TY - JOUR
T1 - Confining cobalt sites within the matrix of accordion-like tubular carbon nitride for peroxymonosulfate activation to produce sulfate radicals and desirable singlet oxygen
AU - Yin, Yu
AU - Fang, Rongrong
AU - Hu, Bing
AU - Wang, Qinxin
AU - Liu, Mengxuan
AU - Hannan Asif, Abdul
AU - Wang, Shaobin
AU - Sun, Hongqi
AU - Cui, Sheng
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2025/2/1
Y1 - 2025/2/1
N2 - Carbon nitride (C3N4) was fabricated as an accordion-like tubular morphology with hollow interior. The atomically dispersed Co sites were successfully confined within the accordion-like tubular C3N4 (atCN) matrix and coordinated with N in the Co-N4 configuration. The resulting Co-atCN catalysts were employed for peroxymonosulfate (PMS) activation towards 4-chlorophenol (4-CP) degradation. The optimal 2.9Co-atCN/PMS system took merely 10 min to completely degrade 4-CP (k = 0.426 min−1). While the accordion-like tubular C3N4 with semi-hollow interior (atCN-sh) was applied, the 2.9Co-atCN-sh/PMS system took 60 min on eliminating barely 72.0 % of 4-CP (k = 0.020 min−1). Moreover, 2.9Co-atCN/PMS exhibited excellent activity on the removal of diverse contaminants, for example, methyl orange (MO), methylene blue (MB), 2,4,6-trichlorophenol (TCP), and acetaminophen (ACT). The 100 % removal efficiency reached within only 5, 45, 45, and 20 min, respectively. In addition, good resistance to environmental interferences was also unveiled in the 2.9Co-atCN/PMS system. Electron paramagnetic resonance (EPR) and quenching tests showed that •OH, SO4• −, O2• − and 1O2 were produced in the reaction system of 2.9Co-atCN/PMS for 4-CP degradation, and the dominant oxygen species were determined to be not only conventional SO4• − but also favorable 1O2, and the latter contributed to the good resistance to environmental disturbances.
AB - Carbon nitride (C3N4) was fabricated as an accordion-like tubular morphology with hollow interior. The atomically dispersed Co sites were successfully confined within the accordion-like tubular C3N4 (atCN) matrix and coordinated with N in the Co-N4 configuration. The resulting Co-atCN catalysts were employed for peroxymonosulfate (PMS) activation towards 4-chlorophenol (4-CP) degradation. The optimal 2.9Co-atCN/PMS system took merely 10 min to completely degrade 4-CP (k = 0.426 min−1). While the accordion-like tubular C3N4 with semi-hollow interior (atCN-sh) was applied, the 2.9Co-atCN-sh/PMS system took 60 min on eliminating barely 72.0 % of 4-CP (k = 0.020 min−1). Moreover, 2.9Co-atCN/PMS exhibited excellent activity on the removal of diverse contaminants, for example, methyl orange (MO), methylene blue (MB), 2,4,6-trichlorophenol (TCP), and acetaminophen (ACT). The 100 % removal efficiency reached within only 5, 45, 45, and 20 min, respectively. In addition, good resistance to environmental interferences was also unveiled in the 2.9Co-atCN/PMS system. Electron paramagnetic resonance (EPR) and quenching tests showed that •OH, SO4• −, O2• − and 1O2 were produced in the reaction system of 2.9Co-atCN/PMS for 4-CP degradation, and the dominant oxygen species were determined to be not only conventional SO4• − but also favorable 1O2, and the latter contributed to the good resistance to environmental disturbances.
KW - Carbon nitride
KW - Peroxymonosulfate
KW - Singlet oxygen
KW - Sulfate
KW - Water decontamination
UR - http://www.scopus.com/inward/record.url?scp=85206679047&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2024.161535
DO - 10.1016/j.apsusc.2024.161535
M3 - Article
AN - SCOPUS:85206679047
SN - 0169-4332
VL - 681
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 161535
ER -