Liang Yuan-Chang, Li Tsun-Hsuan
Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, Taiwan.
Nanomaterials (Basel). 2022 Jul 30;12(15):2634. doi: 10.3390/nano12152634.
A TiO nanorod template was successfully decorated with a copper oxide layer with various crystallographic phases using sputtering and postannealing procedures. The crystallographic phase of the layer attached to the TiO was adjusted from a single CuO phase or dual CuO-CuO phase to a single CuO phase by changing the postannealing temperature from 200 °C to 400 °C. The decoration of the TiO (TC) with a copper oxide layer improved the light absorption and photoinduced charge separation abilities. These factors resulted in the composite nanorods demonstrating enhanced photoactivity compared to that of the pristine TiO. The ternary phase composition of TC350 allowed it to achieve superior photoactive performance compared to the other composite nanorods. The possible Z-scheme carrier movement mechanism and the larger granular size of the attached layer of TC350 under irradiation accounted for the superior photocatalytic activity in the degradation of RhB dyes.
采用溅射和退火后处理工艺，成功地在TiO纳米棒模板上修饰了具有各种晶体相的氧化铜层。通过将退火后温度从200℃改变到400℃，附着在TiO上的层的晶体相从单一的CuO相或双CuO-Cu₂O相调整为单一的CuO相。用氧化铜层修饰TiO（TC）提高了光吸收和光生电荷分离能力。这些因素导致复合纳米棒与原始TiO相比表现出增强的光活性。TC350的三元相组成使其与其他复合纳米棒相比具有优异的光活性性能。可能的Z型载流子移动机制以及TC350在光照下附着层的较大颗粒尺寸解释了其在降解罗丹明B染料方面的优异光催化活性。
