Synthesis, Structure and Thermal Analysis of Zn(II)-Bi(III) Hetrometallic Complex with Ethylenediaminetetraacetate

Abstract

A hetrobimentallic complex of Zn[Bi(edta)]2•8H2O was synthesized under hydrothermal condition and characterized by means of X-ray single crystal diffraction, element analysis, FT-IR spectra and thermal analysis. The complex is monoclinic, space group C2/c with a =2.3532(8) nm, b=0.8675(3) nm, c=1.6116(6) nm, β=98.114(6) °, V=3.2569(19) nm3, Z=4，Dc= 2.455 g•cm－3，μ= 11.615mm－1. Bridging edta4－ anions between Bi(III) atoms result into infinite 1D zigzag chain. [Bi(edta)]－anions and [Zn(H2O)6]2+ cations are bonded through hydrogen bonds to form network structure. The thermal decomposition of the complex proceeds dehydration, pyrolysis of ligand, and decomposition of salt, and the final residue is inorganic oxide. The thermodynamic parameters ( ΔH、ΔG and ΔS) and kinetic parameters (activation energy Ea and the pre-exponential factor A) for the pyrolysis of ligand have been calculated.

Application of Bi12ZnO20 Sillenite as an Efficient Photocatalyst for Wastewater Treatment: Removal of Both Organic and Inorganic Compounds

“…Bismuth-based semiconductors have attracted considerable research interest because bismuth ions are favorite materials for catalysts [ 27 ]. Furthermore, as bismuth has toxic ions when they are free, synthesizing a stable useful material can help to reduce their risk in the environment [ 28 ]. Within the bismuth semiconductor category, sillenite forms of Bi 12 [M]O 20 have attracted many scientists because of their unique crystal structures, interesting photochromic qualities, peculiar electronics, and dielectric photorefractive properties, promising optical activity [ 29 , 30 , 31 ].…”