Synthesize and characterize of Fe<sub>3</sub>O<sub>4</sub>/zeolite 4A magnetic nanocomposite

Cao, Jun; Sun, Qi; Wang, Peng; Shen, Jie; Dai, Xue Yu

doi:10.1080/01932691.2020.1843480

Cited by 10 publications

(5 citation statements)

References 54 publications

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“…However, the transmittance values of the peaks in the magnetic granite spectrum were found to increase (Figure 2). These results showed that the internal structure of granite did not change following modification with iron [55][56][57].…”

Section: Ftir Resultsmentioning

confidence: 79%

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Fe3O4@Granite: A Novel Magnetic Adsorbent for Dye Adsorption

Topal Canbaz

2023

Processes

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Magnetic granite (MG), a new and low-cost adsorbent, was prepared by the chemical co-precipitation of Fe2+ and Fe3+ using granite (G), which is a magmatic rock type. The adsorption of the Reactive Black 5 (RB5) dye from aqueous solutions on Fe3O4-modified granite was examined in a batch system. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), X-ray fluorescence spectrometry (XRF), X-ray diffractometry (XRD), N2 adsorption–desorption, vibrating-sample magnetometry (VSM), and point-of-zero charge (pHpzc) analysis were used to characterize the prepared MG. Magnetic granite displayed significant magnetization and could be easily separated using external magnets. The maximum adsorption capacity was 29.85 mg/g at 298 K. According to kinetic and isothermal examinations, the pseudo-second-order model and Langmuir isothermal adsorption were the best fit for adsorption. It was found that the enthalpy change ΔH (kJ/mol) was −31.76, and the entropy change ΔS (kJ/mol) was 0.096 for a temperature change of 298–330 K. The ΔG° (kJ/mol) value was negative at all temperatures (298 K, −2.86 kJ/mol; 303 K, −2.85 kJ/mol and 313 K, −1.50 kJ/mol), indicating that the adsorption of RB5 on MG was spontaneous.

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Section: Ftir Resultsmentioning

confidence: 79%

“…It is possible to find the specific vibrations of Fe-O bonds around 460 cm −1 and 570 cm −1 . When the granite and magnetic granite peaks were compared, we observed that some peaks were shifted to new values while other peaks disappeared [56][57][58]. In fact, the peaks at 643 cm −1 and 783 cm −1 disappeared.…”

Section: Ftir Resultsmentioning

confidence: 92%

Fe3O4@Granite: A Novel Magnetic Adsorbent for Dye Adsorption

Topal Canbaz

2023

Processes

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“…Figure 3(f) shows the analysis of SAED selective diffraction results. There are obvious diffraction rings, The existence of diffraction rings indicates the existence of crystals and the densification process of NaP zeolite with small grains and polycrystal [29] …”

Section: Resultsmentioning

confidence: 99%

“…There are obvious diffraction rings, The existence of diffraction rings indicates the existence of crystals and the densification process of NaP zeolite with small grains and polycrystal. [29] Figure 4 is the transmission electron microscope energy spectrum of NaP zeolite based on coal fly ash. It can be seen that the elements distributed on its surface are O, Si, Al and Na, which occupy the main elements in the structure of NaP zeolite, and their strength decreases in turn.…”

Section: Physical and Chemical Properties Of Coal Fly Ash-based Nap Z...mentioning

confidence: 99%

Synthesis of a Coal Fly Ash‐Based NaP Zeolite Using the Microwave‐Ultrasonic Assisted Method: Preparation, Growth Mechanism, and Kinetics

et al. 2023

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Fly ash was used as the raw material to prepare coal fly ash‐based NaP zeolite using the microwave‐ultrasonic‐hydrothermal method. The obtained NaP zeolite has a completed crystal structure, regular surface morphology, uniform particle size (about 1.6 um), large specific surface area (48.85 m2/g) and good thermal stability. Under microwave and ultrasonic external fields, the coal fly ash‐based NaP zeolite crystals grow in an S‐shape, achieving single crystal growth and uniform crystal growth size. The activation energy of NaP zeolite crystal growth Ea is 2.08 kJ/mol, the pre‐exponential factor A is 85.63.

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“…The specific surface area and pore size distribution of zeolite A were studied using N 2 adsorption-desorption technology. In the range of relative pressure P/P o = 0.5-1.0, pressure hysteresis is observed (Figure 7a), indicating that the sample contains a mesoporous structure [24][25][26][27][28]. The Brunauer-Emmett-Teller (BET) surface area of zeolite A obtained by BET method is 27.64 m 2 •g −1 .…”

Section: Bet Analysismentioning

confidence: 99%

Controllable Preparation of Cubic Zeolite A and Application of Langmuir Model in Carbon Dioxide Adsorption

et al. 2021

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A large amount of remaining fly ash has been piled up or landfilled, which not only a waste of land resources but also results in a series of environmental problems. Therefore, using fly ash to produce high value-added products is a win-win development orientation between human beings and nature. In this study, zeolite A is successfully synthesized using a hydrothermal method using fly ash. Additionally, it is at 1.0 mol·L−1 of the alkali concentration that the crystallinity of zeolite A reaches the maximum value, about 96.6%. FTIR research shows that the main secondary structural unit D4R vibration band of zeolite A appears at 555 cm−1. The results of the SEM study indicate the structure of zeolite A is cubic. The TEM results show that the crystal structure of the zeolite A belongs to the body-centered cubic structure. Meanwhile, the positively charged sodium ions cooperate with the silicon oxygen tetrahedron and the aluminum oxygen tetrahedron to form the zeolite A skeleton. Carbon dioxide adsorption equilibrium study shows that the maximum adsorption capacity of zeolite A of 46.5 mL·g−1 is significantly higher than the maximum adsorption capacity of commercial-grade zeolite 4A of 39.3 mL·g−1. In addition, the application of the Langmuir model in the adsorption of carbon dioxide by commercial-grade zeolite 4A and zeolite A is studied, which not only extends the application of zeolite A, but can be further extended to other zeolite materials as well. Meanwhile, the adsorption process belongs to the Langmuir model, which is a single layer adsorption on an ideal surface.

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Synthesize and characterize of Fe₃O₄/zeolite 4A magnetic nanocomposite

Cited by 10 publications

References 54 publications

Fe3O4@Granite: A Novel Magnetic Adsorbent for Dye Adsorption

Fe3O4@Granite: A Novel Magnetic Adsorbent for Dye Adsorption

Synthesis of a Coal Fly Ash‐Based NaP Zeolite Using the Microwave‐Ultrasonic Assisted Method: Preparation, Growth Mechanism, and Kinetics

Controllable Preparation of Cubic Zeolite A and Application of Langmuir Model in Carbon Dioxide Adsorption

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Synthesize and characterize of Fe3O4/zeolite 4A magnetic nanocomposite

Cited by 10 publications

References 54 publications

Fe3O4@Granite: A Novel Magnetic Adsorbent for Dye Adsorption

Fe3O4@Granite: A Novel Magnetic Adsorbent for Dye Adsorption

Synthesis of a Coal Fly Ash‐Based NaP Zeolite Using the Microwave‐Ultrasonic Assisted Method: Preparation, Growth Mechanism, and Kinetics

Controllable Preparation of Cubic Zeolite A and Application of Langmuir Model in Carbon Dioxide Adsorption

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Synthesize and characterize of Fe₃O₄/zeolite 4A magnetic nanocomposite