Walnut-like ZnO@Zn2TiO4 multicore-shell submicron spheres with a thin carbon layer: Fine synthesis, facile structural control and solar light photocatalytic application
- Authors
- Lim, Hyung-Seok; Lee, JaeSoul; Lee, Seunghyun; Kang, Yong Soo; Sun, Yang-Kook; Suh, Kyung-Do
- Issue Date
- Jan-2017
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Polymer; Hierarchical structure; Multicore-shell; Photocatalysis; Bandgap narrowing
- Citation
- ACTA MATERIALIA, v.122, pp.287 - 297
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACTA MATERIALIA
- Volume
- 122
- Start Page
- 287
- End Page
- 297
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/4833
- DOI
- 10.1016/j.actamat.2016.09.031
- ISSN
- 1359-6454
- Abstract
- In this study, we propose a fine fabrication method of walnut-like ZnO@Zn2TiO4 multicore-shell submicron spheres for the solar light-responsive photocatalysis. Poly(methacrylic acid/ethylene glycol dimethacrylate) [poly(MAA/EGDMA)] microspheres were used as sacrificial template to create the hierarchically-structured hybrid metal oxide spheres with a thin carbon layer. Heterogeneous multicore-shell structure like a walnut depends on the monomer ratio of poly(MAA/EGDMA) microspheres. The thin carbon layer formed on the surface of ZnO nano-grains can cause visible light response and effectively impede the recombination of photo-generated electron-hole. When the walnut-like ZnO@Zn2TiO4 multicore-shell submicron spheres with a thin carbon layer are tested as photocatalysts under solar light, the photodegradation of organic dye of above 93% is exhibited for 1 h due to the multiple light scattering originated from the unique structure and a coexistence of ZnO and Zn2TIO4.
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