Preparation and characterization of a ZnO powder with the hexagonal plate particles

Ada, Kezban; Gökgöz, Murat; Önal, Müşerref; Sarıkaya, Yüksel

doi:10.1016/j.powtec.2007.05.015

Cited by 40 publications

(21 citation statements)

References 56 publications

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“…The homogeneous precipitation method in aqueous solution and some physicochemical properties of such oxide powders as Al 2 O 3 and ZnO were investigated in our previous work [17,18] -1 (BET) was obtained by the calcination of the precursors at 500°C for 2 hours. JEOL JEM-transmission electron microscopy (TEM ) images were taken to determine the morphology and dimension of the nanoparticles.…”

Section: Methodsmentioning

confidence: 99%

Cytotoxicity and apoptotic effects of nickel oxide nanoparticles in cultured HeLa cells.

Ada

Türk²,

Oğuztüzün³

et al. 2011

Folia Histochem Cytobiol.

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Abstract:The aim of this study was to observe the cytotoxicity and apoptotic effects of nickel oxide nanoparticles on human cervix epithelioid carcinoma cell line (HeLa). Nickel oxide precursors were synthesized by an nickel sulphate-excess urea reaction in boiling aqueous solution. The synthesized NiO nanoparticles (<200 nm) were investigated by X-ray diffraction analysis and transmission electron microscopy techniques. For cytotoxicity experiments, HeLa cells were incubated in 50-500 μg/mL NiO for 2, 6, 12 and 16 hours. The viable cells were counted with a haemacytometer using light microscopy. The cytotoxicity was observed low in 50-200 μg/mL concentration for 16 h, but high in 400-500 μg/mL concentration for 2-6 h. HeLa cells' cytoplasm membrane was lysed and detached from the well surface in 400 μg/mL concentration NiO nanoparticles. Double staining and M30 immunostaining were performed to quantify the number of apoptotic cells in culture on the basis of apoptotic cell nuclei scores. The apoptotic effect was observed 20% for 16 h incubation.

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Section: Methodsmentioning

confidence: 99%

Cytotoxicity and apoptotic effects of nickel oxide nanoparticles in cultured HeLa cells.

Ada

Türk²,

Oğuztüzün³

et al. 2011

Folia Histochem Cytobiol.

Self Cite

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“…Among which, ZnO has wide applications in the areas such as solar cells [2][3][4], catalysis [5,6], sensors [7], laser diodes [8] and varistors [5,9]. Various techniques had been employed for the synthesis of the nano/micro structured ZnO such as sol-gel process [10], homogeneous precipitation [5], thermal decomposition [11], microwave heating [12], conventional hydrothermal [13][14][15], etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

2013

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Zinc oxide was synthesized from zinc sulphate using different reducing agents under microwave irradiation. The influence of sodium borohydride, hydrazine hydrate and urea on the shape and size of the products were investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). SEM showed the nano-sized spherical and rectangular shaped structures in case of sodium borohydride and hydrazine hydrate, whereas micro-sized hexagonal structures were formed in case of urea under the same irradiation power. The reducing agents played an important role in forming the various structures. Thus different shapes and size of structures were produced by only varying the reducing agent, which had wide applications in various fields.

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“…The second drop demonstrates a major weight loss at 390º C, and this could be attributed to the near complete decomposition of sodium alginate, which is the precursor used in this study. At 445 º C, the change in weight loss has become insignificant, and most of the sodium alginate present has been converted to carbonaceous products, leaving behind pure metal oxide as residue [18]. It is evident that the organic compound has completely decomposed after 450º C, therefore 500 º C was selected as the lower limit of calcination temperature of the extrusion dripped beads.…”

Section: Thermalgravimetric Analysis (Tga)mentioning

confidence: 99%

Green Synthesis of ZnO Nanoparticles by an Alginate Mediated Ion-Exchange Process and a case study for Photocatalysis of Methylene Blue Dye

Keong

Vivek

Salamatinia

et al. 2017

J. Phys.: Conf. Ser.

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Abstract. In this study, zinc oxide (ZnO) was prepared via extrusion-dripping method through an ion exchange mediated process using sodium alginate. The samples were synthesized at 500 ˚C and 600 ˚C to study the effect of calcination temperature. The morphology, microstructure and optical activity of the calcined ZnO nanoparticles were analyzed by TGA, FESEM and XRD. It was found that ZnO nanoparticles synthesized at 600 ˚C was of higher purity with high crystallinity. To enhance the photocatalytic efficiency of zinc oxide, ZnO/NCC films were synthesized at varying ZnO loading fractions of 10 wt%, 15 wt%, 20 wt% and 25 wt% and were evaluated by photodegradation of Methylene blue dye and the highest dye percentage removal is found to be 96% which is obtained at ZnO loadings of 25 wt%. The usage of ionexchange process has shown promising results in producing ZnO of desirable characteristics.

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Preparation and characterization of a ZnO powder with the hexagonal plate particles

Cited by 40 publications

References 56 publications

Cytotoxicity and apoptotic effects of nickel oxide nanoparticles in cultured HeLa cells.

Cytotoxicity and apoptotic effects of nickel oxide nanoparticles in cultured HeLa cells.

Effect of reducing agents on the structure of zinc oxide under microwave irradiation

Green Synthesis of ZnO Nanoparticles by an Alginate Mediated Ion-Exchange Process and a case study for Photocatalysis of Methylene Blue Dye

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