Fabrication of flexible sheets of Cu/CuO/Cu2O heterojunction nanodisks: A dominant performance of multiple photocatalytic sheets under natural sunlight
- Authors
- Uthirakumar, Periyayya; Devendiran, M.; Kim, Tae Hwan; Kalaiarasan, S.; Lee, In-Hwan
- Issue Date
- 10월-2020
- Publisher
- ELSEVIER
- Keywords
- Flexible sheet; CuO nanodisk; Cu/CuO/Cu2O heterojunction; Sunlight photocatalyst; Optical materials and properties; Nanocrystalline materials
- Citation
- MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, v.260
- Indexed
- SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
- Volume
- 260
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/52693
- DOI
- 10.1016/j.mseb.2020.114652
- ISSN
- 0921-5107
- Abstract
- Development of immobilized photocatalyst on a flexible sheet is an urgent need for wastewater treatment in industry. A facile method is established to fabricate flexible Cu/CuO/Cu2O heterojunction nanodisks. The existence of both phases of CuO and Cu2O are identified by XRD, oS and Raman spectroscopy. The combined CuO and Cu2O phases having different bandgaps are responsible for an improved photodegradation due to increased charge separation efficiency and an extended range of photoexcitation while decreasing recombination of photogenerated electrons and holes. For the first time, a single to several sheets of Cu/CuO/Cu2O heterojunction nanodisk are introduced to investigate the performance of photodegradation and continued to maximum of eight sheets. The superior photocatalytic performance of Cu/CuO/Cu2O heterojunction on rhodamine dye solution is observed and compared with recent reports related to the similar architecture. It is identified that the part of photoexcited electrons are consumed to oxidizes O-2 to generate superoxide radicals due to the closer oxidation potential between O-2/center dot O-2(-) and Cu2O, besides the transfer to the conduction band of CuO. Hence, the proposed flexible photocatalytic sheet benefits for the stable and continuous usage in a large-scale process to degrade toxic pollutants without sacrificing their photocatalytic activity.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.