Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 565, Issue -, Pages 207-217Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.01.022
Keywords
Cu2O hollow structure; Active facets; Anionic dyes; Photodegradation; Adsorption; Pollutants
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Funding
- National Natural Science Foundation of China [U1663225, 21671155, 21805220]
- Natural Science Foundation of Hubei Province [2018CFB242, 2018CFA054]
- Major programs of technical innovation in Hubei [2018AAA012]
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We report the well-designed active {1 1 0} and {1 1 1} faceted Cu2O hollow nanospheres (Cu2O-HNs) for the quick removal of the high concentration pollutants in water. For the first time, these Cu2O-HNs combine the advantages of the active facets, hollow structure and nanostructures. The abundance of dangling Cu atoms in two active facets results in positively charged surface to effectively react with the negatively charged pollutants. The hollow structure provides the opportunity to take full use of these active sites. Consequently, the active faceted Cu2O-HNs demonstrate excellent adsorption and photodegradation capacities for high concentrated anionic dyes. The smallest Cu2O-HNs (similar to 100 nm) can adsorb similar to 90% of methyl blue (MB) (100 mg L-1) in 10 min and degrade similar to 92% of MB (100 mg L-1) in 10 min under visible-light. In particular, a film consisting of the smallest Cu2O-HNs can quickly remove high concentrated organic dyes and be reused after solar light irradiation for 10 min in air, showing the promising practical application for the removal of organic pollutants. (C) 2020 Elsevier Inc. All rights reserved.
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