Photocatalytic Degradation of Methylene Blue and Metanil Yellow Dyes Using Green Synthesized Zinc Oxide (ZnO) Nanocrystals

Priyadharshini, S. Shwetha; Shubha, J.P.; Shivalingappa, Jaydev; Adil, Syed Farooq; Kuniyil, Mufsir; Hatshan, Mohammad Rafe; Shaik, Baji; Kavalli, Kiran

doi:10.3390/cryst12010022

Cited by 35 publications

(14 citation statements)

References 67 publications

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“…On the other hand, in the strong acidic medium, the electrostatic repulsion between protonated dye and positively charged catalyst surface cause a reasonable fall in the degradation efficiency. These outcomes were fully supported with previous scientific reports [34,35].…”

Section: Impact Of Solution Phsupporting

confidence: 90%

A study on methylene blue degradation: enhanced photocatalytic activity of Ag-ZnO nanocomposities

Sudhan¹,

Rathiha²,

Balasubramanian³

et al. 2022

Mater. Res. Express

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Silver/Zinc Oxide nanocomposites (Ag-ZnO NCs) were fabricated by varying the weight percentages of both Ag and ZnO for investigating its photocatalytic activity. The structural, morphology and optical response of the prepared nanocomposites were examined with PXRD, FESEM, TEM, EDAX, FT-IR, UV-Vis-DRS and PL spectroscopy. The effect of Ag and ZnO concentrations on these nanocomposites was examinedby analyzing thephotocatalytic activity towards Methylene Blue (MB) dye degradationunder the UV irradiation. The overall results suggested that, AZ1:1 NC achieved better photocatalytic activity than AZ1:2 and AZ2:1 composition. Therefore, the present study demonstrated the viability of the Ag-ZnO NCs in remediation of environmental pollutant and treatment of waste water.

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Section: Impact Of Solution Phsupporting

confidence: 90%

A study on methylene blue degradation: enhanced photocatalytic activity of Ag-ZnO nanocomposities

Sudhan¹,

Rathiha²,

Balasubramanian³

et al. 2022

Mater. Res. Express

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“…Hence, being tough and non selective, the generated reactive oxygen species can result in promising dye degradation at the surface of the photocatalyst. Similar results were noted with ZnO based nanocomposites synthesized using S. lycopersicum, coconut husk, Allium cepa L, Syzygium cumini , Ruellia tuberose, Artocarpus heterophyllus for degradation of chemical dyes such as, Congo red, methylene blue, metanil yellow, crystal violet, and malachite green ( Vidya et al, 2017 ; Rajkumar et al, 2019 ; Preethi et al, 2020 ; Sadiq et al, 2021 ; Vasantharaj et al, 2021 ; Priyadharshini et al, 2022 ). In view of the background, it is evident that Ag mixed phytogenic ZnOPs mediated dye removal can be a powerful strategy for dye contaminated wastewater treatment.…”

Section: Discussionsupporting

confidence: 78%

Catalytic dye degradation by novel phytofabricated silver/zinc oxide composites

et al. 2022

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Phytofabrication of the nanoparticles with exotic shape and size is an attractive area where nanostructures with noteworthy physicochemical and optoelectronic properties that can be significantly employed for photocatalytic dye degradation. In this study a medicinal plant, Plumbago auriculata leaf extract (PALE) was used to synthesize zinc oxide particles (ZnOPs) and silver mixed zinc oxide particles (ZnOAg1Ps, ZnOAg10Ps, ZnO10Ag1Ps) by varying the concentration of the metal precursor salts, i.e. zinc acetate and silver nitrate. The PALE showed significantly high concentrations of polyphenols, flavonoids, reducing sugar, starch, citric acid and plumbagin up to 314.3 ± 0.33, 960.0 ± 2.88, 121.3 ± 4.60, 150.3 ± 3.17, 109.4 ± 2.36, and 260.4 ± 8.90 μg/ml, respectively which might play an important role for green synthesis and capping of the phytogenic nanoparticles. The resulting particles were polydispersed which were mostly irregular, spherical, hexagonal and rod like in shape. The pristine ZnOPs exhibited a UV absorption band at 352 nm which shifted around 370 in the Ag mixed ZnOPs with concomitant appearance of peaks at 560 and 635 nm in ZnO10Ag1Ps and ZnOAg1Ps, respectively. The majority of the ZnOPs, ZnOAg1Ps, ZnOAg10Ps, and ZnO10Ag1Ps were 407, 98, 231, and 90 nm in size, respectively. Energy dispersive spectra confirmed the elemental composition of the particles while Fourier transform infrared spectra showed the involvement of the peptide and methyl functional groups in the synthesis and capping of the particles. The composites exhibited superior photocatalytic degradation of methylene blue dye, maximum being 95.7% by the ZnOAg10Ps with a rate constant of 0.0463 s−1 following a first order kinetic model. The present result clearly highlights that Ag mixed ZnOPs synthesized using Plumbago auriculata leaf extract (PALE) can play a critical role in removal of hazardous dyes from effluents of textile and dye industries. Further expanding the application of these phytofabricated composites will promote a significant complementary and alternative strategy for treating refractory pollutants from wastewater.

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“…Its material is acknowledged as the most crucial photocatalyst that strongly resists chemical and photo corrosions [ 1 ]. Photocatalysis has been considered a facile, green and cost effective method used for the degradation of dyes [ 2 , 3 , 4 ], catalytic process [ 5 ], Solar cells [ 6 ], photodetector application [ 7 ], and antibacterial applications [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

2022

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Zinc oxide thin films have been developed through thermal oxidation of Zinc thin films grown by high impulse power magnetron sputtering (HiPIMS). The influence of various sputtering power on thin film structural, morphological, photocatalytic, and antimicrobial properties was investigated. X-ray diffraction (XRD) analysis confirmed that the crystalline phase of ZnO thin films consists of a hexagonal wurtzite structure. Increasing the sputtering power will lead to intrinsic stress on thin films that promote whisker formation. In this study, whiskers were successfully developed on the thin films without precursors/catalysts and not thermally treated over the Zn melting point. This finding showed that the film phase structure and morphology are significantly affected by sputtering power. It was found that ZnO thin films exhibit high photocatalytic performance under UV irradiation (89.91%) of methylene blue after 300 min of irradiation. The antimicrobial activity on ZnO thin films showed significant inhibition activity (p < 0.05) against E. coli, S. aureus, and C. albicans. However, the whisker formation on ZnO thin films is not accessible to enhance photocatalytic and antimicrobial activity. This study demonstrates that the HiPIMS method through the thermal oxidation process can promote a good performance of ZnO thin films as photocatalyst and antimicrobial agents.

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Photocatalytic Degradation of Methylene Blue and Metanil Yellow Dyes Using Green Synthesized Zinc Oxide (ZnO) Nanocrystals

Cited by 35 publications

References 67 publications

A study on methylene blue degradation: enhanced photocatalytic activity of Ag-ZnO nanocomposities

A study on methylene blue degradation: enhanced photocatalytic activity of Ag-ZnO nanocomposities

Catalytic dye degradation by novel phytofabricated silver/zinc oxide composites

Insight on Photocatalytic and Photoinduced Antimicrobial Properties of ZnO Thin Films Deposited by HiPIMS through Thermal Oxidation

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