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首页> 外文期刊>Crystal growth & design >A Fast and Template Free Synthesis of Tb:Y2O3 Hollow Microspheres Via Supercritical Solvothermal Method
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A Fast and Template Free Synthesis of Tb:Y2O3 Hollow Microspheres Via Supercritical Solvothermal Method

机译：超临界溶剂热法快速无模板合成Tb：Y2O3空心微球

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The design of template-free hollow microspheres in a very short period of time will be of great importance to save energy and time and allow rapid production. We succeeded in the rapid synthesis of precursor material via a supercritical solvothermal method followed by subsequent heating to obtain Tb:Y2O3 hollow microspheres. The prepared precursor material was actually composed of Y(OH)(3) and Y(OH)CO3 phases. The hollow microspheres seemed to be formed through the aggregation of nanoparticles under supercritical conditions. The formation mechanism of hollow microspheres in the present synthesis is the Ostwald ripening process. Effects of reaction temperature and pH of the starting solution were investigated to understand the effect on the formation of hollow microspheres. Well-shaped Tb:Y2O3 hollow microspheres showed strong green emission at 540 nm under 304 nm light excitation. The effect of doping concentrations and calcinations temperature was investigated.
机译：在非常短的时间内设计无模板的空心微球对于节省能源和时间并实现快速生产非常重要。我们通过超临界溶剂热法成功地快速合成了前体材料，随后进行了加热以获得Tb：Y2O3中空微球。制备的前体材料实际上由Y（OH）（3）和Y（OH）CO3相组成。空心微球似乎是在超临界条件下通过纳米颗粒的聚集形成的。本合成中空心微球的形成机理是奥斯特瓦尔德熟化过程。研究反应温度和起始溶液的pH值的影响，以了解其对中空微球形成的影响。形状良好的Tb：Y2O3中空微球在304 nm的光激发下在540 nm处显示强绿色发射。研究了掺杂浓度和煅烧温度的影响。

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