Photocatalytic degradation of rhodamine B using Nb2O5 synthesized with different niobium precursors: Factorial design of experiments

Ücker, Cátia Liane; Goetzke, Vitor; Almeida, Suelen R.; Moreira, Eduardo Ceretta; Ferrer, Mateus M.; Jardim, Pedro Lovato Gomes; Moreira, Mário L.; Raubach, Cristiane W.; Cava, Sergio

doi:10.1016/j.ceramint.2021.04.066

Cited by 35 publications

(17 citation statements)

References 51 publications

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“…Wolski et al [14] reported a 51% degradation of Rhodamine B in 30 min using Nb 2 O 5 with hydrogen peroxide, observing similar results, in terms of degradation efficiency, with the photocatalytic system at lower dye concentration. This appreciation is in good agreement with the findings documented by Ucker et al [15].…”

Section: Introductionsupporting

confidence: 94%

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Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment

Troncoso

Tonetto

2021

Sustain Environ Res

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In this work, the degradation of methylene blue (MB) in aqueous solution by a heterogeneous Fenton-like process was studied. Nb2O5 supported on an anodized aluminum monolith was used as catalyst. The Nb2O5 coating generated during the catalyst synthesis was uniform and porous, with a thickness of 7 μm. Response surface methodology was used to study the relationship between process variables and MB degradation and chemical oxygen demand (COD) reduction. The optimal operating conditions were: initial MB concentration of 45 mg L− 1, initial H2O2 concentration in the reaction medium of 40 mM, catalyst loading of 7.85 $$ {\mathrm{kg}}_{{\mathrm{Nb}}_2{\mathrm{O}}_5} $$ kg Nb 2 O 5 m− 3, and pH 4, reaching a MB degradation of 98% and a COD reduction of 79% at 150 min. The high activity of the Nb2O5 monolith catalyst remained constant after 10 catalytic tests.

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Section: Introductionsupporting

confidence: 94%

“…Under optimal conditions, the decolorization of MB follows pseudo first-order kinetics according to Eq. ( 10) [15]:…”

Section: Kinetic Modelmentioning

confidence: 99%

Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment

Troncoso

Tonetto

2021

Sustain Environ Res

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“…All samples showed high photocatalytic activity, reaching a maximum percentage of dye degradation of 100% and minimum of 72% in a period of 50 min, using the sample treated at 800 and 500°C, respectively. Figure 4B shows the kinetics of RhB degradation in the presence of each sample of NaNbO 3 .The reaction rate constant (k) was determined using the linear relationship, −ln(C/C 0 ) = kt, where t is the time in minutes 1 . The results indicate that the dye degradation follows the pseudo‐first order kinetics and that the sample treated at 800°C has a dye removal rate of 3.09, 2.89 and 1.5 times greater than the sample treated at 500°C, 600°C and 700°C, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 4B shows the kinetics of RhB degradation in the presence of each sample of NaNbO 3 .The reaction rate constant (k) was determined using the linear relationship, −ln(C/C 0 ) = kt, where t is the time in minutes. 1 The results indicate that the dye degradation follows the pseudo-first order kinetics and that the sample treated at 800 • C has a dye removal rate of 3.09, 2.89 and 1.5 times greater than the sample treated at 500 • C, 600 • C and 700 • C, respectively.…”

Section: Photocatalytic Activitymentioning

confidence: 88%

“…Therefore, it is necessary that they receive the appropriate treatment to be degraded into harmless substances or less toxic to the environment and to humans. Among the different treatment methods, the advanced oxidative processes have received increasing attention, because they can totally or partially degrade compounds that are difficult to degrade, 1 mainly originating from the textile and pharmaceutical industry.…”

Section: Introductionmentioning

confidence: 99%

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Fast synthesis of NaNbO3 nanoparticles with high photocatalytic activity for degradation of organic dyes

et al. 2022

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NaNbO3 nanoparticles were obtained using the microwave‐assisted hydrothermal method followed by heat treatment. It has been shown that heat treatment to increase the crystallinity of the material and modifies particle shape, from nanowires to nanograins. Nanowires with a diameter of approximately 35 nm and a length of tens of micrometers were obtained in the shortest time ever reported in the literature. Particles in the shape of nanograins with a diameter of approximately 35 nm were obtained by burning the nanowires. The photocatalytic activity of the nanoparticles was investigated through the photodegradation of Rhodamine B dye. Electronic structure analysis using density functional theory (DFT) along with experimental techniques was performed to help understand the photocatalytic activity of each sample. The obtained nanoparticles were highly favorable for photocatalytic applications, especially the nanograins, which degraded 100% of the dye in 50 min.

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Alumina Coatings Containing Niobium Pentoxide Polymorphs Prepared by Plasma Electrolytic Oxidation of Aluminum

et al. 2023

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Photocatalytic degradation of rhodamine B using Nb2O5 synthesized with different niobium precursors: Factorial design of experiments

Cited by 35 publications

References 51 publications

Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment

Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment

Fast synthesis of NaNbO3 nanoparticles with high photocatalytic activity for degradation of organic dyes

Alumina Coatings Containing Niobium Pentoxide Polymorphs Prepared by Plasma Electrolytic Oxidation of Aluminum

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