Dion–Jacobson-type perovskite KCa2Ta3O10 nanosheets hybridized with g-C3N4 nanosheets for photocatalytic H2 production

Jiang, Deli; Ma, Wanxia; Yao, Yingjie; Xiao, Peng; Wen, Baowei; Li, Di

doi:10.1039/c8cy00930a

Cited by 27 publications

(7 citation statements)

References 34 publications

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“…Then, the band gap energies were calculated using (αhν) n =k(hν−E), where α, h, k and ν refer absorption coefficient, Planck's constant, a constant, and frequency of incident light, respectively. E g represents the band gap energy for semiconductors, n is 2 for direct band gap semiconductor NbO x (OH) y and n is 1/2 for indirect band gap semiconductor CN . Thus, the band gap energy (E g ) of CN and NbO x (OH) y is determined to be 2.5 eV and 3.3 eV, respectively (Figure b).…”

Section: Resultsmentioning

confidence: 98%

Strongly Coupled Amorphous Porous NbO_x(OH)_y/g‐C₃N₄ Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

Zhang

Han

et al. 2019

ChemistrySelect

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Heterostructure composites are promising materials in photocatalytic hydrogen evolution due to their advantage on promoting photogenerated carrier separation efficiently. However, the weak interfacial interaction can block electron transfer and complicate synthesis methods restrict the practical application of catalysts. Here, we report an interfacial enhanced amorphous porous NbO x (OH) y /g-C 3 N 4 heterostructure composite through a spontaneous coupling process. It was characterized by XRD, TEM, FT-IR, XPS, NH 3 -TPD and CO 2 -TPD, ect., which demonstrated that NbO x (OH) y possess amorphous porous structures with high specific surface area (205 m 2 /g) and plenty of acidic sites (418 μmol/g) as well as basic sites (184 μmol/g) contributed from uncoordinated Nb and -OH. These acidic and basic sites electrostatically attract -NH x and C-OH on the surface of g-C 3 N 4 to form hydrogen bonds (Nb-O-H⋅⋅⋅NH 2 , Nb-O⋅⋅⋅H-O-C), showing a strong electron interaction between NbO x (OH) y and g-C 3 N 4 . When tested as a photocatalyst for water splitting under visible light, the optimal NbO x (OH) y / CN-0.05 heterostructure composite exhibits a hydrogen evolution rate of 53 μmol/g/h, which is about 14 times higher than that of g-C 3 N 4 (3.8 μmol/g/h) and is even superior than P25 (16 μmol/g/h). These present findings lay a foundation for the synthesis of strongly interacting heterogeneous composites.

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Section: Resultsmentioning

confidence: 98%

Strongly Coupled Amorphous Porous NbO_x(OH)_y/g‐C₃N₄ Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

Zhang

Han

et al. 2019

ChemistrySelect

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“…In addition, the hybrid photocatalysts are usually propitious to be more stable and have a wide range of light absorption. Metal sulfides 256 and graphitic carbon nitride (g-C3N4) 3,249 are widely used to form hetero junctions with perovskites. g-C3N4 has high conduction band position, visible light response, large specific surface area and favorable physical and chemical stability 11,41,42,45,46,51 .…”

Section: Water Splittingmentioning

confidence: 99%

“…The g-C3N4/KCa2Ta3O10 2D-2D nanosheet heterojunctions (Fig. 18e) fabricated by two-step wet chemistry synthetic method obtained intriguing H2 evolution rate (4333 μmol•g −1 •h −1 ), which was more than twice that of bare g-C3N4 249 . Under visible light irradiation, the photoinduced electrons in the conduction band of g-C3N4 could be transferred to the KCa2Ta3O10 conduction band through the close contact interface, and then Pt nanoparticles captured the accumulated electrons due to their high Fermi level.…”

Section: Water Splittingmentioning

confidence: 99%

Recent Progress of Perovskite Oxide in Emerging Photocatalysis Landscape: Water Splitting, CO2 Reduction, and N2 Fixation

王则鉴¹,

洪佳佳²,

Sue-Faye³

et al. 2020

Acta Physico Chimica Sinica

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“…This outcome may result from the development of charge carrier separation, which occurs with each of the catalysts g-C 3 N 4 /Ag 2 MoO 4 , g-C 3 N 4 /Bi 2 O 4 , g-C 3 N 4 /perovskite oxide, and g-C 3 N 4 /TiO 2 . 14 − 19 Combined semiconductors containing CoAl 2 O 4 have been utilized for photocatalytic decomposition. CoAl 2 O 4 also has a narrow band gap of 1.80 eV and exhibits a strong response to visible light.…”

