Facile Synthesis of Single Crystalline Rhenium (VI) Trioxide Nanocubes with High Catalytic Efficiency for Photodegradation of Methyl Orange

► Single-crystalline ReO3 nanocubes have been prepared. ► Metallic ReO3 nanocubes possess SPR bands down to the NIR region. ► ReO3 nanocubes show high catalytic activity toward photodegradation of azo dye.