Electrodeposition of Zn-Co-Terephthalate MOF and Its Conversion to Co-Doped ZnO Thin Films
Electrodeposition of Zn-Co-Terephthalate MOF and Its Conversion to Co-Doped ZnO Thin Films
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电沉积对苯二甲酸锌钴 MOF 及其转化为共掺杂 ZnO 薄膜
DOI：
10.1149/2162-8777/abfae1
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发表时间：
2021
影响因子：
2.2
通讯作者：
Tsukasa Yoshida
中科院分区：
文献类型：
--
作者：
Tensho Nakamura;Hana Kudo;Yuki Tsuda;Yuta Matsushima;Tsukasa Yoshida
将过渡金属掺杂到氧化锌中，使其成为磁性半导体和电催化剂，具有重要的研究意义。将金属有机骨架(MOF)通过对苯二甲酸(TPA)桥联到富氧的含CoCl2和CoCl2的水溶液中，电沉积金属有机骨架(MOF)薄膜。通过450℃的热处理，将金属有机骨架(MOF)转变为Co掺杂的氧化锌薄膜，以烧掉TPA，促进结晶。在不加TPA的情况下，简单地将ZnCl2和CoCl2混合后，Co2Cl(OH)3与氧化锌一起电沉积，证明了TPA对溶解度和还原电位有很大差异的Zn2+和Co2+离子的混合是有效的。由于CoCl2的过量添加导致了金属Co的电沉积，因此可以达到的最大掺杂浓度约为8%。
Doping of transition metals to zinc oxide (ZnO) is of great interest for its functionalization as magnetic semiconductor and electrocatalyst. In this study, electrodeposition of metal organic framework (MOF) thin films, in which zinc and cobalt ions are bridged by terephthalic acid (TPA), was made possible by adding TPA to an O 2-saturated aqueous solution containing ZnCl 2 and CoCl 2. The resulting Zn-Co-TPA MOF was converted to a Co-doped ZnO thin film by annealing at 450 C to burn away TPA and promote crystallization. Simple mixture of ZnCl 2 and CoCl 2 without TPA resulted in electrodeposition of Co 2 Cl (OH) 3 along with ZnO, proving usefulness of TPA to blend Zn 2+ and Co 2+ ions having largely different solubilities and reduction potentials. The maximum achievable doping concentration was about 8%, because excessive addition of CoCl 2 resulted in electrodeposition of metallic Co.