Construction of reduced graphene oxide-supported Ag–Cu2O composites with hierarchical structures for enhanced photocatalytic activities and recyclability

Reduced graphene oxide-SnSe (rGO-SnSe) nanohybrids were synthesized with a solution chemical reaction at room temperature. The nanohybrids were characterized by various techniques for their microstructural and photocatalytic activities in photodegradation of alkaline dye malachite green in the water. The effects of rGO/SnSe ratio, initial solution pH, and H2O2 concentration on the photodegradation efficiency were studied. The SnSe nanocrystallines with nanoscale size and narrow bandgap were formed and uniformly adhered on the rGO surface. Raman analysis confirmed the reduction of GO. The experimental results indicated that the nanohybrids showed excellent sunlight-excited photocatalytic activity in degrading malachite green in the water. Significantly, the nanohybrids showed remarkable photo-Fenton-like catalytic activity. The photodegradation rates of the hybrids were greater than that of SnSe nanoparticles, increased with increasing rGO/SnSe ratio, and related to operation parameters. High photocatalytic activities were ascribed to the efficiency interface effect that was confirmed by the calculations of band energy level and photoconductivity. The TOC measurement further verified the photodegradation results. The nanoparticles and nanohybrids also showed excellent reusability.

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Incorporation of reduced graphene oxide into faceted flower-like {001} TiO 2 for enhanced photocatalytic activity

Royal Society Open Science ◽

10.1098/rsos.180613 ◽

2018 ◽

Vol 5 (8) ◽

pp. 180613 ◽

Cited By ~ 3

Author(s):

Haijin Liu ◽

Peiyao Li ◽

Haokun Bai ◽

Cuiwei Du ◽

Dandan Wei ◽

...

Keyword(s):

Electron Microscopy ◽

Photocatalytic Activity ◽

Graphene Oxide ◽

Visible Light ◽

Reduced Graphene Oxide ◽

Theoretical Calculations ◽

X Ray ◽

Transmission Electron ◽

Reduced Graphene ◽

Photocatalytic Activities

Anatase TiO 2 with {001} facets is much more active than that with {101} facets, which has been verified via experiments and theoretical calculations. Graphene has garnered much attention since it was initially synthesized, due to its unique properties. In this study, reduced graphene oxide (RGO)/{001} faceted TiO 2 composites were fabricated via a solvothermal method. The composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectrophotometry, photoluminescence and Raman analysis. The results revealed that the graphene oxide was reduced during the preparation process of the {001} faceted TiO 2 , and combined with the surface of {001} TiO 2 . The photocatalytic activities of the composites were evaluated through the degradation of basic violet, under both white light ( λ > 390 nm) and visible light ( λ = 420 nm) irradiation. The results indicated that the photocatalytic activities of the {001} faceted TiO 2 were significantly improved following the incorporation of RGO, particularly under visible light irradiation. Theoretical calculations showed that the band structure of the {001} faceted TiO 2 was modified via graphene hybridization, where the separation of photoinduced electron–hole pairs was promoted; thus, the photocatalytic activity was enhanced.

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Fabrication of N-doped Reduced Graphene Oxide/Ag3PO4 Nanocomposite with Excellent Photocatalytic Activity for the Degradation of Organic Pollutants

NANO ◽

10.1142/s1793292017500138 ◽

2017 ◽

Vol 12 (01) ◽

pp. 1750013 ◽

Cited By ~ 6

Author(s):

Longhai Feng ◽

Lirong Kong ◽

Zhenyuan Ji ◽

Yi Wang ◽

Xiaoping Shen ◽

...

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Photocatalytic Performance ◽

Organic Pollutant ◽

Charge Carriers ◽

Simulated Solar Light ◽

Solar Light Irradiation ◽

Reduced Graphene ◽

Excellent Photocatalytic Activity

An efficient N-doped reduced graphene oxide (N-RGO)/Ag3PO4 nanocomposite with enhanced photocatalytic activity has been prepared through a facile solution-based approach. Since N-RGO could offer more sites for the anchoring of Ag3PO4 nanoparticles, and effectively promote the charge carriers separation and transfer due to its high electrical conductivity, the photocatalytic activity of N-RGO/Ag3PO4 nanocomposite is much higher than bare Ag3PO4 and N-RGO in the degradation of phenol pollutant under simulated solar light irradiation. The mechanism for the photocatalytic process was also investigated. The excellent photocatalytic performance makes the N-RGO/Ag3PO4 nanocomposite a promising photocatalyst for organic pollutant treatment.

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One-step in situ synthesis of CeO2nanoparticles grown on reduced graphene oxide as an excellent fluorescent and photocatalyst material under sunlight irradiation

Physical Chemistry Chemical Physics ◽

10.1039/c5cp04457j ◽

2016 ◽

Vol 18 (16) ◽

pp. 11157-11167 ◽

Cited By ~ 52

Author(s):

Sachin Kumar ◽

Animesh K. Ojha ◽

Donfack Patrice ◽

Brajesh S. Yadav ◽

Arnulf Materny

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

In Situ Synthesis ◽

Sunlight Irradiation ◽

Reduced Graphene ◽

Excellent Photocatalytic Activity ◽

One Step

The rGO–CeO2nanocomposite exhibited excellent photocatalytic activity under sunlight irradiation.

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Ionic liquid-assisted hydrothermal synthesis of Bi2WO6–reduced graphene oxide composites with enhanced photocatalytic activity

RSC Advances ◽

10.1039/c4ra11276h ◽

2014 ◽

Vol 4 (108) ◽

pp. 63238-63245 ◽

Cited By ~ 18

Author(s):

Hua Lv ◽

Yumin Liu ◽

Jiayuan Hu ◽

Zijin Li ◽

Yan Lu

Keyword(s):

Ionic Liquid ◽

Photocatalytic Activity ◽

Graphene Oxide ◽

Hydrothermal Synthesis ◽

Visible Light ◽

Reduced Graphene Oxide ◽

Visible Light Irradiation ◽

Reduced Graphene ◽

Photocatalytic Activities ◽

Oxide Composites

Due to the synergistic contributions of graphene and ionic liquid, the as-prepared RGO–Bi2WO6 samples exhibited the remarkably enhanced photocatalytic activities under visible light irradiation.

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