One-Step Hydrothermal Synthesis of High-Performance Gas-Sensing Crystals CdIn2O4 with Octahedral Shape

详细信息    查看全文

• 作者：Yanli Liu ; Chao Kong ; Xujie L眉 ; Fuhui Liao ; Fuqiang Huang ; Jianhua Lin
• 刊名：Crystal Growth & Design
• 出版年：2012
• 出版时间：August 1, 2012
• 年：2012
• 卷：12
• 期：8
• 页码：4104-4108
• 全文大小：381K
• 年卷期：v.12,no.8(August 1, 2012)
• ISSN：1528-7505

文摘

Octahedrally shaped CdIn₂O₄ was synthesized in a one-step hydrothermal reaction without any surfactant. These octahedral particles used as an ethanol sensor revealed excellent gas response, which is comparable to the well-known SnO₂-based gas sensors. The octahedral CdIn₂O₄ powder possesses the active {111} facets, which contribute to the higher gas-sensing performance of octahedral CdIn₂O₄ than that of the nanosized CdIn₂O₄ powder obtained by coprecipitation method. The XPS results demonstrated that the CdIn₂O₄ octahedra enclosed by {111} facets provided more oxygen vacancies, resulting in the enhanced performance. The calculation also showed higher surface energies for the {111} orientation, which confirms the mechanism of the enhanced gas-sensing performance of the octahedral particles. The as-formed crystals with controlled morphology provide insights for the designed strategy of high-performance gas-sensing materials, and this synthetic route provides flexibility and selectivity for the deliberate preparation of other functional materials.