采用直接沉淀法制备ZnO,用乙醇做溶剂,在TiO2纳米管中沉积ZnO
a one-step pyrolysis approach. Specifically,a designated amount (0.92 g, 1.84 g, 2.76 g, and 3.68 g) of Zn(NO3)2 was added to 20 mL of ethanol aqueous solution (i.e., 8 mL of ethanol plus 12 mL of ddH2O), and pH was controlled to be ∼ 8. Then TNTs were immersed in the above mixed solutions for 4 h. Subsequently, the
pretreated samples were annealed at 400 °C for 2 h in air with heating rate of 2 °C/min to transform absorbed precursor to ZnO phase, leading to ZnO/TNTs heterostructures with varied weight loading percentage of 5%, 10%, 15%, and 20%, respectively. It should be emphasized that loading percentage herein is def ined as weight ratio of Zn(NO3)2 to weight for mixed ethanol aqueous solution.
可是电镜图中,表面总是覆盖有一层,怎样才能使溶液中的沉淀更分散,或者ZnO粒径更小?
请学友们帮忙给一些好的建议,万分感谢!
ACS Appl. Mater. Interfaces 2012, 4, 7055−7063
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