As a new member of metal oxide family, two-dimensional (2D) amorphous metal oxide nanosheets have attracted considerable research interest in various fields, because of their unique surface electronic structure. However, some 2D amorphous metal oxide nanosheets produced by strong acid weak alkali salts (such as FeCl₃, ZrCl₄, CrCl₃, SnCl₄, and AlCl₃) are difficult to synthesize, because of their tendency to precipitate and aggregate under facile conditions. Thus, developing a common route to prepare these 2D amorphous metal oxide nanosheets is urgently needed. Herein, we report a universal method to synthesize a series of 2D amorphous metal oxide, including Fe₂O₃, Cr₂O₃, ZrO₂, SnO₂, and Al₂O₃. In this method, lamellar oleate is introduced as a host matrice to restrict the ion exchange reaction that occurs between Cu₂O and metal ions. By controlling calcination temperature to remove the oleate, the corresponding 2D amorphous metal oxide ultrathin nanosheets are successfully obtained. This facial method may open a new avenue to fabricate promising 2D amorphous metal oxide nanosheets for practical applications.

中文翻译：

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超薄非晶态金属氧化物纳米片的密闭合成

作为金属氧化物家族的新成员，二维（2D）非晶态金属氧化物纳米片由于其独特的表面电子结构而吸引了各个领域的大量研究兴趣。然而，由于强酸弱碱金属盐（如FeCl ₃，ZrCl ₄，CrCl ₃，SnCl ₄和AlCl ₃）制得的某些二维非晶态金属氧化物纳米片，由于它们在易变条件下易于沉淀和聚集，因此难以合成。 。因此，迫切需要开发制备这些2D非晶态金属氧化物纳米片的通用途径。本文中，我们报告了一种通用方法来合成一系列2D非晶态金属氧化物，包括Fe ₂ O ₃，Cr ₂ O ₃，ZrO ₂，SnO ₂和Al ₂ O ₃。在该方法中，引入层状油酸酯作为基质，以限制Cu ₂ O和金属离子之间发生的离子交换反应。通过控制煅烧温度以去除油酸酯，可以成功获得相应的二维无定形金属氧化物超薄纳米片。这种面部方法可能会开辟一条新途径，以制造出有希望的2D非晶态金属氧化物纳米片用于实际应用。