Fabrication of compressible and recyclable macroscopic g-C3N4/GO aerogel hybrids for visible-light harvesting: A promising strategy for water remediation

Tang, Liang; Jia, Cheng-tao; Xue, Yuan-cheng; Li, Lin; Wang, Anqi; Xu, Gang; Liu, Ning; Wu, Minghong

doi:10.1016/j.apcatb.2017.07.053

Cited by 141 publications

(60 citation statements)

References 56 publications

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“…It implies that the P-TCN with microstructure may facilitatet he p-p stacking interactions between GQDs and P-TCN. [31] In the inset of Figure2e, we observet hat the GQDs have narrow particle size range from 2nmt o7nm, andt he average diameter is about 4.5 nm. It is noted that Figure 2f exhibits ad -spacing of 0.21 nm, corresponding to the (1100) crystal plane of graphene.…”

Section: Resultsmentioning

confidence: 84%

“…[29] The morphologies and microstructures of BCN, P-TCN, the GQD solution and P-TCN/GQDs-0. [31] In the inset of Figure2e, we observet hat the GQDs have narrow particle size range from 2nmt o7nm, andt he average diameter is about 4.5 nm. [30] Furthermore, the TEM images in Figure 2d,e exactly show the uniform distribution of GQDs on the surfaceo fP -TCN withouta ny obvious aggregation.…”

Section: Introductionmentioning

confidence: 84%

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Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution

et al. 2018

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Graphene quantum dots were modified on hexagonal tubular carbon nitride to form a composite photocatalyst by freeze‐drying technology. With an optimum loading amount of 0.15 wt % GQDs, the composite photocatalyst exhibits an improved visible‐light photocatalytic performance for hydrogen evolution (112.1 μmol h−1) that is about 9 times higher than that of bulk carbon nitride. During the photocatalytic reaction, graphene quantum dots play a photosensitizer role and an electron reservoir, which can extend the visible‐light response of the photocatalyst, decrease its band gap, and improve the separation efficiency of photoinduced electron–hole pairs. The graphene quantum dots can also absorb the long‐wavelength light and then emit the shorter wavelength light based on its upper transfer luminescence properties, which also contribute to the utilization of visible light. This finding demonstrates that the graphene quantum‐dot modification is a promising method to improve visible‐light photocatalytic activities for traditional photocatalysts.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 84%

Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution

et al. 2018

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“…For the composite samples, typical stretching modes of CN heterocycles were displayed at 1251, 1325, 1419, 1571, and 1639 cm −1 (Han et al 2016). In addition, the wide peaks between 3000 and 3500 cm −1 (N-H) and characteristic intense breathing mode of triazine units at 805 cm −1 were also observed (Tang et al 2017). These findings are consistent with the results reported previously (Pi et al 2015), which indicate the formation of g-C 3 N 4 and N-containing function groups on the biochar composite surface.…”

Section: Rr120 Removalmentioning

confidence: 95%

Facile one-step synthesis of graphitic carbon nitride-modified biochar for the removal of reactive red 120 through adsorption and photocatalytic degradation

Zheng

Yang

Zhang

et al. 2019

Biochar

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Converting waste biomass into value-added biochar has been considered as a green and sustainable strategy for resource management and pollution control. In this study, graphitic carbon nitride (g-C 3 N 4 ) modified biochars (BCs) were produced through one-pot pyrolysis of urea and hickory chips in differential ratios at 520 °C. The resulting BC/g-C 3 N 4 composites were evaluated in laboratory for their physicochemical, adsorptive, and photocatalytic properties. The characterization tests showed the successful synthesis of the BC/g-C 3 N 4 composites that introduced g-C 3 N 4 structure, N-containing surface functional groups, reduced surface area, and better thermal stability to the biochar. After modification, the BC/g-C 3 N 4 composites showed better adsorption ability to reactive red 120 (RR120) than the pristine BC, due to the strong electrostatic attrition between N-containing functional groups of g-C 3 N 4 on biochar surface and anionic RR120. The BC/g-C 3 N 4 composites also inherited g-C 3 N 4 's photocatalytic activity, which is visible light responsive to generate free radicals for RR120 degradation. In addition, the composites with higher urea modification ratios were more effective in the degradation of RR120. Overall, this study demonstrates the feasibility and promising potential of combining biochar and photocatalyst for the removal of aqueous dye. Because of the synergistic adsorption and photodegradation ability, BC/g-C 3 N 4 composites present a novel and cost-effective solution for the removal of aqueous dye and other photodegradable contaminants under natural conditions.

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“…Moreover, compared with other catalysts, carbon aerogels exhibit wonderful contaminant adsorption and enrichment capacity, which extremely enhances the catalytic performance. Therefore, carbon aerogels are frequently used as photocatalysts or electrocatalysts for pollutant removal in water or air , , . For aquatic environments, carbon aerogels are mainly used for organic pollutant oxidation and ion reduction.…”

Section: Applications Based On Catalysismentioning

confidence: 99%

“…For aquatic environments, carbon aerogels are mainly used for organic pollutant oxidation and ion reduction. For example, Tang et al fabricated a compressible g‐C 3 N 4 /GO aerogel with recyclability and used it as photocatalyst for degradation of dyes (methyl orange (MO) and methylene blue (MB)) and reduction of bromates. The results indicated that g‐C 3 N 4 was evenly dispersed over the GO by π–π stacking, and the addition of GO significantly increased the photocatalytic activity.…”

Section: Applications Based On Catalysismentioning

confidence: 99%

Carbon Aerogels for Environmental Clean‐Up

Gan

Fan

et al. 2019

Eur J Inorg Chem

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Carbon aerogels are a fascinating three-dimensional (3D) monolithic porous material with remarkable physicochemical properties, including low density, large surface area, abundant pore structure, high electrical conductivity, chemical stability, environmental compatibility, adjustable surface chemistry, as well as controllable structural features. These properties endow carbon aerogels with excellent adsorption and catalytic performance. Therefore, they are widely applied in environmental chemistry for removing pollutants like oils, toxic organic solvents, dyes, heavy metal ions in aquatic environments, and vol- [a] Minireview Carbon aerogels show wonderful adsorption and catalytic performance because of the microscopic properties of carbon nanomaterials and the macroscopic structure of the gel. In addi-Guoqiang Gan received his master′s degree in 2016, and since then, he has studied environmental engineering at Dalian University of

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Fabrication of compressible and recyclable macroscopic g-C3N4/GO aerogel hybrids for visible-light harvesting: A promising strategy for water remediation

Cited by 141 publications

References 56 publications

Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution

Graphene Quantum‐Dot‐Modified Hexagonal Tubular Carbon Nitride for Visible‐Light Photocatalytic Hydrogen Evolution

Facile one-step synthesis of graphitic carbon nitride-modified biochar for the removal of reactive red 120 through adsorption and photocatalytic degradation

Carbon Aerogels for Environmental Clean‐Up

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