Studies on Conductivity of Hydrotalcite [CdxMg6-xAl2 (OH)16]2+[S·2H2O]2- Doped with Cu2+ Ion

Abstract

Abstract: Hydrotalcite [Cd_xMg_6-xAl₂(OH)₁₆]²⁺[S·2H₂O]^2-doped with Cu²⁺ ion wassynthesized hydrothermally and the influence of the Cu²⁺ and Cd²⁺ ionic content, sulphurationtime and calcination temperature on the conductivity was studied.The results show that theconductivity increases with the increases of Cu²⁺ and Cd²⁺ content and sulphuration time inthe given ranges, and decreases beyond the ranges.The activation energies calculated withequation σ=σ₀exp (-E_a/RT) in the ranges of temperatures from 323 Kto 363 Kand from383 Kto 523 Kare 76.55 kJ/mol and 7.18 kJ/mol, respectively.It is a good protonicconductor in the latter temperature range.

Key words: Hydrotalcite, Conductivity, Doping

CLC Number:

O641.4

TrendMD:

BAO Yu-Min, FU Ge-Yan, MA Shu-Jie, LI Lian-Sheng, FENG Shou-Hua, XU Ru-Ren. Studies on Conductivity of Hydrotalcite [Cd_xMg_6-xAl₂ (OH)₁₆]^²⁺[S·2H₂O]^2- Doped with Cu^²⁺ Ion[J]. Chem. J. Chinese Universities, 1997, 18(11): 1746.

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Studies on Conductivity of Hydrotalcite [Cd_xMg_6-xAl₂ (OH)₁₆]^²⁺[S·2H₂O]^2- Doped with Cu^²⁺ Ion

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