Li Wei, Wang Guojing, Chen Chienhua, Liao Jiecui, Li Zhengcao
State Key Lab of New Ceramic and Fine Processing, School of Materials Science & Engineering, Tsinghua University, Beijing 100084, China.
Key Lab of Advanced Materials Laboratory (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Nanomaterials (Basel). 2017 Jan 19;7(1):20. doi: 10.3390/nano7010020.
In this research, ZnO nanowires doped with Mn and Co ions were synthesized through a facile and inexpensive hydrothermal approach, in which Mn and Co ions successfully substituted Zn in the ZnO crystal lattice without changing the morphology and crystalline structure of ZnO. The atomic percentages of Mn and Co were 6.29% and 1.68%, respectively, in the doped ZnO nanowires. The photocatalytic results showed that Mn-doped and Co-doped ZnO nanowires both exhibited higher photocatalytic activities than undoped ZnO nanowires. Among the doped ZnO nanowires, Co-doped ZnO, which owns a twice active visible-light photocatalytic performance compared to pure ZnO, is considered a more efficient photocatalyst material. The enhancement of its photocatalytic performance originates from the doped metal ions, which enhance the light absorption ability and inhibit the recombination of photo-generated electron-hole pairs as well. The effect of the doped ion types on the morphology, crystal lattice and other properties of ZnO was also investigated.
在本研究中，通过一种简便且低成本的水热法合成了掺杂锰离子和钴离子的氧化锌纳米线，其中锰离子和钴离子成功地取代了氧化锌晶格中的锌，而没有改变氧化锌的形态和晶体结构。在掺杂的氧化锌纳米线中，锰和钴的原子百分比分别为6.29%和1.68%。光催化结果表明，锰掺杂和钴掺杂的氧化锌纳米线均表现出比未掺杂的氧化锌纳米线更高的光催化活性。在掺杂的氧化锌纳米线中，钴掺杂的氧化锌相比于纯氧化锌具有两倍的可见光光催化活性，被认为是一种更高效的光催化材料。其光催化性能的增强源于掺杂的金属离子，这些离子增强了光吸收能力并抑制了光生电子 - 空穴对的复合。还研究了掺杂离子类型对氧化锌的形态、晶格和其他性质的影响。
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