Visible light photocatalytic activity enhancing of MTiO3 perovskites by M cation (M = Co, Cu, and Ni) substitution and Gadolinium doping

Safari, Sepideh; Ahmadian, Seyed Masoud Seyed; Amani‐Ghadim, Ali Reza

doi:10.1016/j.jphotochem.2020.112461

Cited by 27 publications

(26 citation statements)

References 49 publications

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“…Figure 8 shows the effect of the presence of BQ as the superoxide anion radical scavenger, ammonium oxalate (AO) as the photogenerated hole scavenger, and t-BuOH as the hydroxyl radical scavenger on the AR14 degradation. [41,42] As seen, the greatest reduction in degradation efficiency was in the presence of BQ, implying that Á O 2 À had a key role in the AR14 photocatalytic degradation. Moreover, the AR14 degradation rate slowly decreased in the presence of t-BuOH, signifying that Á OH is not the major active species in the AR14 photocatalytic degradation process.…”

Section: Possible Photocatalytic Mechanism In Ar14 Degradationmentioning

confidence: 69%

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃

Amani‐Ghadim

Ashan²,

Mohseni-Zonouz

et al. 2021

J Chinese Chemical Soc

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Carbon-doped g-C 3 N 4 (CGNS) nanocomposite with Ag 2 O and α-Fe 2 O 3 has been synthesized to improve g-C 3 N 4 photocatalytic activity. The prepared CGNS/Ag 2 O/α-Fe 2 O 3 (GAF [with mass ratio 3:2:1]) nanocomposite exhibits the expanded visible-light absorption region leading to the enhanced photocatalytic performance for Acid Red 14 (AR14) degradation. Besides, it is found that the recombination rate of the charge carriers effectively suppresses the nanocomposite. For a better understanding of the photocatalytic degradation mechanism, the reactions have been performed in the presence of different scavengers. The experiments indicate that superoxide anion radicals possess a more influential role in AR14 degradation in comparison with hydroxyl radicals and holes. The degradation efficiency has been decreased from 94.68 to 85.60 after five consecutive photocatalytic tests implying that the prepared nanocomposite is a stable photocatalyst. In the end, the kinetic study of AR14 degradation on nanocomposite with considering pseudo-first-order kinetics results in a nonlinear empirical kinetic model development for prediction of degradation efficiency of AR14 on nanocomposite.

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Section: Possible Photocatalytic Mechanism In Ar14 Degradationmentioning

confidence: 69%

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃

Amani‐Ghadim

Ashan²,

Mohseni-Zonouz

et al. 2021

J Chinese Chemical Soc

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“…Besides, an increase in β-angle, followed by its decrease, evidences the structural distortion upon the grain growth, which is mainly caused by ion substitution and indicates the poor high-temperature stability of Fe-bearing diopside. In this case, ion substitution provokes an increase in a cell defect concentration, which is beneficial for the capture of photogenerated electrons (Huang et al, 2016;Isari et al, 2018;Safari et al, 2020).…”

Section: Phase Composition Relative Content and Structural Distortion Of Ebfs Ceramicsmentioning

confidence: 99%

Ceramics From Ti-Extraction Blast Furnace Slag and Their Crystalline Phase, Microstructure, and Photocatalytic Performance

You

Sun

et al. 2021

Front. Mater.

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To solve the environmental problems caused by the deposition of Ti-extraction blast furnace slag (EBFS) and to develop the functionality of the slag ceramics, photocatalytic EBFS ceramics were prepared via powder sintering at different temperatures. The phase composition dramatically changed in ceramics sintered at 1,000–1,150°C, but remained constant in samples treated at 1,150–1,200°C, just revealing the variations in the relative content of each phase. The photocatalytic performance of the samples was assessed through the catalytic degradation of Rhodamine B (RhB). Furthermore, it was shown to strongly depend on the relative Fe-bearing diopside content, achieving a maximum in EBFS-1180 ceramic. In this ceramic, the Fe-bearing diopside was found to degrade up to 77% of RhB under UV light irradiation at pH = 2, and its acid corrosion ratio after 24 h was only 0.03%, indicating that EBFS-1180 ceramic had the ability to degrade pollutants in an acidic environment.

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“…Perovskite-type compounds, such as halide perovskites, have been studied as promising photocatalysts for some applications such as CO 2 reduction under UV–visible radiation [ 9 ] and PET–RAFT polymerization under visible and near-infrared radiation [ 10 ], due to their superior properties. Other types, such as perovskite oxides, have shown to be more suitable than their halide counterparts for application as catalysts in the photocatalytic degradation of aqueous solutions of several compounds, including organic dyes, due to their higher water stability [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. These ceramic materials, with the general formula ABO 3 , are well known for their stable and flexible structure that allows the accommodation of several cationic combinations and consequent variety of properties.…”

Section: Introductionmentioning

confidence: 99%

Visible-Light-Driven AO7 Photocatalytic Degradation and Toxicity Removal at Bi-Doped SrTiO3

2022

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In this study, Bi-doped SrTiO3 perovskites (Sr1−xBixTiO3, x = 0, 0.03, 0.05, 0.07 and 0.1) were synthesized using the solid-state method, characterized, and tested as photocatalysts in the degradation of the azo dye acid orange 7 (AO7) under visible light. The perovskites were successfully synthesized, and XRD data showed a predominant, well-crystallized phase, belonging to the cubic perovskite symmetry. For the doped samples, a minority phase, identified as bismuth titanate, was detected. All doped samples exhibited improved photocatalytic activity under visible light, on the degradation of AO7 (10 mg L−1), when compared with the undoped SrTiO3, with an increase in relative Abs484 nm decay from 3.7% to ≥67.8% after 1 h, for a powder suspension of 0.2 g L−1. The best photocatalytic activity was exhibited by the Sr0.95Bi0.05TiO3 perovskite. Reusability studies showed no significant loss in photocatalytic activity under visible light. The final solutions showed no toxicity towards D. magna, proving the efficiency of Sr0.95Bi0.05TiO3 as a visible-light-driven photocatalyst to degrade both the AO7 dye as well as its toxic by-products. A degradation mechanism is proposed.

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Visible light photocatalytic activity enhancing of MTiO3 perovskites by M cation (M = Co, Cu, and Ni) substitution and Gadolinium doping

Cited by 27 publications

References 49 publications

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃

Ceramics From Ti-Extraction Blast Furnace Slag and Their Crystalline Phase, Microstructure, and Photocatalytic Performance

Visible-Light-Driven AO7 Photocatalytic Degradation and Toxicity Removal at Bi-Doped SrTiO3

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Visible light photocatalytic activity enhancing of MTiO3 perovskites by M cation (M = Co, Cu, and Ni) substitution and Gadolinium doping

Cited by 27 publications

References 49 publications

Photocatalytic activity enhancement of carbon‐doped g‐C3N4 by synthesis of nanocomposite with Ag2O and α‐Fe2O3

Photocatalytic activity enhancement of carbon‐doped g‐C3N4 by synthesis of nanocomposite with Ag2O and α‐Fe2O3

Ceramics From Ti-Extraction Blast Furnace Slag and Their Crystalline Phase, Microstructure, and Photocatalytic Performance

Visible-Light-Driven AO7 Photocatalytic Degradation and Toxicity Removal at Bi-Doped SrTiO3

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Product

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Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃

Photocatalytic activity enhancement of carbon‐doped g‐C₃N₄ by synthesis of nanocomposite with Ag₂O and α‐Fe₂O₃