Enhanced photocatalytic activity of hydrothermally grown BiFeO3 nanostructures and role of catalyst recyclability in photocatalysis based on magnetic framework

Dhanalakshmi, Radhalayam; Muneeswaran, M.; Vanga, Pradeep Reddy; Ashok, Mahalingam; Venkatesan, G.

doi:10.1007/s00339-015-9527-z

Cited by 30 publications

(13 citation statements)

References 68 publications

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“…The average grain sizes decrease from 200 to 60 nm after (Nd, Zn) co-doping, suggesting that (Nd, Zn) content of BFO inhibits the grain growth, which can be used to control the growth of grain size. In general, it is believed that the smaller the grain sizes, the more the defects at the grain boundaries, which may have significant influence on the optical and multiferroic properties of the nanoparticles [30,31].…”

Section: Resultsmentioning

confidence: 99%

Structural, Optical and Multiferroic Properties of (Nd, Zn)-Co-doped BiFeO3 Nanoparticles

Shu

Wang

et al. 2017

J Supercond Nov Magn

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The pure BiFeO3(BFO) and (Nd, Zn) co-doped BFO nanoparticles were prepared by a sol-gel method. The crystal structure, optical and multiferroic properties of the samples were systematically investigated. Rietveld refinement showed that the samples crystallized in rhombhohedral R3c structure. In UV-Visible diffuse absorption spectra, an apparent blue shift can be observed after co-doping, which indicates a possible application in photocatalyst and photoconductive devices. Compared with pure BFO sample, the leakage current density of the x = 0.05 sample decreases about three orders of magnitude. The remanent magnetization (Mr) of the x = 0.10 sample reaches 0.105 emu/g while the coercive field (Hc) is as high as 7.0 kOe. The (Nd, Zn) co-doping into BFO nanoparticles has been proved to be an effective way to improve the optical and multiferroic properties.

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Section: Resultsmentioning

confidence: 99%

Structural, Optical and Multiferroic Properties of (Nd, Zn)-Co-doped BiFeO3 Nanoparticles

Shu

Wang

et al. 2017

J Supercond Nov Magn

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“…The Bi 1−x R x FeO 3 (R = Ce, Tb; x = 0.00, 0.05, 0.10 and 0.15) nanostructures were synthesized at 200 °C by hydrothermal process [ 36 , 37 ] by using bismuth nitrate [Bi (NO 3 ) 3 ·5H 2 O], iron nitrate [Fe (NO 3 ) 3 .9H 2 O], cerium nitrate [CeN 3 O 9 ·6H 2 O] and terbium nitrate [Tb (NO 3 ) 3 ·6H 2 O] as precursors. The size and morphology of the prepared nanostructures were investigated using HR-TEM (Jeol 2010, Jeol, Tokyo, Japan).…”

Section: Methodsmentioning

confidence: 99%

Magnetic Field-Assisted Photocatalytic Degradation of Organic Pollutants over Bi1−xRxFeO3 (R = Ce, Tb; x = 0.00, 0.05, 0.10 and 0.15) Nanostructures

2021

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Magnetic-field-accelerated photocatalytic degradation of the phenol red (PR) as a model organic pollutant was studied using rare-earth elements modified BiFeO3 (Bi1−xRxFeO3 (R = Ce, Tb; x = 0.0, 0.05, 0.10 and 0.15); BFO: RE) nanostructures. The nanostructures were prepared via the hydrothermal process and their morphological, structural, functional, optical and magnetic features were investigated in detail. The effect of magnetic fields (MFs) on photocatalysis were examined by applying the different MFs under visible light irradiation. The enhanced photodegradation efficiencies were achieved by increasing the MF up to 0.5T and reduced at 0.7T for the compositions x = 0.10 in both Ce and Tb substituted BFO. Further, mineralization efficiencies of PR, reproducibility of MF-assisted photocatalysis, stability and recyclability of BFO: RE nanostructures were also tested.

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“…BiFeO 3 , as a multiferroic material, has drawn extensive attention in the past decade due to its multiferroic property. Recently, BiFeO 3 has been proposed as a potential photocatalyst due to its narrow E g (2.2–2.5 eV), nontoxicity, and excellent chemical stability. , However, the photocatalytic activity is unsatisfactory because of the rapid recombination of photogenerated electrons and holes in BiFeO 3 materials. , Some methods, such as doping or forming a heterostructure, have been designed to improve the photocatalytic activity of BiFeO 3 . Among these methods, doping is a simple and effective method to promote the separation of photo-generated electrons and holes by introducing an impurity level or tailoring the E g .…”

Section: Regression On E G Ssa and Cs Of Abo3-type Perovskitesmentioning

confidence: 99%

“…Recently, BiFeO 3 has been proposed as a potential photocatalyst due to its narrow E g (2.2−2.5 eV), nontoxicity, and excellent chemical stability. 43,44 However, the photocatalytic activity is unsatisfactory because of the rapid recombination of photogenerated electrons and holes in BiFeO 3 materials. 45,46 Some methods, such as doping or forming a heterostructure, have been designed to improve the photocatalytic activity of BiFeO 3 .…”

Section: Regression Onmentioning

confidence: 99%

Multiobjective Stepwise Design Strategy-Assisted Design of High-Performance Perovskite Oxide Photocatalysts

Tao

Chang

et al. 2021

J. Phys. Chem. C

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The rapid discovery of high-performance photocatalysts is one of the challenges in the field of photocatalysis research. Here, a multiobjective stepwise design strategy is developed to accelerate the design of potential ABO 3type perovskites with enhanced photocatalytic activity. The strategy includes model building, stepwise screening, and prediction of the hydrogen production rate (R H 2 ) of candidate perovskites. Based on the strategy, 35 candidate perovskites with a high specific surface area (SSA) (>60 m 2 g −1 ), a suitable bandgap (E g ) (1.4−2.6 eV), and a small crystallite size (CS) (<36 nm) are proposed. The predicted results of R H 2 of the candidates show they have high R H 2 (>6000 μmol h −1 g −1 ). The statistical analysis results reveal that a suitable E g is more likely to acquire when the main elements at the A site are Bi, La, and Pr, and those at the B site are Fe, Ti, and Mn. The perovskites prepared using the sol−gel, polymer complex, combustion method, and lower calcination temperature preferably have a higher SSA and a smaller CS. The relationship between target properties and R H 2 demonstrates that candidate perovskites with E g in the range of 1.9−2.4 eV, CS in the range of 20−32 nm, and a high SSA (>50 m 2 g −1 ) have a higher R H 2 . Furthermore, these models have been developed for online prediction applications.

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Enhanced photocatalytic activity of hydrothermally grown BiFeO3 nanostructures and role of catalyst recyclability in photocatalysis based on magnetic framework

Cited by 30 publications

References 68 publications

Structural, Optical and Multiferroic Properties of (Nd, Zn)-Co-doped BiFeO3 Nanoparticles

Structural, Optical and Multiferroic Properties of (Nd, Zn)-Co-doped BiFeO3 Nanoparticles

Magnetic Field-Assisted Photocatalytic Degradation of Organic Pollutants over Bi1−xRxFeO3 (R = Ce, Tb; x = 0.00, 0.05, 0.10 and 0.15) Nanostructures

Multiobjective Stepwise Design Strategy-Assisted Design of High-Performance Perovskite Oxide Photocatalysts

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