Nanocomposites for visible light photocatalysis

Kadam, Abhijit N.; Lee, Jinhyeok; Nipane, S.V.; Lee, Sang−Wha

doi:10.1016/b978-0-12-823018-3.00017-8

Cited by 15 publications

(12 citation statements)

References 64 publications

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“…In general, PL signal is the result of recombination of photogenerated electron–hole pair. Therefore, high PL intensity indicates more recombination of charge carries, whereas in the case of Co–Eu(OH) 3 , lower PL intensity suggests the maximum separation of charge carriers …”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the PL intensity of 5% Co−Eu(OH) 3 (Figure 4b inset) exhibits the lowest intensity indicating the maximum separation of charge carriers, which is very useful for the efficient photocatalytic performance. 51 Hence, 5% Co−Eu(OH) 3 NRs showed the highest photocatalytic response. On the other hand, 1% Co−Eu(OH) 3 has the highest band gap energy.…”

Section: Uv−vis Diffusementioning

confidence: 96%

“…Therefore, high PL intensity indicates more recombination of charge carries, whereas in the case of Co−Eu(OH) 3 , lower PL intensity suggests the maximum separation of charge carriers. 49 3.5. X-Ray Photoelectron Spectroscopy.…”

Section: Uv−vis Diffusementioning

confidence: 99%

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Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)₃

Matussin,

Khan,

Harunsani

et al. 2024

ACS Omega

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The microwave-assisted synthesis approach was used to synthesize Eu(OH) 3 and Co−Eu(OH) 3 nanorods. Various techniques were used to investigate the structural, optical, and morphological features of the Eu(OH) 3 and Co−Eu(OH) 3 NRs. Both Eu(OH) 3 and Co−Eu(OH) 3 NRs were found to be hexagonal with crystallite sizes ranging from 21 to 35 nm. FT-IR and Raman spectra confirmed the formation of Eu(OH) 3 and Co−Eu(OH) 3 . Rod-shaped Eu(OH) 3 and Co−Eu(OH) 3 with average lengths and diameters ranging from 27 to 50 nm and 8 to 12 nm, respectively, were confirmed by TEM. The addition of Co was found to increase the particle size. Furthermore, with increased Co doping, the band gap energies of Co−Eu(OH) 3 NRs were lowered (3.80−2.49 eV) in comparison to Eu(OH) 3 , and the PL intensities with Co doping were quenched, suggesting the lessening of electron/hole recombination. The effect of these altered properties of Eu(OH) 3 and Co−Eu(OH) 3 was observed through the photocatalytic degradation of brilliant green dye (BG) and photoelectrochemical activity. In the photocatalytic degradation of BG, 5% Co−Eu(OH) 3 had the highest response. However, photoelectrochemical experiments suggested that 10% Co−Eu(OH) 3 NRs showed improved activity when exposed to visible light. As a result, Co−Eu(OH) 3 NRs have the potential to be a promising visiblelight active material for photocatalysis.

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Section: Resultsmentioning

confidence: 99%

Section: Uv−vis Diffusementioning

confidence: 96%

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Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)₃

Matussin,

Khan,

Harunsani

et al. 2024

ACS Omega

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“…Therefore, this separation might result in efficient and enhanced photocatalytic performance. 51 Both photocatalytic MB degradation and 4-NP reduction were significantly improved for 12% Co-CeO 2 NPs. Moreover, the particle size and morphology of NPs also play an important role in photocatalytic activity.…”

Section: Applicationsmentioning

confidence: 93%

“…The PL study of S-CeO 2 and 1, 4, 8, and 12% Co-CeO 2 NPs showed the occurrence of fluorescence quenching, which exhibits maximum separation of charge carriers of S-CeO 2 and 1, 4, 8, and 12% Co-CeO 2 NPs. Therefore, this separation might result in efficient and enhanced photocatalytic performance . Both photocatalytic MB degradation and 4-NP reduction were significantly improved for 12% Co-CeO 2 NPs.…”

