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Facile Fabrication of Cu2O Nanobelts in Ethanol on Nanoporous Cu and Their Photodegradation of Methyl Orange

by Zhenhua Dan 1,2,*, Yulin Yang 1, Fengxiang Qin 3,*, Hao Wang 4 and Hui Chang 1,2
1
Tech Institute for Advanced Materials and College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
2
The Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 210009, China
3
School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
4
Institute for Materials Research, Tohoku University, Sendai 9808577, Japan
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(3), 446; https://doi.org/10.3390/ma11030446
Received: 6 January 2018 / Revised: 15 March 2018 / Accepted: 15 March 2018 / Published: 19 March 2018
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. View Full-Text
Keywords: Cu2O nanobelts; porous materials; Azo dye degradation; photocatalysts; ethanol Cu2O nanobelts; porous materials; Azo dye degradation; photocatalysts; ethanol
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Dan, Z.; Yang, Y.; Qin, F.; Wang, H.; Chang, H. Facile Fabrication of Cu2O Nanobelts in Ethanol on Nanoporous Cu and Their Photodegradation of Methyl Orange. Materials 2018, 11, 446.

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