2D Porous graphitic C3N4 nanosheets/Ag3PO4 nanocomposites for enhanced visible-light photocatalytic degradation of 4-chlorophenol

Ren, Yanlin; Zhao, Qidong; Li, Xinyong; Xiong, Wei; Tade, Moses O.

doi:10.1007/s11051-014-2532-x

Cited by 26 publications

(15 citation statements)

References 34 publications

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“…This resulted in reduced reflectance and, hence, increased absorption of light, reduced bandgap, and high photocatalytic activity, with the Ag 2 CrO 4 serving as an electron trap by promoting charge carrier separation. Therefore, coupling GCN with silver-based photocatalysts can create a synergistic effect by inhibiting the e-h pair recombination and improving the charge separation, thereby increasing the photocatalytic degradation of organic pollutants [20,22,36].…”

Section: Photocatalytic Degradation Of 4-cp By U-gcn/03ag2cro4 In Dif...mentioning

confidence: 99%

“…It was reported that GCN and modified GCN can produce reactive oxidative s (ROS) that can degrade organic pollutants under visible-light irradiation [20,26,27,3 results of the trapping experiments show that the active species, e − , h + , O2 . , and OH involved in the degradation of 4-CP and other chlorophenol compounds to the m ized products CO2, H2O, and HCl.…”

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

“…It was reported that GCN and modified GCN can produce reactive oxidative species (ROS) that can degrade organic pollutants under visible-light irradiation [20,26,27,36]. The results of the trapping experiments show that the active species, e − , h + , O 2…”

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

“…In Figure 4, there is an excitation of electrons on the U-GCN and Ag 2 CrO 4 upon irradiation from a visible-light source and the electrons move from their respective VB to CB. Due to potential differences, electrons migrate from the CB of GCN, and it is accepted on the CB of Ag 2 CrO 4 , where the Ag + is reduced to Ag 0 , while holes in the VB of GCN move to the VB of Ag 2 CrO 4 [20,51,52], leading to efficient charge separation. Subsequently, the accepted electrons by Ag 2 CrO 4 react with the dissolved oxygen in the aqueous medium to produce superoxide radicals, while the holes on the surface of the GCN react with water molecules to produce hydroxyl radicals.…”

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

“…Silver-based inorganics are among the most promising compounds used to improve the properties of GCN because of their photosensitivity and photocatalytic activity. Ren et al [20] observed that 4-CP degradation by GCN/Ag 3 PO 4 with a xenon lamp was 28 times faster than the method using pristine GCN. Deng et al [21] enhanced visible-light-driven photocatalytic E. coli disinfection by using GCN/AgBr.…”

Section: Introductionmentioning

confidence: 99%

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Visible-Light Driven Photocatalytic Degradation of 4-Chlorophenol Using Graphitic Carbon Nitride-Based Nanocomposites

Akintunde

et al. 2022

Catalysts

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4-chlorophenol (4-CP), a hydroxylated aromatic compound (HAC), is a recalcitrant and toxic organic pollutant found in industrial wastewater and various environmental media. In this paper, visible-light-activated photocatalysis using graphitic carbon nitride (GCN) was used to treat 4-CP in an aqueous media. Graphitic carbon nitride from different precursors (dicyanamide, urea, and melamine), as well as GCN/silver nanocomposites (AgBr, Ag3PO4, Ag2CrO4, and Ag), were successfully synthesized and characterized by BET, XRD, SEM, EDS, and UV-Vis DRS. The band gaps of the photocatalysts were estimated using the UV-Vis DRS characterization results and Tauc plots. The evaluation of the efficacy of the GCN-based catalysts in degrading 4-CP was conducted with different photoreactors such as a royal blue light-emitting diode (LED), a UV-A LED, LUZCHEM cool white lamps, and a solar simulator. The results showed that GCNs with royal blue LED can effectively degrade 4-CP from aqueous media. Among the different precursors, urea-derived GCN showed the best performance in degrading 4-CP due to its large surface area. GCN/0.3Ag2CrO4 nanocomposite showed a synergistic effect for the enhanced photocatalytic degradation of 4-CP. The degradation of 4-CP with a rate constant of 2.64 × 10−2 min−1 was achieved with a GCN/0.3Ag2CrO4 nanocomposite under royal blue LED irradiation.

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Section: Photocatalytic Degradation Of 4-cp By U-gcn/03ag2cro4 In Dif...mentioning

confidence: 99%

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

Section: Proposed Photocatalytic Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Visible-Light Driven Photocatalytic Degradation of 4-Chlorophenol Using Graphitic Carbon Nitride-Based Nanocomposites

Akintunde

et al. 2022

Catalysts

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Hybridized 2D Nanomaterials Toward Highly Efficient Photocatalysis for Degrading Pollutants: Current Status and Future Perspectives

Guan

You

et al. 2020

Small

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Organic pollutants including industrial dyes and chemicals and agricultural waste have become a major environmental issue in recent years. As an alternative to simple adsorption, photocatalytic decontamination is an efficient and energy‐saving technology to eliminate these pollutants from water environment, utilizing the energy of external light, and unique function of photocatalysts. Having a large specific surface area, numerous active sites, and varied band structures, 2D nanosheets have exhibited promising applications as an efficient photocatalyst for degrading organic pollutants, particularly hybridization with other functional components. The novel hybridization of 2D nanomaterials with various functional species is summarized systematically with emphasis on their enhanced photocatalytic activities and outstanding performances in environmental remediation. First, the mechanism of photocatalytic degradation is given for discussing the advantages/shortcomings of regular 2D materials and identifying the importance of constructing hybrid 2D photocatalysts. An overview of several types of intensively investigated 2D nanomaterials (i.e., graphene, g‐C3N4, MoS2, WO3, Bi2O3, and BiOX) is then given to indicate their hybridized methodologies, synergistic effect, and improved applications in decontamination of organic dyes and other pollutants. Finally, future research directions are rationally suggested based on the current challenges.

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Z-Scheme Ag3PO4/g-C3N4 Nanocomposites for Robust Cocatalyst-Free Photocatalytic H2 Evolution Under Visible Light Irradiation

et al. 2019

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2D Porous graphitic C3N4 nanosheets/Ag3PO4 nanocomposites for enhanced visible-light photocatalytic degradation of 4-chlorophenol

Cited by 26 publications

References 34 publications

Visible-Light Driven Photocatalytic Degradation of 4-Chlorophenol Using Graphitic Carbon Nitride-Based Nanocomposites

Visible-Light Driven Photocatalytic Degradation of 4-Chlorophenol Using Graphitic Carbon Nitride-Based Nanocomposites

Hybridized 2D Nanomaterials Toward Highly Efficient Photocatalysis for Degrading Pollutants: Current Status and Future Perspectives

Z-Scheme Ag3PO4/g-C3N4 Nanocomposites for Robust Cocatalyst-Free Photocatalytic H2 Evolution Under Visible Light Irradiation

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