Microwave Driven Hydrothermal Synthesis of Zinc Oxide Nanopowders

Strachowski, Tomasz; Grzanka, Ewa; Pałosz, B.; Presz, A.; Ślusarski, L.; Łojkowski, Witold

doi:10.4028/www.scientific.net/ssp.94.189

Cited by 19 publications

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“…Many forms could be obtained in the microwave synthesis of ZnO nanomaterials (NMs), e.g., spherical particles, rods, flowers, needles, whiskers and layers [ 11 , 12 , 18 , 24 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 ], where the control of ZnO NMs size is possible by changing the synthesis duration, substrate concentration, substrate type, process temperature, solvent type, pH and addition of surfactants [ 11 , 18 , 19 , 38 , 39 , 40 , 41 , 42 , 43 ]. However, the size control of the forming aggregates is not a very commonly discussed aspect of ZnO NPs synthesis.…”

Section: Introductionmentioning

confidence: 99%

Effect of Microwave Radiation Power on the Size of Aggregates of ZnO NPs Prepared Using Microwave Solvothermal Synthesis

et al. 2018

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This paper reports the possibility of changing the size of zinc oxide nanoparticles (ZnO NPs) aggregates through a change of synthesis parameters. The effect of the changed power of microwave heating on the properties of ZnO NPs obtained by the microwave solvothermal synthesis from zinc acetate dissolved in ethylene glycol was tested for the first time. It was found that the size of ZnO aggregates ranged from 60 to 120 nm depending on the power of microwave radiation used in the synthesis of ZnO NPs. The increase in the microwave radiation power resulted in the reduction of the total synthesis time with simultaneous preservation of the constant size and shape of single ZnO NPs, which were synthesized at a pressure of 4 bar. All the obtained ZnO NPs samples were composed of homogeneous spherical particles that were single crystals with an average size of 27 ± 3 nm with a developed specific surface area of 40 m2/g and the skeleton density of 5.18 ± 0.03 g/cm3. A model of a mechanism explaining the correlation between the size of aggregates and the power of microwaves was proposed. This method of controlling the average size of ZnO NPs aggregates is presented for the first time and similar investigations are not found in the literature.

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Section: Introductionmentioning

confidence: 99%

Effect of Microwave Radiation Power on the Size of Aggregates of ZnO NPs Prepared Using Microwave Solvothermal Synthesis

et al. 2018

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“…The analysis shows that calcination treatment results in more separated product with well‐defined morphology as compared to the product without calcination treatment. Different morphologies of ZnO nanomaterial have been reported as nanoflakes, nanorods,, nanospheres, nanoneedles, nanowires, nanopowder, nanofilms,, nanobelts,, nanodiscs, nanoflowers and nanotubes etc. but tubes and flowers have not been reported yet through any preparation technique.…”

Section: Resultsmentioning

confidence: 99%

Layer by Layer Assembly of Zinc Oxide Nanotubes and Nanoflowers as Catalyst for Separate and Simultaneous Catalytic Degradation of Dyes and Fuel Additive

et al. 2019

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Zinc oxide nanotubes and nanoflowers are synthesized using urea as template through hydrothermal technique. XRD confirmed that product is consists of zinc and oxygen atoms forming a hexagonal crystal system with ZnO chemical formula. SEM showed that tubes and flower like particles are formed. ATR‐IR confirmed the presence of Zn−O bond as a functional group. UV‐VIS spectroscopic analysis exhibits that product has a band gap energy of 3.49 eV. Synthesized product due to its outstanding properties such as wide band gap semiconductor and large surface area to volume ratio is used as a catalyst for individual and simultaneous catalytic degradation of methylene blue (MB) and Congo red (CR) dyes. The apparent rate constant (kapp) value of individual and simultaneous catalytic degradation of CR dye is decreased with increase in catalyst dosage while kapp value of individual and simultaneous catalytic degradation of MB dye is increased with increase in catalyst dosage. The synthesized product is found more active towards CR dye as compared to MB dye. Small size and high surface area to volume ratio of product also make it a desirable additive for enhancing the efficiency of diesel fuel. Results obtained from fuel additive activity show that as the concentration of nanoadditive is increased from 20, 40, 60, 80 and 100 ppm the calorific value is increased which indicates the enhanced efficiency of fuel due to additive.

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“…Several papers report hydrothermal synthesis of equiaxed ZnO crystallites with sizes under 100 nm [29,34,[43][44][45][46]48]. However, all of them used diluted precursors with concentrations well below 1 m, sometimes even as low as 0.001 m. Only Li et al [35,36] reported hydrothermal synthesis of ZnO with crystallite size of 70 nm from 1 M zinc acetate-based precursor.…”

Section: Effects Of the Synthesis Variables On The Properties Of The mentioning

confidence: 99%

Systematic study of hydrothermal crystallization of zinc oxide (ZnO) nano-sized powders with superior UV attenuation

Suchanek

2009

Journal of Crystal Growth

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Microwave Driven Hydrothermal Synthesis of Zinc Oxide Nanopowders

Cited by 19 publications

References 0 publications

Effect of Microwave Radiation Power on the Size of Aggregates of ZnO NPs Prepared Using Microwave Solvothermal Synthesis

Effect of Microwave Radiation Power on the Size of Aggregates of ZnO NPs Prepared Using Microwave Solvothermal Synthesis

Layer by Layer Assembly of Zinc Oxide Nanotubes and Nanoflowers as Catalyst for Separate and Simultaneous Catalytic Degradation of Dyes and Fuel Additive

Systematic study of hydrothermal crystallization of zinc oxide (ZnO) nano-sized powders with superior UV attenuation

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