Photocatalytic Activity of Suspended and Immobilized Niobium Oxide for Methanol Oxidation and Escherichia coli Inactivation

Morais, Lidiane Alves de; Adán, Cristina; Araújo, Antônio S.; Guedes, Ana Paula M. A.; Marugán, Javier

doi:10.1515/jaots-2016-0209

Cited by 2 publications

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“…The pore size distribution was derived from the non-local density functional theory (NLDFT) method, based on N 2 adsorption-desorption isotherms at 77 K (Figure S2 in Supporting Information). Pore size distribution analysis for Nb 2 O 5 and Nb-O-Mo exhibits that pore distribution of Nb-O-Mo was shifted to larger pore width, because the molybdenum anchored on niobium oxide resulted in [48,49].…”

Section: Resultsmentioning

confidence: 99%

Catalytic Decolorization of Rhodamine B, Congo Red, and Crystal Violet Dyes, with a Novel Niobium Oxide Anchored Molybdenum (Nb–O–Mo)

et al. 2020

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In this work, a new metal-to-metal charge transfer (MMCT) heterogeneous catalyst (Nb–O–Mo) was synthesized by a chemical grafting method under an inert atmosphere. The activity of the covalently anchored oxo-bridged Nb–O–Mo catalyst was estimated for decolorization of Rh B, congo red, and crystal violet dyes in an aqueous solution under fluorescent light. The catalyst was characterized via X-ray diffraction, scanning electron microscopy with energy-dispersive X-ray spectrometer, Fourier-transform infrared, and FT-Raman. The catalytic decolorization was evaluated from the UV spectra of dyes in aqueous solution by changing different factors, including dye concentration, temperature, and catalyst loading. Decolorization percentages were 83%–89%, 86%–95%, 97%–99% for Rh B, Congo Red and Crystal Violet in 1 min at 298 K, showing the best performance among other catalysts. Decolorization efficiency for 50 ppm of Rh B was improved from 92% to 98%, with a temperature increase to 318 K.

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Section: Resultsmentioning

confidence: 99%

Catalytic Decolorization of Rhodamine B, Congo Red, and Crystal Violet Dyes, with a Novel Niobium Oxide Anchored Molybdenum (Nb–O–Mo)

et al. 2020

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“…In recent years, niobium oxide materials have been widely used in many fields, that is, catalysis, ferroelectricity, microelectronics, light refraction, nonlinear optics, piezoelectricity, and Li-ion batteries. [7][8][9][10][11][12][13][14] Among niobium oxide materials, the most typical type is niobium pentoxide (Nb 2 O 5 ), which is an important n-type semiconductor functional material. The most common crystalline phases are hexagonal Nb 2 O 5 , orthorhombic Nb 2 O 5 , monoclinic Nb 2 O 5 , and tetragonal Nb 2 O 5 .…”

Section: Introductionmentioning

confidence: 99%

Topological synthesis of crystalline Ag/T‐Nb₂O₅ nanobelts with enhanced solar photoelectrochemical properties for splitting water

Pan

Jiang

et al. 2021

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The tetragonal phase Nb 2 O 5 (T-Nb 2 O 5 ) nanobelts with preferentially exposed the (010) facet have been successfully prepared for the first time by insitu topological reaction using the KNb 3 O 8 nanobelts as the precursor. Meanwhile, the transformation mechanism of the crystal structure and morphology from the layered KNb 3 O 8 nanobelt to the T-Nb 2 O 5 nanobelt was revealed in detail by using XRD, FE-SEM, TEM, HRTEM, SAED, UV-vis DRS, EDX, XPS, and Raman spectra. In addition, Ag deposited T-Nb 2 O 5 (Ag/T-Nb 2 O 5 ) nanobelts were prepared by photo-reduction reaction. The photoelectrochemical properties of the T-Nb 2 O 5 nanobelts and Ag/T-Nb 2 O 5 nanobelts as a photocatalyst were evaluated by splitting water under simulated sunlight. The results show that the photocurrent density generated by the prepared Ag/T-Nb 2 O 5 sample is 48.1 µA•cm −2 , which is 2.3 times that of the T-Nb 2 O 5 sample, and the prepared tetragonal phase T-Nb 2 O 5 nanobelts produce a photocurrent value 1.5 times that of the contrast orthogonal phase O-Nb 2 O 5 nanosheets. It indicates that the (010) facet of the tetragonal phase Nb 2 O 5 is one of the highest photocatalytic active surfaces, and the visible light utilization efficiency of the T-Nb 2 O 5 nanobelt with Ag deposited on the surface has been significantly improved, which implies that it has potential applications in the field of photocatalysis.

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Photocatalytic Activity of Suspended and Immobilized Niobium Oxide for Methanol Oxidation and Escherichia coli Inactivation

Abstract: Materials based on niobium oxide (Nb

Cited by 2 publications

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Catalytic Decolorization of Rhodamine B, Congo Red, and Crystal Violet Dyes, with a Novel Niobium Oxide Anchored Molybdenum (Nb–O–Mo)

Catalytic Decolorization of Rhodamine B, Congo Red, and Crystal Violet Dyes, with a Novel Niobium Oxide Anchored Molybdenum (Nb–O–Mo)

Topological synthesis of crystalline Ag/T‐Nb₂O₅ nanobelts with enhanced solar photoelectrochemical properties for splitting water

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Photocatalytic Activity of Suspended and Immobilized Niobium Oxide for Methanol Oxidation and Escherichia coli Inactivation

Abstract: Materials based on niobium oxide (Nb

Cited by 2 publications

References 0 publications

Catalytic Decolorization of Rhodamine B, Congo Red, and Crystal Violet Dyes, with a Novel Niobium Oxide Anchored Molybdenum (Nb–O–Mo)

Catalytic Decolorization of Rhodamine B, Congo Red, and Crystal Violet Dyes, with a Novel Niobium Oxide Anchored Molybdenum (Nb–O–Mo)

Topological synthesis of crystalline Ag/T‐Nb2O5 nanobelts with enhanced solar photoelectrochemical properties for splitting water

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Topological synthesis of crystalline Ag/T‐Nb₂O₅ nanobelts with enhanced solar photoelectrochemical properties for splitting water