Mintcheva Neli, Aljulaih Ali A, Wunderlich Wilfried, Kulinich Sergei A, Iwamori Satoru
Institute of Innovative Science and Technology, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan.
Department of Chemistry, University of Mining and Geology, Sofia 1700, Bulgaria.
Materials (Basel). 2018 Jul 3;11(7):1127. doi: 10.3390/ma11071127.
This work aimed to prepare nanostructures of ZnO with various lasers, testing them as photocatalysts, and comparing their morphology and activity in the degradation of organic pollutants in aqueous media. ZnO nanospheres (ns-ZnO) and ZnO nanorods (ms-ZnO) were prepared via the laser ablation of a Zn metal plate in water using nanosecond- and millisecond-pulsed lasers, respectively. The obtained materials were characterized using a set of optical, structural, and surface-science techniques, such as UV-vis spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Under visible-light irradiation, both nanostructures were found to be catalytically active toward the oxidation of methylene blue, which was used as a model compound. The ZnO nanorods fabricated with the millisecond laser showed better photocatalytic performance than their spherically shaped counterparts obtained by means of the nanosecond laser, which could be assigned to a larger number of defects on the ms-ZnO surface.
这项工作旨在用不同的激光制备氧化锌纳米结构，将其作为光催化剂进行测试，并比较它们在水介质中降解有机污染物时的形态和活性。分别使用纳秒脉冲激光和毫秒脉冲激光通过在水中对锌金属板进行激光烧蚀制备了氧化锌纳米球（ns-ZnO）和氧化锌纳米棒（ms-ZnO）。使用一系列光学、结构和表面科学技术对所得材料进行了表征，如紫外可见光谱、X射线衍射（XRD）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）。在可见光照射下，发现这两种纳米结构对用作模型化合物的亚甲基蓝的氧化具有催化活性。用毫秒激光制备的氧化锌纳米棒比通过纳秒激光获得的球形对应物表现出更好的光催化性能，这可归因于ms-ZnO表面存在更多的缺陷。
