Use of the graphite intercalation compound to produce low-defect graphene sheets for the photocatalytic enhancement of graphene/TiO2 composites

Tibodee, Ananya; Pannak, Phetladda; Akkarachaneeyakorn, Khrongkhwan; Thaweechai, Thammanoon; Sirisaksoontorn, Weekit

doi:10.1016/j.matchemphys.2019.121755

Cited by 10 publications

(6 citation statements)

References 58 publications

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“…NH + 4 and SO 2− 4 ions are obtained in the first hour of the process, while NO − 3 ions are detected after more than six hours of photodegradation. This reveals the evolution of MB photodegradation because the concentration of these ions increases with increasing time [33] as shown in Figure S7. To determine the role of specific active species in the photocatalytic process, a control experiment was performed by adding 0.1 M isopropanol, which acted as a chemical selective radical scavenger for hydroxyl radicals in the MB solution.…”

Section: Photocatalytic Activity Of Prepared Zno and Zno@mof-46(zn)-dwmentioning

confidence: 72%

“…Ion chromatography analysis was used to determine the concentrations of inorganic products, ammonium, sulfate, and nitrate ions (NH , SO , and NO , respectively) obtained during MB photodegradation for a radiation time of 600 min (10 NH and SO ions are obtained in the first hour of the process, while NO ions are detected after more than six hours of photodegradation. This reveals the evolution of MB photodegradation because the concentration of these ions increases with increasing time [33] as shown in Figure S7.…”

Section: Photocatalytic Activity Of Prepared Zno and Zno@mof-46(zn)-dwmentioning

confidence: 72%

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Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

et al. 2021

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The heterostructure of ZnO and MOF-46(Zn) was synthesized to improve the photocatalytic performance of ZnO and prove the synergistic theory that presented the coexistence of ZnO and MOF-46(Zn), providing better efficiency than pure ZnO. The heterostructure material was synthesized by using prepared ZnO as a Zn2+ source, which was reacted with 2-aminoterephthalic acid (2-ATP) as a ligand to cover the surface of ZnO with MOF-46(Zn). The ZnO reactant materials were modified by pyrolysis of various morphologies of IRMOF-3 (Zn-MOF) prepared by using CTAB as a morphology controller. The octahedral ZnO obtained at 150 mg of CTAB shows better efficiency for photodegradation, with 85.79% within 3 h and a band gap energy of 3.11 eV. It acts as a starting material for synthesis of ZnO@MOF-46(Zn). The ZnO/MOF-46(Zn) composite was further used as a photocatalyst material in the dye (methylene blue: MB) degradation process, and the performance was compared with that of pure prepared ZnO. The results show that the photocatalytic efficiency with 61.20% in the MB degradation of the heterostructure is higher than that of pure ZnO within 60 min (90.09% within 180 min). The reason for this result may be that the coexistence of ZnO and MOF-46(Zn) can absorb a larger range of energy and reduce the possibility of the electron–hole recombination process.

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Section: Photocatalytic Activity Of Prepared Zno and Zno@mof-46(zn)-dwmentioning

confidence: 72%

Section: Photocatalytic Activity Of Prepared Zno and Zno@mof-46(zn)-dwmentioning

confidence: 72%

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

et al. 2021

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“…However, these contributions have proposed Langmuir-Hinshelwood and first-order kinetic expressions to represent the reaction rate, in which the model parameters depend on experimental conditions (radiation flux, catalyst concentration, reactor configuration, etc.) [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

TiO2-rGO photocatalytic degradation of an emerging pollutant: kinetic modelling and determination of intrinsic kinetic parameters

Tolosana-Moranchel

Manassero

Satuf

et al. 2019

Journal of Environmental Chemical Engineering

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“…The overall results suggest that the addition of MoS 2 extends the optical absorption into the visible region, causing a reduction in band gap energy of MoS 2 /TiO 2 nanoparticles (2.70 eV for 20MoTi vs 3.25 eV for TiO 2 ). Moreover, MoS 2 also provides electron-trapping sites for the suppression of charge carrier recombination as seen in the quenching of PL emission intensity. , For the photocatalytic study, methylene blue was selected as a model compound for the determination of the photocatalytic efficiency of MoS 2 /TiO 2 nanoparticles under UV light and the results are shown in Table and Figure S5. In comparison, bare TiO 2 exhibits 99.48% degradation ( k = 0.0313 min –1 ) while MoS 2 exhibits only 22.94% degradation ( k = 0.0014 min –1 ) due to low absorption in UV light .…”

Section: Results and Discussionmentioning

confidence: 99%

Bifunctional MoS₂/TiO₂ Nanoparticles for Hydrodeoxygenation of Oleic Acid and Photodegradation of Carbonaceous Deposits

Krobkrong

Wangvisavawit

Chanlek

et al. 2022

ACS Appl. Nano Mater.

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In this work, MoS 2 /TiO 2 nanoparticles were investigated as a bifunctional catalyst for the conversion of oleic acid to diesel-range hydrocarbons and the removal of carbonaceous deposits on the catalyst surface. The entire series of catalysts with different mass loadings of MoS 2 (5−20 wt %) was synthesized via a solvothermal method. MoS 2 /TiO 2 nanoparticles had a high degree of MoS 2 dispersion on anatase TiO 2 support. The Brunauer− Emmett−Teller analysis reveals a marked increase in the specific surface area of 20 wt % MoS 2 /TiO 2 (171 m 2 g −1 ) compared to bare TiO 2 (121 m 2 g −1 ). For the catalytic conversion of oleic acid, it was found that the fraction of diesel-range hydrocarbons (C17−C18) in liquid products enhanced with increasing MoS 2 mass loading. Moreover, the MoS 2 /TiO 2 catalyst also presented high selectivity toward C18 hydrocarbons. This suggests that hydrodeoxygenation (HDO) was a dominant pathway for the catalytic conversion of oleic acid over MoS 2 /TiO 2 nanoparticles. For the photocatalytic degradation, to clean up the MoS 2 /TiO 2 catalyst after being used for the oleic acid conversion, hence, the photocatalytic removal of carbonaceous deposits on the surface was studied. The results demonstrate that carbonaceous deposits on spent MoS 2 /TiO 2 were removed under UV-light irradiation due to the photodegradation property of the TiO 2 support. Therefore, the active surface of the MoS 2 /TiO 2 catalyst was simply recovered by a facile approach at room temperature.

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Use of the graphite intercalation compound to produce low-defect graphene sheets for the photocatalytic enhancement of graphene/TiO2 composites

Cited by 10 publications

References 58 publications

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

TiO2-rGO photocatalytic degradation of an emerging pollutant: kinetic modelling and determination of intrinsic kinetic parameters

Bifunctional MoS₂/TiO₂ Nanoparticles for Hydrodeoxygenation of Oleic Acid and Photodegradation of Carbonaceous Deposits

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Use of the graphite intercalation compound to produce low-defect graphene sheets for the photocatalytic enhancement of graphene/TiO2 composites

Cited by 10 publications

References 58 publications

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

TiO2-rGO photocatalytic degradation of an emerging pollutant: kinetic modelling and determination of intrinsic kinetic parameters

Bifunctional MoS2/TiO2 Nanoparticles for Hydrodeoxygenation of Oleic Acid and Photodegradation of Carbonaceous Deposits

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Product

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Bifunctional MoS₂/TiO₂ Nanoparticles for Hydrodeoxygenation of Oleic Acid and Photodegradation of Carbonaceous Deposits