摘要
SnO nanosheets and SnO_2 nanopowder were prepared by hydrazine (N_2H_4)-based chemical routes and their gas sensing characteristics were investigated.A SnCl_2-Hydrazine complex (Sn[ N_2H_4)_x]·yH_2O) was formed by a reaction between a SnCl_2 aqueous solution and N_2H_4·H_2O.When this complex was heat-treated at 450℃,SnO_2 nanopowders were prepared by the decomposition of the complex.The sensor fabricated from the SnO_2 nano powders showed a good recovery,fast response and high sensitivity for CO 50μg/g (R_a/R_g=1.87),C_2H_5OH 100μg/g (R_a/R_g=4.80),and acetone 100μg/g (R_a/R_g=1.50).SnO nano- sheets could be prepared when a NaOH solution was added to the solution containing the complex.SnO_2 nano sheets prepared by the oxidation of SnO nanosheets at 700℃in air atmosphere also showed a good sensitivity R_a/R_g=1.79) for CO 50μg/g at 400℃.The hydrazine method provided an effective tool to controlling the morphology and oxidation state of the tin oxide powders.
SnO nanosheets and SnO2 nanopowder were prepared by hydrazine（N2H4）-based chemical routes and their gas sensing characteristics were investigated. A SnCl2-Hydrazine complex （Sn[CN2H4）x]·yH2O） was formed by a reaction between a SnCl2 aqueous solution and N2H4·H2O. When this complex was heat-treated at 450℃, SnO2 nanopowders were prepared by the decomposition of the complex. The sensor fabricated from the SnO2 nano powders showed a good recovery, fast response and high sensitivity for CO 50 μg/g （Ra/Rg=1.87）, C2H5OH 100 μg/g （RaRg=4.80）, and acetone 100μg/g （RdRs=1.50）. SnO nanosheets could be prepared when a NaOH solution was added to the solution containing the complex. SnO2 nano sheets prepared by the oxidation of SnO nanosheets at 700℃ in air atmosphere also showed a good sensitivity （Ra/Rg=1.79） for CO 50 μg/g at 400℃. The hydrazine method provided an effective tool to controlling the morphology and oxidation state of the tin oxide powders.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2006年第A03期43-46,共4页
Rare Metal Materials and Engineering
