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Citation: LUO Geng-Geng, LIN Shen, YANG Liu-Yi, CHEN Jie-Bo, ZHANG Yan-Qiong. Preparation,Characterization and Catalytic Activity of Polyoxometalate Nanometer Powders Obtained at Room Temperature by Solid State Reaction[J]. Chinese Journal of Applied Chemistry, ;2006, 23(6): 591-596. shu

Preparation,Characterization and Catalytic Activity of Polyoxometalate Nanometer Powders Obtained at Room Temperature by Solid State Reaction

1.
College of Chemistry and Material Science, Fujian Normal University, Fuzhou 350007

Corresponding author: LIN Shen,
Received Date: 19 September 2005
Available Online: 8 December 2005
Fund Project: 国家教育部科技计划项目(205078) (205078)福建省教育厅A类重点项目(JA04167) (JA04167)

(NH₄)₄[PMo₁₁VO₄₀]·4H₂O nanometer powders were prepared by solid state reaction between H₄PMo₁₁VO₄₀·13H₂O and(NH₄)₂C₂O₄·H₂O at room temperature and characterized by elemental analysis,FTIR,XRD,TEM,TG-DTA and BET techniques.The experimental results indicate that the nanometer powders remain Keggin structure and have a mean grain size of 25 nm and BET specific surface area of 157.82 m²/g.The heteropolyanion shows good thermal stability up to 390℃.Using so-obtained nanomaterial as catalyst for the dehydration of cyclohexanol,the yield of cyclohexene could reach 77.98%,which is higher than those of currently widely used catalyst as well as its bulk counterpart.The yield was achived under optimized catalytic reaction conditions with the mass ratio (catalyst/cyclohexanol) of 8.31%,0.5 h reaction duration and 160℃ reaction temperature.
- polyoxometalates,
- nanometer powders,
- solid state reaction,
- catalytic activity
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