Journal
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
Volume 10, Issue 5, Pages -Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2162-8777/abfae1
Keywords
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Funding
- Japan Society for the Promotion of Science (JSPS) [18H02068]
- Grants-in-Aid for Scientific Research [18H02068] Funding Source: KAKEN
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The electrodeposition of metal organic framework (MOF) thin films bridged by terephthalic acid (TPA) allowed the successful conversion to a Co-doped ZnO thin film. The addition of TPA was crucial in blending Zn2+ and Co2+ ions, with a maximum achievable doping concentration of about 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 ZnCl2 and CoCl2. The resulting Zn-Co-TPA MOF was converted to a Co-doped ZnO thin film by annealing at 450 degrees C to burn away TPA and promote crystallization. Simple mixture of ZnCl2 and CoCl2 without TPA resulted in electrodeposition of Co2Cl(OH)(3) along with ZnO, proving usefulness of TPA to blend Zn2+ and Co2+ ions having largely different solubilities and reduction potentials. The maximum achievable doping concentration was about 8%, because excessive addition of CoCl2 resulted in electrodeposition of metallic Co.
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