2D/2D nitrogen-doped graphitic carbon nitride/cobalt sulfide nanostructures for fast photodegradation of methylene blue dye and real industrial sewage effluents

Vuggili, Sai Bhargava; Gaur, Umesh; Tyagi, Tushar; Sharma, Manu

doi:10.1039/d2va00208f

Cited by 8 publications

(1 citation statement)

References 79 publications

(132 reference statements)

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“…The superiority of photocatalytic techniques in wastewater treatment lies in their advantages over traditional methods, such as rapid oxidation, the absence of multi-ring products, oxidation of pollutants in the ppb range, etc. Cobalt sulfide with different chemical formulas, such as CoS 2 , CoS, Co 9 S 8 , Co 3 S 4 , Co 1−x S, has recently gained considerable attention due to its applications [14][15][16][17][18][19] [ [60][61][62], including electrocatalysts for oxygen evolution reactions, electrode materials for rechargeable lithium batteries, alkaline rechargeable batteries, magnetic materials, solar cells, hydrogen storage materials, and visible light photocatalysts. In this study, we focus on the photocatalytic degradation of methylene blue using a composite of palladium oxide (PdO) and cobalt sulfide (CoS).…”

Section: Introductionmentioning

confidence: 99%

Heterojunction PdO/CoS as a High-Performance Visible-Light Active Photocatalyst Elimination of Methylene Blue from Aqueous Media

Alinezhad,

Fazaeli,

Moghadamzadeh

et al. 2024

Catal Surv Asia

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In this research, the photocatalytic degradation of methylene blue dye was investigated using cobalt sulfide and palladium oxide nanoparticles, as well as the composite PdO/CoS, under visible light irradiation. The structural and morphological properties were determined using X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analysis, Mott-Schottky analysis, and transmission electron microscopy (TEM). The hexagonal structure was observed for cobalt sulfide, and the XRD analysis revealed a multi-faceted structure for the composite. The Mott-Schottky analysis confirmed the formation of a p-n heterojunction, and the flat band potential values for the n-type and p-type semiconductors were found to be -1 and 1.3, respectively. The bandgap of the composite was determined to be 3 eV using Diffuse Reflectance Spectroscopy (DRS). Various conditions such as temperature and pH, as well as the percentage of palladium doping, significantly influenced the degradation of methylene blue. Both CoS and PdO alone exhibited some degradation ability, but when palladium oxide was deposited on cobalt sulfide to form the composite, a remarkable 91% degradation efficiency was achieved. When 0.1 grams of the synthesized composite was used for 90 minutes, it successfully degraded 91% of methylene blue with an initial concentration of 10 ppm. In the Design of Experiments (DOE) approach, the optimum conditions for this research were found to be a catalyst mass of 0.06 g, an initial dye concentration of 8 ppm, and 2% palladium doping at pH 10, resulting in a 92.38% degradation efficiency in 110 minutes. To model the degradation of methylene blue using the synthesized composite, the Fritz-Schlunder and Koble-Corrigan models achieved the highest correlation coefficients (0.995 and 0.992, respectively) and the lowest error functions (0.024, 0.0008) and (0.032, 0.002), respectively. Additionally, the Langmuir-Hinshelwood and Intra-particle diffusion control kinetic models showed the highest correlation coefficient (98%). In summary, the study demonstrated that the PdO/CoS composite exhibited excellent photocatalytic activity for methylene blue degradation, and the optimized conditions resulted in high degradation efficiency. The proposed kinetic models provided valuable insights into the degradation mechanism of methylene blue using the synthesized composite.

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Section: Introductionmentioning

confidence: 99%

Heterojunction PdO/CoS as a High-Performance Visible-Light Active Photocatalyst Elimination of Methylene Blue from Aqueous Media

Alinezhad,

Fazaeli,

Moghadamzadeh

et al. 2024

Catal Surv Asia

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Facile construction of efficient WO3/V2O5 coupled g-C3N4 ternary composite photocatalyst for environmental emergent aqueous pollutant degradation: Stability, degradation reaction pathway and effect of pH evaluation

Shanthini,

Manivannan,

Govindan

et al. 2024

Environ Geochem Health

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Photo-catalytic removal of rhodamine B by nickel doped graphitic carbon nitride: anomalous dependence of removal efficiency on carrier recombination

Chauhan,

Dhariwal,

Parashar

et al. 2024

J IRAN CHEM SOC

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2D/2D nitrogen-doped graphitic carbon nitride/cobalt sulfide nanostructures for fast photodegradation of methylene blue dye and real industrial sewage effluents

Abstract: Nitrogen-doped g-C3N4/CoS nanocomposites have been synthesized using a facile polycondensation-hydrothermal method and showed improved photocatalytic activity for the degradation of MB dye and industrial real samples with good photostability.

Cited by 8 publications

References 79 publications

Heterojunction PdO/CoS as a High-Performance Visible-Light Active Photocatalyst Elimination of Methylene Blue from Aqueous Media

Heterojunction PdO/CoS as a High-Performance Visible-Light Active Photocatalyst Elimination of Methylene Blue from Aqueous Media

Facile construction of efficient WO3/V2O5 coupled g-C3N4 ternary composite photocatalyst for environmental emergent aqueous pollutant degradation: Stability, degradation reaction pathway and effect of pH evaluation

Photo-catalytic removal of rhodamine B by nickel doped graphitic carbon nitride: anomalous dependence of removal efficiency on carrier recombination

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