Effect of annealing temperature on structural, optical, and photocatalytic properties of modified sol–gel‐driven ZnO nanoparticles

Ayon, Sikder Ashikuzzaman; Billah, Muktadir; Hossain, Mohammad Nazmul

doi:10.1002/sia.7203

Cited by 3 publications

(2 citation statements)

References 23 publications

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“…In recent years, semiconductor metal oxides and sulfides, such as TiO 2 , ZnO, Fe 2 O 3 , and CuO, have been widely used in photocatalytic activity for the degradation of contaminants 1–4 . TiO 2 and ZnO are two of the most common photocatalytic substances discovered in the literature 5–8 . However, TiO 2 , which is used mostly, is economically unviable for large‐scale manufacturing in water treatment.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of structural, optical, and photocatalytic properties of ZnO synthesized by chemical coprecipitation and modified sol–gel methods

Mondal

Ayon

Billah

2023

Surface & Interface Analysis

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In this study, the comparative analysis of the structural, optical, and photocatalytic properties of ZnO nanoparticles (NPs) synthesized by two different methods is carried out. Both samples were annealed at 500 C and yielded crystalline ZnO with hexagonal wurtzite crystalline structures. Average crystallite sizes of 17 and 28 mm were found for chemical coprecipitation and modified sol-gel method, respectively.The crystallinity of ZnO NPs synthesized by the chemical coprecipitation method was comparatively higher than ZnO NPs synthesized by the modified sol-gel method. SEM revealed near-spherical NPs in both cases, where the particle size of 100 nm was observed for the chemical coprecipitation approach compared with the particle size of 38 mm for ZnO NPs. The bandgap value from both processes did not show any significant differences and was calculated at around 3.25 eV.Photocatalytic activity of ZnO synthesized by chemical coprecipitation and modified sol-gel methods was measured by degrading rhodamine B (RhB) under UV irradiation. The NPs produced by the modified sol-gel route showed significantly superior photocatalytic activity under similar conditions. The variations of these results show that even slight variations in ZnO structural and morphological characteristics have a significant impact on the optical properties as well as photocatalytic efficacy of these NPs.

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Section: Introductionmentioning

confidence: 99%

Comparative study of structural, optical, and photocatalytic properties of ZnO synthesized by chemical coprecipitation and modified sol–gel methods

Mondal

Ayon

Billah

2023

Surface & Interface Analysis

Self Cite

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show abstract

“…Several methods like chemical vapor deposition (CVD), 9 metal–organic CVD (MOCVD), 10 pulsed laser deposition (PLD), 11 sol–gel, 12 hydrothermal, solvothermal, 13 precipitation, 14 and thermal decomposition methods 15 are routinely adopted to synthesize ZnO nanoparticles in the desired shape and size. 16 Based on the application, the appropriate methodology is adopted.…”

Section: Introductionmentioning

confidence: 99%

Modification in Toxicity of l-Histidine-Incorporated ZnO Nanoparticles toward Escherichia coli

Mahakal,

Pathan,

Prasad

et al. 2023

ACS Omega

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This paper presents a comparative study of the toxicity of pristine-ZnO and l-histidine-incorporated ZnO toward Escherichia coli (E. coli) as a Gram-negative model organism. Pristine-ZnO and l-histidine-incorporated ZnO with different l-histidine concentrations were synthesized using an open aqueous solution bath technique. XRD studies revealed the formation of polycrystalline wurtzite ZnO. The average crystallite size of the synthesized l-histidine-incorporated ZnO decreased as the concentration of l-histidine increased. The FTIR spectra showed the presence of Zn–O, CO2 –/CO3 –, and C–N (only in l-histidine-incorporated ZnO samples) and −OH bond vibration signals in all samples. The chemical purity of all the samples was ensured using XPS analysis. The microbial activity of these samples was investigated using E. coli. The solution with 100 μg/mL ZnO in sterile distilled water showed up to 94% growth inhibition of E. coli, establishing antibacterial activity. However, l-histidine incorporated in ZnO showed reduced antibacterial activity with the increase of the concentration of l-histidine in ZnO. Furthermore, flow cytometry studies during the interaction of ZnO and E. coli confirmed the generation of reactive oxygen species (ROS), validating its antibacterial activity. The interaction of l-histidine-incorporated ZnO and E. coli showed declining ROS with the increase in the l-histidine concentration, indicating a ZnO toxicity reduction.

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Phase engineered enhancement of photocatalytic and Opto-magnetic properties of CuO nanoparticles through fluorine and gadolinium doping

Jamal,

Mondal,

Ayon

et al. 2024

Materials Science in Semiconductor Processing

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Effect of annealing temperature on structural, optical, and photocatalytic properties of modified sol–gel‐driven ZnO nanoparticles

Abstract: ZnO nanoparticles (NPs) were synthesized in this study using a modified sol-gel route.Synthesized NPs were annealed at various temperatures, namely, 400, 500, 600, and 700 C, to optimize annealing temperature to make the NPs suitable for photocatalytic

Cited by 3 publications

References 23 publications

Comparative study of structural, optical, and photocatalytic properties of ZnO synthesized by chemical coprecipitation and modified sol–gel methods

Comparative study of structural, optical, and photocatalytic properties of ZnO synthesized by chemical coprecipitation and modified sol–gel methods

Modification in Toxicity of l-Histidine-Incorporated ZnO Nanoparticles toward Escherichia coli

Phase engineered enhancement of photocatalytic and Opto-magnetic properties of CuO nanoparticles through fluorine and gadolinium doping

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