TY - JOUR
T1 - Visible light photocatalytic oxidation of NO using g-C3N4 nanosheets
T2 - stability, kinetics, and effect of humidity
AU - Stefa, Sofia
AU - Skliri, Evangelia
AU - Gagaoudakis, Emmanouil
AU - Kiriakidis, George
AU - Kotzias, Dimitrios
AU - Papagiannakopoulos, Panos
AU - Konsolakis, M.
AU - Mao, Samuel
AU - Binas, Vassilios
N1 - Publisher Copyright:
© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.
PY - 2024/6
Y1 - 2024/6
N2 - Heterogeneous photocatalysis is a promising technology for the degradation of environmental pollutants. In this work, g-C3N4 nanosheets were employed as a visible light photocatalyst to investigate the stability, kinetics and to understand the impact of humidity on the photocatalytic oxidation of nitric oxide (NO). Graphitic carbon nitride (g-C3N4) with unique physicochemical properties proves to be a promising photocatalytic material. Visible light active g-C3N4 nanosheets were successfully synthesized by thermal polycondensation of melamine followed by thermal exfoliation. Compared with the bulk carbon nitride, g-C3N4 nanosheets show significant NO removal efficiency (68%), followed by excellent stability after 5 cycles of photocatalytic oxidation under visible LED light illumination. Furthermore, photocatalytic oxidation of NO at various humidity levels revealed the significant role of humidity in photocatalytic NO removal. Finally, the initial uptake coefficients γ0,geo, and γ0,BET of NO on g-C3N4 nanosheets were determined to be 1.0 × 10− 5 and 1.58 × 10− 9, respectively, and were found to decrease with increasing humidity. It appears that the photocatalytic removal of NO happens primarily on the surface of the g-C3N4 nanosheet.
AB - Heterogeneous photocatalysis is a promising technology for the degradation of environmental pollutants. In this work, g-C3N4 nanosheets were employed as a visible light photocatalyst to investigate the stability, kinetics and to understand the impact of humidity on the photocatalytic oxidation of nitric oxide (NO). Graphitic carbon nitride (g-C3N4) with unique physicochemical properties proves to be a promising photocatalytic material. Visible light active g-C3N4 nanosheets were successfully synthesized by thermal polycondensation of melamine followed by thermal exfoliation. Compared with the bulk carbon nitride, g-C3N4 nanosheets show significant NO removal efficiency (68%), followed by excellent stability after 5 cycles of photocatalytic oxidation under visible LED light illumination. Furthermore, photocatalytic oxidation of NO at various humidity levels revealed the significant role of humidity in photocatalytic NO removal. Finally, the initial uptake coefficients γ0,geo, and γ0,BET of NO on g-C3N4 nanosheets were determined to be 1.0 × 10− 5 and 1.58 × 10− 9, respectively, and were found to decrease with increasing humidity. It appears that the photocatalytic removal of NO happens primarily on the surface of the g-C3N4 nanosheet.
KW - g-CN nanosheets
KW - Kinetic analysis
KW - LED visible-light photocatalysis
KW - NO removal
KW - Stability
UR - http://www.scopus.com/inward/record.url?scp=85195138604&partnerID=8YFLogxK
U2 - 10.1007/s00339-024-07605-5
DO - 10.1007/s00339-024-07605-5
M3 - Article
AN - SCOPUS:85195138604
SN - 0947-8396
VL - 130
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 6
M1 - 451
ER -