Superior adsorption capacity of g-C3N4 for heavy metal ions from aqueous solutions

Shen, Congcong; Chen, Changlun; Wen, Tao; Zhao, Zhiwei; Wang, Xiangke; Xu, An‐Wu

doi:10.1016/j.jcis.2015.06.004

Cited by 200 publications

(72 citation statements)

References 50 publications

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“…The peak at 284.6 eV is typically assigned to the graphitic carbon or sp 2 CAN. The strong peak at 288.0 eV is assigned to NAC@N of the striazine ring (C 3 N 3 ) units or heptazine (C 6 N 7 ) units [22,31,32]. The spectrum of N 1s of the bulk-g-C 3 N 4 show three individual peaks, which were assigned to the sp 2 -hybridized nitrogen C@NAC (398.4 eV) [33], sp 2 N orbital CANAC in the triazine rings (398.8 eV) and tertiary nitrogen bonded to three carbon atoms NA(C) 3 (400.6 eV) [34][35][36].…”

Section: Resultsmentioning

confidence: 99%

Improvement of g-C3N4 photocatalytic properties using the Hummers method

Feng

Chen

Liu

et al. 2016

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 99%

Improvement of g-C3N4 photocatalytic properties using the Hummers method

Feng

Chen

Liu

et al. 2016

Journal of Colloid and Interface Science

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“…Thus, the synergy between adsorption and photocatalysis governs the quick decomposition of dye molecules. In addition to acting as an excellent photocatalyst, g-C 3 N 4 has been developed as a potential adsorbent with superior capacity of heavy metal ions [ 66 ]. Therefore, g-C 3 N 4 can be considered to treat the real industrial wastewater containing both organic contaminations and heavy metal ions, which would extend the practical application of g-C 3 N 4 .…”

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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“…IR absorption band at 1636 cm -1 in Fig. 1b can be ascribed to the C-N stretching modes, while four different strong vibrational features at 1247, 1315, 1423 and 1569 cm -1 correspond to the typical stretching modes of the C-N heterocycle [23,27,28]. The absorption band at 808 cm -1 can be attributed to the outof-plane ring bending modes of C-N heterocycles.…”

Section: Characterization Of the Synthesized Mpg-c 3 N 4 Samplesmentioning

confidence: 94%

“…The sharp and relatively weaker band around 2180 cm -1 can be assigned to the -C:N triple bond stretchings of cyano groups which are possibly formed at the defect sides or located at less ordered (i.e. amorphous-like) C x N y minority domains which are produced during the synthesis process [26,28,29].…”

Section: Characterization Of the Synthesized Mpg-c 3 N 4 Samplesmentioning

confidence: 99%

Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

et al. 2016

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A template-assisted synthetic method including the thermal polycondensation of guanidine hydrochloride (GndCl) was utilized to synthesize highly-organized mesoporous graphitic carbon nitride (mpg-C 3 N 4) photocatalysts. Comprehensive structural analysis of the mpg-C 3 N 4 materials were performed by XPS, XRD, FT-IR, BET and solid-state NMR spectroscopy. Photocatalytic performance of the mpg-C 3 N 4 materials was studied for the photodegradation of several dyes under visible and UV light illumination as a function of catalyst loading and the structure of mpg-C 3 N 4 depending on the polycondensation temperature. Among all of the formerly reported performances in the literature (including the ones for Degussa P25 commercial benchmark), currently synthesized mpg-C 3 N 4 photocatalysts exhibit a significantly superior visible light-induced photocatalytic activity towards rhodamine B (RhB) dye. Enhanced catalytic efficiency could be mainly attributed to the terminated polycondensation process, high specific surface area, and mesoporous structure with a wide pore size distribution. Keywords Graphitic-C 3 N 4 Á Carbon nitride Á UV-Vis light Á Photocatalytic degradation Á Organic dyes Electronic supplementary material The online version of this article (

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Superior adsorption capacity of g-C3N4 for heavy metal ions from aqueous solutions

Cited by 200 publications

References 50 publications

Improvement of g-C3N4 photocatalytic properties using the Hummers method

Improvement of g-C3N4 photocatalytic properties using the Hummers method

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

Photocatalytic Activity of Mesoporous Graphitic Carbon Nitride (mpg-C3N4) Towards Organic Chromophores Under UV and VIS Light Illumination

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