Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, 1# Shida Road, Nanchong 637000, People's Republic of China.
J Hazard Mater. 2011 Aug 30;192(2):730-40. doi: 10.1016/j.jhazmat.2011.05.082. Epub 2011 Jun 1.
A facile one-step hydrothermal route was demonstrated to grow ZnO nanorod arrays and hierarchical nanostructures on arbitrary substrates without any catalysts and seeds coated before the reaction, which are prerequisite in the current two-step protocol. Meanwhile, ZnO nanoflowers composed of nanorods were obtained at the bottom of the autoclaves in the absence of substrates. An in situ spontaneous-seeds-assisted growth mechanism was tentatively proposed on the basis of the experimental data to explain the growth process of ZnO nanostructures. Moreover, the obtained ZnO nanorod arrays exhibited superior photocatalytic activity for decomposing methyl orange, and the nanoflowers showed better gas sensing performance towards some flammable gases and corrosive vapors with high sensitivity, rapid response-recovery characteristics, good selectivity and long-term stability.
一种简单的一步水热法被证明可以在没有任何催化剂和种子的情况下，在任意基底上生长 ZnO 纳米棒阵列和分级纳米结构，而这在当前的两步法中是必需的。同时，在没有基底的情况下，在高压釜的底部获得了由纳米棒组成的 ZnO 纳米花。基于实验数据，提出了一种原位自发种子辅助生长机制来解释 ZnO 纳米结构的生长过程。此外，所获得的 ZnO 纳米棒阵列在分解甲基橙方面表现出优异的光催化活性，而纳米花对一些易燃气体和腐蚀性蒸气具有更高的灵敏度、快速的响应-恢复特性、良好的选择性和长期稳定性，表现出更好的气体传感性能。
