TY - JOUR
T1 - Sodium doping and 3D honeycomb nanoarchitecture
T2 - Key features of covalent triazine-based frameworks (CTF) organocatalyst for enhanced solar-driven advanced oxidation processes
AU - Zeng, Tao
AU - Li, Shuqi
AU - Shen, Yi
AU - Zhang, Haiyan
AU - Feng, Hongru
AU - Zhang, Xiaole
AU - Li, Lingxiangyu
AU - CAI, Zongwei
AU - Song, Shuang
N1 - Funding Information:
We thank the National Natural Science Foundation of China ( 21876156 and 21607130 ), the Zhejiang Provincial Natural Science Foundation of China ( LZ18B070001 and LGF18E080017 ), the Opening Project of State Key Laboratory of Environmental Chemistry and Ecotoxicology ( KF2016-29 ), and the Program for Changjiang Scholars and Innovative Research Team in University ( IRT13096 ) for financial support.
PY - 2019/11/15
Y1 - 2019/11/15
N2 - Herein, we designed a novel sodium-doped covalent triazine-based framework with a 3D honeycomb nanoarchitecture (H-CTF-Na) as visible-light-responsive organocatalyst to efficiently drive advanced oxidation processes (AOPs). Experimental and theoretical findings reveal that Na doping narrows the band gap by elevating the band edges and the 3D hierarchical nanocellular morphology improves light harvesting and electron transfer. With these merits, H-CTF-Na showed a photoactivity enhancement of 4.9–6.0-fold for the degradation of carbamazepine (CBZ) compared to those of pristine CTFs and g-C3N4 through peroxymonosulfate (PMS) activation under visible-light irradiation. The quenching and EPR results indicate that a synergistic effect between photooxidation (h+) and PMS activation (•OH and SO4•−) derived from the vigorous capture of photogenerated e− by PMS is responsible for the marked efficacy of H-CTF-Na/vis/PMS system. Moreover, this system exhibited excellent versatility in degrading other organics (such as various phenols and dyes) and good reusability in terms of five high-efficiency recycled uses.
AB - Herein, we designed a novel sodium-doped covalent triazine-based framework with a 3D honeycomb nanoarchitecture (H-CTF-Na) as visible-light-responsive organocatalyst to efficiently drive advanced oxidation processes (AOPs). Experimental and theoretical findings reveal that Na doping narrows the band gap by elevating the band edges and the 3D hierarchical nanocellular morphology improves light harvesting and electron transfer. With these merits, H-CTF-Na showed a photoactivity enhancement of 4.9–6.0-fold for the degradation of carbamazepine (CBZ) compared to those of pristine CTFs and g-C3N4 through peroxymonosulfate (PMS) activation under visible-light irradiation. The quenching and EPR results indicate that a synergistic effect between photooxidation (h+) and PMS activation (•OH and SO4•−) derived from the vigorous capture of photogenerated e− by PMS is responsible for the marked efficacy of H-CTF-Na/vis/PMS system. Moreover, this system exhibited excellent versatility in degrading other organics (such as various phenols and dyes) and good reusability in terms of five high-efficiency recycled uses.
KW - 3D honeycomb nanoarchitecture
KW - Oxidation degradation.
KW - Peroxymonosulfate
KW - Sodium-doped CTFs
KW - Visible-light harvesting
UR - http://www.scopus.com/inward/record.url?scp=85068498559&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2019.117915
DO - 10.1016/j.apcatb.2019.117915
M3 - Article
AN - SCOPUS:85068498559
SN - 0926-3373
VL - 257
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 117915
ER -