Synthesis of α-Fe2O3 decorated g-C3N4/ZnO ternary Z-scheme photocatalyst for degradation of tartrazine dye in aqueous media

Balu, Sridharan; Velmurugan, Sethupathi; Palanisamy, Selvakumar; Chen, Shih-Wen; Velusamy, Vijayalakshmi; Yang, Thomas C.-K.; El-Shafey, E.I.

doi:10.1016/j.jtice.2019.03.011

Cited by 102 publications

(32 citation statements)

References 42 publications

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“…To reveal the role of the O V (through Cr or Fe doping and the basic treatment at pH = 13.5) on CeO 2 NPs, we compared the photocatalytic degradation (PCD) rates of three different organic pollutants (i.e., (a) 4-CP, (b) 2,4-DCP, and (c) HCOOH) as representative organic compounds of aromatic (i.e., 4-CP and 2,4-DCP) and aliphatic (HCOOH) compounds in the presence of CeO 2 [43][44][45]. As shown in Figure 2, only the phenolic compounds (i.e., (a) 4-CP and (b) 2,4-DCP) were clearly degraded in all the NPs (CeO 2 , Cr@CeO x , and Fe@CeO x ), while formic acid was not degraded in all.…”

Section: Photocatalytic Degradation Activity Measurementsmentioning

confidence: 99%

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Comparison of Enhanced Photocatalytic Degradation Efficiency and Toxicity Evaluations of CeO2 Nanoparticles Synthesized Through Double-Modulation

et al. 2020

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We demonstrated that Fe/Cr doped and pH-modified CeO2 nanoparticles (NPs) exhibit enhanced photocatalytic performance as compared to bare CeO2 NPs, using photocatalytic degradation. To assess the toxicity level of these double-modified CeO2 NPs on the human skin, they were introduced into HaCaT cells. The results of our conventional cellular toxicity assays (neutral red uptake and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide for assays) indicated that Cr@CeOx NPs prompt severe negative effects on the viability of human cells. Moreover, the results obtained by scanning transmission X-ray microscopy and bio-transmission electron microscope analysis showed that most of the NPs were localized outside the nucleus of the cells. Thus, serious genetic toxicity was unlikely. Overall, this study highlights the need to prevent the development of Cr@CeOx NP toxicity. Moreover, further research should aim to improve the photocatalytic properties and activity of these NPs while accounting for their stability issues.

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Section: Photocatalytic Degradation Activity Measurementsmentioning

confidence: 99%

“…It is known that the bare CeO 2 NPs show two major peaks at~883.7 eV and~901.3 eV for the Ce M 5 -edge and M 4 -edge, respectively. In addition, there are two post edge peaks at~889.1 eV (Y') and 906.7 eV (Y), respectively [43,44]. Another concern is the change in the electronic structure of the NPs that penetrate the cells.…”

Section: Stxm Measurementsmentioning

confidence: 99%

Comparison of Enhanced Photocatalytic Degradation Efficiency and Toxicity Evaluations of CeO2 Nanoparticles Synthesized Through Double-Modulation

et al. 2020

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“…Ternary construction of Z-scheme g-C3N4/ZnO@Fe2O3 synthesized by direct pyrolysis followed by sol-gel method photodegraded of 99.3% tartrazine in 35 min under visible light [84]. The band gap value for g-C3N4, ZnO, ZnO@Fe2O3 and g-C3N4/ZnO@Fe2O3 were 2.7, 3.1, 2.5 and 2.6 eV, respectively (Figure 7e).…”

Section: Figure 6: Hierarchy Of the Progression In Z-scheme Heterojunction From 1 St Generation Tomentioning

confidence: 99%

“…[82](c) Double Z-scheme of Fe2O3@NiFe2O3P-g-C3N4 [83](d) LSV plots of Fe2O3@NiFe2O3P-g-C3N4, Fe3O4 and NiFe2O3P-g-C3N4. [83](e) PL spectra of g-C3N4/ZnO@α-Fe2O3 [84](f) optical band-gap of g-C3N4, ZnO, ZnO@α-Fe2O3 and g-C3N4/ZnO@αFe2O3 nanocomposite [84].…”

Section: Figure 6: Hierarchy Of the Progression In Z-scheme Heterojunction From 1 St Generation Tomentioning

confidence: 99%

Recent Advancement on Ferrite Based Heterojunction for Photocatalytic Degradation of Organic Pollutants: A Review

