Rational design of interwoven SiO 2 @Gr/N-CNT heterostructures from Fe–C–Si alloys for achieving superior electromagnetic wave absorption

This study prepared SiO 2 @graphite (Gr)/N-doped carbon nanotube (N-CNT) (SiO 2 @Gr/N-CNT) composite materials with an Fe–C–Si alloy and melamine as raw materials using simple acid leaching, mechanical ball milling, and in situ pyrolysis.