One-step synthesis, characterisation, photocatalytic and bio-medical applications of ZnO nanoplates

Jayaprakash, N.; Suresh, R.; Rajalakshmi, S.; Raja, Sundaramoorthy; Sundaravadivel, E.; Gayathri, M.; Sridharan, M.

doi:10.1080/10667857.2019.1659533

Cited by 30 publications

(9 citation statements)

References 56 publications

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“…The direct energy band gap of the samples was calculated according to the Tauc’s equation ( Figure 6 b). The band gap of pure ZnO was estimated to be ∼3.19 eV, a value close to the reported in the literature [ 62 ], and for ZnO–rGO was 3.17 eV and 3.08 eV with the addition of 1.0 and 12.5 mg/mL of GO suspension, respectively. The observed reduction in the band gap energy occurs with the incorporation of rGO and the reduction is more prominent in higher concentrations of rGO in the composite, mainly due to the formation of Zn-O-C chemical bonds in the ZnO–rGO composites [ 55 , 57 ].…”

Section: Resultssupporting

confidence: 85%

Unravelling the Role of Synthesis Conditions on the Structure of Zinc Oxide-Reduced Graphene Oxide Nanofillers

2021

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The diversity of zinc oxide (ZnO) particles and derived composites applications is highly dependent on their structure, size, morphology, defect amounts, and/or presence of dopant molecules. In this work, ZnO nanostructures are grown in situ on graphene oxide (GO) sheets by an easily implementable solvothermal method with simultaneous reduction of GO. The effect of two zinc precursors (zinc acetate (ZA) and zinc acetate dihydrate (ZAD)), NaOH concentration (0.5, 1 or 2 M), and concentration (1 and 12.5 mg/mL) and pH (pH = 1, 4, 8, and 12) of GO suspension were evaluated. While the ZnO particle morphology shows to be precursor dependent, the average particle size length decreases with lower NaOH concentration, as well as with the addition of a higher basicity and concentration of GO suspension. A lowered band gap and a higher specific surface area are obtained from the ZnO composites with higher amounts of GO suspension. Otherwise, the low concentration and the higher pH of GO suspension induce more lattice defects on the ZnO crystal structure. The role of the different condition parameters on the ZnO nanostructures and their interaction with graphene sheets was observed to tune the ZnO–rGO nanofiller properties for photocatalytic and antimicrobial activities.

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Section: Resultssupporting

confidence: 85%

Unravelling the Role of Synthesis Conditions on the Structure of Zinc Oxide-Reduced Graphene Oxide Nanofillers

2021

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“…ZnO is widely used in industry for the production of solar cells, light-emitting diodes and transistors, sensors, UV-protecting coatings, baby powders, vulcanization products, and for improving concrete and ceramic quality [ 2 , 3 , 4 , 5 ]. Photocatalytic, antibacterial, food-packaging, and medical (cancer-treatment) applications of ZnO are considered fast-developing technology [ 6 , 7 , 8 ]. The interest of this work is based on the photocatalytic properties of ZnO, especially those related to the photodegradation of surrounding chemicals in water, the process that can be used in water purification [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Methylene Blue Photodegradation Rate Using Laser Synthesized Ag-Doped ZnO Nanoparticles

et al. 2022

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In this work, Ag-doped ZnO nanoparticles are obtained via pulsed laser ablation of the Ag-coated ZnO target in water. The ratio of Ag dopant in ZnO nanoparticles strongly depends on the thickness of the Ag layer at the ZnO target. Synthesized nanoparticles were characterized by XRD, XPS, SEM, EDS, ICP-OES, and UV–VIS spectrophotometry to obtain their crystal structure, elemental composition, morphology and size distribution, mass concentration, and optical properties, respectively. The photocatalytic studies showed photodegradation of methylene blue (MB) under UV irradiation. Different ratios of Ag dopant in ZnO nanoparticles influence the photodegradation rate. The ZnO nanoparticles doped with 0.32% silver show the most efficient photodegradation rate, with the chemical reaction constant of 0.0233 min−1. It exhibits an almost twice as large photodegradation rate compared to pure ZnO nanoparticles, showing the doping effect on the photocatalytic activity.

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“…(vi) ZnO has a tunable optical band gap, which can be altered by changing the composition, morphology, size etc. (vii) Another distinct advantage is that ZnO is considered a biosafe and biocompatible compound, as a trace amount of Zinc is present in the human body (Jayaprakash et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

A Review on Synthesis and Optoelectronic Applications of Nanostructured ZnO

2021

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Nanostructured ZnO has gained a lot of interest as a suitable material for various applications, especially sensing, energy conversion, and storage. ZnO nanostructures can be synthesized in several ways. It is one of the materials that can be prepared in a variety of morphologies including hierarchical nanostructures. This review article presents a review of current research activities on the growth of ZnO Nanorods. The article covers various water-based routes of synthesis and is further characterized by the type of substrate used for the growth. The growth factors involved in the hydrothermal and chemical bath deposition methods are discussed. These factors include the variety of precursors, time, temperature, and the seeding method employed. At the end, applications such as gas sensing and improvement in Opto-electric properties are discussed.

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One-step synthesis, characterisation, photocatalytic and bio-medical applications of ZnO nanoplates

Cited by 30 publications

References 56 publications

Unravelling the Role of Synthesis Conditions on the Structure of Zinc Oxide-Reduced Graphene Oxide Nanofillers

Unravelling the Role of Synthesis Conditions on the Structure of Zinc Oxide-Reduced Graphene Oxide Nanofillers

Enhancement of Methylene Blue Photodegradation Rate Using Laser Synthesized Ag-Doped ZnO Nanoparticles

A Review on Synthesis and Optoelectronic Applications of Nanostructured ZnO

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