Effect of pH on the morphology and optical properties of modified ZnO particles by SDS via a precipitation method

Samaele, N.; Amornpitoksuk, Pongsaton; Suwanboon, Sumetha

doi:10.1016/j.powtec.2010.05.014

Cited by 101 publications

(40 citation statements)

References 27 publications

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“…The E g values for ZnO film were found to be 3.30 eV for Ni coated and 3.29 eV for Au and Pt coated glass substrate. The differences of E g values obtained were attributed to the changing in their surface microstructures, morphologies of the grown samples and crystallite size [8]. …”

Section: Resultsmentioning

confidence: 95%

Morphology and Optical Properties of Zinc Oxide Films Grown on Metal Coated Glass Substrates by Aqueous Chemical Growth

Bakar

Hamid

Jalar

et al. 2013

J. Phys.: Conf. Ser.

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Section: Resultsmentioning

confidence: 95%

Morphology and Optical Properties of Zinc Oxide Films Grown on Metal Coated Glass Substrates by Aqueous Chemical Growth

Bakar

Hamid

Jalar

et al. 2013

J. Phys.: Conf. Ser.

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“…On the other hand, the formation of the flower-like ZnO can be attributed to the different growth rate of the various crystal facets. Reactions (4) and (5) are responsible for the formation of ZnO nanoflower [26]. Figure 2 shows the XRD patterns of ZnO:Fe with different morphologies.…”

Section: Resultsmentioning

confidence: 99%

Effect of 3D ZnO:Fe morphology on the photocatalytic activity under solar irradiation

Dong

Wei

et al. 2011

Res Chem Intermed

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Nanoparticles, microsphere, hedgehog sphere-like and flower-like ZnO:Fe photocatalysts were prepared by the hydrothermal method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet/visible absorption spectra (UV-Vis). The results show that the ZnO:Fe photocatalysts with different 3D morphologies are a hexagonal wurtzite structure with space group of p63mc. The pH value of the precursor has a great influence on various morphologies of ZnO:Fe photocatalysts. The flower-like and hedgehog sphere-like ZnO:Fe photocatalysts exhibit the high solar photocatalytic behavior on methylene blue (MB). The ZnO:Fe order of photocatalytic activity is as follows: flower [ hedgehog sphere [ microsphere [ nanoparticle. The flower-like ZnO:Fe is optimal, which exhibits the highest degradation rate of 98% for light time of 5 h.

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“…Then 172.8 g of SDS and 0.2 M of sodium hydroxide were added into the above solution under continuous stirring till pH value reached 12 and heated at 160 0 C for 14 h in an oven. The precipitates were recovered by centrifugation and washed with deionized water and ethanol several times [16]. The product was dried at 60 0 C for 3 h and labelled as uncalcined zinc oxide (Znc).…”

Section: Preparation Of Zno Nanoparticlesmentioning

confidence: 99%

“…The following chemical reactions are involved during the synthesis of ZnO nanoparticles [16] [15]. However, the latter possibility is unlikely due to the difference in ionic radii between Ag + (1.22 Å) and Zn 2+ (0.72 Å); the silver particles preferentially choose to segregate around the ZnO grain boundaries.…”

Section: Synthesis Of Zinc Oxidementioning

confidence: 99%

Synthesis, characterization and photocatalytic activities of Ag-N-codoped ZnO nanoparticles for degradation of methyl red

Welderfael¹,

Yadav²,

Taddesse³

et al. 2013

Bull. Chem. Soc. Eth.

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ABSTRACT. Ag-N-codoped zinc oxide nanoparticles were synthesized by a one-step impregnation of Ag in N-doped ZnO nanoparticles. The morphologies and structures of the as-synthesized nanomaterials were investigated by using X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-Vis spectrophotometric techniques. Photocatalytic degradation of methyl red dye using synthesized photocatalysts was studied under solar as well as UV irradiations. Modified zinc oxide photocatalysts showed higher photocatalytic activity compared to pure zinc oxide both under solar as well as UV irradiations. Calcined zinc oxide shows better photocatalytic activity than commercial zinc oxide under both solar and UV irradiations. Highest catalytic activity of Ag-N co-doped zinc oxide (ANZ) among the undoped, Ag-doped and N-doped photocatalysts was attributed to the lower rate of recombination of the photogenerated electrons and holes as well as its lower band gap energy. Photocatalytic degradation of methyl red dye follows pseudo first order kinetics for all the nanoparticles so-obtained.

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Effect of pH on the morphology and optical properties of modified ZnO particles by SDS via a precipitation method

Cited by 101 publications

References 27 publications

Morphology and Optical Properties of Zinc Oxide Films Grown on Metal Coated Glass Substrates by Aqueous Chemical Growth

Morphology and Optical Properties of Zinc Oxide Films Grown on Metal Coated Glass Substrates by Aqueous Chemical Growth

Effect of 3D ZnO:Fe morphology on the photocatalytic activity under solar irradiation

Synthesis, characterization and photocatalytic activities of Ag-N-codoped ZnO nanoparticles for degradation of methyl red

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