Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid

Amor, Chaima Ouled; Elghniji, Kais; Elaloui, Elimame

doi:10.1007/s10854-020-04606-x

Cited by 3 publications

(1 citation statement)

References 48 publications

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“…Very recently, some of us provided strong evidence that the LMCT process could enhance the charge separation efficiency, leading to a higher photocurrent and promising photocatalytic performances of an SA-modified Dy-TiO 2 complex. 17 In that work, our attention focused on the quenching effect induced by LMCT on oxygen defect-related emissions. The relation between the LMCT and the photoluminescence (PL) of the Dy 3+ dopant was not among the purposes of the previous paper.…”

Section: Introductionmentioning

confidence: 99%

Salicylic Acid-Modified Sm-TiO₂ for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm³⁺ Dopant

Lakhdar,

Freyria,

Mousdis

et al. 2024

J. Phys. Chem. C

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A salicylic-acid (SA)-modified samarium-doped TiO 2 complex (Sm-TiO 2 /SA) was synthesized via a sol−gel method followed by impregnation. A Raman Fourier transform IR and X-ray photoelectron spectroscopic study showed that SA (as an electron donor) forms a surface complex on the Sm-TiO 2 surface through its phenolic/carboxylic functional groups. In the Sm-TiO 2 /SA complex, a ligand-to-metal charge transfer (LMCT) is active, inducing a marked red-shift in the absorption spectrum of TiO 2 , which extends to 550− 600 nm. The synergetic effect between the LMCT process and the luminescent properties of the lanthanide ions (Sm 3+ ) is discussed and supported by the photoluminescence spectra. Further photocatalytic experiments (under sunlight) and the study of the effect of different scavengers show the presence of competitive reactions between deethylation and cleavage of Rhodamine B (RhB) during its degradation. With the Sm-TiO 2 /SA complexes, the superoxide radical ion (O 2•− ) is the main active species responsible for the N-de-ethylation pathway under sunlight irradiation. The cleavage of RhB by the hydroxyl radical ( • OH) appears, instead, to dominate with the Sm-TiO 2 photocatalysts.

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Section: Introductionmentioning

confidence: 99%

Salicylic Acid-Modified Sm-TiO₂ for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm³⁺ Dopant

Lakhdar,

Freyria,

Mousdis

et al. 2024

J. Phys. Chem. C

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An investigation of the role of samarium on the sol stability, particle growth, optical, and photocatalytic performance of TiO2

Lakhdar

Amor

Mosbah

et al. 2023

J Mater Sci: Mater Electron

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Advances in Hybrid Composites for Photocatalytic Applications: A Review

2022

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Heterogeneous photocatalysts have garnered extensive attention as a sustainable way for environmental remediation and energy storage process. Water splitting, solar energy conversion, and pollutant degradation are examples of nowadays applications where semiconductor-based photocatalysts represent a potentially disruptive technology. The exploitation of solar radiation for photocatalysis could generate a strong impact by decreasing the energy demand and simultaneously mitigating the impact of anthropogenic pollutants. However, most of the actual photocatalysts work only on energy radiation in the Near-UV region (<400 nm), and the studies and development of new photocatalysts with high efficiency in the visible range of the spectrum are required. In this regard, hybrid organic/inorganic photocatalysts have emerged as highly potential materials to drastically improve visible photocatalytic efficiency. In this review, we will analyze the state-of-art and the developments of hybrid photocatalysts for energy storage and energy conversion process as well as their application in pollutant degradation and water treatments.

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Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid

Cited by 3 publications

References 48 publications

Salicylic Acid-Modified Sm-TiO₂ for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm³⁺ Dopant

Salicylic Acid-Modified Sm-TiO₂ for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm³⁺ Dopant

An investigation of the role of samarium on the sol stability, particle growth, optical, and photocatalytic performance of TiO2

Advances in Hybrid Composites for Photocatalytic Applications: A Review

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Improving charge separation, photocurrent and photocatalytic activities of Dy-doped TiO2 by surface modification with salicylic acid

Cited by 3 publications

References 48 publications

Salicylic Acid-Modified Sm-TiO2 for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm3+ Dopant

Salicylic Acid-Modified Sm-TiO2 for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm3+ Dopant

An investigation of the role of samarium on the sol stability, particle growth, optical, and photocatalytic performance of TiO2

Advances in Hybrid Composites for Photocatalytic Applications: A Review

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Product

Resources

About

Salicylic Acid-Modified Sm-TiO₂ for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm³⁺ Dopant

Salicylic Acid-Modified Sm-TiO₂ for Photoluminescence and Photocatalysis under Real Sunlight: Synergistic Effects between Ligand-to-Metal Charge Transfer (LMCT) and Sm³⁺ Dopant