A Facile Route to the Preparation of Highly Uniform ZnO@TiO2 Core-Shell Nanorod Arrays with Enhanced Photocatalytic Properties
A Facile Route to the Preparation of Highly Uniform ZnO@TiO2 Core-Shell Nanorod Arrays with Enhanced Photocatalytic Properties
复制标题
制备具有增强光催化性能的高度均匀 ZnO@TiO2 核壳纳米棒阵列的简便途径
DOI：
10.1155/2017/8579896
复制
发表时间：
2017-04
影响因子：
3
通讯作者：
Yongxing Zhang
中科院分区：
文献类型：
--
作者：
Yuanyuan Zhao;Peifei Tong;Dong Ma;Bing Li;Qinzhuang Liu;San Chen;Yongxing Zhang
ZnO@TiO2 核壳纳米棒阵列的设计和合成作为有前景的光催化剂已被广泛报道。然而，开发一种低温、低成本、环境友好的方法来大面积制备ZnO@TiO2核壳纳米棒阵列以用于未来的器件应用仍然是一个挑战。本文设计了一种简便、绿色、高效的路线，通过气热法在相对较低的温度下在锌片上大面积制备具有高度均匀核壳结构的ZnO@TiO2纳米棒阵列。生长机制被提出为逐层组装。亚甲基蓝（MB）的光催化分解反应表明，与ZnO纳米棒阵列的性能相比，ZnO@TiO2核壳纳米棒阵列具有优异的光催化活性。光催化活性的提高可归因于核壳结构，可以有效降低电子空穴对的复合率，显着增加光吸收范围，并为有机污染物的分解提供高密度的表面活性催化位点。此外，ZnO@TiO2核壳纳米棒阵列催化剂用于水净化过程时，很容易分离或回收。
Design and synthesis of ZnO@TiO2 core-shell nanorod arrays as promising photocatalysts have been widely reported. However, it remains a challenge to develop a low-temperature, low-cost, and environmentally friendly method to prepare ZnO@TiO2 core-shell nanorod arrays over a large area for future device applications. Here, a facile, green, and efficient route is designed to prepare the ZnO@TiO2 nanorod arrays with a highly uniform core-shell structure over a large area on Zn wafer via a vapor-thermal method at relatively low temperature. The growth mechanism is proposed as a layer-by-layer assembly. The photocatalytic decomposition reaction of methylene blue (MB) reveals that the ZnO@TiO2 core-shell nanorod arrays have excellent photocatalytic activities when compared with the performance of the ZnO nanorod arrays. The improved photocatalytic activity could be attributed to the core-shell structure, which can effectively reduce the recombination rate of electron-hole pairs, significantly increase the optical absorption range, and offer a high density of surface active catalytic sites for the decomposition of organic pollutants. In addition, it is very easy to separate or recover ZnO@TiO2 core-shell nanorod array catalysts when they are used in water purification processes.
登录
查看更多内容
影响因子：
6.7
作者：
Ruosong Wang;Xiaoxue Xu;Yi Zhang;Zhimin Chang;Zaicheng Sun;W. Dong
通讯作者：
Ruosong Wang;Xiaoxue Xu;Yi Zhang;Zhimin Chang;Zaicheng Sun;W. Dong
影响因子：
1.8
作者：
Ming Wang;C. Ye;Ye Zhang;G. Hua;Huixin Wang;M. Kong;Lide Zhang
通讯作者：
Ming Wang;C. Ye;Ye Zhang;G. Hua;Huixin Wang;M. Kong;Lide Zhang
影响因子：
--
作者：
Ruosong Wang;H. Tan;Zhao Zhao-Zhao;Guoqiang Zhang;Laiwen Song;W. Dong;Zaicheng Sun
通讯作者：
Ruosong Wang;H. Tan;Zhao Zhao-Zhao;Guoqiang Zhang;Laiwen Song;W. Dong;Zaicheng Sun
影响因子：
17.6
作者：
Min-Hsin Yeh;Lu-Yin Lin;Chen-Yu Chou;Chuan-Pei Lee;Hui-Min Chuang;R. Vittal;K. Ho
通讯作者：
Min-Hsin Yeh;Lu-Yin Lin;Chen-Yu Chou;Chuan-Pei Lee;Hui-Min Chuang;R. Vittal;K. Ho
影响因子：
3.7
作者：
Wilson A. Smith;Yiping Zhao
通讯作者：
Wilson A. Smith;Yiping Zhao