Long-lived photoinduced charge-carriers in Er3+ doped CaTiO3 for photocatalytic H2 production under UV irradiation

Lozano-Sánchez, L.M.; Méndez-Medrano, María Guadalupe; Colbeau‐Justin, Christophe; Rodríguez-López, José Luis; Hernández-Uresti, D.B.; Obregón, S.

doi:10.1016/j.catcom.2016.06.002

Cited by 18 publications

(4 citation statements)

References 25 publications

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“…On the other hand, a variety of techniques have been applied to engineer the band structure of CaTiO 3 to enhance its photocatalytic capacity by extending its absorbance spectrum to visible light, such as element doping [11], heterojunction/nanocomposite construction [12], structural/phase control [13], and perovskite derivatives [14]. Notably, element doping has attracted considerable attention as a research focus due to its streamlined implementation and meticulous regulation, which aim to reduce the band gap and enhance the photocatalytic efficiency of CaTiO 3 [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Engineering the Electronic Structure towards Visible Lights Photocatalysis of CaTiO3 Perovskites by Cation (La/Ce)-Anion (N/S) Co-Doping: A First-Principles Study

Zhang,

Wang,

Jia

et al. 2023

Molecules

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Cation-anion co-doping has proven to be an effective method of improving the photocatalytic performances of CaTiO3 perovskites. In this regard, (La/Ce-N/S) co-doped CaTiO3 models were investigated for the first time using first-principles calculations based on a supercell of 2 × 2 × 2 with La/Ce concentrations of 0.125, 0.25, and 0.375. The energy band structure, density of states, charge differential density, electron-hole effective masses, optical properties, and the water redox potential were calculated for various models. According to our results, (La-S)-doped CaTiO3 with a doping ratio of 0.25 (LCOS1-0.25) has superior photocatalytic hydrolysis properties due to the synergistic performances of its narrow band gap, fast carrier mobility, and superb ability to absorb visible light. Apart from the reduction of the band gap, the introduction of intermediate energy levels by La and Ce within the band gap also facilitates the transition of excited electrons from valence to the conduction band. Our calculations and findings provide theoretical insights and solid predictions for discovering CaTiO3 perovskites with excellent photocatalysis performances.

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Section: Introductionmentioning

confidence: 99%

Engineering the Electronic Structure towards Visible Lights Photocatalysis of CaTiO3 Perovskites by Cation (La/Ce)-Anion (N/S) Co-Doping: A First-Principles Study

Zhang,

Wang,

Jia

et al. 2023

Molecules

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“…However, despite the sufficient number of scientific research studies in this direction and the large amount of known literature data in the field of photocatalytic decomposition, interest to this direction has not stopped. In the last few years, much attention has been paid to studying the possibilities and prospects in the direction of increasing not only the efficiency of photocatalytic reactions, but also increasing their resistance to external influences and corrosion processes [21][22][23][24][25]. In this regard, one of the avenues in this direction of research is the method of doping titanates with rare-earth elements, which allows not only increasing of their resistance to external influences, but also changing their electronic and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Properties and Photocatalytic Activity of CaTiO3-Based Ceramics Doped with Lanthanum

et al. 2022

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The aim of this work is to study the effect of lanthanum doping on the phase formation processes in ceramics based on CaTiO3, as well as to evaluate the effectiveness of the ceramics as photocatalysts for the decomposition of the organic dye Rhodamine B. The methods used were scanning electron microscopy to evaluate the morphological features of the synthesized ceramics, X-ray diffraction to determine the phase composition and structural parameters, and UV-Vis spectroscopy to determine the optical properties of the ceramics. During the experiments it was found that an increase in the lanthanum dopant concentration from 0.05 to 0.25 mol leads to the formation of the orthorhombic phase La0.3Ca0.7TiO3 and the displacement from the ceramic structure of the impurity phase TiO2, which presence is typical for the synthesized ceramics by solid-phase synthesis. On the basis of the data of the X-ray phase analysis the dynamics of phase transformations depending on concentration of lanthanum was established: CaTiO3/TiO2 → CaTiO3/La2TiO5 → CaTiO3/La0.3Ca0.7TiO3 → La0.3Ca0.7TiO3. During the determination of photocatalytic activity it was found that the formation of La0.3Ca0.7TiO3 phase leads to an increase in the decomposition rate as well as the degree of mineralization.

