Here we report a very simple method to convert conventional CuO powders to nanoparticle interlinked microsphere cages by solution method. CuO is dissolved into aqueous ammonia, and the solution is diluted by alcohol and dip coating onto a glass substrate. Drying at 80 °C, the nanostructures with bunchy nanoparticles of Cu(OH)₂can be formed. After the substrate immerges into the solution and we vaporize the solution, hollow microspheres can be formed onto the substrate. There are three phases in the as-prepared samples, monoclinic tenorite CuO, orthorhombic Cu(OH)₂, and monoclinic carbonatodiamminecopper(II) (Cu(NH₃)₂CO₃). After annealing at 150 °C, the products convert to CuO completely. At annealing temperature above 350 °C, the hollow microspheres became nanoparticle interlinked cages.
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机译：在这里，我们报告了一种非常简单的方法，可以通过溶液法将常规的CuO粉末转化为纳米颗粒互连的微球笼。将CuO溶解在氨水中，并用乙醇稀释该溶液并将其浸涂在玻璃基板上。在80℃下干燥，可以形成具有Cu（OH）2束状纳米颗粒的纳米结构。在基材浸入溶液中并蒸发溶液后，可以在基材上形成空心微球。所制备的样品中存在三个相，即单斜锰红铜矿CuO，斜方晶Cu（OH）2和单斜碳酸二铵铜（II）（Cu（NH 3）2 CO 3）。在150°C退火后，产物完全转化为CuO。在高于350°C的退火温度下，中空微球变成了纳米颗粒互连的笼子。
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