Designed Synthesis of In2O3 Beads@TiO2鈥揑n2O3 Composite Nanofibers for High Performance NO2 Sensor at Room Temperature

详细信息    查看全文

• 作者：Linlin Wang ; Jun Gao ; Baofeng Wu ; Kan Kan ; Shuang Xu ; Yu Xie ; Li Li ; Keying Shi
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 16, 2015
• 年：2015
• 卷：7
• 期：49
• 页码：27152-27159
• 全文大小：522K
• ISSN：1944-8252

文摘

Porous single crystal In₂O₃ beads@TiO₂鈥揑n₂O₃ composite nanofibers (TINFs) have been prepared via a facile electrospinning method. The beads were formed because of the existence of hemimicelles in pecursor solution. The formation of hemimicelles was attributed to the synergy of tetrabutyl titanate (TBT) and polyvinylpyrrolidone (PVP). Abundant In³⁺ ions were drawn toward the ketonic oxygen of PVP resulting in In³⁺ ions aggregation. Compared with pristine In₂O₃ nanofibers (INFs), the as-prepared TINFs exhibited excellent properties for sensing NO₂ gas at room temperature (25 掳C). The enhanced sensing property was due to much absorbed oxygen and Schottky junctions between the porous single crystal In₂O₃ beads and the Au electrode of the sensor. The strategy for combining the unique In₂O₃ beads@TiO₂鈥揑n₂O₃ nanofibers structure which possessed superior conductivity and sufficient electrons with the addition of TiO₂ offered an innovation to enhance the gas sensing performance.