Facile Synthesis of Cu2GeS3 and Cu2MGeS4 (M = Zn, Mn, Fe, Co, and Ni) Hollow Nanoparticles, Based on the Nanoscale Kirkendall Effect

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• 作者：Chunwei Dong ; Dong Yao ; Jianyou Feng ; Tingting Huang ; Xiyu Hu ; Zhennan Wu ; Yi LiuBai Yang ; Hao Zhang
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：December 27, 2016
• 年：2016
• 卷：28
• 期：24
• 页码：9139-9149
• 全文大小：781K
• ISSN：1520-5002

文摘

Hollow nanostructures have shown charming properties beyond their solid counterparts, but the synthesis of multinary chalcogenide semiconductors with hollow nanostructures remains challenging, because of their complex components. In this work, we demonstrate a facile one-pot method to synthesize Cu₂GeS₃ hollow nanoparticles (NPs) based on Kirkendall effect by using dissolved GeO₂ as the Ge source. A theory model according to the diffusion kinetic and reaction kinetic is established to investigate the growth mechanism of Cu₂GeS₃ hollow NPs. By using Cu₂GeS₃ hollow NPs as the template, quaternary Cu₂MGeS₄ (M = Zn, Ni, Co, Fe and Mn) hollow NPs are further produced, which are more difficult to prepare, because of their excessive ion species. Furthermore, Cu₂GeS₃ hollow NP-based gas sensors are prepared, which exhibit outstanding sensitivity for the detection of ethanol gas, because of their large surface-to-volume ratio and small grain size.