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This review provides a broad overview of the structural characteristics, compositional flexibility, and structure–property relationships of hollandite materials. Hollandites have a general formula A_xB₈O₁₆, x ≤ 2, with ‘A’ cations located in one-dimensional tunnels formed by a framework of ‘B’–O octahedra. With numerous possibilities for chemical and structural modifications, hollandite family provides many opportunities to manipulate its properties for specific applications. First, we review the chemistry, structure–property relationship, and processing techniques for various applications. The primary focus is on the cumulative effects of A- and B-cation interaction, and the resultant parameters including unit cell symmetry, cation order–disorder, electronic and/or magnetic coupling, that dictate the material's applicability. Then, selected applications, such as crystalline hosts for radioactive caesium disposal, electrode material for Li-ion batteries, and ferromagnetic materials, are outlined from a structure–property relationship perspective. Finally, processing strategies in correlation with structural evolution and applications are briefly addressed.

26:T470,

Grand challenges facing humanity today are closely linked to the rapid exhaustion of natural resources in conjunction with the massive growth of industrial production that sustains the booming world population. The processing of animal skin waste to create collagen-based materials has the potential to provide an eco-friendly method to develop multifunctional materials such as films, sponges/scaffolds, fibers, gels, etc., that could contribute to technological advancements in different sectors. Hence in this review, we present methods for potential improvements in the development of collagen-based materials from a materials science perspective. We explored different possible approaches for utilizing collagen to generate multifunctional materials that exhibit outstanding properties, in combination with mechanical robustness and chemical stability. In sum, this review will present collagen as an eco-friendly resource that can be used to produce multifunctional, recyclable, biocompatible, and biodegradable materials that are ideal for new technologies in materials science, biomedicine, and environmental remediation.

27:T40b,

The solution combustion synthesis technique is a versatile method for the production of powders used in a variety of applications. It has been used to produce hundreds of compounds, thus demonstrating its versatility, espe