Enhanced photo-induced charge separation and solar-driven photocatalytic activity of g-C3N4 decorated by SO42−

Zhong, Jianxin; Li, Jianzhang; Liu, Xinlu; Wang, Qizhao; Yang, Hao; Hu, Wei; Cheng, Chaozhu; Song, Jiabo; Li, Minjiao; Jin, Tian

doi:10.1016/j.mssp.2015.06.025

Cited by 23 publications

(5 citation statements)

References 48 publications

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“…The sample with a larger surface area can be exposed to more dye molecules, and the sample with a more negative zeta potential can make more chemical interactions with dye molecules [ 61 ]. The difference in adsorption behavior of MO and MB by CN-M500 in this study might be attributed to the nature of dyes and different pHs of solution [ 62 ]. Then, under the irradiation by visible light, the electrons at valence band (+1.6 eV vs. NHE) of g-C 3 N 4 can be migrated to conduction band (-1.1 eV vs. NHE) [ 63 ] and photogenerated electrons and holes are consequently produced.…”

Section: Resultsmentioning

confidence: 99%

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

Zhao

et al. 2015

PLoS ONE

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Graphitic carbon nitride (g-C3N4) used in this work was obtained by heating dicyandiamide and melamine, respectively, at different temperatures. The differences of g-C3N4 derived from different precursors in phase composition, functional group, surface morphology, microstructure, surface property, band gap and specific surface area were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-visible diffuse reflection spectroscopy and BET surface area analyzer, respectively. The photocatalytic discoloration of an active cationic dye, Methylene Blue (MB) under visible-light irradiation indicated that g-C3N4 derived from melamine at 500°C (CN-M500) had higher adsorption capacity and better photocatalytic activity than that from dicyandiamide at 500°C (CN-D500), which was attributed to the larger surface area of CN-M500. MB discoloration ratio over CN-M500 was affected by initial MB concentration and photocatalyst dosage. After 120 min reaction time, the blue color of MB solution disappeared completely. Subsequently, based on the measurement of the surface Zeta potentials of CN-M500 at different pHs, an active anionic dye, Methyl Orange (MO) was selected as the contrastive target pollutant with MB to reveal the synergic effect between adsorption and photocatalysis. Finally, the photocatalytic mechanism was discussed.

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Section: Resultsmentioning

confidence: 99%

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

Zhao

et al. 2015

PLoS ONE

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“…Many studies have been devoted to improve the photocatalytic oxidation activity by modified g-C 3 N 4 using copolymerization, metal and anion doping and applying bias voltage etc. (Han et al, 2014;Hu et al, 2014;Qi et al, 2016;Yan et al, 2014;Zhong et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Persulfate enhanced photocatalytic degradation of bisphenol A by g-C3N4 nanosheets under visible light irradiation

et al. 2017

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The enhancement of g-CN photocatalytic degradation of bisphenol A (BPA) via persulfate (PS) addition was investigated under visible light irradiation. The effects of various parameters on the BPA degradation were investigated, such as catalysts dosage, PS concentrations, initial pH value and BPA concentration. The results showed that g-CN nanosheets exhibited superior photocatalytic activity toward BPA degradation as compared with bulk g-CN. The addition of PS can further improve the g-CN photocatalytic performance for BPA degradation. With 5 mM PS, the degradation rate of BPA was increased from 72.5% to 100% at 90 min, and the corresponding first-order kinetic constants were increased from 0.0028 to 0.0140 min. The removal efficiency of BPA increased with the decrease of solution pH value. The active radicals in the reaction system were tested by electron spin resonance (ESR) and radicals quenching experiments. Instead of persulfate radicals' oxidation, it was proposed that the main active radicals for BPA degradation were superoxide radicals and the photogenerated holes.

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“…Recently, a polymeric semiconductor, graphite-like carbon nitride (g-C 3 N 4 ) has been reported as a "sustainable" photocatalyst for contaminant removal under visible light irradiation [3][4][5][6][7][8]. g-C 3 N 4 is composed of carbon and nitrogen only, and the optical band gap was determined to be 2.7 eV [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of acid on the photocatalytic degradation of rhodamine B over g-C3N4

Fang

et al. 2015

Applied Surface Science

103

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Enhanced photo-induced charge separation and solar-driven photocatalytic activity of g-C3N4 decorated by SO42−

Cited by 23 publications

References 48 publications

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

Synergic Effect between Adsorption and Photocatalysis of Metal-Free g-C3N4 Derived from Different Precursors

Persulfate enhanced photocatalytic degradation of bisphenol A by g-C3N4 nanosheets under visible light irradiation

Effect of acid on the photocatalytic degradation of rhodamine B over g-C3N4

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