PMID- 37474028
OWN - NLM
STAT- MEDLINE
DCOM- 20230809
LR  - 20230809
IS  - 1879-1298 (Electronic)
IS  - 0045-6535 (Linking)
VI  - 338
DP  - 2023 Oct
TI  - Oxygen doped graphite carbon nitride as efficient metal-free catalyst for 
      peroxymonosulfate activation: Performance, mechanism and theoretical calculation.
PG  - 139539
LID - S0045-6535(23)01806-4 [pii]
LID - 10.1016/j.chemosphere.2023.139539 [doi]
AB  - In this study, oxygen-doped graphitic carbon nitride (g-C(3)N(4)), named 
      O-g-C(3)N(4), was successfully fabricated and characterized, and its performance 
      in activating peroxymonosulfate (PMS, HSO(5)(-)) for the removal of phenol, 
      2,4-dichlorophenol (2,4-DCP), bisphenol A (BPA), rhodamine B (RhB), reactive 
      brilliant blue (RBB) and acid orange 7 (AO7) was evaluated. The catalytic 
      performance of O-g-C(3)N(4) for AO7 removal increased by 14 times compared to 
      g-C(3)N(4). In the presence of 0.2 g L(-1) O-g-C(3)N(4), 3.5 mM PMS at natural pH 
      5.8, 96.4% of AO7 could be removed in 60 min, reduced toxicity of the treated AO7 
      solution was obtained, and the mineralization efficiency was 47.2% within 
      120 min. Density functional theory (DFT) calculations showed that the charge 
      distribution changed after oxygen doping, and PMS was more readily adsorbed by 
      O-g-C(3)N(4) with the adsorption energy (E(ads)) of -0.855 kcal/mol than that of 
      the pristine g-C(3)N(4) (E(ads): -0.305 kcal/mol). Mechanism investigation 
      implied that AO7 was primarily removed by the sulfate radicals (SO(4)(*-)) and 
      hydroxyl radicals ((*)OH) on the surface of O-g-C(3)N(4), but the role of singlet 
      oxygen ((1)O(2)) to AO7 elimination was negligible. The results of cyclic 
      experiments and catalyst characterization after reaction confirmed the favorable 
      catalytic activity and structural stability of O-g-C(3)N(4) particles. 
      Furthermore, the O-g-C(3)N(4)/PMS system was very resistant to most of the 
      environmental impacts, and AO7 removal was still acceptable in natural water 
      environment. This study may provide an efficient metal-free carbonaceous 
      activator with low dosage for PMS activation to remove recalcitrant organic 
      pollutants (ROPs).
CI  - Copyright (c) 2023 Elsevier Ltd. All rights reserved.
FAU - Xiang, Shaofeng
AU  - Xiang S
AD  - School of Environmental Studies, Hubei Provincial Engineering Research Center of 
      Systematic Water Pollution Control, China University of Geosciences, Wuhan, 
      430074, China. Electronic address: xiangshaof@outlook.com.
FAU - Lin, Yu
AU  - Lin Y
AD  - School of Environmental Studies, Hubei Provincial Engineering Research Center of 
      Systematic Water Pollution Control, China University of Geosciences, Wuhan, 
      430074, China.
FAU - Chang, Tongda
AU  - Chang T
AD  - School of Environmental Studies, Hubei Provincial Engineering Research Center of 
      Systematic Water Pollution Control, China University of Geosciences, Wuhan, 
      430074, China.
FAU - Mei, Bingrui
AU  - Mei B
AD  - School of Environmental Studies, Hubei Provincial Engineering Research Center of 
      Systematic Water Pollution Control, China University of Geosciences, Wuhan, 
      430074, China.
FAU - Liang, Yuhang
AU  - Liang Y
AD  - School of Environmental Studies, Hubei Provincial Engineering Research Center of 
      Systematic Water Pollution Control, China University of Geosciences, Wuhan, 
      430074, China.
FAU - Wang, Ziqian
AU  - Wang Z
AD  - School of Environmental Studies, Hubei Provincial Engineering Research Center of 
      Systematic Water Pollution Control, China University of Geosciences, Wuhan, 
      430074, China.
FAU - Sun, Wenwu
AU  - Sun W
AD  - School of Pharmaceutical Sciences, South-Central Minzu University, Wuhan, 430074, 
      China.
FAU - Cai, Chun
AU  - Cai C
AD  - School of Environmental Studies, Hubei Provincial Engineering Research Center of 
      Systematic Water Pollution Control, China University of Geosciences, Wuhan, 
      430074, China. Electronic address: caichun@cug.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20230718
PL  - England
TA  - Chemosphere
JT  - Chemosphere
JID - 0320657
RN  - 22047-43-4 (peroxymonosulfate)
RN  - 0 (graphitic carbon nitride)
RN  - 7782-42-5 (Graphite)
RN  - 534Q0F66RK (cyanogen)
RN  - S88TT14065 (Oxygen)
RN  - 0 (Peroxides)
RN  - 0 (Metals)
SB  - IM
MH  - *Graphite/chemistry
MH  - Oxygen
MH  - Peroxides/chemistry
MH  - Metals
OTO - NOTNLM
OT  - DFT
OT  - O-g-C(3)N(4)
OT  - PMS
OT  - Reaction mechanism
OT  - Recalcitrant organic pollutants
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2023/07/21 01:12
MHDA- 2023/08/09 06:43
CRDT- 2023/07/20 19:27
PHST- 2023/03/02 00:00 [received]
PHST- 2023/06/20 00:00 [revised]
PHST- 2023/07/15 00:00 [accepted]
PHST- 2023/08/09 06:43 [medline]
PHST- 2023/07/21 01:12 [pubmed]
PHST- 2023/07/20 19:27 [entrez]
AID - S0045-6535(23)01806-4 [pii]
AID - 10.1016/j.chemosphere.2023.139539 [doi]
PST - ppublish
SO  - Chemosphere. 2023 Oct;338:139539. doi: 10.1016/j.chemosphere.2023.139539. Epub 
      2023 Jul 18.