STRUCTURAL APPROACH AND CONDUCTIVITY OF LAMELLAR HYDROXIDES ZN2CR(OH)6-ANION-NH2O BY XANES, EXAFS AND X-RAY-DIFFRACTION
STRUCTURAL APPROACH AND CONDUCTIVITY OF LAMELLAR HYDROXIDES ZN2CR(OH)6-ANION-NH2O BY XANES, EXAFS AND X-RAY-DIFFRACTION
复制标题
DOI：
10.1016/0025-5408(85)90209-0
复制
发表时间：
1985-01-01
影响因子：
5.4
通讯作者：
BONDOT, P
中科院分区：
文献类型：
--
作者：
DEROY, A;BESSE, JP;BONDOT, P
粉末衍射图为片层状、结构不良的锌铬(OH)6X.nH2O(X=负离子)。用XANES和EXAFS分析了铬、锌和溴的K边谱，探讨了其结构途径。X-射线吸收分析结果表明，铬、锌以八面体配位，X-离子离域。在293K下，我们测量了在3.10−3到2.10−6Ω−1.cm−1范围内的电导。这些材料可以得到强取向的厚层，这一事实表明这些材料可能在微离子技术中应用，特别是在氢传感器的开发中。
Powder diffractograms of Zn2Cr(OH)6X.nH2O (X = anion) are characteristic of lamellar and ill-organized materials. A structural approach has been investigated using XANES and EXAFS analysis of the K edge spectra of Cr, Zn and Br. Results of X-ray absorption analysis indicates an octahedral coordination for Cr and Zn and a delocalisation of X anion. At 293 K we measured conductivities in the range 3.10−3to 2.10−6Ω−1. cm−1. The fact that these materials can be obtained as strongly oriented thick layers suggests possible applications in microionic technology, particularly in the development of hydrogen sensors.