Degradation of emerging contaminants: Effect of thermal treatment on nb2o5 as photocatalyst

Abreu, Eduardo; Fidelis, Michel Zampieri; Fuziki, Maria E. K.; Malikoski, R.M.; Mastsubara, M.C.; Imada, Ryosuke; Tuesta, Jose L. Díaz de; Gomes, Helder; Anziliero, M.D.; Baldykowski, B.; Dias, Daniele Toniolo; Lenzi, Giane Gonçalves

doi:10.1016/j.jphotochem.2021.113484

Cited by 20 publications

(9 citation statements)

References 57 publications

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“…From the results of pH PZC , it is possible to notice that CFNb has a pH PZC value of around 6.9, Figure 7. Compared with the literature, the niobium oxide (Nb 2 O 5 ) calcined at 873 K has 7.22 as a pH PZC value [31]. The cobalt ferrite has the value of pH PZC 7.2 when calcined at 873 K [59].…”

Section: Point Of Zero Charge (Phpzc)mentioning

confidence: 93%

“…The Erlenmeyer flasks were placed in an orbital shaker (TE-424, TECNAL) at 200 ± 3 rpm, 298 ± 2 K. After stirring, the suspension was separated from the catalyst using a magnet, and the final pH was measured (pH F ). The pH PZC corresponded to the average of the final pH values which tended to a constant value, regardless of the initial pH value [31,44].…”

Section: Point Of Zero Charge (Phpzc)mentioning

confidence: 98%

“…Niobium pentoxide (Nb 2 O 5 ) and its combinations with other compounds have been studied as photocatalysts. Researchers report the efficiency of the photocatalytic activity of niobium oxide in the degradation of dyes in textile industries [28] and of herbicides such as methylviologen [29], as well as in the reduction of atmospheric pollution [30] and emerging pollutants [31,32].…”

Section: Introductionmentioning

confidence: 99%

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Green Magnetic Nanoparticles CoFe2O4@Nb5O2 Applied in Paracetamol Removal

Oliveira,

Ribas,

Napoli

et al. 2023

Magnetochemistry

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This study describes the synthesis of an innovative nanomaterial (patent application number BR 1020210000317) composed of cobalt ferrite functionalized in niobium pentoxide CoFe2O4@Nb5O2 (CFNb), synthesized via green synthesis using tangerine peel extract. The material emphasizes the combination of a magnetic material (which allows for easy recovery after application) with niobium pentoxide (a metal which is abundant in Brazil). CFNb was applied as a catalyst for the paracetamol (PCT) degradation by photocatalysis. The new materials were characterized through surface and pore analysis (SBET, SEXT, Smic, Vmic, and VTOTAL), photoacoustic spectroscopy (PAS), zero charge point (pHPZC, scanning electron microscopy (SEM/EDS), and X-ray diffraction (XRD). The reaction parameters studied included pH and catalyst concentration. The results indicated that the CFNb nanocatalysts were efficient in the paracetamol degradation, presenting better results in conditions of low pH (close to 2) and low catalyst concentration under irradiation of the 250 W mercury vapor lamp (greater than 28 mW·cm−2) at 60 min of reaction.

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Section: Point Of Zero Charge (Phpzc)mentioning

confidence: 93%

Section: Point Of Zero Charge (Phpzc)mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Green Magnetic Nanoparticles CoFe2O4@Nb5O2 Applied in Paracetamol Removal

Oliveira,

Ribas,

Napoli

et al. 2023

Magnetochemistry

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“…The entire apparatus described was located inside a metallic photocatalysis chamber. The photodegradation of each drug was studied separately, using four different solutions with the following initial concentrations: 5 mg L −1 of ASA, 10 mg L −1 of IBU, 10 mg L −1 of PAR and 50 mg.L −1 of SA [ 10 , 11 ]. Different pH conditions were studied (3, 5, 7 or 9), and the pH of the solution was adjusted with addition of HCl or NaOH solutions.…”

Section: Methodsmentioning

confidence: 99%

Pharmaceutical compounds photolysis: pH influence

Fuziki¹,

Ribas²,

Tusset³

et al. 2023

Heliyon

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“…The authors proved that degradation was accompanied by breakdown of the fused ring structure of E2 and EE2, generating smaller molecular weight by-products. Niobium pentoxide was tested in the UV photodegradation of EE2 and three other pharmaceuticals, acetylsalicylic acid, ibuprofen and paracetamol [167]. The effect of calcination temperature of commercial Nb 2 O 5 , pH and catalyst dosage were assessed.…”

Section: Steroid Hormonesmentioning

confidence: 99%

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

et al. 2022

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Endocrine Disrupting Compounds (EDCs) comprise a class of natural or synthetic molecules and groups of substances which are considered as emerging contaminants due to their toxicity and danger for the ecosystems, including human health. Nowadays, the presence of EDCs in water and wastewater has become a global problem, which is challenging the scientific community to address the development and application of effective strategies for their removal from the environment. Particularly, catalytic and photocatalytic degradation processes employing nanostructured materials based on metal oxides, mainly acting through the generation of reactive oxygen species, are widely explored to eradicate EDCs from water. In this review, we report the recent advances described by the major publications in recent years and focused on the degradation processes of several classes of EDCs, such as plastic components and additives, agricultural chemicals, pharmaceuticals, and personal care products, which were realized by using novel metal oxide-based nanomaterials. A variety of doped, hybrid, composite and heterostructured semiconductors were reported, whose performances are influenced by their chemical, structural as well as morphological features. Along with photocatalysis, alternative heterogeneous advanced oxidation processes are in development, and their combination may be a promising way toward industrial scale application.

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Degradation of emerging contaminants: Effect of thermal treatment on nb2o5 as photocatalyst

Cited by 20 publications

References 57 publications

Green Magnetic Nanoparticles CoFe2O4@Nb5O2 Applied in Paracetamol Removal

Green Magnetic Nanoparticles CoFe2O4@Nb5O2 Applied in Paracetamol Removal

Pharmaceutical compounds photolysis: pH influence

Recent Advances in Endocrine Disrupting Compounds Degradation through Metal Oxide-Based Nanomaterials

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