“…The structure and character of nanomaterials determine their function and applications. In particular, as a kind of distinctive morphology, hollow microsphere (HMS) structures have been widely used in various fields, including catalysis, [1,2] sensing, [3,4] ion batteries, [5,6] supercapacitors, [7] photochemical solar cells, [8] and drug delivery, [9,10] due to their hollow structure, unique optical and electrical properties, large surface area, and good electronic transfer channels. However, most HMS materials are usually synthesized by either hydrothermal methods or hard template methods, which suffer from high security requirements, complicated template removal procedures, high temperatures (even calcination), and the use of harmful surfactants or organic solvents.…”