Section: Applicationsmentioning

confidence: 99%

Visible-Light-Induced Photocatalytic and Photoantibacterial Activities of Co-Doped CeO₂

et al. 2023

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As one of the most significant rare earth oxides, the redox ability of cerium oxide (CeO 2 ) has become the primary factor that has attracted considerable interest over the past decades. In the present study, irregular pentagonal CeO 2 (S-CeO 2 ) and different amounts of (1, 4, 8, and 12% Co) cobalt-doped CeO 2 nanoparticles (Co-CeO 2 NPs) with particle sizes between 4 and 13 nm were synthesized via the microwave-assisted synthesis method. The structural, optical, and morphological studies of S-CeO 2 and Co-CeO 2 were carried out using various techniques. The shifts in the conduction band and valence band were found to cause the reduction of the band gap energies of S-CeO 2 and Co-CeO 2 NPs. Moreover, the quenching of photoluminescence intensity with more Co doping showed the enhanced separation of charge carriers. The photocatalytic activities of S-CeO 2 and Co-CeO 2 NPs for methylene blue dye degradation, 4-nitrophenol reduction, and their photoantibacterial properties under visible-light irradiation were investigated. Findings showed that, due to the lower band gap energy (2.28 eV), more than 40% of both photocatalytic activities were observed for 12% Co-CeO 2 NPs. On the other hand, higher antibacterial impact in the presence of light shows that the Co doping has a considerable influence on the photoantibacterial response of Co-CeO 2 . Therefore, microwave-assisted synthesized CeO 2 and Co-CeO 2 NPs have shown potential in photocatalytic dye degradation, chemical reduction, and photoantibacterial activities.

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Performance evaluation of Bi/Zn‐impregnated commercial TiO₂ nanoparticles for photocatalytic nitrobenzene decomposition

Mishra,

Chakinala,

Chakinala

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDCommercial TiO2 nanoparticles were subjected to modification through Bi and Zn metal doping. The resulting catalysts were comprehensively characterized, and their performance was then reviewed for removal of model pollutant nitrobenzene in water.RESULTSAmidst the synthesized catalysts, the co‐doping of Bi/Zn (0.25:0.75 wt%) demonstrated the best photocatalytic degradation activity, achieving 95% degradation within 90 min of reaction time, with 2.99 × 10−2 min−1 rate constant value. The involvement of different radicals during the degradation process was elucidated by employing appropriate radical scavengers. Furthermore, the degradation results were investigated applying the first‐order kinetic model, leading to the determination of reaction rate constants and initial rates of the degradation process.CONCLUSIONAn improved photocatalytic activity was observed with metal doping due to the synergistic effect of doped metals with commercial TiO2 and profound charge transfer among them. It was observed that performance was increased with temperature rise in the practical range of application, that is, 5–20 °C. This behavior was due to high rate of movement of charge carriers. Further, involvement and functioning of various radical species such as h+, OH− and O2− in nitrobenzene degradation were successfully established using appropriate radical scavengers. © 2024 Society of Chemical Industry (SCI).

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Nanocomposites for visible light photocatalysis

Cited by 15 publications

References 64 publications

Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)₃

Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)₃

Visible-Light-Induced Photocatalytic and Photoantibacterial Activities of Co-Doped CeO₂

Performance evaluation of Bi/Zn‐impregnated commercial TiO₂ nanoparticles for photocatalytic nitrobenzene decomposition

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Nanocomposites for visible light photocatalysis

Cited by 15 publications

References 64 publications

Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)3

Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)3

Visible-Light-Induced Photocatalytic and Photoantibacterial Activities of Co-Doped CeO2

Performance evaluation of Bi/Zn‐impregnated commercial TiO2 nanoparticles for photocatalytic nitrobenzene decomposition

Contact Info

Product

Resources

About

Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)₃

Impact of Co-Doping on the Visible Light-Driven Photocatalytic and Photoelectrochemical Activities of Eu(OH)₃

Visible-Light-Induced Photocatalytic and Photoantibacterial Activities of Co-Doped CeO₂

Performance evaluation of Bi/Zn‐impregnated commercial TiO₂ nanoparticles for photocatalytic nitrobenzene decomposition