Hydrothermal Synthesis of Mo-Doped VO₂/TiO₂ Composite Nanocrystals with Enhanced Thermochromic Performance

Abstract

This\npaper reports a one-step TiO₂ seed-assistant hydrothermal\nsynthesis of Mo-doped VO₂(M)/TiO₂ composite\nnanocrystals. It was found that excess Mo doping can promote formation\nof the VO₂(M) phase, and rutile TiO₂ seed is\nbeneficial to morphology control, size reduction, and infrared modulation\nof Mo-doped VO₂(M) nanocrystals. The Mo-doped VO₂ nanocrystals epitaxially grow on TiO₂ seeds and have\na quasi-spherical shape with size down to 20 nm and a nearly 35% infrared\nmodulation near room temperature. The findings of this work demonstrate\nimportant progress in the near-room-temperature thermochromic performance\nof VO₂(M) nanomaterials, which will find potential application\nin constructing VO₂(M) nanocrystal-based smart window coatings.