Characterization of Dark-Colored Nanoporous Anodic Films on Zinc
Source abstract
Abstract
In this study, zinc is anodized at different voltages in 0.1 mol·dm−3 KOH electrolyte to form nanoporous anodic films. Dark-colored anodic films are formed at anodizing voltages ≤6 V, whereas colorless anodic films are developed at voltages ≥7 V. The anodic films formed at all voltages consist of crystalline ZnO, which was identified by X-ray diffraction and Raman spectroscopy. The Raman spectra of the dark-colored anodic films show the enhanced intensity of the LO phonon mode due to electric-field-induced Raman scattering, which may be associated with the presence of metallic Zn nanoparticles in the anodic films. Scanning electron micrographs and transmission electron micrographs of the cross-section of the dark-colored anodized zinc reveal the formation of two-layer porous anodic films with a highly rough metal/film interface. In contrast, nanoporous anodic films of uniform thickness with a relatively flat metal/film interface are formed for the colorless anodized zinc. The transmission electron microscopy (TEM)/energy dispersive X-ray spectroscopy (EDS) analysis suggested the presence of zinc nanoparticles in the dark-colored anodic films. The non-uniform anodizing and the formation of metal-nanoparticle-dispersed porous anodic films cause the formation of dark-colored anodic films on zinc.
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Research context
OpenAlex topics: Anodic Oxide Films and Nanostructures · Corrosion Behavior and Inhibition · Nanoporous metals and alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
Advanced Technology Research Laboratories, Nippon Steel Corp., 20-1 Shintomi, Futtsu City, Chiba 293-8511, Japan
Funding
Nippon Steel Corp.
References (50)
Show source-provided references
1. Ordered metal nanohole arrays made by a two-step replication of honeycomb structures of anodic alumina10.1126/science.268.5216.1466 ↗
2. Porous aluminum oxide formed by anodizing in various electrolyte species10.2174/1573413711999150608144742 ↗
3. Corrosion behavior of anodized Al-Cu-Li alloy: The role of intermetallic particle-introduced film defects10.1016/j.corsci.2019.108110 ↗
4. Advanced hard anodic alumina coatings via etidronic acid anodizing10.1016/j.surfcoat.2017.07.043 ↗
5. Structure and physicochemistry of anodic oxide films on titanium and TA6V alloy10.1002/(SICI)1096-9918(199907)27:7<629::AID-SIA551>3.0.CO;2-0 ↗
6. One-dimensional titanium dioxide nanomaterials: nanotubes10.1021/cr500061m ↗
7. TiO2 nanotubes, nanochannels and mesosponge: Self-organized formation and applications10.1016/j.nantod.2013.04.010 ↗
8. Galvanostatic growth of nanoporous anodic films on iron in ammonium fluoride−ethylene glycol electrolytes with different water contents10.1021/jp1078136 ↗
9. Synthesis and photoelectrochemical properties of nanoporous iron (III) oxide by potentiostatic anodization10.1088/0957-4484/17/17/001 ↗
10. Ex situ evidence for the role of a fluoride-rich layer switching the growth of nanopores to nanotubes: A Missing Piece of the Anodizing Puzzle10.1002/celc.201800105 ↗
11. Self-organized cobalt fluoride nanochannel layers used as a pseudocapacitor material10.1039/C4CC01195C ↗
12. Electrochemically synthesized mesoscopic nickel oxide films as photocathodes for dye-sensitized solar cells10.1021/acsaem.8b00834 ↗
13. NiO layers grown on a Ni substrate by galvanostatic anodization as a positive electrode material for aqueous hybrid capacitors10.1016/j.jpowsour.2015.03.095 ↗
14. Understanding of anodization of zinc in an electrolyte containing fluoride ions10.1016/j.electacta.2008.06.006 ↗
15. Thick self-organized porous zirconium oxide formed in H2SO4/NH4F electrolytes10.1016/j.elecom.2004.09.003 ↗
