Abd Aziz Siti Nor Qurratu Aini, Pung Swee-Yong, Ramli Nurul Najiah, Lockman Zainovia
Science and Engineering of Nanomaterials Team, School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia ; Green Electronic Nanomaterials Group, School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia.
Science and Engineering of Nanomaterials Team, School of Materials and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia.
ScientificWorldJournal. 2014 Jan 22;2014:252851. doi: 10.1155/2014/252851. eCollection 2014.
The photodegradation efficiency of ZnO nanoparticles in removal of organic pollutants deteriorates over time as a high percentage of the nanoparticles can be drained away by water during the wastewater treatment. This problem can be solved by growing the ZnO nanorods on stainless steel wire. In this work, ZnO nanorods were successfully grown on stainless steel wire by chemical vapour deposition. The SAED analysis indicates that ZnO nanorod is a single crystal and is preferentially grown in [0001] direction. The deconvoluted O 1s peak at 531.5 eV in XPS analysis is associated with oxygen deficient, revealing that the ZnO nanorods contain many oxygen vacancies. This observation is further supported by the finding of the small I(uv)/I(vis) ratio, that is, ~1 in the photoluminescence analysis. The growth of ZnO nanorods on stainless steel wire was governed by vapour-solid mechanism as there were no Fe particles observed at the tips of the nanorods. The photodegradation of Rhodamine B solution by ZnO nanorods followed the first-order kinetics.
在去除有机污染物的过程中，随着污水处理过程中高比例的纳米颗粒会被水冲走，氧化锌纳米颗粒的光降解效率会随着时间而降低。通过在不锈钢丝上生长氧化锌纳米棒可以解决这个问题。在这项工作中，通过化学气相沉积法成功地在不锈钢丝上生长了氧化锌纳米棒。选区电子衍射分析表明，氧化锌纳米棒是单晶，且优先沿[0001]方向生长。X射线光电子能谱分析中531.5 eV处解卷积后的O 1s峰与氧缺陷有关，这表明氧化锌纳米棒含有许多氧空位。光致发光分析中较小的I(uv)/I(vis)比值（即~1）这一发现进一步支持了这一观察结果。由于在纳米棒的尖端未观察到铁颗粒，所以氧化锌纳米棒在不锈钢丝上的生长遵循气-固机制。氧化锌纳米棒对罗丹明B溶液的光降解遵循一级动力学。
