Synthesis, structural and optical characteristics of Fe3O4/activated carbon photocatalysts to adsorb pesticide waste

Amir, Nurkhaerati; Tahir, Dahlang; Heryanto, Heryanto

doi:10.1007/s10854-023-09910-w

Cited by 20 publications

(9 citation statements)

References 80 publications

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“…UV–visible (UV–vis) spectroscopy (UV-1800 UV–vis spectrophotometer, Shimadzu) was used to determine the absorption ranges of the sample toward the MB and CR pollutants, which were then used to calculate the percentages of degradation, adsorption quantities, and kinetic analyses. Using UV–vis spectroscopy, the wavelength of the absorption edge of the catalyst can also be determined, which can then be used to calculate the bandgap energy value E g using the following equation , E normalg = h c / λ where E g is the bandgap energy (eV), h is Planck’s constant (4.1357 × 10 –15 eV s), c is the speed of light (2.998 × 10 8 m/s), and λ is the wavelength of the sample absorption edge (nm).…”

Section: Experimental Sectionmentioning

confidence: 99%

Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO₂): Kinetics and Adsorption Studies of Methylene Blue and Congo Red

Fajriani,

Heryanto,

Tahir

2023

ACS Omega

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Activated carbon/GeO2 composites were synthesized using the sol–gel method and then used as catalysts for the photodegradation of organic pollutants methylene blue (MB) and congo red (CR). The composites were characterized using an X-ray diffractometer and Fourier transform infrared spectroscopy to analyze the structure and chemical bonds of the composite materials, respectively. The ultraviolet–visible (UV–vis) absorption wavelength ranges of the composites toward the pollutants were 550–700 nm for MB and 450–550 for CR. The band gap energies of the composites were calculated, with the values found to be <4.5 eV. It was shown that the adsorption ability of the composites increased with the irradiation time of the pollutants. Furthermore, the adsorption kinetics data were found to be a good fit to a pseudo-first-order kinetics model.

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Section: Experimental Sectionmentioning

confidence: 99%

Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO₂): Kinetics and Adsorption Studies of Methylene Blue and Congo Red

Fajriani,

Heryanto,

Tahir

2023

ACS Omega

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“…Dye waste can inhibit the biological activity of aquatic plants and animals that live in water, some also have carcinogenic and toxic's effects [2]. Many studies have been conducted to reduce environmental pollution for human life, one of which is a photocatalyst [3,4].…”

Section: Introductionmentioning

confidence: 99%

Highly ordered structure and susceptibility to light absorption of ZnO/calcium phosphate (5%) to enhance the stability of charge diffusion as a methylene blue bond breaker

Abdullah,

Tahir,

Heryanto

et al. 2024

Phys. Scr.

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The composite Zinc oxide/calcium phosphate was successfully prepared using the sol-gel method. The structural and optical properties are observed by using X-Ray Diffraction and Fourier Transform Infra-Red, respectively. The degradation of MB dye is analyzed by using Ultraviolet-Visible spectrometer. The maximum MB degradation is achieved 92.61± 2.7 % and shows the linear correlation to a high optical longitudinal position and enlarged d spacing. Superior photocatalytic activity is demonstrated by ZnO/CP_240 which has a consistent band gap due to its highly ordered structure and susceptibility to light absorption ability, thus triggering better charge diffusion stability. The empirical findings suggest that the introduction of CP at the atomic level into the crystal lattice of ZnO buffer generates a surplus of oxygen vacancies, thereby diminishing the strength of the MB bonding. This, in turn, facilitates the activation of lattice oxygen.

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“…32 The mechanochemical process can stabilize chemical phases, grain repositioning, and crystal defects without using solvents or high temperatures, making it ecosustainable. 33,34 The chemical composition of this nanocomposite was observed and characterized by X-ray fluorescence (XRF), and its structural properties were analyzed by X-ray diffraction (XRD) spectroscopy. The absorption characteristics were identified by vector network analysis spectroscopy; subsequently, the relationship between reflection loss and structural properties was discussed.…”

Section: Introductionmentioning

confidence: 99%

“…The principle of the mechanical alloying process is that the ball transfers its momentum to the unit mass of the nanocomposite per unit of time as the specific power injected creates a mechanochemical reaction . The mechanochemical process can stabilize chemical phases, grain repositioning, and crystal defects without using solvents or high temperatures, making it ecosustainable. , …”

Section: Introductionmentioning

confidence: 99%

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Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

et al. 2023

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Efforts to produce microwave absorber materials that are inexpensive and environmentally friendly have become a means of greening the environment. The breakthrough can be focused on industrial waste and natural materials for functional purposes and how to enhance their performance. We successfully synthesized nickel slag/laterite soil (NS/LS) and nickel slag/iron sand (NS/IS) nanocomposites using a simple mechanical alloying technique, and the electromagnetic (EM) wave absorption capacities of the nanocomposites were measured using a vector network analyzer. The structural properties of the nanocomposites were analyzed by X-ray diffraction spectroscopy, where the results of the analysis showed that NS/IS has the largest crystallite size (15.69 nm) and the highest EM wave absorption performance. The optical properties of the nanocomposites were determined from their Fourier transform infrared spectra using the Kramers–Kronig relation. As determined through a quantitative analysis of the optical properties, the distance between the longitudinal and transversal optical phonon wavenumber positions (Δ(LO – TO) = 65 cm–1) is inversely proportional to the reflection loss. The surface morphologies of the nanocomposites were analyzed by scanning electron microscopy, and the particle diameters were observed by binary image and Gaussian distribution analyses. The nanocomposite surface exhibits a graded-like morphology, which indicates multiple reflections of the EM radiation, consequently reducing the EM interference. The best nanocomposite for an attenuated EM wave achieved a reflection loss of −39.14 dB at 5–8 GHz. A low penetration depth has implications for the electrical charge tuning of the storage and composite magnets. Finally, the EM absorption properties of NS/IS and NS/LS indicate a 2-mm-thick environmentally friendly nanocomposite for EM absorption.

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Synthesis, structural and optical characteristics of Fe3O4/activated carbon photocatalysts to adsorb pesticide waste

Cited by 20 publications

References 80 publications

Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO₂): Kinetics and Adsorption Studies of Methylene Blue and Congo Red

Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO₂): Kinetics and Adsorption Studies of Methylene Blue and Congo Red

Highly ordered structure and susceptibility to light absorption of ZnO/calcium phosphate (5%) to enhance the stability of charge diffusion as a methylene blue bond breaker

Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

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Synthesis, structural and optical characteristics of Fe3O4/activated carbon photocatalysts to adsorb pesticide waste

Cited by 20 publications

References 80 publications

Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO2): Kinetics and Adsorption Studies of Methylene Blue and Congo Red

Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO2): Kinetics and Adsorption Studies of Methylene Blue and Congo Red

Highly ordered structure and susceptibility to light absorption of ZnO/calcium phosphate (5%) to enhance the stability of charge diffusion as a methylene blue bond breaker

Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

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Product

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Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO₂): Kinetics and Adsorption Studies of Methylene Blue and Congo Red

Treatment of Groundwater-Rich Organic Compounds Using Activated Carbon with Additional Germanium Dioxide (GeO₂): Kinetics and Adsorption Studies of Methylene Blue and Congo Red