Oxides are chemical compounds in which oxygen is combined with one or more other elements, typically in a formal oxidation state of minus two. They form one of the largest and most diverse classes of inorganic materials, spanning ionic metal oxides, covalent oxides of nonmetals, and complex mixed-metal structures. O…
Oxides are chemical compounds in which oxygen is combined with one or more other elements, typically in a formal oxidation state of minus two. They form one of the largest and most diverse classes of inorganic materials, spanning ionic metal oxides, covalent oxides of nonmetals, and complex mixed-metal structures. Oxides are commonly classified by acid-base behavior into basic, acidic, amphoteric, and neutral types, and structurally into binary oxides and ternary or higher phases such as the perovskite and related families, in which ordered cation sublattices give rise to tunable electronic, magnetic, optical, and catalytic properties. This structural versatility underlies their importance across materials science. In environmental chemistry, oxide-based materials, including doped perovskite oxides, are studied as adsorbents and catalysts for removing dyes and other contaminants from aqueous solution, where surface area, defect chemistry, and the substitution of cations at specific lattice sites govern adsorption capacity and reactivity. Oxides also serve as semiconductors, dielectrics, pigments, refractory and structural ceramics, and components of energy-conversion systems, and their interaction with concentrated radiation and heat is relevant to solar and high-temperature applications. Because composition, stoichiometry, and the deliberate introduction of dopants and vacancies strongly influence performance, the synthesis and characterization of oxides remain central to designing functional and remediation materials.
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