Facile synthesis, characterization and recyclable photocatalytic activity of Ag2WO4@g-C3N4

Kumaravel, Vignesh; Kang, Misook

doi:10.1016/j.mseb.2015.04.009

Cited by 69 publications

(17 citation statements)

References 127 publications

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“…Instead of the extensively used TiO 2 , NiWO 4 containing Ni, a methanation catalyst, is introduced as the main photocatalyst into tungsten oxide with a bandgap of 2.6−2.8 eV. Recently, photocatalysts of metal or non-metal oxygenates such as M-VO 4 [11], M-BO 3 [12], M-WO 4 [13], and M-PO 4 [14] have been developed. The bandgaps of these catalysts are~2.0−3.0 eV, which are smaller than that of TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

Catalytic Activity of Ni1-xLi2xWO4 Particles for Carbon Dioxide Photoreduction

et al. 2019

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This study introduces NiWO4 as a main photocatalyst, where the Ni component promotes methanation to generate a WO3-based catalyst, as a new type of catalyst that promotes the photoreduction of carbon dioxide by slowing the recombination of electrons and holes. The bandgap of NiWO4 is 2.74 eV, which was expected to improve the initial activity for the photoreduction of carbon dioxide. However, fast recombination between the holes and electrons was also expected. To overcome this problem, attempts were made to induce structural defects by partially replacing the Ni2+ ions in NiWO4 with Li+. The resulting CO2 conversion reaction was greatly enhanced with the Ni1-xLi2xWO4 catalysts containing Li+, compared to that of the pure NiWO4 catalysts. Notably, the total amount of CO and CH4 produced with the Ni0.8Li0.4WO4 catalyst was 411.6 nmol g−1. It is believed that the insertion of Li+ ions into the NiWO4 skeleton results in lattice defects due to charge and structural imbalance, which play a role in the capture of CO2 gas or excited electrons, thereby inhibiting recombination between the electrons and holes in the Ni1-xLi2xWO4 particles.

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Section: Introductionmentioning

confidence: 99%

Catalytic Activity of Ni1-xLi2xWO4 Particles for Carbon Dioxide Photoreduction

et al. 2019

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“…The holes can further react with water to form hydroxyl radicals (⋅OH). The photogenerated electrons would then react with O 2 to produce superoxide radical anion O 2 ⋅‐ which could work together with photogenerated holes to degrade dye molecules . The free radical trapping experiments of g‐C 3 N 4 /Ag (11) were carried out to determine the major oxidation‐active groups in the photocatalytic degradation process.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Visible‐Light Photocatalytic and Antibacterial Activities of Ag‐Doped g‐C₃N₄ Nanocomposites

Liu

Zhang

2018

ChemistrySelect

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The silver modified graphitic carbon nitride (g‐C3N4/Ag) was prepared by the photo‐deposition method. The crystal structures, chemical structures, morphology, recombination rate and surface charge were characterized by X‐ray diffraction spectroscopy (XRD), Fourier transform‐infrared spectroscopy (FTIR), Transmission electron microscopy (TEM), photoluminescence spectra (PL), and zeta potential, respectively. The effects of silver content on the photocatalytic and antibacterial performance were studied. The photocatalytic mechanism of the g‐C3N4/Ag was revealed by free radical capture. The results showed that the prepared catalysts had layered stack structure. The photocatalytic property and antibacterial activity of g‐C3N4/Ag nanocomposites were significantly promoted by the modification of silver nanoparticles.

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“…The band edge positions of Ag 2 WO 4 and g‐C 3 N 4 play an important role in the study of the photoinduced electron–hole transfer. It is reported that the CB edges of g‐C 3 N 4 and Ag 2 WO 4 are at −1.12 and −0.04 eV (versus NHE), respectively. Thence, the LUMO level of g‐C 3 N 4 is more negative than the CB edge of Ag 2 WO 4 , and the excited electrons in the CB of g‐C 3 N 4 will flow into the CB of Ag 2 WO 4 .…”

Section: Resultsmentioning

confidence: 99%

Facile preparation of Ag/Ag₂WO₄/g‐C₃N₄ ternary plasmonic photocatalyst and its visible‐light photocatalytic activity

Jiang

Zhu

Qiu

et al. 2018

Applied Organom Chemis

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Introducing plasmonic metals into semiconductor materials has been proven to be an attractive strategy for enhancing photocatalytic activity in the visible region. In this work, a novel and efficient Ag/Ag2WO4/g‐C3N4 (AACN) ternary plasmonic photocatalyst was successfully synthesized using a facile one‐step in situ hydrothermal method. The composition, structure, morphology and optical absorption properties of AACN were investigated using X‐ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and UV–visible diffuse reflectance spectroscopy, respectively. Photocatalytic performance of AACN was evaluated via rhodamine B and tetracycline degradation. The results indicated that AACN had excellent photocatalytic performance for rhodamine B degradation with a rate constant of 0.0125 min−1, which was higher than those of Ag2WO4 and Ag/Ag2WO4. Characterization and photocatalytic tests showed that the strong coupling effect between the Ag/Ag2WO4 nanoparticles and the exfoliated ultrathin g‐C3N4 nanosheets was superior for visible‐light responsivity and reduced the recombination rate of photogenerated electrons and holes. A proposed mechanism is also discussed according to the band energy structure and the experimental results.

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Facile synthesis, characterization and recyclable photocatalytic activity of Ag2WO4@g-C3N4

Cited by 69 publications

References 127 publications

Catalytic Activity of Ni1-xLi2xWO4 Particles for Carbon Dioxide Photoreduction

Catalytic Activity of Ni1-xLi2xWO4 Particles for Carbon Dioxide Photoreduction

Enhanced Visible‐Light Photocatalytic and Antibacterial Activities of Ag‐Doped g‐C₃N₄ Nanocomposites

Facile preparation of Ag/Ag₂WO₄/g‐C₃N₄ ternary plasmonic photocatalyst and its visible‐light photocatalytic activity

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Facile synthesis, characterization and recyclable photocatalytic activity of Ag2WO4@g-C3N4

Cited by 69 publications

References 127 publications

Catalytic Activity of Ni1-xLi2xWO4 Particles for Carbon Dioxide Photoreduction

Catalytic Activity of Ni1-xLi2xWO4 Particles for Carbon Dioxide Photoreduction

Enhanced Visible‐Light Photocatalytic and Antibacterial Activities of Ag‐Doped g‐C3N4 Nanocomposites

Facile preparation of Ag/Ag2WO4/g‐C3N4 ternary plasmonic photocatalyst and its visible‐light photocatalytic activity

Contact Info

Product

Resources

About

Enhanced Visible‐Light Photocatalytic and Antibacterial Activities of Ag‐Doped g‐C₃N₄ Nanocomposites

Facile preparation of Ag/Ag₂WO₄/g‐C₃N₄ ternary plasmonic photocatalyst and its visible‐light photocatalytic activity