An efficient Z-scheme CdS/g-C3N4 nano catalyst in methyl orange photodegradation: Focus on the scavenging agent and mechanism

Pourshirband, Nafiseh; Nezamzadeh‐Ejhieh, Alireza

doi:10.1016/j.molliq.2021.116543

Cited by 75 publications

(23 citation statements)

References 114 publications

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“…Diffuse Reflectance Spectroscopy (DRS) with a UV-visible spectrophotometer is a technique frequently employed to study the optical properties of solids. In this context, the classical Kubelka-Munk (K-M) model has been extensively employed to understand the light scattering from the surface of semiconductor powder materials [13,14]. Initially, Paul Kubelka and Franz Munk proposed a theoretical approach to study how the colour of a substrate is changed after the application of a paint layer with certain composition and thickness [15].…”

Section: Introductionmentioning

confidence: 99%

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Landi

Segundo

Freitas

et al. 2022

Solid State Communications

267

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Section: Introductionmentioning

confidence: 99%

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Landi

Segundo

Freitas

et al. 2022

Solid State Communications

267

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“…One of the latest studies in the photodegradation of methyl orange has been performed by using CdS/g-C 3 N 4 nanocatalyst under visible light. In this case, more than 85% of methyl orange photodegraded in acidic pH . In another case, Pd/TiO 2 nanospheres were synthesized as a photocatalyst, which degraded 80% of methyl orange under visible irradiation …”

Section: Resultsmentioning

confidence: 99%

“…In this case, more than 85% of methyl orange photodegraded in acidic pH. 71 In another case, Pd/ TiO 2 nanospheres were synthesized as a photocatalyst, which degraded 80% of methyl orange under visible irradiation. 72 Kinetic Study.…”

Section: Methodsmentioning

confidence: 98%

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Razavi

Ghanbari

Salavati‐Niasari

2022

Ind. Eng. Chem. Res.

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Adding noble metals and barium hexaferrite to TiO 2 creates novel magnetic plasmonic nanocomposites with high activity in the photodegradation of organic contaminants. In this work, we have synthesized BaFe 12 O 19 by microwave and sol−gel combustion (using green fuel, glucose) methods and TiO 2 by the sol−gel method. Then, noble metals (Pt and Pd) were deposited on BaFe 12 O 19 /TiO 2 by a reducing agent (glucose: green surfactant) under ultrasound waves. The samples were characterized. On the basis of XRD and SEM results, the composites are highly crystalline and impurity-free. TEM images and BET analysis indicated the samples have a suitable morphology. Furthermore, the magnetic analysis showed the addition of TiO 2 and noble metals to barium hexaferrite has led to the lower coercivity, but the synthesized nanocomposites still have the suitable magnetic properties (M sBaFe12O19/TiO2@Pt = 37, M sBaFe12O19/TiO2/Pd = 34, M rBaFe12O19/TiO2@Pt = 16, M rBaFe12O19/TiO2/Pd = 13.9 emu/g). UV−vis DRS spectra revealed the band gaps of BaFe 12 O 19 /TiO 2 @Pt and BaFe 12 O 19 /TiO 2 /Pd are 3.13 and 3.08 eV, respectively. Finally, BaFe 12 O 19 /TiO 2 @Pt and BaFe 12 O 19 /TiO 2 /Pd nanocomposites were used to degrade the anionic and cationic dyes under visible irradiation within 120 min. The highest percentage of degradation was related to methyl orange, around 96% and 92% by BaFe 12 O 19 /TiO 2 @Pt and BaFe 12 O 19 /TiO 2 /Pd, respectively. Indeed, Pt because of its high work function and electron affinity is more effective in photodegradation.

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“…Equation () and () shown before are known as Williamson–Hall (W–H) equations. [ 54,55 ] To conduct a W–H analysis, it is necessary to create a plot in which the x‐axis represents

4 \sin θ

while the y ‐axis is

β_{h k l} \cos θ

to show all of the dominant orientation peaks for the NiO/CuO nanocrystal composites. This can be seen in Figure .…”

Section: Resultsmentioning

confidence: 99%

Composition Dependence of Structural, Optical, Magnetic and Photodegradation Properties of Nanocrystalline NiO/CuO Heterostructured Powders

Tangcharoen

Klysubun

Kongmark

2022

Physica Status Solidi (a)

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Nanocrystalline NiO/CuO solid solutions and heterostructured powders are prepared by a sol–gel auto combustion method. Herein, the NiO/CuO compounds at various molar ratio, including 100/0, 97.5/2.5, 95/5, 92.5/7.5, 90/10, 80/20, 50/50, 20/80, 10/90, 5/95 and 0/100, are investigated. The structures, morphologies, optical, and magnetic properties of all samples are explored. The detailed structures of the NiO/CuO system are deduced from Rietveld refinements of X‐ray diffraction (XRD) data and the combination of experimental and simulation studies of X‐ray absorption spectroscopy (XAS) spectra. It is found that a small addition of CuO in NiO enhances the formation of rock salt CuxNi1–xO solid solutions with 0 ≤ x ≤ 0.1. The NiO/CuO composites with CuO mole fractions (m) of 20% ≤ m ≤ 95% are affirmed by the coexistence of NiO rock salt and CuO tenorite phases. The composites rich in CuO exhibit strong adsorption in the visible and ultraviolet spectral regions, while the absorption of composites rich in NiO is absent in certain regions of visible and infrared light. In addition, the superparamagnetism of NiO can be tuned to ferromagnetism by a small addition of CuO. The photocatalytic degradation efficiencies of rhodamine B, methylene blue, methyl orange, and methyl red over NiO/CuO reach 92%–97% within a period of 150 min under sunlight irradiation.

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An efficient Z-scheme CdS/g-C3N4 nano catalyst in methyl orange photodegradation: Focus on the scavenging agent and mechanism

Cited by 75 publications

References 114 publications

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Composition Dependence of Structural, Optical, Magnetic and Photodegradation Properties of Nanocrystalline NiO/CuO Heterostructured Powders

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An efficient Z-scheme CdS/g-C3N4 nano catalyst in methyl orange photodegradation: Focus on the scavenging agent and mechanism

Cited by 75 publications

References 114 publications

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe12O19/TiO2 Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light

Composition Dependence of Structural, Optical, Magnetic and Photodegradation Properties of Nanocrystalline NiO/CuO Heterostructured Powders

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Comparative Study on the Role of Noble Metal Nanoparticles (Pt and Pd) on the Photocatalytic Performance of the BaFe₁₂O₁₉/TiO₂ Magnetic Nanocomposite: Green Synthesis, Characterization, and Removal of Organic Dyes under Visible Light