Boosting electron population in δ-Bi2O3 through iron doping for improved photocatalytic activity

Sudrajat, Hanggara; Hartuti, Sri

doi:10.1016/j.apt.2019.02.012

Cited by 18 publications

(7 citation statements)

References 33 publications

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“…This allows an efficient movement of photoexcited charge carriers from the bulk via redox reactions. 27 Of course, efficient photocatalysis could be possible because of the effective migration of charge carriers. An efficient visible-light photocatalytic performance of material also depends on the surface morphology, crystallographic phase, and manufacturing techniques.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesized δ-Bi₂O₃ Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Chouke

Dadure²,

Potbhare

et al. 2022

ACS Omega

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Bioinspired delta-bismuth oxide nanoparticles (δ-Bi 2 O 3 NPs) have been synthesized using a greener reducing agent and surfactant via co-precipitation method. The originality of this work is the use of Crinum viviparum flower extract for the first time for the fabrication of NPs, which were further calcined at 800 °C to obtain δ-Bi 2 O 3 NPs. Physicochemical studies such as FTIR spectroscopy and XPS confirmed the formation of Bi 2 O 3 NPs, whereas XRD and Raman verified the formation of the cubic delta (δ) phase of Bi 2 O 3 NPs. However, HRTEM revealed the spherical shape with diameter 10–20 nm, while BET studies expose mesoporous nature with a surface area of 71 m 2 /gm. The band gap for δ-Bi 2 O 3 NPs was estimated to be 3.45 eV, which ensured δ-Bi 2 O 3 to be a promising photocatalyst under visible-light irradiation. Therefore, based on the results of physicochemical studies, the bioinspired δ-Bi 2 O 3 NPs were explored as active photocatalysts for the degradation of toxic dyes, viz ., Thymol blue (TB) and Congo red (CR) under visible-light irradiation. The study showed 98.26% degradation of TB in 40 min and 69.67% degradation of CR in 80 min by δ-Bi 2 O 3 NPs. The photogenerated holes and electrons were found responsible for this enhancement. Furthermore, molecular docking investigations were also performed for δ-Bi 2 O 3 NPs to understand its biological function as New Delhi metallo-β-lactamase 1 (NDM-1) [PDB ID 5XP9 ] enzyme inhibitor, and studies revealed good interaction with various amino acid residues and found good hydrogen bonding with a fine pose energy of −3.851 kcal/mole.

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Section: Introductionmentioning

confidence: 99%

Biosynthesized δ-Bi₂O₃ Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Chouke

Dadure²,

Potbhare

et al. 2022

ACS Omega

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“…Thus, a plethora of synthetic approaches for δ-Bi 2 O 3 in the form of powders, − ,,,,− films, ,− nanosheets, and nanowires was developed. However, stabilization of pure δ-Bi 2 O 3 at room temperature is still a challenge; therefore, the application of the metastable modification is restricted to a low number of examples. − Stabilization of δ-Bi 2 O 3 to room temperature can be achieved by doping, but it must be kept in mind that incorporation of dopants into the crystal lattice of bismuth(III) influences the physical properties and, for example, reduces the oxygen ion conductivity by several orders of magnitude. ,− In the last decades, numerous reports have dealt with the stabilization of δ-Bi 2 O 3 using a variety of main-group elements and transition metals (B, P, Ti, , V, − Fe, Y, , Nb, , Te, Ta, Ce, − Eu, Tb, Dy, , Er, − Tm, Yb, , Lu, and Th) and double-doping (Hf/Zr, Te/V, Y/Yb, Er/Nb, Er/Gd, Ho/Gd, Ho/Dy, Dy/W, Sm/Ce, Sm/Yb, La/Mo, Pr/Mo, Dy/Tm, Gd/Lu, , Yb/Dy, , Eu, or Tb/Th…”

Section: Introductionmentioning

confidence: 99%

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)

