Direct Z-scheme g-C3N4/WO3 photocatalyst with atomically defined junction for H2 production

Yu, Weilai; Chen, Junxiang; Shang, Tongtong; Chen, Linfeng; Gu, Lin; Peng, Tianyou

doi:10.1016/j.apcatb.2017.08.018

Cited by 648 publications

(234 citation statements)

References 54 publications

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“…The crystal structure, particle size, surface area, morphology, composition, and optical properties of prepared samples may significantly influence photocatalytic performance. 38,39 The photocatalytic activity of all samples were assessed by monitoring the rate of hydrogen evolution in the presence of visible light irradiation (λ ≥ 420) and outline of H 2 evolution is revealed in Figure 7A. The improved efficiency for composite samples, with varying concentration of BiVO 4 , was measured when compared with that of pure photocatalysts.…”

Section: Photocatalytic Performance For H 2 Evolutionmentioning

confidence: 99%

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

2019

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Summary In this article, a ternary WO3/g‐C3N4@ BiVO4 composites were prepared using eco‐friendly hydrothermal method to produce efficient hydrogen energy through water in the presence of sacrificial agents. The prepared samples were characterized by scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), transmission electron microscopy (TEM), X‐ray diffraction (XRD), ultraviolet‐visible (UV‐vis), Brunauer‐Emmett‐Teller (BET) surface area, and photoluminescence spectroscopy (PL) emission spectroscopy. The experimental study envisages the formation of 2‐D nanostructures and observed that such kinds of nanostructures could provide more active sites for photocatalytic reduction of water and their inherent reactive‐species mechanism. The results showed the excellent photocatalytic performance (432 μmol h−1 g−1) for 1.5% BiVO4 nanoparticles in WO3/g‐C3N4 composite when compared with pure WO3 and BiVO4. The optical properties and photocatalytic activity measurement confirmed that BiVO4 nanoparticles in WO3/g‐C3N4 photocatalyst inhibited the recombination of photogenerated electron and holes and enhanced the reduction reactions for H2 production. The enhanced photocatalytic efficiency of the composite nanostructures may be attributed to wide absorption region of visible light, large surface area, and efficient separation of electrons/holes pairs owing to synergistic effects between BiVO4 and WO3/g‐C3N4. The prepared samples would be a precise optimal photocatalyst to increase their suppliers for worldwide applications especially in energy harvesting.

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Section: Photocatalytic Performance For H 2 Evolutionmentioning

confidence: 99%

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

2019

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“…Mimicking the natural photosynthesis process, some all solid-state Z-scheme photocatalyst system based on g-C 3 N 4 with other semiconductors were obtained and used, such as WO 3 , Ag 3 PO 4 , BiOX (X=Cl, Br, I), V 2 O 5 , etc 40–44 . A Z-scheme system of g-C 3 N 4 /WO 3 was used to generate hydrogen and its separation mechanisms were also studied deeply 40,45,46 . He et al .…”

Section: Introductionmentioning

confidence: 99%

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Yuping

et al. 2018

Sci Rep

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Due to low charge separation efficiency and poor stability, it is usually difficult for single-component photocatalysts such as graphitic carbon nitride (g-C3N4) and silver chromate (Ag2CrO4) to fulfill photocatalytic hydrogen production efficiently. Z-scheme charge transport mechanism that mimics the photosynthesis in nature is an effective way to solve the above problems. Inspired by photosynthesis, we report Ag2CrO4 nanoparticles-decorated g-C3N4 nanosheet as an efficient photocatalyst for hydrogen evolution reaction (HER) with methanol as sacrificial agent. The formation of Z-scheme g-C3N4/Ag2CrO4 nanosheets photocatalysts could inhibit the recombination of photogenerated electron-hole pairs, promote the generation of hydrogen by photosplitting of water. The experiment results indicate that g-C3N4/Ag2CrO4 nanocomposites present enhanced photocatalytic activity and stability in the H2 evolution of water splitting. And the nanocomposites g-C3N4/Ag2CrO4(23.1%) show the 14 times HER efficiency compared to that of bare g-C3N4.

