School of Systems Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada cho, Kami City 782-8502, Kochi, Japan.
Center of Nanotechnology, Kochi University of Technology, 185 Miyanokuchi, Tosayamada cho, Kami City 782-8502, Kochi, Japan.
Molecules. 2023 Jan 3;28(1):397. doi: 10.3390/molecules28010397.
Zinc oxide nanorods were grown on an aluminum-doped zinc oxide seeds layer using the chemical bath deposition method. The effects of growth reaction time on the structural, optical, and photocatalytic properties of zinc oxide nanorods were investigated. It was clearly observed that the growth direction of zinc oxide nanorods were dependent on the crystallinity of the as-deposited aluminum-doped zinc oxide seed layer. The crystallinity of the obtained zinc oxide nanorods was improved with the increase in reaction times during the chemical bath deposition process. The mechanism of zinc oxide nanorod growth revealed that the growth rate of nanorods was influenced by the reaction times. With increasing reaction times, there were much more formed zinc oxide crystalline stacked growth along the c-axis orientation resulting in an increase in the length of nanorods. The longest nanorods and the high crystallinity were obtained from the zinc oxide nanorods grown within 5 h. The optical transmittance of all zinc oxide nanorods was greater than 70% in the visible region. Zinc oxide nanorods grown for 5 h showed the highest degradation efficiency of methyl red under ultraviolet light and had a high first-order degradation rate of 0.0051 min. The photocatalytic mechanism was revealed as well.
氧化锌纳米棒通过化学浴沉积法在掺铝氧化锌种子层上生长。研究了生长反应时间对氧化锌纳米棒的结构、光学和光催化性能的影响。可以清楚地观察到，氧化锌纳米棒的生长方向取决于沉积的掺铝氧化锌种子层的结晶度。随着化学浴沉积过程中反应时间的增加，获得的氧化锌纳米棒的结晶度得到提高。氧化锌纳米棒生长的机制表明，纳米棒的生长速率受到反应时间的影响。随着反应时间的增加，更多的氧化锌晶沿 c 轴取向堆积生长，导致纳米棒的长度增加。在 5 h 内生长的氧化锌纳米棒具有最长的纳米棒和最高的结晶度。所有氧化锌纳米棒在可见光区的透光率均大于 70%。在紫外光下，生长 5 h 的氧化锌纳米棒对甲基红的降解效率最高，具有 0.0051 min 的高一级降解速率。还揭示了光催化机制。
