Molecular Routes to Group IV Magnesium and Calcium Nanocrystalline Ceramics

Petrus, Rafał; Drág-Jarzábek, Anna; Utko, Józef; Bykowski, Dominik; Lis, Tadeusz; Sobota, Piotr

doi:10.1021/acs.inorgchem.7b01772

Cited by 9 publications

(16 citation statements)

References 54 publications

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“…The synthesis of CMOs is often challenging, due to difficulties with controlling the exact stoichiometry, structure and homogeneity of the final species. 11,12,15,30 Such challenges are not helped by the harsh conditions often required for traditional 'ceramic' solid-state synthesis. 30,31 Conventional ceramic routes include solid-state reactions using oxide, carbonate, or nitrate precursors, often requiring high temperature processing, particularly if highly-crystalline products are required.…”

Section: Traditional Synthesis Of Complex Metal Oxidesmentioning

confidence: 99%

“…32 These approaches may give poor control over stoichiometry and phase purity. 12,33,34 High temperature methods can drive phase separation and/or may only access thermodynamic products, 15 and volatile components can also be released altering the designed stoichiometries. 35 High temperatures also dictate the crystallinity, particle size and porosity of the produced materials, reducing opportunities to design specific attributes for applications.…”

Section: Traditional Synthesis Of Complex Metal Oxidesmentioning

confidence: 99%

“…The use of mixed-metal (heterometallic) complexes or frameworks, which contain more than one metal, as SSPs provides alternative synthetic routes to access CMOs. 11,39,40 Using an SSP has been reported to display advantages such as simplifying material synthesis; 26,27 access to unusual or otherwise inaccessible products; 12,30,41 or materials with enhanced performance. [42][43][44] By incorporating all of the required metals into one precursor, the stoichiometry is defined at the molecular level.…”

Section: Opportunities Using Mixed-metal Precursorsmentioning

confidence: 99%

“…30,[55][56][57][58] Many examples state the ability of SSPs to decompose and crystallise into CMOs at much lower temperatures than in traditional solid-state ceramic methods. 11,12,18,23,34,41,42,54,56,59 Decomposition of metal-organic species requires the release of gaseous organic decomposition products (and possibly solvent molecules), and the release of these gases may influence the particle size and porosity of the produced oxide. Higher organic content in precursors allows for greater porosity and smaller particle sizes in their decomposition products, attributed to greater gas escape during thermolysis.…”

Section: Solid-state Thermolysismentioning

confidence: 99%

“…We define this broad group of materials as complex metal oxides (CMOs) which include mixed-metal oxides (AxByOz), heterometal doped metal oxides (B:AxOy) or composite metal oxides with a mixture of oxide phases (AwOx/ByOz). Today, many types of mixed-metal oxides are accessible from SSPs including perovskites (ABO3), [10][11][12][13][14][15][16] pyrochlores (A2B2O7), 17 spinels (AB2O4), [18][19][20][21][22][23][24][25] metal vanadates [Mx(VO4)y], 26,27 feldspars (MAl2Si2O8) 28 and Aurivilius phases (Bi2O2)(An−1BnO3n+1). 29…”

Section: Introductionmentioning

confidence: 99%

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The use of mixed-metal single source precursors for the synthesis of complex metal oxides

Wright

Pike

2020

Chem. Commun.

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Section: Traditional Synthesis Of Complex Metal Oxidesmentioning

confidence: 99%

Section: Traditional Synthesis Of Complex Metal Oxidesmentioning

confidence: 99%

Section: Opportunities Using Mixed-metal Precursorsmentioning

confidence: 99%

Section: Solid-state Thermolysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The use of mixed-metal single source precursors for the synthesis of complex metal oxides

Wright

Pike

2020

Chem. Commun.

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Structural diversity in transition metal-doped titanium oxo-alkoxy complexes: Potential sol-gel intermediates for doped titania nanoparticles and complex titanates

Svensson

2022

J Sol-Gel Sci Technol

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Since the discovery of its photocatalytic properties, titanium dioxide has remained one of the most popular and widely used metal oxide photocatalysts. Its major drawback, however, lies in the narrow region (UV) of sunlight necessary to produce reactive oxygen species. This have been countered by sensitizing with organic dyes to red-shift the absorption spectrum but also with doping of other metals and non-metals. Volume doping or surface modification have demonstrated improved photocatalytic efficiency, mainly via red-shifted absorption by introduction of intermediate energy states between the valence band (VB) and conduction band (CB) and increased number of surface hydroxyl groups (which can form reactive hydroxyl radicals) from charge compensation, and in some cases by improved surface-adsorption of organic molecules. Doped titania and complex titanates have traditionally been produced via, for instance, co-precipitation of mixed metal salts or via solid-state synthesis. While these methods usually are simple, they offer limited control over size, shape, and phase composition. An alternative is the use of single-source precursors (SSPs), i.e., molecules already containing the desired metal ratio in a homogenous distribution. The last one or two decades have seen an increased number of reported transition metal-doped titanium oxo-alkoxides (TOA), particularly for the first-row transition metals as potential single-source precursors (SSP) for doped titania and complex titanates. This review aims at providing an overview of TM-doped TOAs, focusing on first and second row TM elements, with special emphasis on their synthesis, photochemical properties, and their applications as SSPs.

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