Publication: Emerging 2D/0D g-C<inf>3</inf>N<inf>4</inf>/SnO<inf>2</inf> S-scheme photocatalyst: New generation architectural structure of heterojunctions toward visible-light-driven NO degradation
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Issued Date
2021-10-01
Resource Type
ISSN
18736424
02697491
02697491
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2-s2.0-85107964419
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Mahidol University
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SCOPUS
Bibliographic Citation
Environmental Pollution. Vol.286, (2021)
Suggested Citation
Viet Van Pham, Diem Quynh Mai, Dai Phat Bui, Tran Van Man, Bicheng Zhu, Liuyang Zhang, Jariyaporn Sangkaworn, Jonggol Tantirungrotechai, Vichai Reutrakul, Thi Minh Cao Emerging 2D/0D g-C<inf>3</inf>N<inf>4</inf>/SnO<inf>2</inf> S-scheme photocatalyst: New generation architectural structure of heterojunctions toward visible-light-driven NO degradation. Environmental Pollution. Vol.286, (2021). doi:10.1016/j.envpol.2021.117510 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/77007
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Title
Emerging 2D/0D g-C<inf>3</inf>N<inf>4</inf>/SnO<inf>2</inf> S-scheme photocatalyst: New generation architectural structure of heterojunctions toward visible-light-driven NO degradation
Abstract
Enhancing and investigating the photocatalytic activity over composites for new models remains a challenge. Here, an emerging S-scheme photocatalyst composed of 2D/0D g-C3N4 nanosheets-assisted SnO2 nanoparticles (g-C3N4/SnO2) is successfully synthesized and used for degrading nitrogen oxide (NO), which causes negative impacts on the environment. A wide range of characterization techniques confirms the successful synthesis of SnO2 nanoparticles, g-C3N4 nanosheets, and 2D/0D g-C3N4/SnO2 S-scheme photocatalysts via hydrothermal and annealing processes. Besides, the visible-light response is confirmed by optical analysis. The S-scheme charge transfer was elucidated by Density-Functional Theory (DFT) calculation, trapping experiments, and electron spin resonance (ESR). We found that intrinsic oxygen vacancies of SnO2 nanoparticles and S-scheme charge transfer addressed the limitation of other heterojunction types. It is notable that compared pure SnO2 nanoparticles and g-C3N4, g-C3N4/SnO2 offered the best photocatalytic NO degradation and photostability under visible light with the removal of more than 40% NO at 500 ppb throughout the experiment. Benefiting from the unique structural features, the new generation architectural structure of S-scheme heterojunction exhibited potential photocatalytic activity and it would simultaneously act more promising for environmental treatment in the coming years.