Semiconductor materials have attracted considerable interest as nanozyme catalysts due to their robust stability across diverse environments, with recycled SiC presenting not only excellent chemical and thermal properties but also significant environmental advantages. Leveraging recycled SiC supports sustainability by minimizing waste and conserving resources. Research has demonstrated that specific composites of semiconductors and nanometals—such as gold, silver, and platinum exhibit enhanced photocatalytic activity via the surface plasmon resonance (SPR) effect, which amplifies hot electron excitation and prolongs the lifespan of high-energy electrons. The integration of platinum nanoparticles with recycled SiC yields an exceptionally effective material for visible-light photocatalysis, advancing eco-friendly initiatives in catalytic applications.