The preparation of Janus Cu(OH)2@Cu2O/Cu mesh and application in purification of oily wastewater. (June 2020)

• Record Type: Journal Article
• Authors: Hu, Luyang; Wang, Zhidan; Hu, Yue; Liu, Yuheng; Zhang, Shanmei; Zhou, Yufeng; Zhang, Yumin; Liu, Yin; Li, Benxia
• Is Part Of: Materials research bulletin. Volume 126(2020)
• Publication Date: 2020-06
• Subjects: Janus Cu(OH)2@Cu2O/Cu mesh -- Wettability -- Unidirectional water transport -- Oil-water separation -- Photocatalysis; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2020.110815
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: A Janus Cu(OH)2 @Cu2 O/Cu mesh was constructed, which successfully used for unidirectional liquid transport and in situ dual-functional water purification with high efficiency. Highlights: A Janus Cu(OH)2 @Cu2 O/Cu mesh with controllable wettability is synthesized. In situ reduced Cu2 O NPs deposit on the Cu(OH)2 to form a core-shell nanoneedle. A unidirectional water transport behavior is obtained by adjusting irradiation time. The mesh exhibits in situ dual-functional water purification with high efficiency. Abstract: A Janus Cu(OH)2 @Cu2 O/Cu mesh has been synthesized by UV irradiation and in situ hydrazine vapor reduction of superhydrophobic Cu(OH)2 /Cu mesh prepared by electrochemical anodization of Cu mesh followed by ODS modification. The Cu2 O nanoparticles derived from partial reduction of Cu(OH)2 deposit on the Cu(OH)2 to form a core-shell heterostructure, which endows the as-prepared mesh with micro/nanoscale hierarchical morphology. The wettability of different sides of the mesh can be easily controlled by tuning irradiation time and subsequent reduction. As a result, a unidirectional water penetration phenomenon can be obtained. In addition, based on the asymmetric wettability as well as the photocatalytic activity of the Cu(OH)2 @Cu2 O nanoneedle decorated mesh, the ultrahigh permeation flux and high separation efficiency with excellent in situ photocatalytic ability can also be achieved. This work may provide a rational and convenient strategy to construct Janus mesh with visible light photocatalysis toward in situ dual-functional water purification.