Enhanced Visible Light Photocatalytic Activity of ZnO Nanowires Doped with Mn(2+) and Co(2+) Ions.
Enhanced Visible Light Photocatalytic Activity of ZnO Nanowires Doped with Mn(2+) and Co(2+) Ions.
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DOI：
10.3390/nano7010020
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发表时间：
2017-01-19
期刊：
影响因子：
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通讯作者：
Li Z
中科院分区：
文献类型：
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作者：
Li W;Wang G;Chen C;Liao J;Li Z
本研究通过简便且廉价的水热法合成了掺杂Mn2+和Co2+离子的ZnO纳米线，其中Mn2+和Co2+离子成功取代了ZnO晶格中的Zn2+，且没有改变ZnO的形貌和晶体结构。掺杂ZnO纳米线中Mn和Co的原子百分比分别为6.29%和1.68%。光催化结果表明，Mn掺杂和Co掺杂的ZnO纳米线均比未掺杂的ZnO纳米线表现出更高的光催化活性。在掺杂ZnO纳米线中，Co掺杂ZnO具有比纯ZnO高两倍的可见光光催化性能，被认为是一种更高效的光催化剂材料。其光催化性能的增强源于掺杂金属离子，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 ZnO 形貌、晶格和其他性能的影响。
In this research, ZnO nanowires doped with Mn2+ and Co2+ ions were synthesized through a facile and inexpensive hydrothermal approach, in which Mn2+ and Co2+ ions successfully substituted Zn2+ 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.