Mechanism of 2,4-dinitrophenol photocatalytic degradation by ζ-Bi2O3/Bi2MoO6 composites under solar and visible light irradiation

Ma, Jun; Zhang, Long Zhu; Wang, Yue Hua; Lei, Si Liang; Luo, Xu; Chen, Su Hua; Zeng, Guisheng; Zou, Jian; Luo, Sheng; Au, Chak Tong

doi:10.1016/j.cej.2014.04.085

Cited by 69 publications

(9 citation statements)

References 52 publications

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“…The hetero-structured semiconducting nanomaterials are one way to improve the photocatalytic activity of visible light driven photocatalysts due to the photo-generated charged carriers transfer, separation distance, recombination rate, and surface plasmon resonance (SPR), leading to the enhancement of photocatalytic activity of the visible light driven photocatalysts [15][16][17] [19,20], BiOCl/Bi 2 MoO 6 [21,22], TiO 2 /Bi 2 MoO 6 [23,24] and Bi 2 MoO 6 /BiPO 4 [25]. Moreover, the incorporation of metal nanocrystals/semiconductors such as Ag/ZnO [26], Ag/TiO2 [27], Ag/AgCl [28] and Ag/MoO 3 [29] has shown great promise for rising visible light photocatalytic activities due to the localized surface plasmon resonance (LSPR) [26,27].…”

Section: Introductionmentioning

confidence: 99%

Enhanced properties for visible-light-driven photocatalysis of Ag nanoparticle modified Bi2MoO6 nanoplates

Phuruangrat

Putdum

Dumrongrojthanath

et al. 2015

Materials Science in Semiconductor Processing

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Section: Introductionmentioning

confidence: 99%

Enhanced properties for visible-light-driven photocatalysis of Ag nanoparticle modified Bi2MoO6 nanoplates

Phuruangrat

Putdum

Dumrongrojthanath

et al. 2015

Materials Science in Semiconductor Processing

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“…Polynuclear bismuth oxido clusters are known to serve as suitable precursors for the controlled synthesis of metastable bismuth oxide polymorphs such as β-Bi 2 O 3 . , Nine modifications of bismuth oxide are reported to date (α, β, γ, δ, ε, ω, η, ζ, and R) − and metastable polymorphs such as β- and δ-Bi 2 O 3 are promising materials for diverse applications. For example, δ-Bi 2 O 3 is known as the most effective oxide ion conductor of all binary metal oxides , and is suitable as a gas sensor − and a solid electrolyte, , whereas β-Bi 2 O 3 shows the highest photocatalytic activity of all bismuth oxide polymorphs. ,,, In contrast to the UV-light-driven photocatalyst TiO 2 P25 with its large band gap of ≥3 eV (anatase, 3.2 eV; rutile, 3.0 eV), β-Bi 2 O 3 is a visible-light-driven photocatalyst with a band-gap energy in the range of 2.20–2.77 eV. ,,− Because of the promising photocatalytic activity of β-Bi 2 O 3 , long-term stabilization of this metastable modification is of great interest and can be achieved by doping with elements such as magnesium, zinc, aluminum, iron, cobalt, tin, gadolinium, and cerium. − Furthermore, doping of semiconducting materials is reported as an approach to (fine-)tune the properties of visible-light-driven photocatalysts .…”

Section: Introductionmentioning

confidence: 99%

From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi₂O₃:Ce

et al. 2020

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The simultaneous hydrolysis of Bi(NO 3 ) 3 •5H 2 O and Ce(NO 3 ) 3 •6H 2 O results in the formation of novel heterometallic bismuth oxido clusters with the general formula [Bi 38 O 45 (NO 3 ) 24 (DMSO) 28+δ ]:Ce (DMSO = dimethyl sulfoxide; cerium content <1.50%), which is demonstrated by single-crystal X-ray diffraction analysis. The incorporation of cerium into the cluster core is a result of the interplay of hydrolysis and condensation of the metal nitrates in the presence of oxygen. Diffuse-reflectance UV−vis and X-ray photoelectron spectroscopy reveal the presence of Ce IV in the final bismuth oxido clusters as a result of oxidation of the cerium source. The cerium atoms are statistically distributed mainly on the bismuth atom positions of the central [Bi 6 O 9 ] motif of the [Bi 38 O 45 ] cluster core. Hydrolysis and subsequent annealing of the bismuth oxido clusters in the temperature range of 300−400 °C provides β-Bi 2 O 3 :Ce samples with slightly lowered band gaps of approximately 2.3 eV compared to the undoped β-Bi 2 O 3 (approximately 2.4 eV). The sintering behavior of β-Bi 2 O 3 is significantly affected by the cerium dopant. Finally, differences in the efficiency of the asprepared β-Bi 2 O 3 :Ce and undoped β-Bi 2 O 3 samples in the photocatalytic decomposition of the biocide triclosan in an aqueous solution under visible-light irradiation are demonstrated.

