Metal-free photocatalytic degradation of 4-chlorophenol in water by mesoporous carbon nitride semiconductors

Cui, Yanjuan; Huang, Jianhui; Fu, Xianzhi; Wang, Xinchen

doi:10.1039/c2cy20036h

Cited by 240 publications

(126 citation statements)

References 51 publications

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“…However, there are few reports about the photocatalytic degradation of organic pollutants by g-C 3 N 4 except dyes. Very recently, mesoporous g-C 3 N 4 was employed to treat 4-chlorophenol and phenol in water by Wang et al [4]. But the porous g-C 3 N 4 involved complex synthetic procedure and template using.…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al thought that the degradation of organic pollutants over the g-C 3 N 4 was mainly attributed to reactive oxygen species produced by photogenerated electrons [4], and the role of VB holes was not mentioned. However, Yan et al [1] reported that the degradation of RhB over g-C 3 N 4 mainly originated from the photogenerated holes oxidation.…”

Section: Introductionmentioning

confidence: 99%

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

Chang

et al. 2013

Chemical Engineering Journal

280

116

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Chang

et al. 2013

Chemical Engineering Journal

280

116

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“…MCN showed the valence band (VB) and conduction band (CB) at 1.66 and À1.13 V, respectively [19], while the ZnPc showed HOMO and LUMO levels at 0.42 and À1.58 V, respectively. [30] When the photocatalyst is irradiated by the visible light (λ > 610 nm), electrons are excited from HOMO to LUMO of the ZnPc dye.…”

Section: Resultsmentioning

confidence: 99%

“…[18] The MCN has also been used to treat phenol, such as via adsorption [3] and photocatalytic reaction. [19,20] In order to utilise sunlight in the coming future, the modification of MCN to extend its light absorption to longer wavelength is highly required. In the case of hydrogen evolution reaction, the addition of magnesium phthalocyanines (MgPc) to the MCN was reported to increase the photocatalytic activity of MCN under longer wavelength of visible light region.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic removal of phenol under visible light irradiation on zinc phthalocyanine/mesoporous carbon nitride nanocomposites

Lee¹,

Lintang²,

Yuliati³

2013

Journal of Experimental Nanoscience

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A series of zinc phthalocyanine/mesoporous carbon nitride (ZnPc/MCN) nanocomposites was prepared successfully by an impregnation method. The addition of ZnPc (0.05-1.5 wt%) extended the absorption of MCN to longer visible light region without affected its structure. It was found that the photocatalytic activity of the nanocomposites for phenol removal depended on the loading amount of ZnPc. The photocatalytic activity of the MCN increased as the amount of ZnPc increased to 0.05 wt%, but further increase in the loading amount decreased the activity. It was suggested that the optimum amount of ZnPc acted as a good photosensitiser that effectively induced electron charge transfer and reduced the electron-hole recombination.

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“…Compared with TiO 2 , g-C 3 N 4 has an appropriate band gap (2.7 eV) for visible light absorption [17,18]. The capability of g-C 3 N 4 in decomposing organic under visible light had attracted great attention, such as methyl orange (MO) [19], RhB [20], 4-CP [21]. 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).…”

Section: Introductionmentioning

confidence: 99%

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

Chang

et al. 2014

Catalysis Today

131

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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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Metal-free photocatalytic degradation of 4-chlorophenol in water by mesoporous carbon nitride semiconductors

Cited by 240 publications

References 51 publications

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

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

Photocatalytic removal of phenol under visible light irradiation on zinc phthalocyanine/mesoporous carbon nitride nanocomposites

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

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