Photocatalytic degradation of 2,4,6-trichlorophenol over g-C3N4 under visible light irradiation

Ji, Huanhuan; Chang, Fei; Hu, Xuefeng; Qin, Wei; Shen, Jiaowen

doi:10.1016/j.cej.2012.12.033

Cited by 286 publications

(128 citation statements)

References 30 publications

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“…Over 50% total chromium was removed from the solution when Cr(VI) was completely reduced after 3 h. 3.8. Degradation intermediates and Cl − release of 2,4,6-TCP Four intermediates including 2,6-dichloro-3-hydroxy-1,4-benzoquinone (DCHB), 2,6-dichloro-1,4-benzoquinone (2,6-DCQ), 4,6-dichloro-catechol (4,6-DCC) and 2,3,4,6-tetrachlorophenol (TRCP) were found in the 2,4,6-TCP/g-C 3 N 4 photocatalytic system as seen in our previous report [23]. Apart from these four intermediates, other new high m/z peaks were also observed in the 2,4,6-TCP/Cr(VI)/g-C 3 N 4 system after 0.5 h photoreaction.…”

Section: Adsorption Of Chromium On G-c 3 Nmentioning

confidence: 50%

“…The formation of hydroxyl radicals in the presence of Cr(VI) may be responsible for the enhanced degradation rate of 2,4,6-TCP. On the other hand, O 2 •− are also contribute to the degradation of 2,4,6-TCP directly [23]. The photodegradation of 2,4,6-TCP in N 2 gas ambient well illustrated that 2,4,6-TCP could be degraded by VB holes when photogenerated electrons were scavenged by Cr(VI).…”

Section: Photoreaction Mechanismmentioning

confidence: 76%

“…Very recently, formate anion modified g-C 3 N 4 was developed to photoreduce Cr(VI) [22], where the conduction band (CB) electrons were reported to govern the photoreaction of Cr(VI). Meanwhile, our previous work also demonstrated that the g-C 3 N 4 was effective catalyst for 2,4,6-TCP oxidation and heavy metal (Cd 2+ , Cu 2+ , and Pb 2+ ) reduction [23]. However, the study for one-pot reduction of Cr(VI) and oxidation of 2,4,6-TCP has not been reported so far.…”

Section: Introductionmentioning

confidence: 94%

“…Several strong bands in the 1200-1650 cm −1 region correspond to the typical stretching modes of CN heterocycles. Additionally, the characteristic ring breath of the triazine units is found at 809 cm −1 [23].…”

Section: Structural Features Of the G-c 3 Nmentioning

confidence: 99%

“…In this study, g-C 3 N 4 catalyst was prepared using thermal condensation of dicyandiamide method [24] and strictly according to our previous report [23]. A 50 mL ceramic crucible containing 2 g dicyandiamide was introduced into a muffle furnace.…”

Section: Materials Preparation and Characterizationmentioning

confidence: 99%

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Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation

Chang

et al. 2014

Catalysis Today

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a b s t r a c tIn this study, a rapid reduction of Cr(VI) and degradation of 2,4,6-trichlorophenol (2,4,6-TCP) in a simultaneous manner was reported through the catalysis of g-C 3 N 4 under visible light ( > 420 nm) irradiation. The effects of initial concentration of reactants, dissolved O 2 and pH value were investigated systematically. It indicated that, under the optimized concentration, the Cr(VI) reduction and 2,4,6-TCP oxidation could be accomplished in couple of hours in the presence of g-C 3 N 4 . And also, the O 2 involvement and low pH value were able to significantly improve the removal rate of Cr(VI) and 2,4,6-TCP. In addition, the reaction mechanism was investigated through monitoring the reduced states of Cr(VI) and active oxygen intermediates formed during photoreaction by ESR and XPS, as well as determining the degradation products of 2,4,6-TCP by HPLC-MS. The results supported that the redox reactions of Cr(VI) and 2,4,6-TCP can be performed simultaneously via a synergistic oxidation-reduction mechanism in the presence of g-C 3 N 4 under visible light irradiation.

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Section: Adsorption Of Chromium On G-c 3 Nmentioning

confidence: 50%

Section: Photoreaction Mechanismmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 94%

Section: Structural Features Of the G-c 3 Nmentioning

confidence: 99%

Section: Materials Preparation and Characterizationmentioning

confidence: 99%

See 3 more Smart Citations

Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation

Chang

et al. 2014

Catalysis Today

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134

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Metal‐Free Organic Semiconductors for Visible‐Light‐Active Photocatalytic Water Splitting

Nishanthi

Rao

Kailasam

2018

Visible Light‐Active Photocatalysis

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Polymeric Photocatalysts Based on Graphitic Carbon Nitride

et al. 2015

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Semiconductor-based photocatalysis is considered to be an attractive way for solving the worldwide energy shortage and environmental pollution issues. Since the pioneering work in 2009 on graphitic carbon nitride (g-C3N4) for visible-light photocatalytic water splitting, g-C3N4 -based photocatalysis has become a very hot research topic. This review summarizes the recent progress regarding the design and preparation of g-C3N4 -based photocatalysts, including the fabrication and nanostructure design of pristine g-C3N4 , bandgap engineering through atomic-level doping and molecular-level modification, and the preparation of g-C3N4 -based semiconductor composites. Also, the photo-catalytic applications of g-C3N4 -based photocatalysts in the fields of water splitting, CO2 reduction, pollutant degradation, organic syntheses, and bacterial disinfection are reviewed, with emphasis on photocatalysis promoted by carbon materials, non-noble-metal cocatalysts, and Z-scheme heterojunctions. Finally, the concluding remarks are presented and some perspectives regarding the future development of g-C3N4 -based photocatalysts are highlighted.

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Photocatalytic degradation of 2,4,6-trichlorophenol over g-C3N4 under visible light irradiation

Cited by 286 publications

References 30 publications

Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation

Simultaneous photocatalytic Cr(VI) reduction and 2,4,6-TCP oxidation over g-C3N4 under visible light irradiation

Metal‐Free Organic Semiconductors for Visible‐Light‐Active Photocatalytic Water Splitting

Polymeric Photocatalysts Based on Graphitic Carbon Nitride

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