This article presents the method of size control of cobalt-doped zinc oxide nanoparticles (Zn 1?x Co x O NPs) obtained by means of the microwave solvothermal synthesis. Zinc acetate dihydrate and cobalt(II) acetate tetrahydrate dissolved in ethylene glycol were used as the precursor. It has been proved by the example of Zn 0.9 Co 0.1 O NPs (x = 10 mol %) that by controlling the water quantity in the precursor it is possible to precisely control the size of the obtained Zn 1?x Co x O NPs. The following properties of the obtained Zn 0.9 Co 0.1 O NPs were tested: skeleton density (helium pycnometry), specific surface area (BET), dopant content (ICP-OES), morphology (SEM), phase purity (XRD), lattice parameter (Rietveld method), average crystallite size (FW1/5/4/5M method and Scherrer’s formula), crystallite size distribution (FW1/5/4/5M method), and average particle size (from TEM and SSA). An increase in the water content in the precursor between 1.5% and 5% resulted in the increase in Zn 0.9 Co 0.1 O NPs size between 28 nm and 53 nm. The X-ray diffraction revealed the presence of only one hexagonal phase of ZnO in all samples. Scanning electron microscope images indicated an impact of the increase in water content in the precursor on the change of size and shape of the obtained Zn 0.9 Co 0.1 O NPs. The developed method of NPs size control in the microwave solvothermal synthesis was used for the first time for controlling the size of Zn 1?x Co x O NPs.
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机译：本文介绍了通过微波溶剂热合成获得的钴掺杂的氧化锌纳米颗粒（Zn 1？x Co x O NPs）的尺寸控制方法。将溶解在乙二醇中的乙酸锌二水合物和乙酸钴（II）四水合物用作前体。通过Zn 0.9 Co 0.1 O NPs（x ＝ 10mol％）的实例证明，通过控制前体中的水量，可以精确地控制所获得的Zn1ΔxCo x O NPs的尺寸。测试了获得的Zn 0.9 Co 0.1 O NP的以下特性：骨架密度（氦比重法），比表面积（BET），掺杂剂含量（ICP-OES），形态（SEM），相纯度（XRD），晶格参数（Rietveld方法），平均晶粒尺寸（FW1 / 5/4 / 5M方法和Scherrer公式），晶粒尺寸分布（FW1 / 5/4/5 / 5M方法）和平均粒径（来自TEM和SSA）。前体中水含量增加1.5％至5％，导致Zn 0.9 Co 0.1 O NPs尺寸增加28 nm至53 nm。 X射线衍射显示在所有样品中仅存在一个六方相的ZnO。扫描电子显微镜图像表明前体中水含量的增加对所获得的Zn 0.9 Co 0.1 O NPs的尺寸和形状变化的影响。首次采用微波溶剂热合成中开发的NPs尺寸控制方法来控制Zn 1？x Co x O NPs的尺寸。
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