Template-free synthesis of Fe3O4 nanorod bundles and their highly efficient peroxidase mimetic activity for the degradation of organic dye pollutants with H2O2

Bhuyan, Diganta; Arbuj, Sudhir S.; Saikia, Lakshi

doi:10.1039/c5nj01918d

Cited by 17 publications

(12 citation statements)

References 26 publications

(43 reference statements)

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“…The degradation rate constant of these dyes was compared with other photocatalysts and given in Table S1 ( Supporting information). The CV degradation rate constant for g‐C 3 N 4 /Zn 3 (PO 4 ) 2 composite is 3.8 times higher than TiO 2 /clinoptilolites, 2 times than GO/Ag 2 S, [75] 2.7 times than sodium alginate/ZnO/GO, [76] 3.3 times than SnO 2 [77] and 12 times than α‐Fe 2 O 3 [78] …”

Section: Resultsmentioning

confidence: 99%

“…The CV degradation rate constant for g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite is 3.8 times higher than TiO 2 /clinoptilolites, 2 times than GO/Ag 2 S, [75] 2.7 times than sodium alginate/ZnO/GO, [76] 3.3 times than SnO 2 [77] and 12 times than α-Fe 2 O 3 . [78]…”

Section: X-ray Photoelectron Spectroscopy Analysis and Mechanismsmentioning

confidence: 99%

“…Therefore, the removal of CV dye from waste water is of great concern. [26] For the first time, photocatalytic degradation of CV over ZnO suspended in aqueous solution was carried out by Rao et al [27] After this work, different types of oxide semiconductors such as TiO 2 , [28] ZnO, [29] SnO 2 , [29] Co 3 O 4 , [30] α-Fe 2 O 3 , [31] In 2 O 3 , [32] BiVO 4 / FeVO 4 , [33] SnO 2 /BiOBr, [34] ZnO/AgBr, [35] rGO/TiO 2 /Co 3 O 4 , [36] and rGO/ZnO/TiO 2 [37] etc were developed and used for photocatalytic degradation of aqueous CV dye.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

2021

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The g-C 3 N 4 /Zn 3 (PO 4 ) 2 composites were synthesized in the aqueous medium via chemical precipitation route. The photocatalytic activity of these photocatalysts was evaluated for the degradation of aqueous crystal violet (CV) dye under solar light. The optimum photocatalytic activity of g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite was found for 30 % weight of g-C 3 N 4 . The comparison experiments showed the photocatalytic activity of the g-C 3 N 4 / Zn 3 (PO 4 ) 2 composite increased 2 times compare to bare Zn 3 (PO 4 ) 2 and 1.5 times of g-C 3 N 4 . The enhanced photocatalytic activity originates due to the transfer of photogenerated electrons from the conduction band of g-C 3 N 4 to the Zn 3 (PO 4 ) 2 which makes well-separated electron-hole pairs. The degradation capacity increases with an increase in the pH of the solution up to 8 and then decreases up to 10 and then again starts increasing. The addition of scavengers decreases degradation capacity of g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite in the order of Ethylene diamine tetra-acetic acid-Na 2 (EDTA) > tert-butyl alcohol (TBA) > L-ascorbic acid (AA). The degradation of CV over g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite mainly attributed by the holes. The interfering anions (except Br À ) decrease the degradation capacity of Zn 3 (PO 4 ) 2 whereas in the case of composite no change in the degradation capacity was observed. The recycling experiment for the degradation of CV dye was performed on bare Zn 3 (PO 4 ) 2 and g-C 3 N 4 /Zn 3 (PO 4 ) 2 composite and found better stability and recyclability of the composite material.

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Section: Resultsmentioning

confidence: 99%

Section: X-ray Photoelectron Spectroscopy Analysis and Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

2021

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“…Many organic dyes are toxic and not easily degraded in wastewater treatment plants [ 159 ]. These dyes serve as chromogenic substrates for the nanozymes, with the colour diminishing over time [ 160 , 161 ]. Antibiotics are classified as emerging pseudo-persistent organic pollutants as they are resistant to biodegradation due to their antimicrobial nature [ 162 ].…”

Section: Detection Of Other Persistent Organic Pollutantsmentioning

confidence: 99%

“…Fe 3 O 4 MNPs or nanorods have also been successfully used in the degradation of Rhodamine B (Rh B) [ 175 ], crystal violet [ 160 , 180 ], methylene blue [ 161 , 180 ] and methyl orange [ 180 ] in the presence of hydrogen peroxide with peroxidase activity. Humic-acid-coated ferromagnetic nanoparticles (Fe 3 O 4 10–12 nm in size) were effective for the removal of sulfathiazole from aqueous media in the presence of H 2 O 2 .…”

