Highly efficient visible light phenyl modified carbon nitride/TiO2 photocatalyst for environmental applications

Porcu, Stefania; Castellino, Micaela; Roppolo, Ignazio; Carbonaro, Carlo Maria; Palmas, Simonetta; Mais, Laura; Casula, Maria Francesca; Neretina, Svetlana; Hughes, Robert A.; Secci, Francesco; Ricci, Pier Carlo

doi:10.1016/j.apsusc.2020.147394

Cited by 20 publications

(21 citation statements)

References 38 publications

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“…At the same time, the photoinduced electrons are transferred to the nitro group of 4-nitrophenolate anion and at the end of the process, the amination takes place due to the absorption of H + generated from the oxidation of the hydrazine. In the PhCN structure with a band gap of 2.0 eV, the LUMO state is positioned at −0.43 eV vs. NHE, while the HOMO level is located at 1.57 eV vs. NHE [9]. Because of the weakening of the interaction between the planes and the enhanced contribution from the single layers structure of the pePhCN, this presents a larger band gap (2.38 eV).…”

Section: Resultsmentioning

confidence: 99%

“…Selective measurements in this direction are now ongoing and will be the main topic of future dedicated works. In the PhCN structure with a band gap of 2.0 eV, the LUMO state is positioned at −0.43 eV vs. NHE, while the HOMO level is located at 1.57 eV vs. NHE [9]. Because of the weakening of the interaction between the planes and the enhanced contribution from the single layers structure of the pePhCN, this presents a larger band gap (2.38 eV).…”

Section: Resultsmentioning

confidence: 99%

“…Despite that in the field of photocatalysis the use of semiconductor is a promising pathway for the degradation of environmental pollutants [6,7], g-C 3 N 4 does not represent a good standalone photocatalytic material for the high recombination rate of photogenerated electron-hole pairs. One possible strategy is the development of hybrid organic-inorganic materials, where the formation of chargetransfer complex at the interface between the organic donor (i.e., g-C 3 N 4 ) and inorganic acceptor (TiO 2 /WO 3 ) permits to increase the charge separation and, consequently, the photocatalytic activities [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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4-Nitrophenol Efficient Photoreduction from Exfoliated and Protonated Phenyl-Doped Graphitic Carbon Nitride Nanosheets

et al. 2021

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The photoreduction of 4-nitrophenol to 4-aminophenol by means of protonated and exfoliated phenyl-doped carbon nitride is reported. Although carbon nitride-based materials have been recognized as efficient photocatalysts, the photoreduction of 4-nitrophenol to 4-aminophenol is not allowed because of the high recombination rate of the photogenerated electron–hole pairs. In this paper, we show the morphology effects on the photoactivity in phenyl-doped carbon nitride. Structural (TEM, XRD, Raman) and optical characterization (absorption, photoluminescence) of the protonated and exfoliated phenyl-doped carbon nitride (hereafter pePhCN) is reported. The increased photocatalytic efficiency, with respect to the bulk material, is underlined by the calculation of the kinetic constant of the photoreduction process (2.78 × 10−1 min−1 and 3.54 × 10−3 min−1) for pePhCN and bulk PhCN, respectively. Finally, the detailed mechanism of the photoreduction process of 4-nitrophenol to 4-aminophenol by modified phenyl carbon nitride is proposed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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4-Nitrophenol Efficient Photoreduction from Exfoliated and Protonated Phenyl-Doped Graphitic Carbon Nitride Nanosheets

et al. 2021

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“…[18][19][20] In this direction, the palladium catalyzed Suzuki-Miyaura cross coupling reaction of aryl halides and phenyl boronic acid derivatives has been reported. [21][22][23][24][25][26][27] These protocols have several desirable features including mild reaction condition, the broad range of functional group tolerance, high air and moisture stability and high products yield with great regio-and stereoselectivity, has grown in popularity for synthesis of diversified biaryls with a broad range of applications. [28] The catalytic systems have played an indispensable and critical role in progressing Suzuki-Miyaura reaction.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of cellulose sulfate/Pd nanocatalsysts with remarkable efficiency for Suzuki–Miyaura reaction

Jokar

Naeimi

Bidhendi

2021

Applied Organom Chemis

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Heterogeneous catalysis with noble metal NPs are quite attractive due to unique surface chemistry and tuneable physicochemical properties. In this work, an efficient and simple method was used to synthesize palladium nanoparticles supported on cellulose sulfate. The resulted composites were characterized using various techniques such as X‐ray powder diffraction (XRD), FT‐IR, energy dispersive X‐ray spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) to verify the chemical structure and morphological properties of nanocatalysts. Next, the synthesized catalyst was utilized in Suzuki–Miyaura reaction between aryl bronic acid and different aryl halides. The catalysis reaction was carried out under atmospheric pressure where high efficiency, unique and simple work‐up procedure as well as excellent yields were achieved.

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“…Because PVP selectively binds to the planar defects at the perimeter of a nanostructure, a two-dimensional nanoplate evolves. With the only difference between this nanoplate synthesis and the spiral synthesis being the inclusion of pPhCN, 41,42 it is evident that this polymer plays a vital role. Figure 1 summarizes the results obtained from a 4 h plasmon-mediated synthesis during which 60 nm Au seeds were immersed in the aforementioned spiral growth solution and illuminated with an LED light source (Figure 1a).…”

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confidence: 99%

Sequential Symmetry-Breaking Events as a Synthetic Pathway for Chiral Gold Nanostructures with Spiral Geometries

et al. 2021

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Symmetry-breaking synthetic controls allow for nanostructure geometries that are counter to the underlying crystal symmetry of a material. If suitably applied, such controls provide the means to drive an isotropic metal along a growth pathway yielding a three-dimensional chiral geometry. Herein, we present a light-driven solution-based synthesis yielding helical gold spirals from substrate-bound seeds. The devised growth mode relies on three separate symmetry-breaking events ushered in by seeds lined with planar defects, a capping agent that severely frustrates early stage growth, and the Coulombic repulsion that occurs when identically charged growth fronts collide. Together they combine to advance a growth pathway in which planar growth emanates from one side of the seed, advances to encircle the seed from both clockwise and counterclockwise directions, and then, upon collision of the two growth fronts, sees one front rise above the other to realize a self-perpetuating three-dimensional spiral structure.

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Highly efficient visible light phenyl modified carbon nitride/TiO2 photocatalyst for environmental applications

Cited by 20 publications

References 38 publications

4-Nitrophenol Efficient Photoreduction from Exfoliated and Protonated Phenyl-Doped Graphitic Carbon Nitride Nanosheets

4-Nitrophenol Efficient Photoreduction from Exfoliated and Protonated Phenyl-Doped Graphitic Carbon Nitride Nanosheets

Preparation and characterization of cellulose sulfate/Pd nanocatalsysts with remarkable efficiency for Suzuki–Miyaura reaction

Sequential Symmetry-Breaking Events as a Synthetic Pathway for Chiral Gold Nanostructures with Spiral Geometries

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