Hydrothermal synthesis of assembled sphere-like WO3 architectures and their gas-sensing properties
作者： Hejing Zhang , Tianmo Liu , Long Huang , Weiwei Guo , Dejun Liu
DOI: 10.1016/J.PHYSE.2012.03.013
关键词: Monoclinic crystal system 、 Nanotechnology 、 Hydrothermal synthesis 、 Materials science 、 Chemical engineering 、 Hydrothermal circulation 、 Porosity 、 Malic acid 、 Hexagonal crystal system
摘要: Abstract Unique assembled sphere-like WO 3 architectures were successfully synthesized through a facile hydrothermal method in the presence of malic acid followed by subsequent heat treatment. We found that played significant role governing morphologies · x H 2 O precursors during process. A possible formation mechanism was also proposed detail. Experimental results showed optimized precursor could be dehydrated to mixed composition hexagonal and monoclinic with unique porous architecture after being annealed at 400 °C for 2.5 h. Besides, gas-sensing measurement indicated well-defined 3D exhibited highest sensor response ethanol optimal temperature 250 °C among samples.
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