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.
journal_name
Environ Pollutjournal_title
Environmental pollution (Barking, Essex : 1987)authors
Van Pham V,Mai DQ,Bui DP,Van Man T,Zhu B,Zhang L,Sangkaworn J,Tantirungrotechai J,Reutrakul V,Cao TMdoi
10.1016/j.envpol.2021.117510keywords:
["G-C(3)N(4)","NO removal","Photocatalysis","S-scheme","SnO(2)"]subject
Has Abstractpub_date
2021-10-01 00:00:00pages
117510eissn
0269-7491issn
1873-6424pii
S0269-7491(21)01092-7journal_volume
286pub_type
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