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Mixed oxide

About: Mixed oxide is a research topic. Over the lifetime, 5224 publications have been published within this topic receiving 115567 citations.


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Journal ArticleDOI
TL;DR: In this paper, the synthesis of mesostructured silica−titania mixed metal oxide thin films serving two different functions: (a) structure-directing agent and (b) a moderator of the hydrolysis rate of the titanium alkoxide.
Abstract: Poly(ethylene glycol) containing surfactant molecules were modified with titanium alkoxides. These surfactants were used in the synthesis of mesostructured silica−titania mixed metal oxide thin films serving two different functions: (a) as a structure-directing agent and (b) as a moderator of the hydrolysis rate of the titanium alkoxide. The resulting amorphous material showed a well-ordered hexagonal mesostructure with titanium species present in a tetrahedral environment. Upon heat treatment above 500 °C, the amorphous structure converted into anatase and finally rutile.

57 citations

Journal ArticleDOI
TL;DR: In this article, the redox behavior of a Ce0.68Zr0.32O2 mixed oxide is reversibly modified by alternating high temperature (1223 K) reduction with either mild or high temperature re-oxidation treatments.

57 citations

Journal ArticleDOI
TL;DR: In this article, a depth profiling of RuO{sub 2}/TiOsub 2 mixed oxide coatings supported on titanium foil was performed by means of Rutherford backscattering spectrometry and x-ray photoelectron spectroscopy.
Abstract: Depth profiling of RuO{sub 2}/TiO{sub 2} mixed oxide coatings supported on titanium foil, was performed by means of Rutherford backscattering spectrometry and x-ray photoelectron spectroscopy. Results of the two techniques indicate the occurrence of surface segregation of the valve-metal oxide and a general enrichment with it across the first 100-150 nm. The segregation phenomenon takes place for all of the coating compositions investigated. However, it seems less pronounced for Ru contents higher than 60/ac. The nature of the ruthenium salt used in the coating preparation seems to affect the extent of the surface enrichment.

57 citations

Journal ArticleDOI
TL;DR: In this article, a micro-arc oxidation (MAO) coating was prepared on the AZ31 magnesium alloy in advance, and on the basis of the MAO coating, the graphene oxide (GO)/MgAl-layered double hydroxide composite was prepared by hydrothermal chemical transformation in pure GO solution.
Abstract: The preparation of excellent anti-corrosion coatings is necessary for practical large-scale applications. In this study, a micro-arc oxidation (MAO) coating was prepared on the AZ31 magnesium alloy in advance. Then, on the basis of the MAO coating, the graphene oxide (GO)/MgAl-layered double hydroxide (MgAl-LDH) composite was prepared by hydrothermal chemical transformation in pure GO solution with the mixed oxide of aluminum and magnesium in the MAO coating as the endogenous cation, without introducing any kind of salts. The chemical states, structural composition and morphology of the GO/LDH-MAO coating were confirmed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The potentiodynamic polarization revealed that 0.1 GO/LDH-MAO coating (3.89 × 10−9 A/cm2) is more resistant to corrosion than MAO coating (9.89 × 10−6 A/cm2) in 3.5 wt% NaCl solution. The organic combination of Mg Al LDH and GO can obviously enhance the corrosion protection ability of the coating. This research explored in detail the possible corrosion protection mechanisms regarding GO/LDH-MAO coatings, which supplied the feasibility for enhancing the anti-corrosion performance of MAO coating.

57 citations

Journal ArticleDOI
TL;DR: In this article, a new MoVTeO mixed oxide has been obtained during the calcination of the corresponding catalyst precursor mixture at 600 °C in N2. The crystal structure has been studied by means of X-ray diffracti...
Abstract: A new MoVTeO mixed oxide has been obtained during the calcination of the corresponding catalyst precursor mixture at 600 °C in N2. The crystal structure has been studied by means of X-ray diffracti...

57 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202318
202265
2021184
2020198
2019175
2018178