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“…with high photo and thermal stability are reported as one of the promising materials for photocatalytic processes . Among titanate perovskite-type oxides, CaTiO 3 with appropriate conduction band (CB) and valence band (VB) position, has attracted growing attention in the last decades. − Unfortunately, its high band gap energy (3.5 eV) confines its practical application . In order to effectively utilize solar energy, efforts such as metal doping have been devoted to extend the optical response of CaTiO 3 into the visible spectral range .…”

Section: Introductionmentioning

confidence: 99%

Visible-Light-Driven Nitrogen-Doped Carbon Quantum Dots/CaTiO₃ Composite Catalyst with Enhanced NO Adsorption for NO Removal

Wang

Han

Rao

et al. 2018

Ind. Eng. Chem. Res.

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Nitrogen oxides (NO x ) have attracted extensive concerns as a secondary aerosol precursor in recent years. Solar-induced photocatalytic oxidation is a promising strategy for of NO x removal nowadays. In this contribution, nitrogen-doped carbon quantum dots (N-CQDs)/CaTiO3 composite was synthesized using a facile hydrothermal process. The incorporation of N-CQDs to CaTiO3 facilitates the transfer of electrons and divorce of photogenerated carriers. NO temperature-programmed desorption (NO-TPD) demonstrated that the presence of N-CQDs was conducive to the NO adsorption in comparison with the pristine CaTiO3. The composite catalyst demonstrated much better photocatalytic performance than CaTiO3 and P25 did in regard to gaseous NO removal and NO2 selectivity under visible light irradiation. Both •O2 – and •OH are believed to make a major contribution to NO removal. The role of N-CQDs was unraveled in the photocatalytic reaction of NO elimination over N-CQDs/CaTiO3 samples. This study provides insight into the composite catalyst N-CQDs/CaTiO3 in photocatalytic reactions and applications.

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Long-lived photoinduced charge-carriers in Er3+ doped CaTiO3 for photocatalytic H2 production under UV irradiation

Cited by 18 publications

References 25 publications

Engineering the Electronic Structure towards Visible Lights Photocatalysis of CaTiO3 Perovskites by Cation (La/Ce)-Anion (N/S) Co-Doping: A First-Principles Study

Engineering the Electronic Structure towards Visible Lights Photocatalysis of CaTiO3 Perovskites by Cation (La/Ce)-Anion (N/S) Co-Doping: A First-Principles Study

Synthesis, Properties and Photocatalytic Activity of CaTiO3-Based Ceramics Doped with Lanthanum

Visible-Light-Driven Nitrogen-Doped Carbon Quantum Dots/CaTiO₃ Composite Catalyst with Enhanced NO Adsorption for NO Removal

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Long-lived photoinduced charge-carriers in Er3+ doped CaTiO3 for photocatalytic H2 production under UV irradiation

Cited by 18 publications

References 25 publications

Engineering the Electronic Structure towards Visible Lights Photocatalysis of CaTiO3 Perovskites by Cation (La/Ce)-Anion (N/S) Co-Doping: A First-Principles Study

Engineering the Electronic Structure towards Visible Lights Photocatalysis of CaTiO3 Perovskites by Cation (La/Ce)-Anion (N/S) Co-Doping: A First-Principles Study

Synthesis, Properties and Photocatalytic Activity of CaTiO3-Based Ceramics Doped with Lanthanum

Visible-Light-Driven Nitrogen-Doped Carbon Quantum Dots/CaTiO3 Composite Catalyst with Enhanced NO Adsorption for NO Removal

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Product

Resources

About

Visible-Light-Driven Nitrogen-Doped Carbon Quantum Dots/CaTiO₃ Composite Catalyst with Enhanced NO Adsorption for NO Removal