Synthesis of Cu2O/graphene/rutile TiO2 nanorod ternary composites with enhanced photocatalytic activity

Sun, Mingxuan; Fang, Yalin; Wang, Ying; Sun, Shanfu; He, Jiating; Yan, Zhi

doi:10.1016/j.jallcom.2015.08.002

Cited by 62 publications

(19 citation statements)

References 57 publications

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“…The use of semiconductor materials for the photocatalytic decomposition of organic pollutants in the gas or liquid states has aroused much interest from researchers [ 1 , 2 , 3 ]. Metal oxides, such as tungsten trioxide (WO 3 ) and titanium dioxide (TiO 2 ), and graphene are the most promising photocatalysts [ 4 , 5 , 6 ] owing to their high chemical stability, non-toxicity, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Gong

et al. 2018

Materials

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Tungsten trioxide (WO3) nanorods are synthesized on the surface of graphene (GR) sheets by using a one-step in-situ hydrothermal method employing sodium tungstate (Na2WO4·2H2O) and graphene oxide (GO) as precursors. The resulting WO3/GR nanocomposites are characterized by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The results confirm that the interface between WO3 nanorod and graphene contains chemical bonds. The enhanced optical absorption properties are measured by UV-vis diffuse reflectance spectra. The photocatalytic activity of the WO3/GR nanocomposites under visible light is evaluated by the photodegradation of methylene blue, where the degradation rate of WO3/GR nanocomposites is shown to be double that of pure WO3. This is attributed to the synergistic effect of graphene and the WO3 nanorod, which greatly enhances the photocatalytic performance of the prepared sample, reduces the recombination of the photogenerated electron-hole pairs and increases the visible light absorption efficiency. Finally, the photocatalytic mechanism of the WO3/GR nanocomposites is presented. The synthesis of the prepared sample is convenient, direct and environmentally friendly. The study reports a highly efficient composite photocatalyst for the degradation of contaminants that can be applied to cleaning up the environment.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Gong

et al. 2018

Materials

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“…The results shown in Figure S4 can be analyzed that the decomposition of MB by 90% takes about 72 minutes. Though insufflating air into the solution to replace mechanical agitation, we found it still need 50 to 60 minutes . It shows that the Cu 2 O/TiO 2 nanocomposites have a better performance than ordinary pure Cu 2 O.…”

Section: Resultsmentioning

confidence: 93%

High Efficient Cu₂O/TiO₂ Nanocomposite Photocatalyst to Degrade Organic Polluant under Visible Light Irradiation

2018

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The enhanced photocatalytic properties of Cu 2 O/TiO 2 nanocomposites resulting from the synthesis of uniform p-type Cu 2 O and n-type TiO 2 via wet chemical method were studied. The nanocomposite also had been well characterized and tested for its photocatalytic activity. These results indicate that the photocatalytic performance of the composites is clearly improved. The degradation rate of methylene blue solution (10 mg/L) increased to 93.67% in 45 minutes. The p-n heterojunction theory was used to explain the enhanced photocatalytic properties. The photocatalytic performances of Cu 2 O/TiO 2 nanocomposites and its photoreaction mechanism were proposed and discussed in this work.

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“…Owing to its unique properties, several researchers have attempted to introduce graphene to modify TiO 2 towards the improvement of its photocatalytic activity [22,23]. …”

Section: Introductionmentioning

confidence: 99%

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

Liu

Bai

et al. 2018

R. Soc. open sci.

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Anatase TiO2 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 TiO2 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 TiO2, and combined with the surface of {001} TiO2. 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 TiO2 were significantly improved following the incorporation of RGO, particularly under visible light irradiation. Theoretical calculations showed that the band structure of the {001} faceted TiO2 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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Synthesis of Cu2O/graphene/rutile TiO2 nanorod ternary composites with enhanced photocatalytic activity

Cited by 62 publications

References 57 publications

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

High Efficient Cu₂O/TiO₂ Nanocomposite Photocatalyst to Degrade Organic Polluant under Visible Light Irradiation

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

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Synthesis of Cu2O/graphene/rutile TiO2 nanorod ternary composites with enhanced photocatalytic activity

Cited by 62 publications

References 57 publications

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

High Efficient Cu2O/TiO2 Nanocomposite Photocatalyst to Degrade Organic Polluant under Visible Light Irradiation

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

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Product

Resources

About

High Efficient Cu₂O/TiO₂ Nanocomposite Photocatalyst to Degrade Organic Polluant under Visible Light Irradiation

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