16. Importance of water content in formation of porous anodic niobium oxide films in hot phosphate-glycerol electrolyte10.1016/j.electacta.2008.08.031 ↗
17. Porous tantalum oxide prepared by electrochemical anodic oxidation10.1149/1.1997153 ↗
18. Formation of porous anodic alumina at high current efficiency10.1088/0957-4484/18/41/415605 ↗
19. A tracer study of porous anodic alumina10.1149/1.2335938 ↗
20. A flow model of porous anodic film growth on aluminium10.1016/j.electacta.2006.05.054 ↗
21. Stress generated porosity in anodic alumina formed in sulphuric acid electrolyte10.1016/j.corsci.2007.03.036 ↗
22. The role of viscous flow of oxide in the growth of self-ordered porous anodic alumina films10.1038/nmat2423 ↗
23. Pore development in anodic alumina in sulphuric acid and borax electrolytes10.1016/j.corsci.2007.03.033 ↗
24. Tracer studies of anodic films formed on aluminium in malonic and oxalic acids10.1016/j.apsusc.2007.07.006 ↗
25. A tracer investigation of chromic acid anodizing of aluminium10.1002/sia.2601 ↗
26. Formation of porous anodic alumina in alkaline borate electrolyte10.1016/j.tsf.2007.01.013 ↗
27. The superior performance of the electrochemically grown ZnO thin films as methane sensor10.1016/j.snb.2008.02.035 ↗
28. Nanoporous ZnO thin films deposited by electrochemical anodization: Effect of UV light10.1007/s10854-008-9604-6 ↗
29. Low temperature methane sensing by electrochemically grown and surface modified ZnO thin films10.1016/j.snb.2008.07.021 ↗
30. Self-Organized and high aspect ratio nanoporous zinc oxide prepared by anodization10.1149/1.2913094 ↗
31. Self-organized ZnO nanorods prepared by anodization of zinc in NaOH electrolyte10.1039/C6RA16995C ↗
32. Self-assembled arrays of ZnO stripes by anodization10.1016/j.elecom.2007.11.014 ↗
33. Formation of ZnO nanowires by anodization under hydrodynamic conditions for photoelectrochemical water splitting10.1016/j.surfcoat.2019.125197 ↗
34. Fabrication of ZnO nanotube layer on Zn and evaluation of corrosion behavior and bioactivity in view of biodegradable applications10.1016/j.apsusc.2019.07.165 ↗
35. Formation of ZnO nanowires during anodic oxidation of zinc in bicarbonate electrolytes10.1016/j.jelechem.2017.08.035 ↗
36. High aspect-ratio semiconducting ZnO nanowires formed by anodic oxidation of Zn foil and thermal treatment10.1016/j.mseb.2017.09.003 ↗
37. Rapid formation and evolution of anodized-zn nanostructures in NaHCO3 solution10.1149/2.0061610jss ↗
38. Rapid growth of zinc oxide nanotube–nanowire hybrid architectures and their use in breast cancer-related volatile organics detection10.1021/acs.nanolett.5b05280 ↗
39. Formation of ZnO nanowires during short durations of potentiostatic and galvanostatic anodization10.1016/j.cap.2013.04.015 ↗
40. Large-scale and rapid synthesis of ultralong zno nanowire films via anodization10.1021/jp9094744 ↗
41. Electrochemical synthesis and characterization of dark nanoporous zinc oxide films10.1016/j.electacta.2019.03.052 ↗
42. Electronic structure and morphology of dark oxides on zinc generated by electrochemical treatment10.1039/C3CP44714F ↗
43. Optimization of anodizing cycles for enhanced performance10.1002/sia.5222 ↗
44. Multi-wavelength Raman scattering of nanostructured Al-doped zinc oxide10.1063/1.4866322 ↗
45. Photoluminescence study of ZnO nanowires with Zn residue10.1016/j.jlumin.2012.11.018 ↗
46. Surface optical phonon Raman scattering in Zn∕ZnO core-shell structured nanoparticles10.1063/1.2199968 ↗
47. Fast fabrication of long-range ordered porous alumina membranes by hard anodization10.1038/nmat1717 ↗
48. Porous Anodic Aluminum Oxide: Anodization and templated synthesis of functional nanostructures10.1021/cr500002z ↗
49. The anodic oxidation of superimposed metallic layers: Theory10.1016/0013-4686(80)87157-X ↗
50. Alkaline aqueous electrolytes for secondary zinc-air batteries: An overview10.1002/er.3499 ↗