The influence of preparation parameters on the photocatalytic performance of mixed bismuth titanate-based nanostructures

Pirgholi‐Givi, Gholamreza; Farjami-Shayesteh, S.; Azizian‐Kalandaragh, Yashar

doi:10.1016/j.physb.2019.07.007

Cited by 16 publications

(7 citation statements)

References 61 publications

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“…The Bi 3+ ions located in the (Bi 2 Ti 3 O 10 ) 2– slabs could be substituted by rare-earth ions with similar ion radius, such as La 3+ , Nd 3+ , Pr 3+ , and Sm 3+ to improve its electronic properties . Because of its unique tunable band gap and photovoltaic effect, bismuth titanate-based materials have been increasingly explored as a type of promising photocatalysts for organic pollutant degradation − and hydrogen generation. − So far, very few studies on bismuth titanate for electrocatalysis have been reported. To explore the electrocatalytic potential of metal oxides, here the bismuth titanate-based materials were selected to investigate their electrocatalytic performance for 2e – ORR.…”

Section: Introductionmentioning

confidence: 99%

Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi₄Ti₃O₁₂Nanosheets

Zhang

Dong

et al. 2021

J. Phys. Chem. C

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The electrochemical two-electron oxygen reduction reaction (2e −1 ORR) is a promising route for renewable H 2 O 2 generation as an alternative method to the anthraquinone process. The development of efficient and highly selective catalytic materials is a highly meaningful and challenging subject due to the strong competition from the traditional fourelectron oxygen reduction reaction (4e −1 ORR). Here, we synthesized bismuth titanate (Bi 4 Ti 3 O 12 ) nanosheets as a type of new electrocatalyst for H 2 O 2 generation from 2e −1 ORR. The structure of the Bi 4 Ti 3 O 12 nanosheets is characterized by high-resolution transmission electron microscopy (HRTEM) and X-ray techniques. The electrochemical measurements show that the obtained bismuth titanate (Bi 4 Ti 3 O 12 ), especially the neodymium (Nd)-substituted Bi 4 Ti 3 O 12 , has high catalytic activity and selectivity for O 2 to H 2 O 2 . For the ORR catalyzed by Bi 4 Ti 3 O 12 nanosheets, 83−89% H 2 O 2 selectivity can be achieved in a wide range of potentials, while Nd-substituted Bi 4 Ti 3 O 12 nanosheets afford a higher selectivity of 93−95%. Moreover, in a twochamber H-cell, H 2 O 2 production of 208 mol kg cat −1 can be achieved at 0.36 V under the catalysis of Nd-substituted Bi 4 Ti 3 O 12 for 1 h with a Faraday efficiency of 97.6%. The high O 2 -to-H 2 O 2 catalytic performance could be ascribed to the large surface area and the abundant exposed active sites of the nanosheets.

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Section: Introductionmentioning

confidence: 99%

Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi₄Ti₃O₁₂Nanosheets

Zhang

Dong

et al. 2021

J. Phys. Chem. C

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“…The absorption peak intensities of RB have steadily reduced over time. However, no blueshift has been detected, demonstrating the photodegradation by the aromatic ring‐opening mechanism at the maximal wavelength of RB5 (597 nm) [12] . Initially, the degradation process was conducted without UV light for 15 minutes to prove whether RB5 adsorbed on the catalyst surface.…”

Section: Resultsmentioning

confidence: 99%

“…Besides, biological process methods are prolonged, and electrochemical oxidation is expensive because of the high energy needed [11] . Photocatalytic degradation of textile dyes is a widely used technic for wastewater treatments by developed countries and in the literature as an environmental solution against pollution [12] . The photocatalytic degradation technique is extensively preferred due to manageable process conditions, effective cost, and sustainability in environmental terms [13] .…”

