Insight into the structural, optical, adsorptive, and photocatalytic properties of MgFe2O4-bentonite nanocomposites

Kaur, Manpreet; Ubhi, Manpreet Kaur; Grewal, Jaspreet Kaur; Singh, Dhanwinder

doi:10.1016/j.jpcs.2021.110060

Cited by 25 publications

(13 citation statements)

References 34 publications

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“…A SEM micrograph of MGF-B ( Figure 4 d) confirmed that MgFe 2 O 4 NPs were incorporated into the bentonite layers. Similar micrographs have been observed upon the insertion of polypropylene into the layers of bentonite clay [ 19 ]. The SEM micrographs of BPGO depict a translucent and rippled silk waves with numerous crinkles possibly due to dopants and oxygeneous groups.…”

Section: Resultssupporting

confidence: 74%

“…They are mixed metal oxides of iron with promising adsorptive, photocatalytic and magnetic properties. Magnesium ferrite (MgFe 2 O 4 )-bentonite nanocomposite has been reported as an effective adsorbent and photocatalyst in our previous studies [ 19 , 20 , 21 ]. In the present work, nanoflowers of MgFe 2 O 4 -bentonite nanocomposite with boron and phosphorous co-doped GO (BPGO) were synthesized, which led to enhancement in the overall adsorptive and photocatalytic activity as compared to both the components.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical Nanoflowers of MgFe2O4, Bentonite and B-,P- Co-Doped Graphene Oxide as Adsorbent and Photocatalyst: Optimization of Parameters by Box–Behnken Methodology

Ubhi

Kaur

Singh

et al. 2022

IJMS

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In the present study, nanocomposites having hierarchical nanoflowers (HNFs) -like morphology were synthesized by ultra-sonication approach. HNFs were ternary composite of MgFe2O4 and bentonite with boron-, phosphorous- co-doped graphene oxide (BPGO). The HNFs were fully characterized using different analytical tools viz. X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersion spectroscopy, transmission electron microscopy, X-ray diffraction, vibrating sample magnetometry and Mössbauer analysis. Transmission electron micrographs showed that chiffon-like BPGO nanosheets were wrapped on the MgFe2O4-bentonite surface, resulting in a porous flower-like morphology. The red-shift in XPS binding energies of HNFs as compared to MgFe2O4-bentoniteand BPGO revealed the presence of strong interactions between the two materials. Box–Behnken statistical methodology was employed to optimize adsorptive and photocatalytic parameters using Pb(II) and malathion as model pollutants, respectively. HNFs exhibited excellent adsorption ability for Pb(II) ions, with the Langmuir adsorption capacity of 654 mg g−1 at optimized pH 6.0 and 96% photocatalytic degradation of malathion at pH 9.0 as compared to MgFe2O4-bentonite and BPGO. Results obtained in this study clearly indicate that HNFs are promising nanocomposite for the removal of inorganic and organic contaminants from the aqueous solutions.

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Section: Resultssupporting

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Hierarchical Nanoflowers of MgFe2O4, Bentonite and B-,P- Co-Doped Graphene Oxide as Adsorbent and Photocatalyst: Optimization of Parameters by Box–Behnken Methodology

Ubhi

Kaur

Singh

et al. 2022

IJMS

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“…Additionally, the integration between bentonite and some metal oxides or metal-based structures was reported as an effective technique to induce the physicochemical properties of bentonite. This included nickel Fe/Mg LDH [21], magnesium ferrite [28], MoS 2 [29], MgFe 2 O 4 [30], ZnO/CuO [31], and Bi 2 O 3 -ZnO [22]. ZnO nanoparticles, in addition to their base materials, have been assessed extensively as effective adsorbents and photocatalysts in the literature [32,33].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