Section: Environmental Remediation With Nanozymesmentioning

confidence: 99%

Nanozymes for Environmental Pollutant Monitoring and Remediation

Wong¹,

Vuong²,

Chow³

2021

Sensors

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Nanozymes are advanced nanomaterials which mimic natural enzymes by exhibiting enzyme-like properties. As nanozymes offer better structural stability over their respective natural enzymes, they are ideal candidates for real-time and/or remote environmental pollutant monitoring and remediation. In this review, we classify nanozymes into four types depending on their enzyme-mimicking behaviour (active metal centre mimic, functional mimic, nanocomposite or 3D structural mimic) and offer mechanistic insights into the nature of their catalytic activity. Following this, we discuss the current environmental translation of nanozymes into a powerful sensing or remediation tool through inventive nano-architectural design of nanozymes and their transduction methodologies. Here, we focus on recent developments in nanozymes for the detection of heavy metal ions, pesticides and other organic pollutants, emphasising optical methods and a few electrochemical techniques. Strategies to remediate persistent organic pollutants such as pesticides, phenols, antibiotics and textile dyes are included. We conclude with a discussion on the practical deployment of these nanozymes in terms of their effectiveness, reusability, real-time in-field application, commercial production and regulatory considerations.

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Synthesis of Anatase/Brookite Mixed Phase TiO₂ Nanostructures and its Photocatalytic Performance Study

et al. 2021

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The TiO 2 nanostructures were prepared using hydrothermal reaction technique at different reaction temperatures viz., 120°C, 160°C, and 200°C for 24 h. The synthesized TiO 2 nanostructures was characterised by various spectroscopic techniques. XRD indicate the formation of highly crystalline nano size particles of anatase phase of TiO 2 along with minor percentage of brookite phase. Diffuse reflectance UV-Visible spectroscopy depicts the band gap around 3.2 eV. The FE-SEM shows formation of spherical particles having size in the range of 5 to 10 nm, however the small particles tend to agglomerate leading to the formation of submicron size clusters. TEM analysis confirms the formation of nanostructured TiO 2 having size in the range of 5 to 10 nm with distorted spherical shaped morphology. The photocatalytic performance of the synthesized TiO 2 was investigated by observing the degradation of aqueous methylene blue (MB) dye and H 2 generation via water splitting under 400 W mercury vapour lamp respectively. Among the prepared samples, the TiO 2 prepared at 160°C, showed highest MB degradation (97 %) within 1 h of irradiation time. The photocatalytic H 2 generation via water splitting was also investigated and found to be highest for TiO 2 prepared at 160°C, the observed rate of H 2 generation was 3848 μmol/0.1 g in 4 h is almost twelve fold higher than the pure anatase phase.

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Template-free synthesis of Fe₃O₄ nanorod bundles and their highly efficient peroxidase mimetic activity for the degradation of organic dye pollutants with H₂O₂

Abstract: The high surface to volume ratio of Fe3O4 nanorods facilitates the excellent activation of H2O2 for the photo-Fenton-like degradation of crystal violet dye under solar light.

Cited by 17 publications

References 26 publications

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Nanozymes for Environmental Pollutant Monitoring and Remediation

Synthesis of Anatase/Brookite Mixed Phase TiO₂ Nanostructures and its Photocatalytic Performance Study

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Template-free synthesis of Fe3O4 nanorod bundles and their highly efficient peroxidase mimetic activity for the degradation of organic dye pollutants with H2O2

Abstract: The high surface to volume ratio of Fe3O4 nanorods facilitates the excellent activation of H2O2 for the photo-Fenton-like degradation of crystal violet dye under solar light.

Cited by 17 publications

References 26 publications

Synthesis of g‐C3N4, Zn3(PO4)2 and g‐C3N4/Zn3(PO4)2 Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Synthesis of g‐C3N4, Zn3(PO4)2 and g‐C3N4/Zn3(PO4)2 Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Nanozymes for Environmental Pollutant Monitoring and Remediation

Synthesis of Anatase/Brookite Mixed Phase TiO2 Nanostructures and its Photocatalytic Performance Study

Contact Info

Product

Resources

About

Template-free synthesis of Fe₃O₄ nanorod bundles and their highly efficient peroxidase mimetic activity for the degradation of organic dye pollutants with H₂O₂

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Synthesis of g‐C₃N₄, Zn₃(PO₄)₂ and g‐C₃N₄/Zn₃(PO₄)₂ Composites for Application in Photodegradation of Crystal Violet Dye under Solar Light

Synthesis of Anatase/Brookite Mixed Phase TiO₂ Nanostructures and its Photocatalytic Performance Study