and texture coefficient ( T c ) were calculated using equations (4) to (6) as listed in Table 2 23,24,31,33,34 where k is a constant (0.89), β is the full-width at half-maximum intensity, I ( hkl ) is the intensity of preferred orientation plane from measurement, I 0( hkl ) is the standard intensity of preferred orientation plane from JCPDs, and N is the number of considered planes. The crystal size of GQDs–ZnO nanocomposites initially increases with the increase in the GQD concentration until it reaches the maximum value and slightly decreases afterward for all planes.…”

Section: Resultsmentioning

confidence: 99%

“…To analyze the kinetic performance of GQDs–ZnO photocatalytic material, it was calculated according to the pseudo-first-order kinetics in equation (8) 12,23 where k r and t are degradation rate constant and irradiation time, respectively. The k r value is estimated by linear fitting the curve of ln( A / A 0 ) versus irradiation time as shown in Figure 9 and listed in Table 3.…”

Section: Resultsmentioning

confidence: 99%

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Modified graphene quantum dots-zinc oxide nanocomposites for photocatalytic degradation of organic dyes and commercial herbicide

Phophayu

Pimpang

Wongrerkdee

et al. 2019

Journal of Reinforced Plastics and Composites

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The high crystallinity of graphene quantum dots-ZnO nanocomposites is considered to have a significant effect in improving the carrier lifetime for enhanced photocatalytic degradation. The graphene quantum dots-ZnO nanocomposites were synthesized by adding graphene quantum dots solution into starting precursors during the precipitation. Characterization was performed using various techniques. High crystallinity of graphene quantum dots-ZnO nanocomposites is obtained in terms of increased crystal size and decreased dislocation density. The improved crystallinity increases the carrier lifetime on the material surface for the functional improvement of photocatalytic material. Photocatalytic test of methylene blue and methyl orange was performed under UV irradiation. Degradation rate constant reaches the maximum value for both organic dyes for the appropriate preparing condition of graphene quantum dots-ZnO nanocomposites. The graphene quantum dots-ZnO nanocomposites were then applied to degrade commercial glyphosate herbicide contaminants for an agricultural wastewater treatment investigation. The investigation aims to demonstrate a facile useful way of herbicide contaminant reduction for the better health of farmers. The graphene quantum dots-ZnO nanocomposites show an enhancement of the photocatalytic process with improved degradation rate constant (23% increased) in comparison to pure ZnO. Therefore, this work demonstrates that graphene quantum dots-ZnO nanocomposites can be used as a photocatalytic material for degrading organic dyes and commercial herbicide contaminants owing to its low-cost and environmental-friendly properties.

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“…36-1451. 35,36 Sharp peaks in the XRD spectra further demonstrate the high degree of crystallinity of both pristine Z NPs and its nanocomposite with the respective quantum dots, with the diffraction peaks remaining consistent with that of the hexagonal structure of ZnO NPs. 37 The absence of significant peak shifting might be attributed to the synthetic strategy utilized in this case, wherein physical interaction between the components was the reason behind the formation of nanocomposites.…”

Section: ■ Introductionmentioning

confidence: 91%

Potential of Zinc Oxide-Graphene Quantum Dots and Zinc Oxide-Nitrogen-Doped Graphene Quantum Dot Nanocomposites as Neurotrophic Agents

Raghavan,

Tripathy,

Radhakrishnan

et al. 2023

ACS Appl. Bio Mater.

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Over the past few decades, zinc oxide nanoparticles have also proven to be essential to a variety of scientific research sectors, including antimicrobial therapy, tissue engineering, bioimaging, biosensors, drug delivery, gene delivery, and bioimaging. There is an urgent need to establish and develop unique alternative treatment modalities to treat neurodegenerative disorders due to the shortcomings of the existing drugs. As a possible therapy for brain diseases and disorders, the ability of the nanoparticles to cross the blood-brain barrier (BBB) as well as their reduced toxicity, solubility, and biodegradability has lately attracted attention. Scientists are quietly turning their attention to develop green synthesis of nanoparticles as an alternative to the physical and chemical techniques of producing the same. Existing literature has emphasized the use of ZnO for the potential treatment of cerebral ischemia and its neuroprotective properties. This work discusses the potential of ZnO prepared using Gynura cusimba extract and its nanocomposites with graphene quantum dots (GQDs) and its nitrogen doped variant, N-GQDs as neurotrophic agents, in accordance with our previous report on the use of GQDs and N-GQDs as neurotrophic agents. Pristine ZnO nanoparticles as well as composites were duly characterized by using several techniques to confirm the formation of the nanocomposites. Biological evaluation using the neurite outgrowth assay following the cell viability assay revealed that incorporation of GQDs and N-GQDs enhanced the neurite length in comparison to that of pristine ZnO with the nanocomposites of N-GQDs showing comparatively better results, corroborated by the real-time PCR studies as well.

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Synthesis and characterization of zinc oxide prepared with ammonium hydroxide and photocatalytic application of organic dye under ultraviolet illumination

Cited by 9 publications

References 28 publications

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Enhanced Photocatalytic Degradation of Methylene Blue Using Ti-Doped ZnO Nanoparticles Synthesized by Rapid Combustion

Modified graphene quantum dots-zinc oxide nanocomposites for photocatalytic degradation of organic dyes and commercial herbicide

Potential of Zinc Oxide-Graphene Quantum Dots and Zinc Oxide-Nitrogen-Doped Graphene Quantum Dot Nanocomposites as Neurotrophic Agents

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