Phenol Degradation by a Nonpulsed Diaphragm Glow Discharge in an Aqueous Solution

Liu, Yong Jun; Jiang, Xiaolei

doi:10.1021/es050875j

Cited by 101 publications

(79 citation statements)

References 27 publications

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“…The formed organic acids were further degraded to CO 2 and H 2 O. This is consistent with the previous studies on phenol degradation by the • OH attack [39,40]. The proposed phenol photodegradation pathways were illustrated in Fig.…”

Section: Photocatalytic Performance Of G-c 3 N 4 /Cds Compositessupporting

confidence: 89%

Carbon dots decorated graphitic carbon nitride as an efficient metal-free photocatalyst for phenol degradation

Zhang

Zhao

Geng

et al. 2016

Applied Catalysis B: Environmental

330

106

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a b s t r a c tEnvironment-friendly metal-free photocatalysts represent a promising alternative to conventional metal-based semiconductors. In this report, a carbon dots (CDs) decorated graphitic carbon nitride (g-C 3 N 4 ) photocatalyst was synthesized via a facile impregnation-thermal method. Under visible light irradiation, a very low CDs content of 0.5 wt% in the g-C 3 N 4 /CDs composite resulted in a 3.7 times faster reaction rate for phenol photodegradation than pristine g-C 3 N 4 . Spectroscopic and photoelectrochemical characterizations revealed that impregnation of CDs into g-C 3 N 4 not only enhanced the production of photogenerated electron-hole pairs by extending the visible light absorption region due to the upconverted photoluminescence character of CDs, but also facilitated electron-hole separation by band alignment in the g-C 3 N 4 /CDs junction, thus yielded more holes,• O 2 and • OH radicals to promote phenol degradation. These results highlight the potential application of sustainable metal-free photocatalysts in water purification.

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Section: Photocatalytic Performance Of G-c 3 N 4 /Cds Compositessupporting

confidence: 89%

Carbon dots decorated graphitic carbon nitride as an efficient metal-free photocatalyst for phenol degradation

Zhang

Zhao

Geng

et al. 2016

Applied Catalysis B: Environmental

330

106

View full text Add to dashboard Cite

show abstract

“…The feature of GDP is that various active species such as hydrogen peroxide and hydroxyl radicals were formed with strong deviation of those expected on Faraday's law [4,6]. Recent studies have shown that phenols [7][8][9][10][11], benzoic acid [12], aniline [13] and dyes [14,15] etc. could be exhaustively degraded by GDP.…”

mentioning

confidence: 99%

Efficient Degradation of Nitrobenzene Induced by Glow Discharge Plasma in Aqueous Solution

Wang

Jiang

Liu

2007

Plasma Chem Plasma Process

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The oxidative degradation of nitrobenzene (NB) induced by gaseous glow discharge plasma in contact with aqueous solution was investigated. The experimental results indicated that NB removal obeyed first-order kinetics under certain applied currents. The major degradation byproducts such as nitrophenols, phenol, 1,3-dinitrobenzene and carboxylic acids have been detected. The distribution of nitrophenols follows the order o-> p-> m-and oxalic, formic and acetic acids are major carboxylic intermediates. The eventual products were nitrate ion and carbon dioxide. During the treatment, a large amount of hydrogen peroxide was produced. Addition of ferrous or ferric ions into the solution greatly enhanced the degradation rate due to Fenton's reaction. The energy efficiencies of NB removal and hydrogen peroxide formation were compared with those of other discharges. Hydroxyl radicals were shown to be the most likely species responsible for NB degradation

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“…In a previous work of phenol decomposition [15], it has been pointed out that there is a synergistic effect between the pH value and the decomposition reaction and that the decomposition reaction is enhanced when the pH is shifted to acidic. The present experiment, however, shows that the decomposition rate of the acetic acid is slightly low at low pH value (~4) and increases with increasing the pH value, suggesting that the synergistic effect is not the case in this experiment.…”

Section: Resultsmentioning

confidence: 99%

Refractory Organic Solute Decomposition in Water using Microwave Plasma

Ishijima

Saito

Sugihara

et al. 2011

Trans. Mat. Res. Soc. Japan

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Microwave excited plasma source with slot antenna in water is a novel plasma applicable to materials processing in liquid. In order to apply this microwave plasma source to a practical use for solute decomposition, it is necessary to evaluate the decomposition efficiency for refractory organic solutes and understand the decomposition process of solution as well. In this paper, the microwave plasma treatment was demonstrated through decomposition of refractory organic solutes such as acetic acid, polyvinyl alcohol (PVA), and 4-chloro-2-methylphenoxy acetic acid (MCPA) in aqueous solutions. Total organic carbon concentration and high-performance liquid chromatography measurements revealed that the refractory organic substances such as acetic acid, PVA, and MCPA were decomposed by microwave plasma. Intermediate products of MCPA were investigated by gas chromatography coupled to a mass spectrometry and ion chromatograph during MCPA degradation using microwave excited plasma.

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Phenol Degradation by a Nonpulsed Diaphragm Glow Discharge in an Aqueous Solution

Cited by 101 publications

References 27 publications

Carbon dots decorated graphitic carbon nitride as an efficient metal-free photocatalyst for phenol degradation

Carbon dots decorated graphitic carbon nitride as an efficient metal-free photocatalyst for phenol degradation

Efficient Degradation of Nitrobenzene Induced by Glow Discharge Plasma in Aqueous Solution

Refractory Organic Solute Decomposition in Water using Microwave Plasma

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