Journal
MATERIALS
Volume 11, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/ma11030446
Keywords
Cu2O nanobelts; porous materials; Azo dye degradation; photocatalysts; ethanol
Categories
Funding
- Natural Science Foundation of China [51671106]
- Natural Science Foundation of Jiangsu Province [BK20171424, BK20151536]
- International S&T Cooperation Program of China [2015DFA51430]
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Thin cupric oxide (Cu2O) nanobelts with width of few tens of nanometers to few hundreds of nanometers were fabricated in anhydrous ethanol on nanoporous copper templates that was prepared via dealloying amorphous Ti40Cu60 ribbons in hydrofluoric acid solutions at 348 K. The Cu2O octahedral particles preferentially form in the water, and nanobelts readily undergo the growth along the lengthwise and widthwise in the anhydrous ethanol. The ethanol molecules serve as stabilizing or capping reagents, and play a key role of the formation of two-dimensional Cu2O nanobelts. Cu atoms at weak sites (i.e., twin boundary) on the nanoporous Cu ligaments are ionized to form Cu2+ cations, and then react with OH to form Cu2O and H2O. The two-dimensional growth of Cu2O nanostructure is preferred in anhydrous ethanol due to the suppression of random growth of Cu2O nanoarchitectures by ethanol. Cu2O nanobelts have superior photodegradation performance of methyl orange, three times higher than nanoporous Cu.
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