Junction of porous g-C3N4 with BiVO4 using Au as electron shuttle for cocatalyst-free robust photocatalytic hydrogen evolution

Song, Meiting; Wu, Yuhang; Zheng, Guopeng; Du, Chunfang; Su, Yiguo

doi:10.1016/j.apsusc.2019.143808

Cited by 43 publications

(10 citation statements)

References 61 publications

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“…Mostly, no hydrogen gas is photocatalytically generated over the free-standing Gr sample, while the CeO 2 /Gr nanocomposites exhibit a much higher HER achievement with respect to their counterparts. The superiority of three-factored Au@CeO 2 /Gr 2.0 HNSs is comparable to the currently available CeO 2 -based, Gr-based, and Au-based HER photocatalysts (Figure c). ,− Our findings indicate the success of these advanced photocatalysts under visible-light irradiation. The effect of the incident wavelengths over the catalytic performance of the best ternary Au@CeO 2 /Gr 2.0 HNSs entity is also considered through the AQY efficiency, calculated from the relative HER activity.…”

Section: Resultssupporting

confidence: 61%

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

et al. 2022

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Recently, various attempts have been made for light-to-fuels conversion, often with limited performance. Herein we report active and lasting three-factored hierarchical photocatalysts consisting of plasmon Au, ceria semiconductor, and graphene conductor for hydrogen production. The Au@CeO2/Gr2.0 entity (graphene outer shell thickness of 2.0 nm) under visible-light irradiation exhibits a colossal achievement (8.0 μmol mgcat –1 h–1), which is 2.2- and 14.3-fold higher than those of binary Au@CeO2 and free-standing CeO2 species, outperforming the currently available catalysts. Yet, it delivers a high maximum quantum yield efficiency of 38.4% at an incident wavelength of 560 nm. These improvements are unambiguously attributed to three indispensable effects: (1) the plasmon resonant energy is light-excited and transferred to produce hot electrons localizing near the surface of Au@CeO2, where (2) the high-surface-area Gr conductive shell will capture them to direct hydrogen evolution reactions, and (3) the active graphene hybridized on the defect-rich surface of Au@CeO2 favorably adsorbs hydrogen atoms, which all bring up thorough insight into the working of a ternary Au@CeO2/Gr catalyst system in terms of light-to-hydrogen conversion.

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Section: Resultssupporting

confidence: 61%

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

et al. 2022

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“…3(a). The characteristic peaks for Bi 4f, P 2p, C 1s, N 1s, V 2p and O 1s that appear in the BiPO 4 , BiVO 4 and g-C 3 N 4 spectra are also used in the PVCN/SAC spectra, 48 which are in accordance with the EDS results. For PVCN/SAC, strong C diffraction peaks were obtained due to the addition of SAC, while the Bi, P, N and V peaks were weakened, which can be attributed to the presence of some of the BiPO 4 , BiVO 4 and g-C 3 N 4 photocatalyst in the internal pores of the SAC.…”

Section: Resultssupporting

confidence: 78%

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO₄–BiPO₄–g-C₃N₄ under visible light irradiation

Shi

Xue

Xiao

et al. 2022

Phys. Chem. Chem. Phys.

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“…In this context, heterostructures combining oxides, carbon-based and metallic nanoparticle (NP) systems aiming at forming staggered heterojunctions and Schottky junctions [8] have been reported to tackle this issue. One can briefly mention a few recent examples: g-C 3 N 4 /TiO 2 [9], A-TiO 2 /Au/g-C 3 N 4 [10], Au/TiO 2 -CeO 2 [11], Cu x O-TiO 2 [12], gC 3 N 4 /Au/BiVO 4 [13], TiO 2 -WO 3 -Au [14], Pt/WO 3 -TiO 2 [15], CdS/TiO 2 /WO 3 [16], and Pt-TiO 2 /g-C 3 N 4 -MnO x [17]. Most of the mentioned ternary and particularly the quaternary composite present efficient photogenerated paths that serve as reference systems.…”

Section: Introductionmentioning

confidence: 99%

Au/TiO2(P25)-gC3N4 composites with low gC3N4 content enhance TiO2 sensitization for remarkable H2 production from water under visible-light irradiation

et al. 2020

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A series of ternary Au/TiO 2 (P25)-gC 3 N 4 heterostructure photocatalysts with low Au nanoparticle (NP) loading and gC 3 N 4 content were synthesized and evaluated for H 2 production from water with a very low amount of sacrificial agent (1 vol%) under solar and visible-light irradiation. The optimized composite, 0.3 wt% Au/ TiO 2 (P25)-gC 3 N 4 (95-5), exhibited a remarkable production rate under visible light (419 μmol À 1 h À 1 g catalyst of H 2 ), corresponding to almost twice the cumulated H 2 production over 2.5 h as that of the Au/TiO 2 (P25) reference. To best of our knowledge, this high of a yield has never been reported for comparable experimental conditions. The highest performing composite was characterized using UV-vis, XPS, UPS, BET, TEM, and TRMC techniques. The performance of the photocatalyst could be correlated to contributions of various phenomena such as effective heterojunction formation of TiO 2 with gC 3 N 4 operating in a Z-scheme dynamic allowing TiO 2 photosensitization towards visible-light, also leading to new electronic hybrid states, and plasmonic Au/support Schottky junction allowing electronic trapping sites and co-catalytic effects. These contributions resulted in more efficient light harvesting and separation of the charge carriers to enhance visible light driven activity.

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Junction of porous g-C3N4 with BiVO4 using Au as electron shuttle for cocatalyst-free robust photocatalytic hydrogen evolution

Cited by 43 publications

References 61 publications

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO₄–BiPO₄–g-C₃N₄ under visible light irradiation

Au/TiO2(P25)-gC3N4 composites with low gC3N4 content enhance TiO2 sensitization for remarkable H2 production from water under visible-light irradiation

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Junction of porous g-C3N4 with BiVO4 using Au as electron shuttle for cocatalyst-free robust photocatalytic hydrogen evolution

Cited by 43 publications

References 61 publications

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO2/Gr Hierarchical Photocatalysts

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO2/Gr Hierarchical Photocatalysts

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO4–BiPO4–g-C3N4 under visible light irradiation

Au/TiO2(P25)-gC3N4 composites with low gC3N4 content enhance TiO2 sensitization for remarkable H2 production from water under visible-light irradiation

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Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

Efficient degradation of VOCs using semi-coke activated carbon loaded ternary Z-scheme heterojunction photocatalyst BiVO₄–BiPO₄–g-C₃N₄ under visible light irradiation