TY  - JOUR
ID  - scholars11217
KW  - Carbon; Catalysts; Chemical activation; Doping (additives); Ionization of gases; Nitrogen removal; Paramagnetic resonance; Porous materials; Rate constants; Specific surface area
KW  -  Bio-waste; Carbocatalyst; Peroxymonosulfate; Porous carbons; Singlet oxygen
KW  -  Microcomputers
N2  - In this study, N-doped porous carbons (Nâ??doped PCs) were prepared from various biowastes by thermal annealing method under inert atmosphere and compared. Due to the differences in the textural characteristics and w/w inorganic content, the choice of biowaste influenced the intrinsic (extent of N doping,  graphitic N) and extrinsic (specific surface area) properties of the resultant N-doped PC. The Nâ??doped PCs were employed to activate peroxymonosulfate (PMS) for bisphenol A (BPA) removal. It was found that the Nâ??doped PCs prepared from spent coffee ground (PCâ??SC) and saw dust, with higher at. graphitic N (44â??46 at.) and specific surface area (>400 m2 gâ??1), performed significantly better (apparent rate constant, kapp = 0.072â??0.087 minâ??1) than those prepared from banana peel, orange peel and dried leaves (kapp < 0.046 minâ??1). The PCâ??SC was selected to investigate the effects of catalyst loading and PMS dosage on BPA degradation, and the results indicated that increasing the catalyst loading is 1.5 times more beneficial than increasing the PMS dosage. The reactive oxygen species (ROS) was studied using chemical scavengers and electron paramagnetic resonance spectrometer which indicated that the 1O2 (induced from the interaction between the PCâ??SC and PMS) was the dominant ROS in the PCâ??SC/PMS system. The BPA degradation intermediates were also identified using the LC/MS/MS system and the possible BPA degradation pathways are proposed. This study conspicuously shows that biowastes can be used as a sustainable resource to produce PC for application in environmental redox catalysis. However, the right selection of biowaste is crucial to produce high-performance PC for PMS activation. © 2019 Elsevier B.V.
Y1  - 2019///
VL  - 374
A1  - Oh, W.-D.
A1  - Veksha, A.
A1  - Chen, X.
A1  - Adnan, R.
A1  - Lim, J.-W.
A1  - Leong, K.-H.
A1  - Lim, T.-T.
JF  - Chemical Engineering Journal
UR  - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85066804236&doi=10.1016%2fj.cej.2019.06.001&partnerID=40&md5=ece4aeef96ab8a6d98f302f1e220dd22
AV  - none
SP  - 947
TI  - Catalytically active nitrogen-doped porous carbon derived from biowastes for organics removal via peroxymonosulfate activation
N1  - cited By 71
PB  - Elsevier B.V.
SN  - 13858947
EP  - 957
ER  -