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“…Body-centered cubic γ-Bi 2 O 3 ( I23 ) is one out of seven modifications of bismuth(III) oxide reported to date, − and an eighth modification (ζ-Bi 2 O 3 ) was postulated recently based on PXRD studies . Bismuth(III) oxide is a promising material for gas sensors − and solid electrolytes (i.e., δ-Bi 2 O 3 is the most effective oxide ion conductor of all binary metal oxides , ).…”

Section: Introductionmentioning

confidence: 99%

γ-Bi₂O₃ – To Be or Not To Be? Comparison of the Sillenite γ-Bi₂O₃ and Isomorphous Sillenite-Type Bi₁₂SiO₂₀

et al. 2018

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The "controlled" synthesis of metastable γ-BiO by solution based approaches was reported several times recently, but the formation of BiSiO in the presence of trace amounts of silicates renders the results to be questionable. Here, the preparation of the Sillenite γ-BiO and the Sillenite-type BiSiO starting from the polynuclear bismuth oxido cluster [BiO(OCCH)(DMSO)] is reported. γ-BiO crystallizes after calcination at 800 °C of the silicate-free hydrolysis product "[BiO(OH)]" on a silver sheet. Corrosion of the substrate causes contamination with silver, which is not incorporated into the Bi-O lattice, and was removed by treatment with an aqueous KCN-solution. BiSiO was obtained after hydrothermal treatment of the bismuth oxido cluster in the presence of NaOH in glass vessels or NaSiO in a Teflon-lined reactor vessel followed by calcination at 600 °C. PXRD studies, scanning electron microscopy, nitrogen adsorption measurements, IR- and Raman spectroscopy, diffuse UV-vis spectroscopy, and DSC were used for characterization. The phase transition of γ-BiO to give α-BiO occurred slowly in the temperature range of 348-510 °C ( Δ H = 6.57 kJ·mol). The silver-containing γ-BiO exhibits slightly increased Raman modes compared to the silver-free sample due to the SERS effect. In the diffuse UV-vis spectrum γ-BiO exhibits an absorption edge at λ = 485 nm ( E = 2.76 eV), and the contamination with silver results in an additional absorption edge at λ = 572 nm. Silver-free γ-BiO exhibits an absorption edge at λ = 460 nm ( E = 2.83 eV) and BiSiO at λ = 422 nm ( E = 3.16 eV). The photocatalytic activity of the compounds was investigated in the decomposition of aqueous rhodamine B under visible light irradiation, showing silver-containing γ-BiO to be slightly more effective compared to BiSiO and significantly more effective than the silver-free γ-BiO.

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Mechanism of 2,4-dinitrophenol photocatalytic degradation by ζ-Bi2O3/Bi2MoO6 composites under solar and visible light irradiation

Cited by 69 publications

References 52 publications

Enhanced properties for visible-light-driven photocatalysis of Ag nanoparticle modified Bi2MoO6 nanoplates

Enhanced properties for visible-light-driven photocatalysis of Ag nanoparticle modified Bi2MoO6 nanoplates

From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi₂O₃:Ce

γ-Bi₂O₃ – To Be or Not To Be? Comparison of the Sillenite γ-Bi₂O₃ and Isomorphous Sillenite-Type Bi₁₂SiO₂₀

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Mechanism of 2,4-dinitrophenol photocatalytic degradation by ζ-Bi2O3/Bi2MoO6 composites under solar and visible light irradiation

Cited by 69 publications

References 52 publications

Enhanced properties for visible-light-driven photocatalysis of Ag nanoparticle modified Bi2MoO6 nanoplates

Enhanced properties for visible-light-driven photocatalysis of Ag nanoparticle modified Bi2MoO6 nanoplates

From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi2O3:Ce

γ-Bi2O3 – To Be or Not To Be? Comparison of the Sillenite γ-Bi2O3 and Isomorphous Sillenite-Type Bi12SiO20

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From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi₂O₃:Ce

γ-Bi₂O₃ – To Be or Not To Be? Comparison of the Sillenite γ-Bi₂O₃ and Isomorphous Sillenite-Type Bi₁₂SiO₂₀