et al. 2022

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A green ZnO@polynaniline/bentonite composite (G.Zn@PN/BE) was synthesized as an enhanced adsorbent for As (V) ions. Its adsorption properties were assessed in comparison with the integrated components of bentonite (BE) and polyaniline/bentonite (PN/BE) composites. The G.Zn@PN/BE composite achieved an As (V) retention capacity (213 mg/g) higher than BE (72.7 mg/g) and PN/BE (119.8 mg/g). The enhanced capacity of G.Zn@PN/BE was studied using classic (Langmuir) and advanced equilibrium (monolayer model of one energy) models. Considering the steric properties, the structure of G.Zn@PN/BE demonstrated a higher density of active sites (Nm = 109.8 (20 °C), 108.9 (30 °C), and 67.8 mg/g (40 °C)) than BE and PN/BE. This declared the effect of the integration process in inducing the retention capacity by increasing the quantities of the active sites. The number of adsorbed As (V) ions per site (1.76 up to 2.13) signifies the retention of two or three ions per site by a multi-ionic mechanism. The adsorption energies (from −3.07 to −3.26 kJ/mol) suggested physical retention mechanisms (hydrogen bonding and dipole bonding forces). The adsorption energy, internal energy, and free enthalpy reflected the exothermic, feasible, and spontaneous nature of the retention process. The structure is of significant As (V) uptake capacity in the existence of competitive anions or metal ions.

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“…[ 19,20 ] In the N 2 adsorption–desorption curve of Ca‐CG, it was found that the adsorption amount of P/P 0 between 0–0.4 increases slowly, and N 2 was gradually adsorbed inside Ca‐CG from a single layer to multiple layers. The rapid increase in the adsorption capacity of P/P 0 at 0.4–1.0 might be due to the existence of cavities between large particles 21 . After surface modification of SA, the specific surface area of Y‐CG decreased to 1.4594 m 2 /g.…”

Section: Resultsmentioning

confidence: 99%

“…The rapid increase in the adsorption capacity of P/P 0 at 0.4-1.0 might be due to the existence of cavities between large particles. 21 After surface modification of SA, the specific surface area of Y-CG decreased to 1.4594 m 2 /g. This decrease might be since SA coats the surface of Ca-CG, covering some pores on Ca-CG, making the specific surface area decrease.…”

Section: Bet Analysismentioning

confidence: 96%

A novel coal gangue thermal stabilizer and its effect on thermal stability and mechanical properties of poly(vinyl chloride)

Hou

et al. 2022

Vinyl Additive Technology

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Nontoxic and efficient coal gangue thermal stabilizer (Y-CG) was prepared by cheap and readily available calcium oxide, coal gangue (CG) and stearic acid(SA). The proposed mechanism of Y-CG thermal stability was studied by XRD, FT-IR, BET and thermal stability test. The results show that when the mass ratio of CG to water was 1:7, the loading of Ca(OH) 2 between CG sheets reached the maximum value of 3.01 mmol/g. The hydrophobic property of the Y-CG surface was better when modified at 75 C for 2 h with 5% SA. With 10% Y-CG, the Congo red test showed thermal stabilization time of PVC improved up to 55.9 min and the torque rheological test showed dynamic thermal stabilization time of PVC improved up to 62.10 min. The TG curves show that Y-CG had little effect on the onset degradation temperature of PVC. Still, Y-CG can absorb HCl and initiate the carbonization of PVC to inhibit degradation. Compared with the commonly used thermal stabilizers, the thermal stability of Y-CG was only slightly worse than that of hydrotalcite thermal stabilizers. The early reaction was that the strong base Ca(OH) 2 in Y-CG adsorbs HCl, and the CaCl 2 was stably loaded in the CG layered structure, which avoided the adverse effects caused by strongly alkaline. The late reaction was that SA and Ca(OH) 2 form weakly alkaline calcium stearate to absorb HCl. At the same time, calcium stearate can also be used as a compatibilizer to improve the compatibility between Y-CG and PVC.

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Insight into the structural, optical, adsorptive, and photocatalytic properties of MgFe2O4-bentonite nanocomposites

Cited by 25 publications

References 34 publications

Hierarchical Nanoflowers of MgFe2O4, Bentonite and B-,P- Co-Doped Graphene Oxide as Adsorbent and Photocatalyst: Optimization of Parameters by Box–Behnken Methodology

Hierarchical Nanoflowers of MgFe2O4, Bentonite and B-,P- Co-Doped Graphene Oxide as Adsorbent and Photocatalyst: Optimization of Parameters by Box–Behnken Methodology

Synthesis and Characterization of Green ZnO@polynaniline/Bentonite Tripartite Structure (G.Zn@PN/BE) as Adsorbent for As (V) Ions: Integration, Steric, and Energetic Properties

A novel coal gangue thermal stabilizer and its effect on thermal stability and mechanical properties of poly(vinyl chloride)

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