半导体纳米材料因受尺寸量子效应和介电限域效应等特性的影响，往往具有不同于块体材料和原子或分子的介观性质，在材料学、物理学、化学、催化和环保等方面具有广泛的用途。本文介绍了半导体超微粒的基本性质和光电化学特性以及在光能利用方面的应用前景 Due to the effects of size quantum effect and dielectric confinement, semiconductor nanomaterials often have mesoscopic properties different from that of bulk materials and atoms or molecules, and have the advantages of material science, physics, chemistry, catalysis and environmental protection Wide range of uses. This article describes the basic properties and photoelectrochemical properties of semiconductor ultrafine particles and their potential applications in light energy