Synthesis of porous reduced graphene oxide as metal-free carbon for adsorption and catalytic oxidation of organics in water

Peng, Wenchao; Liu, Shizhen; Sun, Hongqi; Yao, Yunjin; Zhi, Linjie; Wang, Shaobin

doi:10.1039/c3ta10592j

Cited by 193 publications

(113 citation statements)

References 19 publications

(32 reference statements)

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“…1 [180, 182, 183]; (b) The strong 24 covalent bond interactions (Co-O-C) with Co 3 O 4 contributes to the excellent 25 dispersion of Co 3 O 4 nanoparticles and favors the formation of CoOH + (Fig. 5) [182, 26 184]; (c) rGO with a certain reductive degree could also serve as a catalyst to activate 27 PMS when it possesses a proper amount of electron-rich groups (such as ketonic 28groups) or enriched defects as Lewis basic sites[185,186]; (d) Their extraordinary 29 adsorption capacity of GO (rGO) significantly promotes the target substance to the catalyst surface and approach the active oxidants.…”

mentioning

confidence: 99%

Cobalt-catalyzed sulfate radical-based advanced oxidation: A review on heterogeneous catalysts and applications

Long

2016

Applied Catalysis B: Environmental

1,730

378

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mentioning

confidence: 99%

Cobalt-catalyzed sulfate radical-based advanced oxidation: A review on heterogeneous catalysts and applications

Long

2016

Applied Catalysis B: Environmental

1,730

378

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“…It was worth noticing that the activation of persulfate by various carbonaceous materials, such as activated carbon [18], reduced graphene oxide (rGO) [19][20][21][22][23], carbon nanotubes (CNTs) [24][25][26][27][28], ordered mesoporous carbon (OMC) [29] and nanodiamond [30,31], had attracted much attention because of their environmental-friendly and high efficiency. Due to its high surface area, accessible mesopores and large pore volume, OMC had been applied in many areas such as adsorbents [32], catalysts and supports [33,34], and electrode materials [35].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous degradation of refractory pollutants by peroxymonosulfate activated by CoOx-doped ordered mesoporous carbon

Wang

Cao

Zhao

2017

Chemical Engineering Journal

268

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h i g h l i g h t sCo-OMC catalyst possesses high specific surface area and uniform pore size. /g) and uniform pore size distribution ($4 nm) because of its ordered mesoporous structure. 20 mg/L phenol could be completely degraded with the addition of 0.1 g/L Co-OMC and 1 mM PMS in 60 min. In addition, the catalytic activity of Co-OMC for PMS activation was much higher than some efficient catalysts such as Co 3 O 4 , CoFe 2 O 4 and OMC. Besides, Co-OMC showed remarkable efficiency for the destruction of seven representative pollutants. Results indicated that the catalytic activity of Co-OMC increased with the calcination temperature increasing, which may be caused by the higher defect degree at higher calcination temperature. In addition, various practical parameters such as PMS concentration, initial pH, anion, nature organic matter and reaction temperature were systematically investigated using phenol as the target pollutant.

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“…These results indicate the adsorption occurred on the Al-Mg/GO composites through a multilayer adsorption mechanism that can be quantitatively depicted by Eq. 3 [52,53]. The multilayer adsorption of these contaminates has been reported for different adsorbents [54][55][56][57].…”

Section: Adsorption Isotherms and Kineticsmentioning

confidence: 99%

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

Ahmadi

Yang

Jones

et al. 2018

Adv Compos Hybrid Mater

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Separation-free Al-Mg/graphene oxide (Al-Mg/GO) composites were synthesized by facile one-pot hydrothermal treatment and examined for adsorptive removal of representative contaminants (phosphate, copper (II), and Diclofenac (DCF)) in urban stormwater runoff. The Al-Mg/GO composites exhibited good adsorption capacity for all three contaminants. The adsorption isotherm and kinetics are well described by Freundlich model and pseudo-second-order model, respectively. Further, adsorption of phosphate and DCF favored acidic conditions while an opposite trend was observed for copper (II), which can be ascribed to the change of surface charge of the composites at different pH. The presence of different ions commonly present in environmental matrices (humic acid, bicarbonate, and sulfate) exhibited different effects on the contaminants' removal. Bicarbonate inhibited phosphate and DCF adsorption but promoted copper (II) removal. Copper (II) adsorption was also increased through chemical complexation and electrostatic attraction as a result of humic acid/sulfate adsorption on the adsorbents. The adsorption mechanisms include electrostatic interaction for all three contaminants, Lewis acid-base interactions and surface complexation for phosphate, π-π interactions for DCF, and cation-π interactions for copper (II). More than 75% adsorption capacities were maintained after 4 cycles of adsorption/desorption/regeneration, indicating good reusability. The Al-Mg/GO composites show great potential as a multifunctional adsorptive material for urban stormwater management.

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Synthesis of porous reduced graphene oxide as metal-free carbon for adsorption and catalytic oxidation of organics in water

Cited by 193 publications

References 19 publications

Cobalt-catalyzed sulfate radical-based advanced oxidation: A review on heterogeneous catalysts and applications

Cobalt-catalyzed sulfate radical-based advanced oxidation: A review on heterogeneous catalysts and applications

Heterogeneous degradation of refractory pollutants by peroxymonosulfate activated by CoOx-doped ordered mesoporous carbon

Separation-free Al-Mg/graphene oxide composites for enhancement of urban stormwater runoff quality

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