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“…Figure ‐a shows the infrared spectra of the pure Ni 2 P, g‐C 3 N 4 , CdS, CdS/g‐C 3 N 4 , CdS/Ni 2 P and over Ni 2 P‐CdS/g‐C 3 N 4 with different contents of Ni 2 P. The characteristic obsorption peak at ∼3400 cm −1 is identified with the C−H stretching vibration. The peaks at about 1410 cm −1 and 1670 cm −1 are respectively belonged to symmetric vibrations and O−C‐O asymmetric ,…”

Section: Resultsmentioning

confidence: 99%

Rationally Designed Functional Ni₂P Nanoparticles as Co–Catalyst Modified CdS@g‐C₃N₄ Heterojunction for Efficient Photocatalytic Hydrogen Evolution

Wang

Jin

2019

ChemistrySelect

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Ni2P nanoparticle contained no precious metal as co‐catalyst to touch up CdS nanorods coupling with graphitic C3N4 for H2 evolution was synthesized successfully by in‐situ fabrication approach. The preparative Ni2P‐CdS/g‐C3N4 composite catalyst exerts remarkable hydrogen production activity and exhibit good photostability in 20 hour cycles. The hydrogen evolution rate is 9.9 times as high as that of pure CdS. Morphological characterization, optical results and electrochemical test proved that special CdS/g‐C3N4 enhanced the transfer of electrons on CdS and g‐C3N4, loading Ni2P co‐catalyst further increased the synergistic effect in photocatalytic properties. Several characterization results such as transmission electron microscopy (TEM), X‐ray diffraction (XRD), The Ultraviolet–visible spectroscopy diffuse reflectance spectroscopy (UV‐vis DRS), Photoluminescence (PL) and nitrogen adsorption‐desorption isotherms (BET) etc. indicate that the Ni2P nanoparticles loaded on the CdS/g‐C3N4 exposed more active sites and facilitated the efficiency of photogenic electron‐hole pairs separation. Optimistically, these results were good consistent with each other. This considerable performance probablely attribute to the special conduction band (CB) and valence band (VB) of CdS and g‐C3N4 which form a heterojuction and the introduction of Ni2P as cocatalyst further extract photogenerated electrons that lower the over potential of H+ redution.

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Direct Z-scheme g-C3N4/WO3 photocatalyst with atomically defined junction for H2 production

Cited by 648 publications

References 54 publications

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Rationally Designed Functional Ni₂P Nanoparticles as Co–Catalyst Modified CdS@g‐C₃N₄ Heterojunction for Efficient Photocatalytic Hydrogen Evolution

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Direct Z-scheme g-C3N4/WO3 photocatalyst with atomically defined junction for H2 production

Cited by 648 publications

References 54 publications

Boosting the performance of visible light‐driven WO 3 /g‐C 3 N 4 anchored with BiVO 4 nanoparticles for photocatalytic hydrogen evolution

Boosting the performance of visible light‐driven WO 3 /g‐C 3 N 4 anchored with BiVO 4 nanoparticles for photocatalytic hydrogen evolution

Bio-inspired Z-scheme g-C3N4/Ag2CrO4 for efficient visible-light photocatalytic hydrogen generation

Rationally Designed Functional Ni2P Nanoparticles as Co–Catalyst Modified CdS@g‐C3N4 Heterojunction for Efficient Photocatalytic Hydrogen Evolution

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Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

Boosting the performance of visible light‐driven WO ₃ /g‐C ₃ N ₄ anchored with BiVO ₄ nanoparticles for photocatalytic hydrogen evolution

Rationally Designed Functional Ni₂P Nanoparticles as Co–Catalyst Modified CdS@g‐C₃N₄ Heterojunction for Efficient Photocatalytic Hydrogen Evolution