Atomic layer deposition with rotary reactor for uniform hetero-junction photocatalyst, g-C3N4@TiO2 core-shell structuresopen access
- Authors
- Jang, Eunyong; Kim, Won Jun; Kim, Dea Woong; Hong, Seong Hwan; Ali, Ijaz; Park, Young Min; Park, Tae Joo
- Issue Date
- Oct-2019
- Publisher
- Royal Society of Chemistry
- Citation
- RSC Advances, v.9, no.57, pp.33180 - 33186
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC Advances
- Volume
- 9
- Number
- 57
- Start Page
- 33180
- End Page
- 33186
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/2088
- DOI
- 10.1039/c9ra05958j
- ISSN
- 2046-2069
- Abstract
- A heterojunction of TiO2 grown on g-C3N4 particles is demonstrated using atomic layer deposition (ALD), equipped with a specifically designed rotary reactor for maintaining stable mechanical dispersion of g-C3N4 particles during ALD. The photocatalytic activity of the g-C3N4@ALD-TiO2 core-shell composites was examined using the degradation of rhodamine B dye under visible light irradiation. The optimal composite with 5 ALD cycles of TiO2 exhibited the highest photocatalytic reaction rate constant among the composites with a range of ALD cycles from 2 to 200 cycles, which was observed to be 3 times higher than that of pristine g-C3N4 and 2 times higher than that of g-C3N4@TiO2 composite prepared using a simple impregnation method. The ALD-TiO2 were well-dispersed on the g-C3N4 surface, while TiO2 nanoparticles were agglomerated onto the g-C3N4 in the g-C3N4@TiO2 composite prepared by the impregnation method. This created uniform and stable heterojunctions between the g-C3N4 and TiO2, thus, enhancing the photocatalytic activity.
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