Section: Introductionmentioning

confidence: 99%

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation

et al. 2023

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The photocatalytic performance of TiO2 and ZnO was comparatively studied for photocatalytic degradation of reactive black 5 (RB5) under artificial UVC irradiation. The effect of initial solution pH, catalyst concentration, initial RB5 concentration, purging oxygen rate, stirring rate, and process temperature on the degradation process by TiO2 and ZnO was investigated. In addition, total organic carbon (TOC) analysis has been employed for each parameter to detect the presence of organic intermediates and the photodegradation performance of catalysts simultaneously with the photocatalytic degradation process. The RB5 photodegradation was more rapid in the aqueous medium by TiO2 under UVC irradiation compared to the catalysis by ZnO. On the other hand, the slower photocatalysis by ZnO resulted in generating more organic intermediates. The structural and morphological analyses of photocatalysts TiO2 and ZnO were performed using XRD and FE‐SEM techniques. The UV‐vis spectroscopy measurements supported that the TiO2 demonstrated evidently better photocatalytic activity than ZnO for RB5 degradation.

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“…The bismuth titanate (BTO) nanosheets were synthesized by reacting stoichiometric amounts of bismuth and titanium precursors by microwave irradiation (Pirgholi-Givi, Farjami-Shayesteh & Azizian-Kalandaragh, 2019;Yang et al, 2013). The following reagents were used for the precursors as procured Bismuth nitrate pentahydrate ((Bi (NO 3 ) 3 )5H 2 O, 99%; MERC, Mumbai, Maharashtra), glacial acetic acid (CH 3 COOH, 99%; Spectrachem, Lodi, NJ, USA), titanium tetraisopropoxide ((Ti{OCH(CH 3 ) 2 )} 4 , 98%; Acros Organics, Geel, Belgium), acetylacetone (C 5 H 8 O 2 , 99%; Loba Chemie, Mumbai, Maharashtra) and polyethylene glycol (PEG-6000, 99%; Thermo Fischer Scientific, Waltham, MA, USA) were used in the synthesis.…”

Section: Methodsmentioning

confidence: 99%

“…The samples were thoroughly washed multiple times in water, ethanol and acetone to remove residual material. These were then heated to 500 C for 30 min to remove any organic residues and to obtain a stable crystalline structure (Du et al, 2008;Pirgholi-Givi, Farjami-Shayesteh & Azizian-Kalandaragh, 2019). The samples were then ground to fine powder using a pestle and mortar and stored.…”

Section: Methodsmentioning

confidence: 99%

Microwave assisted synthesis of bismuth titanate nanosheets and its photocatalytic effects

Correya¹,

Nampoori²,

Mujeeb³

2023

PeerJ Materials Science

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Bismuth titanate syntheses using wet chemical methods are comparatively time-consuming and require long durations for completion using the well-studied sol-gel method. In this work, we use microwave initiated combustion method to produce ultra-thin bismuth titanate nanosheets. This method reduces the time required for the synthesis down to minutes, when compared to hours or days in most other methods. The thickness of the synthesized sheets were tuned by adding polyethylene glycol as a capping agent, which in turn affects the band gap and subsequently, their photocatalytic properties. The samples were characterized using x-ray diffraction, transmission electron microscopy and absorption spectrophotometry. Photocatalytic effect of the synthesized bismuth titanate nanosheets on methylene blue dye also studied and variation of band gap depending on thickness of the nanosheets were observed.

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The influence of preparation parameters on the photocatalytic performance of mixed bismuth titanate-based nanostructures

Cited by 16 publications

References 61 publications

Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi₄Ti₃O₁₂Nanosheets

Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi₄Ti₃O₁₂Nanosheets

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation

Microwave assisted synthesis of bismuth titanate nanosheets and its photocatalytic effects

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The influence of preparation parameters on the photocatalytic performance of mixed bismuth titanate-based nanostructures

Cited by 16 publications

References 61 publications

Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi4Ti3O12Nanosheets

Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi4Ti3O12Nanosheets

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO2 And ZnO for Reactive Black 5 Photodegradation

Microwave assisted synthesis of bismuth titanate nanosheets and its photocatalytic effects

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Product

Resources

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Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi₄Ti₃O₁₂Nanosheets

Highly Catalytic Selectivity for Hydrogen Peroxide Generation from Oxygen Reduction on Nd-Doped Bi₄Ti₃O₁₂Nanosheets

Comparative Photocatalytic Activity and Total Organic Carbon Removal Efficiency of TiO₂ And ZnO for Reactive Black 5 Photodegradation