Atomic layer deposition with rotary reactor for uniform hetero-junction photocatalyst, g-C3N4@TiO2 core–shell structures. Issue 57 (17th October 2019)

• Record Type: Journal Article
• Authors: Jang, Eunyong; Kim, Won Jun; Kim, Dae Woong; Hong, Seong Hwan; Ali, Ijaz; Park, Young Min; Park, Tae Joo
• Is Part Of: RSC advances. Volume 9:Issue 57(2019)
• Page Start: 33180
• Page End: 33186
• Publication Date: 2019-10-17
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra05958j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A heterojunction of TiO2 grown on g-C3 N4 particles is demonstrated using atomic layer deposition (ALD), equipped with a specifically designed rotary reactor for maintaining stable mechanical dispersion of g-C3 N4 particles during ALD. Abstract : A heterojunction of TiO2 grown on g-C3 N4 particles is demonstrated using atomic layer deposition (ALD), equipped with a specifically designed rotary reactor for maintaining stable mechanical dispersion of g-C3 N4 particles during ALD. The photocatalytic activity of the g-C3 N4 @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-C3 N4 and 2 times higher than that of g-C3 N4 @TiO2 composite prepared using a simple impregnation method. The ALD-TiO2 were well-dispersed on the g-C3 N4 surface, while TiO2 nanoparticles were agglomerated onto the g-C3 N4 in the g-C3 N4 @TiO2 composite prepared by the impregnation method. This created uniform and stable heterojunctions between the g-C3 N4 and TiO2, thus, enhancing the photocatalytic activity.