Stacked ZnO nanorods synthesized by solution precipitation method and their photocatalytic activity study
Stacked ZnO nanorods synthesized by solution precipitation method and their photocatalytic activity study
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DOI：
10.1007/s10971-015-3646-z
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发表时间：
2015-02
影响因子：
2.5
通讯作者：
M. Thein;S. Pung;A. Aziz;M. Itoh
中科院分区：
文献类型：
--
作者：
M. Thein;S. Pung;A. Aziz;M. Itoh
摘要zno是一种很有前途的光催化剂。为了提高ZnO粒子的光催化活性，人们已经做了很多工作，但是很难合成形貌可控的高光催化活性ZnO粒子。本文采用溶液沉淀法在不同生长时间合成了堆叠ZnO纳米棒。堆积ZnO纳米棒的长度和直径随生长时间的延长而增加。堆积ZnO纳米棒的形成是由于在合成过程中，较小的ZnO纳米棒尖端的（002）极性表面的连接。加入少量PVP可以减少ZnO纳米棒的团聚和二次成核。光催化研究表明，ZnO纳米棒在紫外光下对RhB溶液的光降解符合一级动力学。结果还表明，堆积ZnO纳米棒的有效表面积越大，对有机分子的吸附越高，对RhB染料的光催化活性越高。摘要溶液沉淀法合成叠加ZnO纳米棒及其光催化活性研究。
AbstractZnO has been considered as a promising photocatalyst for wastewater treatment. Although many works have been done to enhance the photocatalytic activity of ZnO particles, it is difficult to synthesize well-controlled morphology of ZnO particles having high photocatalytic activity. In this work, stacked ZnO nanorods were synthesized at different growth time via solution precipitation method. Their length and diameter of stacked ZnO nanorods increased with growth time. The formation of stacked ZnO nanorods was attributed to the joining of (002) polar surfaces at the tips of a smaller ZnO nanorods during the synthesis process. A small amount of PVP was added to minimize the agglomeration and to reduce the secondary nucleation of ZnO nanorods. The photocatalytic study showed that the photodegradation of RhB solution by stacked ZnO nanorods under UV light followed first-order kinetic. The results also indicated that a larger effective surface area of stacked ZnO nanorods leads to a higher adsorption of organic molecules, causing a better photocatalytic activity for RhB dye removal.Graphical AbstractStacked ZnO nanorods synthesized by solution precipitation method and their photocatalytic activity study.