Nanosheet-Assembled ZnFe2O4 Hollow Microspheres for High-Sensitive Acetone Sensor

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• 作者：Xin Zhou ; Xiaowei Li ; Hongbin Sun ; Peng Sun ; Xishuang Liang ; Fengmin Liu ; Xiaolong Hu ; Geyu Lu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 22, 2015
• 年：2015
• 卷：7
• 期：28
• 页码：15414-15421
• 全文大小：522K
• ISSN：1944-8252

文摘

Semiconductor oxides with hierarchically hollow architecture can provide significant advantages as sensing materials for gas sensors by facilitating the diffusion of target gases. Herein, we develop a facile template-free solvothermal strategy combined with the subsequent thermal treatment process toward the successful synthesis of novel ZnFe₂O₄ hollow flower-like microspheres. The images of electron microscopy unambiguously indicated that the ZnFe₂O₄ nanosheets with thickness of around 20 nm assembled hierarchically to form the unique flower-like architecture. As a proof-of-concept demonstration of the function, the as-prepared product was utilized as sensing material for gas sensor. Significantly, in virtue of the porous shell structure, hollow interior, and large surface area, ZnFe₂O₄ hierarchical microspheres exhibited high response, excellent cyclability, and long-term stability to acetone at the operating temperature of 215 掳C.