Preparation of Zirconium Oxide Powder Using Zirconium Carboxylate Precursors

Abstract

Zirconia was prepared at low temperatures (<450 ∘ C) using single several source precursors based on zirconium carboxylates where the R groups were systematically varied. The combination of density functional theory (DFT) calculations and extensive characterization of the precursors (i.e., X-ray diffraction, thermal gravimetric analysis, infrared spectroscopy, and scanning electron microscopy) indicated that the carboxylic acid complexes may link the zirconium metal with a cis bidentate configuration. Periodic DFT calculations were performed to examine the interaction between monoclinic ZrO 2 and propanoic acid. Dissociative adsorption takes place through the cis bidentate structure with an adsorption energy of −1.43 eV. Calculated vibrational frequencies using the optimized structure are in good agreement with experimental findings.

Reusable Nano-Zirconia-Catalyzed Synthesis of Benzimidazoles and Their Antibacterial and Antifungal Activities

“…The band at 1386 cm −1 is ascribed to the absorption of non-bridging O-H groups. The sharp bands at 504 cm −1 and 734 cm −1 are attributed to the vibration modes of the ZrO3 2− , and ZrO 2 groups, which strongly confirm the formation of nano-ZrO 2 , as shown in Figure 2 b [ 34 ].…”

Silicon and Zirconium Ceramics Radiolysis in the Presence of Water

“…Previous research regarding H 2 production under ionizing radiation focused mainly on oxides and hydroxides, with very few reports on the impact of carbides and nitrides on H 2 production . At the same time, ceramics have been proposed to replace the zirconium alloys commonly used as cladding materials in pressurized water reactors to make them more accident tolerant. − In an accident scenario, the ceramics would be exposed to high temperatures, water, and large radiation fields. Studies of the irradiation effects on ceramics have mainly focused on structural consequences rather than surface effects, − although the surface chemistry has more immediate effects in an accident scenario.…”

Synthesis and Characterization of Stabilized Tetragonal Nano Zirconia by Precipitation Method

“…Many reports on ZrO2 preparation show that, nanocrystalline ZrO2 powders have been prepared by quite a few methods, including sol-gel process, Pechini-type sol-gel process, hydrothermal method, two-phase process, microwave irradiation, thermal decomposition and forced hydrolysis [10][11][12][13]. On the other hand, ZrO2 nanoparticles prepared by the previous mentioned methods are basically pure inorganic nanopowder and can not be dissolved in organic solvents because of prone reunion and high surface energy, thus greatly limiting their use [14,15].…”