Section: Introductionmentioning

confidence: 99%

CoAl₂O₄–g-C₃N₄ Nanocomposite Photocatalysts for Powerful Visible-Light-Driven Hydrogen Production

Mahmoud

2021

ACS Omega

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There is no doubt that the rate of hydrogen production via the water splitting reaction is profoundly affected to a remarkable degree based on the isolation of photogenerated electrons from holes. The precipitation of any cocatalysts on the substrate surfaces (including semiconductor materials) provides significant hindrance to such reincorporation. In this regard, a graphite-like structure in the form of mesoporous g-C 3 N 4 formed in the presence of a template of mesoporous silica has been synthesized via the known combustion method. Hence, the resulting g-C 3 N 4 nanosheets were decorated with varying amounts of mesoporous CoAl 2 O 4 nanoparticles (1.0–4.0%). The efficiencies of the photocatalytic H 2 production by CoAl 2 O 4 -doped g-C 3 N 4 nanocomposites were studied and compared with those of pure CoAl 2 O 4 and g-C 3 N 4 . Visible light irradiation was carried out in the presence of glycerol as a scavenger. The results showed that the noticeable photocatalytic enhancement rate was due to the presence of CoAl 2 O 4 nanoparticles distributed on the g-C 3 N 4 surface. The 3.0% CoAl 2 O 4 –g-C 3 N 4 nanocomposite had the optimum concentration. This photocatalyst showed extremely high photocatalytic activities that were up to 22 and 45 times greater than those of CoAl 2 O 4 and g-C 3 N 4 , respectively. This photocatalyst also showed 5 times higher photocatalytic stability than that of CoAl 2 O 4 or g-C 3 N 4 . The presence of CoAl 2 O 4 nanoparticles as a cocatalyst increased both the efficiency and productivity of the CoAl 2 O 4 –g-C 3 N 4 photocatalyst. This outcome was attributed to the mesostructures being efficient charge separation carriers with narrow band gaps and high surface areas, which were due to the presence of CoAl 2 O 4 .

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Dion–Jacobson-type perovskite KCa₂Ta₃O₁₀ nanosheets hybridized with g-C₃N₄ nanosheets for photocatalytic H₂ production

Abstract: Dion–Jacobson-type perovskite oxide KCa2Ta3O10 has been identified as a promising semiconductor for construction of hybrid catalyst for photocatalytic H2 evolution.

Cited by 27 publications

References 34 publications

Strongly Coupled Amorphous Porous NbO_x(OH)_y/g‐C₃N₄ Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

Strongly Coupled Amorphous Porous NbO_x(OH)_y/g‐C₃N₄ Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

Recent Progress of Perovskite Oxide in Emerging Photocatalysis Landscape: Water Splitting, CO<sub>2</sub> Reduction, and N<sub>2</sub> Fixation

CoAl₂O₄–g-C₃N₄ Nanocomposite Photocatalysts for Powerful Visible-Light-Driven Hydrogen Production

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Dion–Jacobson-type perovskite KCa2Ta3O10 nanosheets hybridized with g-C3N4 nanosheets for photocatalytic H2 production

Abstract: Dion–Jacobson-type perovskite oxide KCa2Ta3O10 has been identified as a promising semiconductor for construction of hybrid catalyst for photocatalytic H2 evolution.

Cited by 27 publications

References 34 publications

Strongly Coupled Amorphous Porous NbOx(OH)y/g‐C3N4 Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

Strongly Coupled Amorphous Porous NbOx(OH)y/g‐C3N4 Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

Recent Progress of Perovskite Oxide in Emerging Photocatalysis Landscape: Water Splitting, CO<sub>2</sub> Reduction, and N<sub>2</sub> Fixation

CoAl2O4–g-C3N4 Nanocomposite Photocatalysts for Powerful Visible-Light-Driven Hydrogen Production

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Dion–Jacobson-type perovskite KCa₂Ta₃O₁₀ nanosheets hybridized with g-C₃N₄ nanosheets for photocatalytic H₂ production

Strongly Coupled Amorphous Porous NbO_x(OH)_y/g‐C₃N₄ Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

Strongly Coupled Amorphous Porous NbO_x(OH)_y/g‐C₃N₄ Heterostructure Composite for Efficient Photocatalytic Hydrogen Evolution

CoAl₂O₄–g-C₃N₄ Nanocomposite Photocatalysts for Powerful Visible-Light-Driven Hydrogen Production