纳米ZnO的温和液相法制备及其光催化性能

以ZnCl₂作为锌源，采用液相法制备了由粒径约17 nm的氧化锌粒子组合而成的花状六方纤锌矿晶体结构的氧空位缺陷型ZnO纳米材料，对制备的ZnO纳米材料的结构、形貌和成分进行了表征，计算了其禁带宽度，并通过光催化降解亚甲基蓝研究了其光催化性能.结果表明：氧空位缺陷型ZnO纳米材料具有很好的结晶度和形貌，且禁带宽度为3.17 eV,低于普通ZnO的禁带宽度.当光催化降解亚甲基蓝溶液0.5、2.5 h时，降解率分别为20%和80%,降解速度是普通Ag纳米颗粒掺杂氧化锌的4倍，表明制备的氧空位缺陷型ZnO纳米材料具有优异的光催化性能.

Preparation of nano-ZnO by gentle liquid phase method and its photocatalytic performance

Using ZnCl₂ as the zinc source, a flower-like hexagonal wurtzite structure oxygen vacancy-deficient nano-ZnO material composed of zinc oxide particles with a particle size of about 17 nm was prepared by a liquid phase method. The structure, morphology and composition were characterized. The band gap of the prepared ZnO was calculated by UV-Vis absorption spectroscopy. Its photocatalytic properties were investigated using methylene blue. The results show that the oxygen vacancy defect ZnO nanomaterials have good crystallinity and morphology, and the band gap width is 3.17 eV, which is lower than that of ordinary ZnO. When photocatalytic degradation of methylene blue solution for 0.5 h and 2.5 h, the degradation rates are 20% and 80% respectively, and the degradation rate is 4 times higher than that of ordinary Ag nanoparticles doped zinc oxide, indicating that the prepared oxygen vacancy defect ZnO nanomaterials have excellent photocatalytic properties.