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Visible light-driven g-C3N4@ZnO heterojunction photocatalyst synthesized via atomic layer deposition with a specially designed rotary reactor

Title
Visible light-driven g-C3N4@ZnO heterojunction photocatalyst synthesized via atomic layer deposition with a specially designed rotary reactor
Author
박태주
Keywords
Photocatalyst; Atomic layer deposition; Graphitic carbon nitride; ZnO; Visible light
Issue Date
2019-09
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED SURFACE SCIENCE, v. 487, Page. 206-210
Abstract
A g-C3N4@ZnO heterojunction is demonstrated using atomic layer deposition (ALD) of ZnO. A specially designed rotary reactor was used to maintain mechanical dispersion of g-C3N4 powder during the ALD process. Stable, uniform, and intimate heterojunctions between g-C3N4 and ZnO were produced, which induced effective charge separation; thus, the photocatalytic activity of the composites was enhanced. The photocatalytic performance was evaluated by the degradation of methylene blue dye. The photocatalytic reaction rate constant of the optimal g-C3N4@ZnO with five ALD cycles was five times and two times higher than those of pristine g-C3N4 and gC(3)N(4)@TiO2 composite, respectively. Furthermore, the photocorrosion of ZnO was inhibited by coupling with gC(3)N(4), which was confirmed through cyclic photo-degradation with three consecutive dye degradation tests. The synergistic effects of the g-C3N4@ZnO heterojunction, enhanced photocatalytic activity and photocorrosion resistance were proven.
URI
https://www.sciencedirect.com/science/article/pii/S0169433219313418https://repository.hanyang.ac.kr/handle/20.500.11754/122047
ISSN
0169-4332; 1873-5584
DOI
10.1016/j.apsusc.2019.05.035
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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