Preparation and characterization of ZnO, MgO and ZnO–MgO hybrid nanomaterials using green chemistry approach

Pachiyappan, Jayakaran; Gnanasundaram, Nirmala; Rao, Govindarajan Lakshmana

doi:10.1016/j.rinma.2020.100104

Cited by 31 publications

(11 citation statements)

References 25 publications

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“…The precipitation method has been used extensively to prepare ZnO NPs [ 9 , 10 , 11 , 12 , 13 , 14 ]. Recently, Lam et al synthesized iron-doped ZnO (Fe-ZnO) nanoparticles according to a simple and green method utilizing Hibiscus rosa-sinensis leaf extract, reporting the properties of these nanoparticles for the inactivation of Escherichia coli ( E. coli ) under sunlight irradiation [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Sunlight Photocatalytic Performance of ZnO Nanoparticles Synthesized by Green Chemistry Using Different Botanical Extracts and Zinc Acetate as a Precursor

et al. 2021

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In this work, the assessment of Azadirachta indica, Tagetes erecta, Chrysanthemum morifolium, and Lentinula edodes extracts as catalysts for the green synthesis of zinc oxide nanoparticles (ZnO NPs) was performed. The photocatalytic properties of ZnO NPs were investigated by the photodegradation of methylene blue (MB) dye under sunlight irradiation. UV-visible (UV-Vis) spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Thermogravimetric (TGA), and Brunauer-Emmett-Teller analysis (BET) were used for the characterization of samples. The XRD results indicate that all synthesized nanoparticles have a hexagonal wurtzite crystalline structure, which was confirmed by TEM. Further, TEM analysis proved the formation of spherical and hemispherical nanoparticles of ZnO with a size in the range of 14–32 nm, which were found in aggregate shape; such a size was well below the size of the particles synthesized with no extract (~43 nm). ZnO NPs produced with Tagetes erecta and Lentinula edodes showed the best photocatalytic activity, matching with the maximum adsorbed MB molecules (45.41 and 58.73%, respectively). MB was completely degraded in 45 min using Tagetes erecta and 120 min using Lentinula edodes when subjected to solar irradiation.

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Section: Introductionmentioning

confidence: 99%

Sunlight Photocatalytic Performance of ZnO Nanoparticles Synthesized by Green Chemistry Using Different Botanical Extracts and Zinc Acetate as a Precursor

et al. 2021

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“…In the O 1s spectrum (Figure 5e), the O 1s peak could be divided into two peaks at 529.1 and 529.6 eV, which were attributed to the metal–oxygen bonds. [ 30,31 ] Two peaks centered at 337.2 and 342.4 eV (Figure 5f) were attributed to Pd 3d 5/2 and Pd 3d 3/2 , respectively. The valence band energy (EVB) of BiVO 4 was 1.83 eV (Figure 5g).…”

Section: Resultsmentioning

confidence: 99%

Prepared Pd/MgO/BiVO₄ composite for photoreduction of CO₂ to CH₄

Zhu

Hwang

Liang

et al. 2021

J Chinese Chemical Soc

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In this study, several Pd/MgO/BiVO 4 nanocomposites were prepared using the hydrothermal method and their effective photocatalyst activity for the photoreduction of CO 2 to CH 4 was investigated. The microstructure and photocatalytic behavior of the prepared photocatalysts were studied through X-ray diffraction, scanning electron microscopy, tunneling electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible spectrophotometry, Fourier-transform infrared spectroscopy, Brunauer-Emmett-Teller specific surface area, and photoluminescence spectroscopy. CH 4 yields of 5.9 and 9.4 μmol g À1 hr À1 were obtained using BiVO 4 and 25% MgO/BiVO 4 nanocomposites, respectively. The highest production rate of CH 4 was measured as 12.8 μmol g À1 hr À1 on overloading 0.3% Pd on 25% MgO/BiVO 4 . Pd/MgO/BiVO 4 exhibited excellent CO 2 photoreduction stability with negligible loss after five consecutive cycles. Finally, a possible mechanism of CO 2 photoreduction using Pd/MgO/BiVO 4 was proposed for understanding the synergistic effects. The results of the experiment revealed that Pd/MgO/BiVO 4 can be a promising photocatalyst in solar energy conversion and storage application and can achieve excellent CO 2 photoreduction performance.

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“…Furthermore, secondary phases relating to Mg (OH) 2 and FTO glass substrate were observed in the XRD spectra. Interestingly, aside these known phases no other peaks relating to impurities were found [8]. The presence of Mg (OH) 2 was localised at angle (2θ) = 37.89 • and 51.49 • which correspond to 101 and 102 planes.…”

Section: Methodsmentioning

confidence: 99%

“…Magnesium oxide ex-hibits the cubic crystalline structure and has interesting properties because of its thermal and chemical stability properties [4]. It is non-toxic and has been employed as a layer material for the fabrication of thin film transistors (TFTs) for nextgeneration of electronic devices owing to its large dielectric constant (9.8) [5,6,7,8].…”

Section: Introductionmentioning

confidence: 99%

Influence of Bath pH values on the Structural and Optical Properties of Electrodeposited MgO Thin Films for Optoelectronic applications

Onuegbu

Oluyamo

Olusola

2023

J. Nig. Soc. Phys. Sci.

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This paper investigates the influence of bath pH values on the structural and optical properties of magnesium oxide (MgO) thin films synthesized using electrodeposition technique. The films were deposited on conductive fluorine tin oxide (FTO) substrates using magnesium nitrate hexahydrate as a precursor material. The structural, morphological and optical properties of the electrodeposited films were examined by scanning electron microscopy (SEM), X-ray diffraction and UV-Vis spectrophotometer. The morphology and optical properties of the films were found to vary with bath pH values. The band gap decreased as the bath pH values increased. The deposited MgO films exhibited average transmittance of 80%, 50%, and 25% with thicknesses 400 nm, 480 nm, and 540 nm for bath pH values of 2.0, 5.0, and 9.0, respectively. The results obtained indicate that bath pH values play significant role in the formation of MgO films and can be used to tune the material into useful optoelectronic applications.

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Preparation and characterization of ZnO, MgO and ZnO–MgO hybrid nanomaterials using green chemistry approach

Cited by 31 publications

References 25 publications

Sunlight Photocatalytic Performance of ZnO Nanoparticles Synthesized by Green Chemistry Using Different Botanical Extracts and Zinc Acetate as a Precursor

Sunlight Photocatalytic Performance of ZnO Nanoparticles Synthesized by Green Chemistry Using Different Botanical Extracts and Zinc Acetate as a Precursor

Prepared Pd/MgO/BiVO₄ composite for photoreduction of CO₂ to CH₄

Influence of Bath pH values on the Structural and Optical Properties of Electrodeposited MgO Thin Films for Optoelectronic applications

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Preparation and characterization of ZnO, MgO and ZnO–MgO hybrid nanomaterials using green chemistry approach

Cited by 31 publications

References 25 publications

Sunlight Photocatalytic Performance of ZnO Nanoparticles Synthesized by Green Chemistry Using Different Botanical Extracts and Zinc Acetate as a Precursor

Sunlight Photocatalytic Performance of ZnO Nanoparticles Synthesized by Green Chemistry Using Different Botanical Extracts and Zinc Acetate as a Precursor

Prepared Pd/MgO/BiVO4 composite for photoreduction of CO2 to CH4

Influence of Bath pH values on the Structural and Optical Properties of Electrodeposited MgO Thin Films for Optoelectronic applications

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Prepared Pd/MgO/BiVO₄ composite for photoreduction of CO₂ to CH₄