Hydrothermal synthesis of bismuth vanadate-alumina assisted by microwaves to evaluate the photocatalytic activity in the degradation of methylene Blue

Sánchez-Albores, Rocío; Pérez-Sariñana, Bianca Yadira; Avendaño, C. A. Meza; Sebastián, P.J.; Reyes-Vallejo, O.; Robles-Ocampo, J.B.

doi:10.1016/j.cattod.2019.07.044

Cited by 17 publications

(5 citation statements)

References 41 publications

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“…( 7)) takes the form of the pseudo-first-order kinetics model (Eq. ( 8)) for the photocatalytic degradation of a substrate at a low concentration (KC≪ 1) [87][88][89][90][91][92]. Where C (mg/L) is the reactant concentration; r (mg /L•min) is the rate of MB oxidation at time t (min); K is the equilibrium constant for adsorption of MB on the surface of powder (catalyst); and k r is the limiting rate constant, when the catalyst surface reaches maximum coverage.…”

Section: Xrd Analysesmentioning

confidence: 99%

“…Specific photocatalytic activity (P MB ) and photonic efficiency (φ λ ) are the standard expressions of photoactivity according to ISO 10678:2010 [87][88][89][90][91][92]. The photocatalytic activity of the powders is calculated by the difference between the specific degradation rates (R) of the dye in the irradiated solution and the solution kept in the dark (blank).…”

Section: Photocatalytic Decomposition Of Methylene Blue Dyementioning

confidence: 99%

“…Assuming that all incident photons are absorbed by the solid surface of the photocatalyst, then the values found constitutes a lower limit of the real quantum yield [87][88][89][90][91][92]. Therefore, Eqs.…”

Section: Photocatalytic Decomposition Of Methylene Blue Dyementioning

confidence: 99%

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Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite

Oliveira

Batistella²,

Souza

et al. 2021

Powder Technology

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Section: Xrd Analysesmentioning

confidence: 99%

Section: Photocatalytic Decomposition Of Methylene Blue Dyementioning

confidence: 99%

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Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite

Oliveira

Batistella²,

Souza

et al. 2021

Powder Technology

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“…The conduction band (CB) and valance band (VB) edge positions of a SC can be estimate using the concept of the Mulliken electronegativity [39]. The VB and CB edge positions of Fe doped brookite TiO 2 can be determined using a simple approach, where the edge of the CB and VB at the zero point of charge can be predicted using the equations ( 6) and ( 7) respectively.…”

Section: Estimation Of Redox Potentialsmentioning

confidence: 99%

Influence of Fe³⁺ ions on the optical properties and photocatalytic ability of spin coated Fe³⁺ doped brookite TiO₂ thin films

Komaraiah¹,

Radha²,

Sivakumar³

et al. 2022

Funct. Compos. Struct.

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The spin coating process has been used to deposit pure and Fe3+ doped brookite titania films onto glass substrates. In essence, such as films annealed at 500oC are found to be orthorhombic crystal structure with brookite phase. XRD measurements revealed that Fe ions are incorporated into cation sites of TiO2. The crystallite size reduces with the doping of Fe3+ ions. The SEM images show highly uniform, crack free films and the particles size is found to be within the range of 150-200 nm. EDX analysis Fe3+ doped TiO2 films confirmed good stoichiometry of chemical compositions. The Raman spectra of brookite TiO2 exhibit a very strong characteristic band at 153 cm-1. The optical band gap was found to be declined from 3.08 eV to 2.54 eV with adding the Fe ions into TiO2 matrix. The EPR studies approve incorporation of Fe3+ in the crystal lattice of brookite by substituting Ti4+ and generation of defects, and Ti3+ states. Photocatalytic ability of films has been studied by degradation of methyl orange (MO) solution under illumination of visible light. The 7%Fe doped brookite film was exhibited high catalytic activity compared to other pure and doped films.

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“…Methylene blue (MB) dye is a cationic dye with a chemical formula of C 16 H 18 N 3 SCl, and it was used as a chemical analysis indicator, medicine to cyanide poisoning, biological aspects, and aquaculture 9 , 10 . MB dye effluent can severely damage fertile human health, fisheries and agricultural land 11 . Diverse methods are used to remove dyes, including chemical remediation, adsorption, flocculation, biological treatment, electrochemical, precipitation, coagulation, advanced oxidation and photocatalysis 8 , 12 – 14 .…”

Section: Introductionmentioning

confidence: 99%

Electrospun cellulose acetate/activated carbon composite modified by EDTA (rC/AC-EDTA) for efficient methylene blue dye removal

Elmaghraby

Omer

Kenawy

et al. 2023

Sci Rep

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The present study fabricated regenerated cellulose nanofiber incorporated with activated carbon and functionalized rC/AC3.7 with EDTA reagent for methylene blue (MB) dye removal. The rC/AC3.7 was fabricated by electrospinning cellulose acetate (CA) with activated carbon (AC) solution followed by deacetylation. FT-IR spectroscopy was applied to prove the chemical structures. In contrast, BET, SEM, TGA and DSC analyses were applied to study the fiber diameter and structure morphology, the thermal properties and the surface properties of rC/AC3.7-EDTA. The CA was successfully deacetylated to give regenerated cellulose nanofiber/activated carbon, and then ethylenediaminetetraacetic acid dianhydride was used to functionalize the fabricated nanofiber composite. The rC/AC3.7-EDTA, rC/AC5.5-EDTA and rC/AC6.7-EDTA were tested for adsorption of MB dye with maximum removal percentages reaching 97.48, 90.44 and 94.17%, respectively. The best circumstances for batch absorption experiments of MB dye on rC/AC3.7-EDTA were pH 7, an adsorbent dose of 2 g/L, and a starting MB dye concentration of 20 mg/L for 180 min of contact time, with a maximum removal percentage of 99.14%. The best-fit isotherm models are Temkin and Hasely. The outcome of isotherm models illustrates the applicability of the Langmuir isotherm model (LIM). The maximal monolayer capacity Qm determined from the linear LIM is 60.61 for 0.5 g/L of rC/AC3.7-EDTA. However, based on the results from error function studies, the generalized isotherm model has the lowest accuracy. The data obtained by the kinetic models’ studies exposed that the absorption system follows the pseudo-second-order kinetic model (PSOM) throughout the absorption period.

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Hydrothermal synthesis of bismuth vanadate-alumina assisted by microwaves to evaluate the photocatalytic activity in the degradation of methylene Blue

Cited by 17 publications

References 41 publications

Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite

Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite

Influence of Fe³⁺ ions on the optical properties and photocatalytic ability of spin coated Fe³⁺ doped brookite TiO₂ thin films

Electrospun cellulose acetate/activated carbon composite modified by EDTA (rC/AC-EDTA) for efficient methylene blue dye removal

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Hydrothermal synthesis of bismuth vanadate-alumina assisted by microwaves to evaluate the photocatalytic activity in the degradation of methylene Blue

Cited by 17 publications

References 41 publications

Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite

Synthesis of superacid sulfated TiO2 prepared by sol-gel method and its use as a titania precursor in obtaining a kaolinite/TiO2 nano-hybrid composite

Influence of Fe3+ ions on the optical properties and photocatalytic ability of spin coated Fe3+ doped brookite TiO2 thin films

Electrospun cellulose acetate/activated carbon composite modified by EDTA (rC/AC-EDTA) for efficient methylene blue dye removal

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Product

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Influence of Fe³⁺ ions on the optical properties and photocatalytic ability of spin coated Fe³⁺ doped brookite TiO₂ thin films