Template-Free Synthesis of Tin Oxides with a Dual Pore Structure

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• 作者：Eun-Ji Kim^a ; Meilin Liu^b ; Heon-Cheol Shin^a ; ^{hcshin@pusan.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Anodic oxidation ; Sn oxide ; Dual pore structure ; Stress
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：10 May 2016
• 年：2016
• 卷：200
• 期：Complete
• 页码：90-96
• 全文大小：4557 K

文摘

In this study, we report electrochemical synthesis of Sn oxides with dual-pore structure by employing anodic oxidation without the use of a porous template. As-prepared Sn oxide layers contain hemispherical micropores of less than 2 μm diameters and nanopores of less than 50 nm diameters. The formation and size of the micropores strongly depended on the thickness of the Sn layer and the type of the underlying substrate. A two-step anodic oxidation process produced a completely open pore structure, resulting in robust interconnections between the micropores and nanopores. The tensile stresses originating from the anodized Sn oxide and the associated local distortion of the Sn metal underneath it are the likely driving forces for the formation of micropores.