High photocatalytic efficiency of α-Fe2O3 - ZnO composite using solar energy for methylene blue degradation

Harijan, Dilip K.L.; Gupta, Sakshi; Ben, Sachin Kumar; Srivastava, Alka; Singh, Jai

doi:10.1016/j.physb.2021.413567

Cited by 29 publications

(16 citation statements)

References 42 publications

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“…In the present investigation, the photocatalytic activity of biosynthesized PtNPs was examined by the degradation of MB under visible light irradiations. Generally, the maximum absorption band corresponding to MB was observed at 664 nm [ 67 , 68 ]. The addition of PtNPs to MB solution resulted in a significant reduction in absorption peaks, indicating MB degradation.…”

Section: Resultsmentioning

confidence: 99%

Optimization of Platinum Nanoparticles (PtNPs) Synthesis by Acid Phosphatase Mediated Eco-Benign Combined with Photocatalytic and Bioactivity Assessments

et al. 2022

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Noble metal nanoparticles (NMNPs) are viable alternative green sources compared to the chemical available methods in several approach like Food, medical, biotechnology, and textile industries. The biological synthesis of platinum nanoparticles (PtNPs), as a strong photocatalytic agent, has proved as more effective and safer method. In this study, PtNPs were synthesized at four different temperatures (25 °C, 50 °C, 70 °C, and 100 °C). PtNPs synthesized at 100 °C were smaller and exhibited spherical morphology with a high degree of dispersion. A series of physicochemical characterizations were applied to investigate the synthesis, particle size, crystalline nature, and surface morphology of PtNPs. The biosynthesized PtNPs were tested for the photodegradation of methylene blue (MB) under visible light irradiations. The results showed that PtNPs exhibited remarkable photocatalytic activity by degrading 98% of MB only in 40 min. The acid phosphatase mediated PtNPs showed strong bacterial inhibition efficiency against S. aureus and E. coli. Furthermore, it showed high antioxidant activity (88%) against 1,1-diphenyl-2-picryl-hydrazil (DPPH). In conclusion, this study provided an overview of the applications of PtNPs in food chemistry, biotechnology, and textile industries for the deterioration of the natural and synthetic dyes and its potential application in the suppression of pathogenic microbes of the biological systems. Thus, it could be used as a novel approach in the food microbiology, biomedical and environmental applications.

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Section: Resultsmentioning

confidence: 99%

Optimization of Platinum Nanoparticles (PtNPs) Synthesis by Acid Phosphatase Mediated Eco-Benign Combined with Photocatalytic and Bioactivity Assessments

et al. 2022

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“…There are two absorption peaks in heterojunction composites around of 370 and 560 nm, which can be known to the attribute of the electronic transition from the VB to the CB due to the absorption of photon, O 2− / Zn 2+ and O 2− / Fe 3+ charge transfer processes, respectively. 1,3,48 UV-vis wavelength range of a-Fe 2 O 3 /ZnO is broader than the pristine semiconductor (ZnO and a-Fe 2 O 3 ) which is correlated with the fabrication of the n-n heterojunction system by combining two semiconductors (ZnO and a-Fe 2 O 3 ). 49,50 The E g value of photocatalyst (Fig.…”

Section: Optical Propertiesmentioning

confidence: 99%

Synergistic effect of modified pore and heterojunction of MOF-derived α-Fe₂O₃/ZnO for superior photocatalytic degradation of methylene blue

et al. 2023

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“…The precursors of ZnO were prepared by dissolving 0.1 M of zinc nitrate in DD water and the nal solution was continuously stirred for 30 min. [23]. After that, the same synthesis procedure of α-Fe 2 O 3 NPs was adopted to synthesize ZnO NPs.…”

Section: Synthesis Of Znomentioning

confidence: 99%

“…depict the timedependent UV-Vis absorption spectra for the photocatalytic decolourization of MB dye molecules using pure α-Fe 2 O 3 , pure ZnO, and their composites respectively. So far, the previous reports have achieved the degradation of MB to 120 mins under solar irradiation [23], and a new improvement is done. From the absorption spectra of all the samples, it is noticed that the intensity of the characteristic peak of the MB dye molecule (~ 664 nm) quenches concerning the irradiation time of the sunlight.…”

