Photocatalytic degradation of dyes using synthesized δ-MnO2 nanostructures

Nanostructures of manganese dioxide with unobjectionable properties can be employed to degrade organic waste. The polyol technique was used to create δ-MnO2 nanostructures (NSs), which were then characterized using X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), Scanning...

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Published inChemical Data Collections Vol. 39; p. 100854
Main Authors Khatri, Manita, Gupta, Aakash, Gyawali, Kabita, Adhikari, Anup, Koirala, Agni Raj, Parajuli, Niranjan
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2022
Subjects
Dye degradation
Manganese dioxide
Nanostructure
Photocatalytic reaction
Manganese dioxide
Dye degradation
Nanostructure
Photocatalytic reaction
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Summary:Nanostructures of manganese dioxide with unobjectionable properties can be employed to degrade organic waste. The polyol technique was used to create δ-MnO2 nanostructures (NSs), which were then characterized using X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and Ultraviolet-visible spectroscopy (UV–Vis). The Tauc plot predicted the band gap energy of various molar ratios as 3.02, 2.53, and 2.45 eV. The net charge and stability of δ-MnO2 were pH-dependent, influencing Congo red (CR) and Methylene blue (MB) dyes degradation efficiency. Moreover, various characteristic parameters viz; pH, time, and catalyst dosage on the degradation of dyes were also investigated, and more than 50% CR degradation was observed within 5 min. Photo-degradation study of dyes revealed that MB was degraded effectively at alkaline pH, unlike CR. However, reverse degradation was seen with CR on increasing the dose from 10 mg. [Display omitted]
ISSN:2405-8300
2405-8300
DOI:10.1016/j.cdc.2022.100854