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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 6    December 2009

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Electrochemical synthesis and characterization of tantalum alkoxides
YANG Sheng-hai(杨声海)1, CAI Ya-nan(蔡亚楠)2, YANG Hai-ping(杨海平)1, JIN Sheng-ming(金胜明)2

1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:Tantalum(Ⅴ) propoxide (Ta(OPrn)5), isopropoxide (Ta(OPri)5) and butoxide(Ta(OBun)5) were synthesized by electro- chemical reactions of corresponding alcohol at sacrificial tantalum anode in the presence of tetraethylammonium chloride as a conductive additive. The pure products were isolated by reduced pressure distillation under 5 kPa. The crystal of Ta(OPri)5 was obtained by recrystallization from hexane at −10 ℃. These samples were characterized by Fourier transform infrared spectra (FT-IR), Raman spectra, nuclear magnetic resonance spectra (NMR), TG/DTA and ICP-MS. The results show that direct electrochemical synthesis of metal alkoxides has a high current efficiency and electrolysis yield. These alkoxides have a high purity of 99.97% and can be directly used as the precursor of Ta2O5 films.

 

Key words: electrochemical synthesis; tantalum alkoxides; spectral characterization; thermal analysis

ISSN 1672-7029
CN 43-1423/U

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