Abstract
Hollow silica particles (or mesoporous hollow silica particles) are sought after for applications across several fields, including drug delivery, battery anodes, catalysis, thermal insulation, and functional coatings. Significant progress has been made in hollow silica particle synthesis and several new methods are being explored to use these particles in real-world applications. This review article presents a brief and critical discussion of synthesis strategies, characterization techniques, and current and possible future applications of these particles.
Highlights
In recent years, hollow materials have attracted significant attention from scientists working in different fields
Hollow particles are the most interesting class, with applications ranging from uses in energy storage to coatings
The most common strategy for synthesis of hollow silica particles (HSPs) involves the use of polymer or copolymer particles (e.g., polystyrene, polyresorcinol, polymethylmethacrylate (PMMA), poly(methylmethacrylate-co-2-diethylaminomethyl methacrylate)) as templates [50,51,52,53,54,55]
Summary
Hollow materials have attracted significant attention from scientists working in different fields. Different materials have been used to create hollow particles, such as ZnO, Si, TiO2, C, SiO2, and SnO2 [6,7,8,9,10,11,12,13,14] Among these hollow particle options, hollow silica particles (HSPs) are highly sought after because of the low cost of the material and its synthesis process, their well-known chemistry, and their wide applications, ranging from energy storage to functional coatings [15,16,17,18,19,20,21,22,23]. The terms “particles” and “HSPs” are interchangeably used in the manuscript
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