Photocatalytic Degradation of Organic Compound in Water using Synthetic Niobia: Experimental and Theoretical Studies

Nogueira, André E.; Ramalho, Teodorico C.; Oliveira, Luiz C.A.

doi:10.1007/s11244-011-9641-x

Cited by 19 publications

(12 citation statements)

References 15 publications

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“…7. The main peak at m/z = 284.1 amu was assigned to its cationic structure (MB + ) [18] and there is no another peak at low mass, so the decolorization in the dark could not be come from the chemical reaction.…”

Section: Methylene Blue Decolorization By Ag 3 Po 4 -Agi Systemmentioning

confidence: 99%

Photocatalytic decolorization of methylene blue dye by Ag3PO4–AgX (X = Cl−, Br− and I−) under visible light

Amornpitoksuk

Suwanboon

2014

Advanced Powder Technology

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Section: Methylene Blue Decolorization By Ag 3 Po 4 -Agi Systemmentioning

confidence: 99%

Photocatalytic decolorization of methylene blue dye by Ag3PO4–AgX (X = Cl−, Br− and I−) under visible light

Amornpitoksuk

Suwanboon

2014

Advanced Powder Technology

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“…In addition, the peroxo groups were analyzed after the Figure S3). The formation of the stable metal-peroxo group, which may be partially in equilibrium with radical metal-O 2 ⋅ species, has been recognized to play an important role in the photocatalytic process, as these groups can inhibit the recombination of photogeneration charges and interact with photogenerated holes [25,26]. Photogenerated valence band holes (h + ) are trapped at the surface oxygen to form the ⋅ OH radical.…”

mentioning

confidence: 99%

New Approach of the Oxidant Peroxo Method (OPM) Route to Obtain Ti(OH)₄ Nanoparticles with High Photocatalytic Activity under Visible Radiation

Nogueira

Ribeiro

Gorup

et al. 2018

International Journal of Photoenergy

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Environmental problems related to the generation of wastewater contaminated with organic compounds and the emissions of pollutants from fuel burning have become major global problems. Thus, there is a need for the development of alternative and economically viable technologies for the remediation of the affected ecosystems. Therefore, this work describes the preparation and characterization of a Ti(OH)4 catalyst with the modified surface for application in the photodegradation of organic compounds (methylene blue (MB) dye and the drug amiloride (AML)) and in the artificial photosynthesis process. Characterization results reveal that peroxo groups on the surface of the catalyst had a great influence on the optical properties of the Ti(OH)4 and consequently in its photocatalytic property. This catalyst showed a high photocatalytic activity for the degradation of organic pollutants under visible radiation, reaching approximately 98% removal of both the dye and the drug in 150 min of reaction. In addition, the catalyst presented a great potential for the reduction of CO2 under ultraviolet (UV) radiation when compared to P25, which is a classic catalyst used in photocatalytic processes. The highest photocatalytic activity can be attributed to the strong visible light absorption, due to the narrow band gap, and the effective separation of photogenerated electron-hole pairs caused by the peroxo groups on the Ti(OH)4 surface.

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“…Thus, it is possible, for example, to treat the niobium catalyst with hydrogen peroxide, promoting the transformation of the Brönsted acid sites into oxidizing sites (peroxo sites) on its surface increasing the catalytic activity of the semiconductor . Our research group works on the development of these catalysts due to the interest of our country, which is the main producer of niobium with 60% of the world production . In the present work, we report the development of composites based on PHB polymer and niobium oxyhydroxide, with different shapes to be used as photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Use of poly(3‐hydroxybutyrate)/niobium oxyhydroxide nanocomposites in photocatalysis: Effect of preparation methods

Rodrigues

Rocha

Mottin³

et al. 2017

J of Applied Polymer Sci

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In this work, nanocomposites were obtained by the dispersion of niobium oxyhydroxide into a poly(3‐hydroxybutyrate) (PHB) matrix by different preparative methods. These methods led to changes in the polymer morphology and in their photocatalytic properties. Thermal and structural properties of the nanocomposites were investigated using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and Fourier transform infrared spectroscopy (FTIR)–attenuated total reflection (ATR). Scanning electron microscopy images were analyzed in order to observe the different morphologies of nanocomposites as well as the distribution of niobium nanoparticles in the PHB matrix. The chemical interactions between the polymer and niobium nanoparticles were observed in the FTIR–ATR and thermal analyses. The results of TGA and DSC indicated an improvement in the thermal stability of the polymer and the action of inorganic nanoparticles as nucleating agents in the process of heterogeneous nucleation of PHB. The composites exhibited good catalytic activity for the removal of methylene blue dye from an aqueous medium (∼90%) during a photocatalytic process. The different morphologies of PHB/niobium oxyhydroxide composites directly influenced the catalytic activity of the material due to the difference in the dispersion of nanoparticles. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45836.

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Photocatalytic Degradation of Organic Compound in Water using Synthetic Niobia: Experimental and Theoretical Studies

Cited by 19 publications

References 15 publications

Photocatalytic decolorization of methylene blue dye by Ag3PO4–AgX (X = Cl−, Br− and I−) under visible light

Photocatalytic decolorization of methylene blue dye by Ag3PO4–AgX (X = Cl−, Br− and I−) under visible light

New Approach of the Oxidant Peroxo Method (OPM) Route to Obtain Ti(OH)₄ Nanoparticles with High Photocatalytic Activity under Visible Radiation

Use of poly(3‐hydroxybutyrate)/niobium oxyhydroxide nanocomposites in photocatalysis: Effect of preparation methods

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Photocatalytic Degradation of Organic Compound in Water using Synthetic Niobia: Experimental and Theoretical Studies

Cited by 19 publications

References 15 publications

Photocatalytic decolorization of methylene blue dye by Ag3PO4–AgX (X = Cl−, Br− and I−) under visible light

Photocatalytic decolorization of methylene blue dye by Ag3PO4–AgX (X = Cl−, Br− and I−) under visible light

New Approach of the Oxidant Peroxo Method (OPM) Route to Obtain Ti(OH)4 Nanoparticles with High Photocatalytic Activity under Visible Radiation

Use of poly(3‐hydroxybutyrate)/niobium oxyhydroxide nanocomposites in photocatalysis: Effect of preparation methods

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New Approach of the Oxidant Peroxo Method (OPM) Route to Obtain Ti(OH)₄ Nanoparticles with High Photocatalytic Activity under Visible Radiation