Synthesis and gas-sensing properties of WO3 nanorods/graphene composites
GUI Yang-hai
KONG Hua-jie
LIU Bei-bei
FU Ke-rui
WANG Huai-shun
YUAN Chao-sheng
Abstract：Using sodium tungstate and hydrochloric acid as raw materials,oxalic acid and sodium sulfate as auxiliary agents,WO3 nanorods/graphene composites had been synthesized by hydrothermal method.The as-synthesized samples were characterized by XRD,FE-SEM,RAMAN and FTIR.Gas-sensing character-istics of the materials had been tested by static state method.The results illustrated that the as-synthesized pure WO3 had monoclinic phase and the WO3 /graphenenanomaterial had tetragonal phase.The length-di-ameter ratio of the materials increased when the amounts of graphene oxide (GO)increased,and the 1.0 wt% WO3 /graphenenanocomposite had a good gas-sensing property.Its sensitivity could reach 1.779 of 5 ×10 -6 H2 at 2.96 V working voltage(about 155 ℃).And this time,the response and recovery time was 3 s and 4 s,respectively.
Keywords：WO3 nanorods/graphene compositehydrothermalgas-sensing performance
Publication Date：2015-10-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 7-11 )