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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机译:本文报道了通过改变合成参数来改变氧化锌纳米粒子(ZnO NPs)聚集体尺寸的可能性。首次测试了微波加热功率的变化对由乙酸锌溶解在乙二醇中的微波溶剂热合成制得的ZnO NPs性质的影响。发现ZnO聚集体的尺寸在60至120nm范围内,这取决于用于ZnO NPs合成的微波辐射的功率。微波辐射功率的增加导致总合成时间的减少,同时保留了在4 bar压力下合成的单个ZnO NP的恒定大小和形状。所有获得的ZnO NPs样品均由均匀的球形颗粒组成,这些颗粒为单晶,平均尺寸为27±3 nm,比表面积为40 m 2 sup> / g,骨架密度为5.18。 ±0.03 g / cm 3 sup>。提出了一种解释聚集体尺寸与微波功率之间相关性的机理模型。首次提出了控制ZnO NPs聚集体平均尺寸的方法,在文献中未发现类似的研究。
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