Formation of solid solutions and composites in the system ZnO-ZrO2
O.I. Gyrdasova, L.A. Pasechnik
Institute of Solid State Chemistry of the Ural Branch of RAS
DOI: 10.26456/pcascnn/2025.17.627
Original article
Abstract: It is proposed to obtain solid solutions and composites based on zinc and zirconium oxide systems as promising photoactive materials. The synthesis method involves the use of a precursor technology. Partially zinc-substituted zirconyl formates were previously obtained as precursors. It is shown that thermolysis of precursors in air at 700°C stabilizes Zn1-xZrxO1+2x solid solutions with a wurtzite structure in the range 0≤x≤0,06. Increasing the zirconium concentration leads to the formation of hybrid materials of the core/shell type Zn1-xZrxO1+2x/Zr1-xZnxO2-x, consisting of solid solutions of two types. For Zn1-xZrxO1+2x (0≤x≤0,8), the wurtzite structure is retained. In the Zr1-xZnxO2-x system, a composite based on the tetragonal phase t-ZrO2 is stabilized. In the homogeneity region of Zr1-xZnxO2-x at 0,1≤x≤0,3, single-phase solid solutions also have a tetragonal modification t-ZrO2. Zirconium doping of ZnO promotes accumulation of negative charge on the surface of oxide material particles, which is associated with adsorption of hydroxide ions from alkaline solutions. When doping ZrO2 by zinc, a general tendency to stabilization of the surface charge in Zr1-xZnxO2-x solid solutions is observed. In this case, a shift in the ζ-potential values of dispersions to the region of positive values is observed when moving from solid solutions to hybrid materials t-Zr1-xZnxO2-x/Zn1-xZrxO1+2x, which will promote sedimentation of objects when extracting them from the photoreactor zone.
Keywords: zirconium oxide, zinc oxide, nanoheterostructures, synthesis, precursors, microstructure, zeta potential
- Olga I. Gyrdasova – Ph. D., Leading Researcher, Laboratory of Inorganic Synthesis, Institute of Solid State Chemistry of the Ural Branch of RAS
- Liliya A. Pasechnik – Ph. D., Leading Researcher, Laboratory of Heterogeneous Processes, Institute of Solid State Chemistry of the Ural Branch of RAS
For citation:
Gyrdasova O.I., Pasechnik L.A. Formirovanie tverdykh rastvorov i kompozitov v sisteme ZnO-ZrO2 [Formation of solid solutions and composites in the system ZnO-ZrO2], Fiziko-khimicheskie aspekty izucheniya klasterov, nanostruktur i nanomaterialov [Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials], 2025, issue 17, pp. 627-635. DOI: 10.26456/pcascnn/2025.17.627. ⎘
Full article (in Russian): download PDF file
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