Photocatalytic degradation tests with cobalt-doped molybdenum carbides

Dantas, S.L.A.; Silva, Maitê Medeiros de Santana e; Gomes, Y. F.; Moriyama, André Luís Lopes; Souza, Carlson Pereira de; Corrêa, M.A.

doi:10.1007/s00339-021-04275-5

Cited by 6 publications

(13 citation statements)

References 24 publications

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“…The absorbance results show a decrease in the peak intensity over time, implying a degradation of dye molecules in solution. 2 …”

Section: Resultsmentioning

confidence: 99%

“…1 The catalytic properties of TMCs can be enhanced by incorporating a second metal, e.g., Co/MoC and Ni/MoC, due to an improved surface structure. 2 When β-Mo 2 C is doped with a small amount of Fe, Co, or Ni, the activity and stability for steam reforming of methanol are improved. 3 It was also reported that the addition of Co to Mo 2 C not only improves the activity and selectivity of the Co-doped Mo 2 C catalyst toward CO 2 reduction but also improves its durability.…”

Section: Introductionmentioning

confidence: 99%

“… 4 Transition metals such as Ni, Co, and Fe are often selected as doping agents because of their ability to combine electrical and optical properties into a single material. They provide a substitute level nearly above the conduction band, which improves the absorption of visible light and utilization, and decrease the electron–hole recombination rate, 2 which is useful during photocatalysis. Recently, metal carbides have also emerged as a promising photocatalyst, 5 Co-doped MoC has been reported to photocatalytically degrade Maxilon Blue GRL 300 basic dye.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, metal carbides have also emerged as a promising photocatalyst, 5 Co-doped MoC has been reported to photocatalytically degrade Maxilon Blue GRL 300 basic dye. 2 Since many industries such as textile, plastic, printing, photographic, paper-pulp, paint, and leather factories discard wastes, 6 − 11 such as hazardous chemicals and synthetic dyes (including highly toxic azo dyes), into rivers and streams, pollution of water has increased dramatically. This then affects the aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

“…These catalysis reactions include hydrogenation, biomass conversion, water electrolysis, water gas shift reactions, alcohol electrooxidation, and the removal of contaminants (such as nitrogen and sulfur) through hydrotreating . The catalytic properties of TMCs can be enhanced by incorporating a second metal, e.g., Co/MoC and Ni/MoC, due to an improved surface structure . When β-Mo 2 C is doped with a small amount of Fe, Co, or Ni, the activity and stability for steam reforming of methanol are improved .…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic Decomposition of an Azo Dye Using Transition-Metal-Doped Tungsten and Molybdenum Carbides

2022

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The preparation, characterization, and photocatalytic application of tungsten or molybdenum carbides (Ni-WC, 1 , Co-WC, 2 , Ni-MoC, 3 , Co-MoC, 4 , NiCo-WC, 5 , NiCo-MoC, 6 , NiFe-WC, 7 , and NiFe-MoC, 8 ) doped with transition metals (Fe, Co, and Ni) are reported. These transition-metal carbide (TMC) particles show that the submicrometer globular particles agglomerated to form larger particles, with smaller crystallites present on the surface of the large particles. These crystallite sizes range between 4 and 34 nm (as calculated from X-ray diffraction data) depending on the metal dopant and type of carbide. Oxidation of the metal carbides is evident from the two sets of photoelectron lines present in the X-ray photoelectron spectroscopy (XPS) of the W 4f area. The Mo 3d spectra reveal four sets of photoelectron lines associated with oxidized MoO 2 and MoO 3 as well as Mo 2+ and Mo 3+ associated with MoC 1– x . The XPS of the dopant metals Ni, Co, and Fe also show partial oxidation. The photocatalytic decomposition of Congo red (an azo dye) is used as a model reaction to determine the photocatalytic activities of the transition-metal carbides, which is related to the TMCs’ optical band gap energies.

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“…The absorbance results show a decrease in the peak intensity over time, implying a degradation of dye molecules in solution. 2 …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Photocatalytic Decomposition of an Azo Dye Using Transition-Metal-Doped Tungsten and Molybdenum Carbides

2022

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Photocatalytic Degradation of Maxilon Dye Pollutants using Nano‐Architecture Functional Materials: A Review

Emmanuel,

Adesibikan,

Olawoyin

et al. 2024

ChemistrySelect

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The most essential task in the twenty‐first century is to fight the alarming growing pollution in the aquatic body in which effluent of one of the most colouring dye categories called maxilon dye is a major contributor. This review thus specifically focuses on the use of nanoparticles (NPs) for photocatalytic degradation of maxilon dye contaminants in water bodies. The work empirically presented the performance evaluation of NPs in degrading maxilon dyes under light irradiation alongside the underlying operational photocatalytic degradation mechanism. The stability of NPs was also critically analyzed by looking at the regenerability and reusability of expended NPs. From the study, it was discovered that ⋅OH and O2⋅ played a vital role in the genesis of the oxidizing capacity of NPs for the photocatalytic breakdown of maxilon dye. Moreover, it was found that the degradation performance of most NPs is greater than 80 % and the shortest degradation period is < 1 hour with pseudo‐first‐order (PFO) being the most common kinetic best‐fit to describe the adsorption process that occurred shortly before and during the degradation operation. At the end, knowledge gaps were identified in the area of regenerability, the lifecycle analyses of nano‐photocatalyst fabrication and utilization, cost analysis for industrial scale‐up, maxilon dye ecotoxicological study, and degradation pathways. The findings of this study can open up insightful innovation for readers and industries that are interested in pursuing zero water insecurity.

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Metal Carbides as Photocatalyst for Removal of Organic Effluents from Aqueous Solution

Pandey

Gupta

2022

Impact of COVID-19 on Emerging Contaminants

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Photocatalytic degradation tests with cobalt-doped molybdenum carbides

Cited by 6 publications

References 24 publications

Photocatalytic Decomposition of an Azo Dye Using Transition-Metal-Doped Tungsten and Molybdenum Carbides

Photocatalytic Decomposition of an Azo Dye Using Transition-Metal-Doped Tungsten and Molybdenum Carbides

Photocatalytic Degradation of Maxilon Dye Pollutants using Nano‐Architecture Functional Materials: A Review

Metal Carbides as Photocatalyst for Removal of Organic Effluents from Aqueous Solution

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