Role of precursor dependent nanostructures of ZnO on its optical and photocatalytic activity and influence of FRET between ZnO and methylene blue dye on photocatalysis

Dey, Smita; Das, Souvik; Kar, Asit Kumar

doi:10.1016/j.matchemphys.2021.124872

Cited by 23 publications

(5 citation statements)

References 36 publications

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“…So, the higher degradation efficiency of MZ-25 was found. To large overlap for the emission states of prepared catalysts and AO-2 absorption states presented the highest degradation performance rate [38].…”

Section: Fret In Photocatalytic Degradation Of the Prepared Catalystsmentioning

confidence: 96%

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Rapidly chemical preparation of Mn doped ZnO nanostructures for photocatalysis efficiency based on UV light system and mechanism insights

Fatolahi,

Janani

2024

Phys. Scr.

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Through a facile chemical precipitation process, pure zinc oxide (ZnO) and various ratio of Mn-doped zinc oxide (Zn1-xMnxO) nanostructured materials were synthesized. The degradation of an azo dye acid orange 2 (AO-2) solution under UV light was investigated using the synthesized materials as photocatalysts. XRD, FTIR, DLS, FESEM, EDS, PL, BET, magnetic, TGA and UV-vis techniques were used to elucidate the structural, functional, particle, elemental, morphological, and optical aspects of the catalysts. The XRD and FESEM analysis showed the hexagonal ZnO structure and spherical shape of the ZnO nano-photocatalyst, respectively. Under UV irradiation for 60 minutes, MZ-25 NPs demonstrated better degradation (100.0%) of AO-2 dye. The effect of various factors such as catalyst quantity, and pH of the dye solution on the rate removal was investigated. After 60 minutes of UV light irradiation, dye removal was obtained under ideal conditions (with catalyst loading of 3 mgL-1, and pH 4).

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Section: Fret In Photocatalytic Degradation Of the Prepared Catalystsmentioning

confidence: 96%

“…The overlap causes the energy transfer between catalyst and AO-2 dye and degradation was conducted. From FRET theory, overlap integral J can be described as [38] J I d 4…”

Section: Fret In Photocatalytic Degradation Of the Prepared Catalystsmentioning

confidence: 99%

Rapidly chemical preparation of Mn doped ZnO nanostructures for photocatalysis efficiency based on UV light system and mechanism insights

Fatolahi,

Janani

2024

Phys. Scr.

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“…Flower-like structure of ZnO was obtained with an average size of 5–7 µm when NO 3 − anion precursor was used while rod-like ZnO was attained when Cl − anion was used. Dey et al (2021) reported on the precursor-dependent nanostructures of ZnO. Zn(CH 3 COO) 2 , Zn(NO 3 ) 2 ·6H 2 O and, ZnCl 2 were used in the hydrothermal synthesis of ZnO at 120°C.…”

Section: Anion Directed Synthesis Of Metal Oxidesmentioning

confidence: 99%

“…During the dehydration and oxidation process, the rod-like shape is not changed except for the size. It can be said that nanorod-like geometry is the intrinsic formation of the case of Cl − ( C. Nehru et al, 2012 ; Kaenphakdee et al, 2022 ; Dey et al, 2021 ). Apart from that, Cl − directs the growth of particles into tube-like or wire-like particles.…”

Section: Anion Directed Synthesis Of Metal Oxidesmentioning

confidence: 99%

Role of Anions in the Synthesis and Crystal Growth of Selected Semiconductors

2022

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The ideal methods for the preparation of semiconductors should be reproducible and possess the ability to control the morphology of the particles with monodispersity yields. Apart from that, it is also crucial to synthesize a large quantity of desired materials with good control of size, shape, morphology, crystallinity, composition, and surface chemistry at a reasonably low production cost. Metal oxides and chalcogenides with various morphologies and crystal structures have been obtained using different anion metal precursors (and/or different sulfur sources for chalcogenides in particular) through typical synthesis methods. Generally, spherical particles are obtained as it is thermodynamically favorable. However, by changing the anion precursor salts, the morphology of a semiconductor is influenced. Therefore, precursors having different anions show some effects on the final forms of a semiconductor. This review compiled and discussed the effects of anions (NO3−, Cl−, SO42-, CH3COO−, CH(CH3)O−, etc.) and different sources of S2- on the morphology and crystal structure of selected metal oxides and chalcogenides respectively.

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“…Among various metal oxides, ZnO nanoparticles are frequently used due to their biofunctionality, photocatalytic efficiency, and gas sensing properties with varying chemical components, architectures, and microstructures. The II-VI group of ZnO nanoparticles has a high band gap of~3.37 eV, along with large excitation binding energy (60 meV) [4][5][6][7][8][9][10]. These intrinsic properties of zinc oxide enable its application in water purification because of its easily movable valence band electrons, which is highly favorable for the photodegradation of organic pollutants in water.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic and Biological Activity of ZnO Nanoparticles Using Honey

Sharmila¹,

Mani²,

Kader³

et al. 2021

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The innovation and development of water purification methods have been at the center of extensive research for several decades. Many nanoparticles are frequently seen in industrial waste water. In this research, zinc oxide nanoparticles (ZnO) were synthesized following an autocombustion method with and without honey capping. Structural crystallinity and bonding structure were examined via X-ray diffraction (XRD) analysis and Fourier transform infrared (FTIR) spectroscopy. Optical behavior was analyzed using ultraviolet–visible (UV–Vis) spectroscopy and photoluminescence (PL). Size estimation and surface morphology were studied using scanning electron microscopy (SEM), while energy-dispersive spectroscopy (EDS) was performed to analyze the sample purity and elemental composition. The photocatalytic degradation of methylene blue (MB) by ZnO was assessed as it is an efficient water treatment process with high potential. The biological activity of ZnO nanoparticles was also investigated in terms of antibacterial and antifungal activities against different bacterial and fungal species. Surprisingly, the as-synthesized ZnO nanoparticles were found to be substantially bioactive compared to conventional drugs. Honey-mediated nanoparticles displayed 86% dye degradation efficiency, and that of bare ZnO was 60%. Therefore, the involvement of honey in the synthesis of ZnO nanoparticles has great potential due to its dual applicability in both biological and environmental remediation processes.

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Role of precursor dependent nanostructures of ZnO on its optical and photocatalytic activity and influence of FRET between ZnO and methylene blue dye on photocatalysis

Cited by 23 publications

References 36 publications

Rapidly chemical preparation of Mn doped ZnO nanostructures for photocatalysis efficiency based on UV light system and mechanism insights

Rapidly chemical preparation of Mn doped ZnO nanostructures for photocatalysis efficiency based on UV light system and mechanism insights

Role of Anions in the Synthesis and Crystal Growth of Selected Semiconductors

Photocatalytic and Biological Activity of ZnO Nanoparticles Using Honey

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