化学学报 ›› 2011, Vol. 69 ›› Issue (14): 1667-1672. 上一篇    下一篇

研究论文

六方纳米氧化铟的制备及其气敏性质和表面酸碱性质研究

范迎菊,李加智,孙中溪*   

  1. (济南大学化学化工学院 山东省氟化学化工材料重点实验室 济南 250022)
  • 投稿日期:2010-11-19 修回日期:2011-03-01 发布日期:2011-03-28
  • 通讯作者: 孙中溪 E-mail:sunzx@ujn.edu.cn
  • 基金资助:

    超细粒铜、铅、锌金属氧化矿物表面硫化络合研究;氧化硅、氧化铝、氧化铁纳米微界面复合体系的表面络合化学研究

Preparation, Gas-Sensing and Acid-Base Properties of Hexagonal In2O3 Nano-Particles

FAN Ying-Ju, LI Jia-Zhi, SUN Zhong-Xi   

  1. (Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022)
  • Received:2010-11-19 Revised:2011-03-01 Published:2011-03-28
  • Contact: Zhong-Xi SUN E-mail:sunzx@ujn.edu.cn

以十二胺和油酸为结构导向剂, 利用溶剂热法制备了星状六方结构纳米In2O3. 用透射电镜、扫描电镜、X射线衍射、红外光谱、热重-差热对产物进行了表面形貌和结构的表征. 气敏测试结果表明, In2O3在300 ℃对乙醇气体具有快速敏感的传感性能和良好的选择性. 采用自动电位滴定技术研究了纳米氧化铟的表面酸碱性质, 测定了氧化铟表面羟基浓度. 在pH=5~7.3范围, In2O3表面优势组分为≡InOH.

关键词: 半导体, 氧化铟, 气体传感器, 表面羟基位, 酸碱性质

Hexagonal In2O3 nanostructures with star-like morphology were synthesized using dodetyl amine (DDA) and oleic acid as template through a surfactant-assisted solvothermal process, characterized by TEM, SEM, XRD, IR, and TG/DTA. Testing results indicate that In2O3 shows an excellent response and selectivity to ethanol vapor at 300 ℃. The acid-base properties of In2O3 were studied by potentiometric titration technique. The concentration of surface hydroxyl was calculated. Within the range of pH=5~7.3, the preponderant surface component of In2O3 was ≡InOH.

Key words: semiconductor material, indium oxide, gas sensors, surface hydroxyl site, acid-base properties