Section: Photocatalytic Dye Degradation α-Fe 2 O 3 /Zno Nanocompositesmentioning

confidence: 99%

α-Fe2O3/ZnO nanocomposite as an efficient photocatalyst for wastewater treatment and flexible electronic device applications

Sridha,

Perumalsamy,

Kulandaivel

et al. 2023

Preprint

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In this work, we report the synthesis of pure α-Fe2O3, ZnO, and α-Fe2O3/ZnO nanomaterials by a simple sol-gel method for photocatalytic dye degradation and flexible electronic applications. XRD results reveal that the synthesized samples were rhombohedral and hexagonal wurtzite structures of α-Fe2O3, and ZnO nanoparticles respectively. α-Fe2O3/ZnO composites exhibit the mixed peaks of both α-Fe2O3 and ZnO crystal structures which substantiate the formation of α-Fe2O3/ZnO composites. From the optical studies, the band gaps of α-Fe2O3, ZnO, α-Fe2O3/ZnO composites of (1:1), and (1:2) ratios are calculated as 2.11, 3.14, 2.87, and 2.92 eV respectively. Compared to pure α-Fe2O3 and ZnO nanoparticles, α-Fe2O3/ZnO composites of (1:2) ratio exhibit superior photocatalytic behaviour under the irradiation of the natural sunlight and also show good stability for up to five cycles. From the scavenger studies, it is concluded that hydroxyl radicals are the major contributors to the photocatalytic decolourization of methylene blue dye molecules. The dielectric behaviour of the pure and blended nanoparticles is also investigated in a wide range of frequencies using impedance spectroscopy. The nanoparticles embedded in Polyvinyl Alcohol (PVA) or α-Fe2O3/ZnO/PVA thin films demonstrate a higher dielectric constant (32.68) and lower loss factor (3.32) than pristine PVA. The AC conductivity (σ AC) of α-Fe2O3/ZnO composites of (1:2) ratio is 10− 12 S/cm. These findings indicate the possibilities of using α-Fe2O3/ZnO/PVA composites as a flexible dielectric material for the fabrication of flexible electronic devices.

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High photocatalytic efficiency of α-Fe2O3 - ZnO composite using solar energy for methylene blue degradation

Cited by 29 publications

References 42 publications

Optimization of Platinum Nanoparticles (PtNPs) Synthesis by Acid Phosphatase Mediated Eco-Benign Combined with Photocatalytic and Bioactivity Assessments

Optimization of Platinum Nanoparticles (PtNPs) Synthesis by Acid Phosphatase Mediated Eco-Benign Combined with Photocatalytic and Bioactivity Assessments

Synergistic effect of modified pore and heterojunction of MOF-derived α-Fe₂O₃/ZnO for superior photocatalytic degradation of methylene blue

α-Fe2O3/ZnO nanocomposite as an efficient photocatalyst for wastewater treatment and flexible electronic device applications

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High photocatalytic efficiency of α-Fe2O3 - ZnO composite using solar energy for methylene blue degradation

Cited by 29 publications

References 42 publications

Optimization of Platinum Nanoparticles (PtNPs) Synthesis by Acid Phosphatase Mediated Eco-Benign Combined with Photocatalytic and Bioactivity Assessments

Optimization of Platinum Nanoparticles (PtNPs) Synthesis by Acid Phosphatase Mediated Eco-Benign Combined with Photocatalytic and Bioactivity Assessments

Synergistic effect of modified pore and heterojunction of MOF-derived α-Fe2O3/ZnO for superior photocatalytic degradation of methylene blue

α-Fe2O3/ZnO nanocomposite as an efficient photocatalyst for wastewater treatment and flexible electronic device applications

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Synergistic effect of modified pore and heterojunction of MOF-derived α-Fe₂O₃/ZnO for superior photocatalytic degradation of methylene blue