Shandilya

2021

Materials Research Foundations

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The progress of ferrites and ferrites-based nanocomposites has become extensively popular in the field of photocatalytic wastewater treatment. This class of compound exhibit several fascinating properties related with their high stability, low cost, ease of functionalization, and biocompatibility. Ferrites carry outstanding magnetic behavior that helps in their easy recovery from the aqueous system thus reducing the cost. The morphology and various properties such as magnetic, absorption, optoelectronic of magnetic ferrites can be varied and optimize by applying different synthetic routes and reaction conditions. With this background we have briefly presented and reviewed the latest development in the field of photodegradation of aqueous pollutants using ferrites based heterojunction. Especially, the type-II, Z-scheme and S-scheme based heterojunction for enhanced pollutant degradation under the exposure of light are thoroughly describe. Ferrites have inherent potential in water remediation applications hence many examples were consider to impart valuable knowledge to the readers. Nevertheless, the large-scale utilization of these magnetic nanoparticles still needs to be explored. Therefore, the gaps, challenges and future prospective of ferrites nanoparticles are also explained to unveil the un-scrutinized standard of ferrites nanoparticles.

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“…Therefore, α-Fe 2 O 3 has been extensively used as combined for VLD TiO 2 -based PCs by the hydrothermal assisted technique with the ultrasonic wave's supports. Since, hydrothermal assisted precipitation has applied most effective route among various techniques, to fabricate the effectual NPs and nanocomposites (NCs) samples due to its high purity, simple preparation, stoichiometry control and homogeneous distribution of coupling components [20]. Fortunately, Magnetic PCs might be pro ciently separated and reprocessed by applying an external magnetic eld.…”

Section: Introductionmentioning

confidence: 99%

A Novel α‑Fe2O3/TiO2 heterostructured nanocomposite with Enhanced Visible-light Photocatalytic Performance for Degradation of Organic Pollutant

Kavitha¹,

Ranjith

Jayamani³

2021

Preprint

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A novel heterostructured catalyst of TiO2/α‑Fe2O3 nanocomposite (NC) was successfully fabricated by the facile hydrothermal method and mutual ultrasonication. To characterize the as-fabricated photocatalysts (PCs) by PXRD, FT-IR, HRSEM, HRTEM, UV-Vis DRS absorption, and PL spectra analysis relatively. The optical absorbance of TiO2/α‑Fe2O3 NC was measured in the wavelength range from ~ 320–800 nm and the optical bandgap (Eg) was declined from 3.21 to 2.72 eV. The photocatalytic efficiency of TiO2/α‑Fe2O3 composite catalyst was assayed in the degradation of aqueous methylene blue (MB) dye in the visible-light influence. The results showed that the heterostructured α‑Fe2O3/TiO2 catalyst was much faster and higher removal efficiency of MB dye (~ 92.7 %) than the other photocatalytic degradation of pristine TiO2 (33 %) and α‑Fe2O3 (47.3 %) in 100 min. The enriched photocatalytic efficiency also accredited to enlarged energy harvesting ability, enhanced in the widened absorption in visible-light region, synergistic effects produced a great number of photo-produced electron-hole (e−/h+) separation, stronger oxidation ability by hydroxyl radicals (−OH.) via the interfaces of α‑Fe2O3 dispersed TiO2 heterojunction. All these outcomes specify that the highly stable and recyclable TiO2/α‑Fe2O3 photocatalyst has the possibility of the practical application for wastewater treatment.

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Synthesis of α-Fe2O3 decorated g-C3N4/ZnO ternary Z-scheme photocatalyst for degradation of tartrazine dye in aqueous media

Cited by 102 publications

References 42 publications

Comparison of Enhanced Photocatalytic Degradation Efficiency and Toxicity Evaluations of CeO2 Nanoparticles Synthesized Through Double-Modulation

Comparison of Enhanced Photocatalytic Degradation Efficiency and Toxicity Evaluations of CeO2 Nanoparticles Synthesized Through Double-Modulation

Recent Advancement on Ferrite Based Heterojunction for Photocatalytic Degradation of Organic Pollutants: A Review

A Novel α‑Fe2O3/TiO2 heterostructured nanocomposite with Enhanced Visible-light Photocatalytic Performance for Degradation of Organic Pollutant

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