et al. 2022

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δ-Bi 2 O 3 :M (M = S, Se, and Re) with an oxygendefective f luorite-type structure is obtained by a coprecipitation m e t h o d s t a r t i n g f r o m t h e b i s m u t h o x i d o c l u s t e r [Bi 38 O 45 (OMc) 24 (dmso) 9 ]•2dmso•7H 2 O (A) in the presence of additives such as Na 2 SO 4 , Na 2 SeO 4 , NH 4 ReO 4 , Na 2 SeO 3 •5H 2 O, and Na 2 SO 3 . The coprecipitation of the starting materials with aqueous NaOH results in the formation of alkaline reaction mixtures, and the cubic bismuth(III)-based oxides Bi 14 O 20 (SO 4 ) ( 1 c ) , B i 1 4 O 2 0 ( S e O 4 ) (2 c ) , B i 1 4 O 2 0 ( R e O 4 . 5 ) (3 c ) , Bi 12.25 O 16.625 (SeO 3 ) 1.75 (4c), and Bi 10.51 O 14.765 (SO 3 ) 0.49 (SO 4 ) 0.51 (5c) are obtained after microwave-assisted heating; formation of compound 5c is the result of partial oxidation of sulfur. The compounds 1c, 2c, 4c, and 5c absorb UV light only, whereas compound 3c absorbs in the visible-light region of the solar spectrum. Thermal treatment of the as-prepared metastable bismuth(III) oxide chalcogenates 1c and 2c at T = 600 °C provides a monotropic phase transition into their tetragonal polymorphs Bi 14 O 20 (SO 4 ) (1t) and Bi 14 O 20 (SeO 4 ) (2t), while compound 3c is transformed into the tetragonal modification of Bi 14 O 20 (ReO 4.5 ) (3t) after calcination at T = 700 °C. Compounds of the systems Bi 2 O 3 −SO x (x = 2 and 3) and Bi 2 O 3 −Re 2 O 7 are thermally stable up to T = 800 °C, whereas compounds of the system Bi 2 O 3 −SeO 3 completely lose SeO 3 . Thermal treatment of 4c and 5c in air results in the oxidation of the tetravalent to hexavalent sulfur and selenium, respectively, upon heating to T = 400−500 °C. The as-prepared cubic bismuth(III)-based oxides 1c−5c were studied with regard to the photocatalytic decomposition of rhodamine B under visible-light irradiation with compound 3c showing the highest turnover and efficiency.

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“…The δ‐Bi 2 O 3 phase usually transforms into the β‐Bi 2 O 3 phase at 650 °C and γ‐Bi 2 O 3 phase at 639 °C with cooling. Recently, many investigations have been published on extending the stability of the cubic δ‐phased Bi 2 O 3 to room temperature via cations doping . Several works on the stability of the δ‐Bi 2 O 3 by introduce of high‐valence cations, such as Re 7+ , Mo 6+ , Ta 5+ , Nb 5+ and V 5+ , have been well documented for photocatalysis purposes.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, many investigations have been published on extending the stability of the cubic δphased Bi 2 O 3 to room temperature via cations doping. [19,20] Several works on the stability of the δ-Bi 2 O 3 by introduce of high-valence cations, such as Re 7 + , Mo 6 + , Ta 5 + , Nb 5 + and V 5 + , [21][22][23][24][25] have been well documented for photocatalysis purposes. However, their photocatalytic activities are not as high as expected, which are mainly attributed to their low potentials of conduction band (CB).…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

Quan

Shi

et al. 2020

ChemistrySelect

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The photocatalysts Bi 2 O 3 :Ce 3 + /Ce 4 + (cerium content 0.2, 0.5, 0.8, and 1.1 wt. %) were prepared via one-pot ethylene glycolassisted solvothermal method. The prepared x Ce-Bi 2 O 3 (x = 0.5, 0.8, 1.1) samples present δ-Bi 2 O 3 phase with space group of Fm-3 m at room temperature, which indicates that the hightemperature cubic phase could be stabilized via Ce doping in Bi 2 O 3 lattices. Moreover, the addition of Ce 3 + /Ce 4 + could change the amount of oxygen vacancies (OVs) and adsorbed oxygen on the surface of photocatalysts. The existence of oxygen vacancies and adsorbed oxygen facilitated the generation of superoxide radicals () and hydroxide radicals (), which were the dominant reactive oxygen species for phenol degradation. The photocatalyst containing 0.8 wt. % cerium presented the highest photoactivity than the other synthesized samples. A photodegradation mechanism is proposed based on scavenger and electron spin resonance studies.[a] T.

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Boosting electron population in δ-Bi2O3 through iron doping for improved photocatalytic activity

Cited by 18 publications

References 33 publications

Biosynthesized δ-Bi₂O₃ Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Biosynthesized δ-Bi₂O₃ Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

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Boosting electron population in δ-Bi2O3 through iron doping for improved photocatalytic activity

Cited by 18 publications

References 33 publications

Biosynthesized δ-Bi2O3 Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Biosynthesized δ-Bi2O3 Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi2O3:M (M = S, Se, and Re)

Photocatalytic Activity of Bi2O3 Enhanced by the Addition of Ce3+/Ce4+ Synthesized by Ethylene Glycol‐assisted Solvothermal Method

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Biosynthesized δ-Bi₂O₃ Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Biosynthesized δ-Bi₂O₃ Nanoparticles from Crinum viviparum Flower Extract for Photocatalytic Dye Degradation and Molecular Docking

Polymorphism and Visible-Light-Driven Photocatalysis of Doped Bi₂O₃:M (M = S, Se, and Re)

Photocatalytic Activity of Bi₂O₃ Enhanced by the Addition of Ce³⁺/Ce⁴⁺ Synthesized by Ethylene Glycol‐assisted Solvothermal Method